TY  - JOUR
A1  - Bung, Daniel B.
A1  - Valero, Daniel
T1  - Re-aeration on stepped spillways with special consideration of entrained and entrapped air
JF  - Geosciences
N2  - As with most high-velocity free-surface flows, stepped spillway flows become self-aerated when the drop height exceeds a critical value. Due to the step-induced macro-roughness, the flow field becomes more turbulent than on a similar smooth-invert chute. For this reason, cascades are oftentimes used as re-aeration structures in wastewater treatment. However, for stepped spillways as flood release structures downstream of deoxygenated reservoirs, gas transfer is also of crucial significance to meet ecological requirements. Prediction of mass transfer velocities becomes challenging, as the flow regime differs from typical previously studied flow conditions. In this paper, detailed air-water flow measurements are conducted on stepped spillway models with different geometry, with the aim to estimate the specific air-water interface. Re-aeration performances are determined by applying the absorption method. In contrast to earlier studies, the aerated water body is considered a continuous mixture up to a level where 75% air concentration is reached. Above this level, a homogenous surface wave field is considered, which is found to significantly affect the total air-water interface available for mass transfer. Geometrical characteristics of these surface waves are obtained from high-speed camera investigations. The results show that both the mean air concentration and the mean flow velocity have influence on the mass transfer. Finally, an empirical relationship for the mass transfer on stepped spillway models is proposed.
Y1  - 2018
SN  - 2076-3263
VL  - 8
IS  - 9
SP  - Article number 333
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Kerres, Karsten
A1  - Siekmann, Marko
T1  - Wie kommuniziere ich prognosegestützte Instandhaltungsstrategien erfolgreich in politischen Entscheidungsgremien?
JF  - 3 R. Fachzeitschrift für sichere und effiziente Rohleitungssysteme
Y1  - 2018
SN  - 2191-9798
IS  - 12
SP  - 47
EP  - 51
PB  - Vulkan-Verl.
CY  - Essen
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
A1  - Crookston, B.M.
T1  - Energy dissipation of a Type III basin under design and adverse conditions for stepped and smooth spillways
JF  - Journal of Hydraulic Engineering
N2  - New information regarding the influence of a stepped chute on the hydraulic performance of the United States Bureau of Reclamation (Reclamation) Type III hydraulic jump stilling basin is presented for design (steady) and adverse (decreasing tailwater) conditions. Using published experimental data and computational fluid dynamics (CFD) models, this paper presents a detailed comparison between smooth-chute and stepped-chute configurations for chute slopes of 0.8H:1V and 4H:1V and Froude numbers (F) ranging from 3.1 to 9.5 for a Type III basin designed for F = 8. For both stepped and smooth chutes, the relative role of each basin element was quantified, up to the most hydraulic extreme case of jump sweep-out. It was found that, relative to a smooth chute, the turbulence generated by a stepped chute causes a higher maximum velocity decay within the stilling basin, which represents an enhancement of the Type III basin’s performance but also a change in the relative role of the basin elements. Results provide insight into the ability of the CFD models [unsteady Reynolds-averaged Navier-Stokes (RANS) equations with renormalization group (RNG) k-ϵ turbulence model and volume-of-fluid (VOF) for free surface tracking] to predict the transient basin flow structure and velocity profiles. Type III basins can perform adequately with a stepped chute despite the effects steps have on the relative role of each basin element. It is concluded that the classic Type III basin design, based upon methodology by reclamation specific to smooth chutes, can be hydraulically improved for the case of stepped chutes for design and adverse flow conditions using the information presented herein.
Y1  - 2018
U6  - http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0001482
SN  - 0733-9429
N1  - Article number 04018036
VL  - 144
IS  - 7
PB  - ASCE
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
T1  - Vectrino profiler spatial filtering for shear flows based on the mean velocity gradient equation
JF  - Journal of Hydraulic Engineering
N2  - A new methodology is proposed to spatially filter acoustic Doppler velocimetry data from a Vectrino profiler based on the differential mean velocity equation. Lower and upper bounds are formulated in terms of physically based flow constraints. Practical implementation is discussed, and its application is tested against data gathered from an open-channel flow over a stepped macroroughness surface. The method has proven to detect outliers occurring all over the distance range sampled by the Vectrino profiler and has shown to remain applicable out of the region of validity of the velocity gradient equation. Finally, a statistical analysis suggests that physically obtained bounds are asymptotically representative.
Y1  - 2018
U6  - http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0001485
SN  - 0733-9429
N1  - Article number 04018037
VL  - 144
IS  - 7
PB  - ASCE
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Zhang, G.
A1  - Valero, Daniel
A1  - Bung, Daniel B.
A1  - Chanson, H.
T1  - On the estimation of free-surface turbulence using ultrasonic sensors
JF  - Flow Measurement and Instrumentation
N2  - Accurate determination of free-surface dynamics has attracted much research attention during the past decade and has important applications in many environmental and water related areas. In this study, the free-surface dynamics in several turbulent flows commonly found in nature were investigated using a synchronised setup consisting of an ultrasonic sensor and a high-speed video camera. Basic sensor capabilities were examined in dry conditions to allow for a better characterisation of the present sensor model. The ultrasonic sensor was found to adequately reproduce free-surface dynamics up to the second order, especially in two-dimensional scenarios with the most energetic modes in the low frequency range. The sensor frequency response was satisfactory in the sub-20 Hz band, and its signal quality may be further improved by low-pass filtering prior to digitisation. The application of the USS to characterise entrapped air in high-velocity flows is also discussed.
Y1  - 2018
U6  - http://dx.doi.org/10.1016/j.flowmeasinst.2018.02.009
SN  - 0955-5986
VL  - 60
SP  - 171
EP  - 184
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kerpen, Nils B.
A1  - Bung, Daniel B.
A1  - Valero, Daniel
A1  - Schlurmann, Torsten
T1  - Energy dissipation within the wave run-up at stepped revetments
JF  - Journal of Ocean University of China
Y1  - 2017
U6  - http://dx.doi.org/10.1007/s11802-017-3355-z
SN  - 1993-5021
VL  - 16
IS  - 4
SP  - 649
EP  - 654
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
T1  - Artificial Neural Networks and pattern recognition for air-water flow velocity estimation using a single-tip optical fibre probe
JF  - Journal of Hydro-environment Research
Y1  - 2017
U6  - http://dx.doi.org/10.1016/j.jher.2017.08.004
SN  - 1570-6443
VL  - 19
IS  - 3
SP  - 150
EP  - 159
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
T1  - Reformulating self-aeration in hydraulic structures: Turbulent growth of free surface perturbations leading to air entrainment
JF  - International Journal of Multiphase Flow
N2  - A new formulation for the prediction of free surface dynamics related to the turbulence occurring nearby is proposed. This formulation, altogether with a breakup criterion, can be used to compute the inception of self-aeration in high velocity flows like those occurring in hydraulic structures. Assuming a simple perturbation geometry, a kinematic and a non-linear momentum-based dynamic equation are formulated and forces acting on a control volume are approximated. Limiting steepness is proposed as an adequate breakup criterion. Role of the velocity fluctuations normal to the free surface is shown to be the main turbulence quantity related to self-aeration and the role of the scales contained in the turbulence spectrum are depicted. Surface tension force is integrated accounting for large displacements by using differential geometry for the curvature estimation. Gravity and pressure effects are also contemplated in the proposed formulation. The obtained equations can be numerically integrated for each wavelength, hence resulting in different growth rates and allowing computation of the free surface roughness wavelength distribution. Application to a prototype scale spillway (at the Aviemore dam) revealed that most unstable wavelength was close to the Taylor lengthscale. Amplitude distributions have been also obtained observing different scaling for perturbations stabilized by gravity or surface tension. The proposed theoretical framework represents a new conceptualization of self-aeration which explains the characteristic rough surface at the non-aerated region as well as other previous experimental observations which remained unresolved for several decades.
Y1  - 2018
U6  - http://dx.doi.org/10.1016/j.ijmultiphaseflow.2017.12.011
SN  - 0301-9322
VL  - 100
SP  - 127
EP  - 142
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Laumann, Jörg
A1  - Mainz, Stefan
A1  - Krahwinkel, Manuel
T1  - Traglastuntersuchungen an Koppelpfetten bei Biegung um die schwache Achse und Torsion
JF  - Stahlbau
Y1  - 2017
U6  - http://dx.doi.org/10.1002/stab.201710544
SN  - 0038-9145
VL  - 86
IS  - 11
SP  - 1005
EP  - 1016
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Moorkamp, Wilfried
A1  - Peterson, Leif Arne
A1  - Uibel, Thomas
T1  - Mit guten Aussichten. Bericht über den Studiengang Holzingenieurwesen an der FH Aachen
JF  - Bauen mit Holz
Y1  - 2016
SN  - 0005-6545
N1  - gedruckte Zeitschrift in der Bereichsbibliothek Bayernallee
IS  - 5
SP  - 33
EP  - 36
PB  - Rudolf Müller
CY  - Köln
ER  - 
TY  - JOUR
A1  - Uibel, Thomas
T1  - Untersuchungen zum Spaltverhalten von Holzschrauben. Teil 1
JF  - Bauen mit Holz
Y1  - 2016
SN  - 0005-6545
N1  - gedruckte Zeitschrift in der Bereichsbibliothek Bayernallee
IS  - 10
SP  - 40
EP  - 42
PB  - Rudolf Müller
CY  - Köln
ER  - 
TY  - JOUR
A1  - Peterson, Leif Arne
A1  - Röth, Thilo
A1  - Uibel, Thomas
T1  - Einsatz von Holzwerkstoffen in Fahrzeugstrukturen
JF  - Bauen mit Holz
Y1  - 2017
SN  - 0005-6545
N1  - gedruckt in der Bereichsbibliothek Bayernallee
IS  - 3
SP  - 32
EP  - 38
PB  - Bruderverlag
CY  - Köln
ER  - 
TY  - JOUR
A1  - Höttges, Jörg
T1  - QKan - Management of drainage system data with QGIS
JF  - Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
Y1  - 2017
VL  - 17
IS  - Article 13
SP  - 95
EP  - 100
ER  - 
TY  - JOUR
A1  - Hebel, Christoph
T1  - Erfahrungen mit der RIN und aktuelle Weiterentwicklungen
JF  - Straßenverkehrstechnik: Organ der Forschungsgesellschaft für Straßen- und Verkehrswesen, der Bundesvereinigung der Straßenbau- und Verkehrsingenieure und der Österreichischen Forschungsgesellschaft Straße und Verkehr; Zeitschrift für Verkehrsplanung, Verkehrsmanagement, Verkehrssicherheit, Verkehrstechnik
Y1  - 2017
SN  - 0039-2219
N1  - gedruckt in der Bereichsbibliothek Bayernallee vorhanden
VL  - 61
IS  - 7
SP  - 443
EP  - 448
PB  - Kirschbaum-Verlag
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Pyschny, D.
A1  - Döring, Bernd
A1  - Feldmann, M.
T1  - Ermittlung der thermischen Leistungsfähigkeit des neuartigen multifunktionalen Verbunddeckensystems InaDeck
JF  - Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen
Y1  - 2014
SN  - 0005-6650
N1  - Printausgabe in der Bibliothek Bayernallee vorhanden: 13 Z 049-2014
VL  - 89
IS  - 3
SP  - 116
EP  - 124
PB  - VDI Fachmedien
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Reger, V.
A1  - Döring, Bernd
A1  - Kuhnhenne, M.
T1  - Passive und aktive Maßnahmen zur Flächenkühlung im Stahl(leicht)bau
JF  - Bauingenieur
N2  - Mit steigenden Dämmstandards und höheren Komfortanforderungen der Nutzer gerät die Problematik der sommerlichen Überhitzung zunehmend in den Fokus. Um die Überhitzung möglichst gering zu halten, sind Maßnahmen und Lösungen zu entwickeln, die den potenziellen Kühlbedarf eines Gebäudes vermeiden sowie reduzieren. Im Rahmen des europäischen Forschungsprojektes BATIMASS wurden Techniken untersucht, die die sommerliche Raumtemperatur ohne zusätzliche Kühlung (passiv) oder aber mit energieeffizienter wasserbasierter Flächenkühlung (aktiv) reduzieren und die besonders für Gebäude in Stahl(leicht)bauweise geeignet sind. Dafür wurde die Methodik der thermisch äquivalenten Decke weiterentwickelt, um das thermische Verhalten von Profilblechdecken in Gebäuden für beide Lösungsansätze analysieren zu können. Darüber hinaus wurde der Einsatz von Phasenwechselmaterial (PCM) zur Steigerung der Speicherfähigkeit von leichten Decken mit besonders geringer thermischer Masse in Simulationen sowie im Labor untersucht und bewertet.
Y1  - 2016
U6  - http://dx.doi.org/10.37544/0005-6650-2016-07-08-63
SN  - 0005-6650
N1  - gedruckt in der Bereichsbibliothek Bayernallee unter der Signatur 13 Z 049
VL  - 91
IS  - Jul/Aug
SP  - 309
EP  - 316
PB  - VDI Fachmedien
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Bung, Daniel B.
A1  - Valero, Daniel
T1  - Optical flow estimation in aerated flows
JF  - Journal of Hydraulic Research
N2  - Optical flow estimation is known from Computer Vision where it is used to determine obstacle movements through a sequence of images following an assumption of brightness conservation. This paper presents the first study on application of the optical flow method to aerated stepped spillway flows. For this purpose, the flow is captured with a high-speed camera and illuminated with a synchronized LED light source. The flow velocities, obtained using a basic Horn–Schunck method for estimation of the optical flow coupled with an image pyramid multi-resolution approach for image filtering, compare well with data from intrusive conductivity probe measurements. Application of the Horn–Schunck method yields densely populated flow field data sets with velocity information for every pixel. It is found that the image pyramid approach has the most significant effect on the accuracy compared to other image processing techniques. However, the final results show some dependency on the pixel intensity distribution, with better accuracy found for grey values between 100 and 150.
Y1  - 2016
U6  - http://dx.doi.org/10.1080/00221686.2016.1173600
VL  - 54
IS  - 5
SP  - 575
EP  - 580
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Lopes, Pedro
A1  - Leandro, Jorge
A1  - Carvalho, Rita F.
A1  - Bung, Daniel B.
T1  - Alternating skimming flow over a stepped spillway
JF  - Environmental Fluid Mechanics
Y1  - 2017
U6  - http://dx.doi.org/10.1007/s10652-016-9484-x
SN  - 1573-1510
VL  - 17
IS  - 2
SP  - 303
EP  - 322
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
T1  - Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow
JF  - Environmental Modelling and Software
N2  - Environmental discharges have been traditionally designed by means of cost-intensive and time-consuming experimental studies. Some extensively validated models based on an integral approach have been often employed for water quality problems, as recommended by USEPA (i.e.: CORMIX). In this study, FLOW-3D is employed for a full 3D RANS modelling of two turbulent jet-to-crossflow cases, including free surface jet impingement. Results are compared to both physical modelling and CORMIX to better assess model performance. Turbulence measurements have been collected for a better understanding of turbulent diffusion's parameter sensitivity. Although both studied models are generally able to reproduce jet trajectory, jet separation downstream of the impingement has been reproduced only by RANS modelling. Additionally, concentrations are better reproduced by FLOW-3D when the proper turbulent Schmidt number is used. This study provides a recommendation on the selection of the turbulence model and the turbulent Schmidt number for future outfall structures design studies.
Y1  - 2016
U6  - http://dx.doi.org/10.1016/j.envsoft.2016.04.030
SN  - 1364-8152 (electronic)
VL  - 82
SP  - 218
EP  - 228
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Valero, Daniel
A1  - Bung, Daniel B.
T1  - Development of the interfacial air layer in the non-aerated region of high-velocity spillway flows: Instabilities growth, entrapped air and influence on the self-aeration onset
JF  - International Journal of Multiphase Flow
N2  - Self-aeration is traditionally explained by the water turbulent boundary layer outer edge intersection with the free surface. This paper presents a discussion on the commonly accepted hypothesis behind the computation of the critical point of self-aeration in spillway flows and a new formulation is proposed based on the existence of a developing air flow over the free surface. Upstream of the inception point of self-aeration, some surface roughening has been often reported in previous studies which consequently implies some entrapped air transport and air–water flows coupling. Such air flow is proven in this study by presenting measured air velocities and computing the air boundary layer thickness for a 1V:2H smooth chute flow. Additionally, the growth rate of free surface waves has been analysed by means of Ultrasonic Sensors measurements, obtaining also the entrapped air concentration. High-speed camera imaging has been used for qualitative study of the flow perturbations.
Y1  - 2016
U6  - http://dx.doi.org/10.1016/j.ijmultiphaseflow.2016.04.012
SN  - 0301-9322
VL  - 84
SP  - 66
EP  - 74
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bayon, Arnau
A1  - Valero, Daniel
A1  - Garcia-Bartual, Rafael
A1  - Vallés-Morán, Francisco José
A1  - López-Jiménez, P. Amparo
T1  - Performance assessment of OpenFOAM and FLOW-3D in the numerical modeling of a low Reynolds number hydraulic jump
JF  - Environmental Modelling & Software
N2  - A comparative performance analysis of the CFD platforms OpenFOAM and FLOW-3D is presented, focusing on a 3D swirling turbulent flow: a steady hydraulic jump at low Reynolds number. Turbulence is treated using RANS approach RNG k-ε. A Volume Of Fluid (VOF) method is used to track the air–water interface, consequently aeration is modeled using an Eulerian–Eulerian approach. Structured meshes of cubic elements are used to discretize the channel geometry. The numerical model accuracy is assessed comparing representative hydraulic jump variables (sequent depth ratio, roller length, mean velocity profiles, velocity decay or free surface profile) to experimental data. The model results are also compared to previous studies to broaden the result validation. Both codes reproduced the phenomenon under study concurring with experimental data, although special care must be taken when swirling flows occur. Both models can be used to reproduce the hydraulic performance of energy dissipation structures at low Reynolds numbers.
Y1  - 2016
SN  - 1364-8152
U6  - http://dx.doi.org/10.1016/j.envsoft.2016.02.018
VL  - 80
SP  - 322
EP  - 335
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Laumann, Jörg
A1  - Mainz, Stefan
T1  - Direkte Ermittlung der erforderlichen Einspanntiefe von I‑förmigen Stahlquerschnitten in Betonkonstruktionen
N2  - Für die Ermittlung der erforderlichen Einspanntiefe von eingespannten Stahlquerschnitten in Betonkonstruktionen existieren verschiedene Bemessungsmodelle. Diese basieren vorwiegend auf Grundlage nationaler Normen wie z. B. DIN 18800 [1] und DIN 1045 [2], die durch die europäische Normung ersetzt wurden. Aus diesem Grund wird in diesem Aufsatz ein Berechnungsmodell für die erforderliche Einspanntiefe von eingespannten Stahlquerschnitten in Betonkonstruktionen auf Grundlage des Eurocodes vorgestellt. Das Grundgerüst für dieses Berechnungsmodell bildet das Verfahren nach Kindmann und Laumann, welches in [3] behandelt wurde. Gleichzeitig werden neue Formeln zur direkten Ermittlung der Mindesteinspanntiefe vorgestellt. Behandelt werden gewalzte I-Profile für einachsige Biegung um die starke Achse (y-y) mit Drucknormalkraft.
Y1  - 2012
U6  - http://dx.doi.org/10.1002/stab.201201620
SN  - 1437-1049
VL  - 81
IS  - 11
SP  - 850
EP  - 860
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Egner, Ralf
A1  - Heyde, Stefan
A1  - Laumann, Jörg
A1  - Prokop, Ines
T1  - Vorschläge für eine anwenderfreundliche und praxistaugliche Novellierung der allgemeinen Bemessungsregeln und Regeln für den Hochbau (EN 1993 Teil 1-1)
JF  - Stahlbau
Y1  - 2015
U6  - http://dx.doi.org/10.1002/stab.201510321
SN  - 1437-1049
VL  - 84
IS  - 10
SP  - 811
EP  - 822
PB  - Ernst & Sohn
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Oertel, Mario
A1  - Bung, Daniel B.
T1  - Numerische Strömungssimulationen von Fließgewässern : Praxisanwendungen und zukünftige Entwicklungen
JF  - Korrespondenz Wasserwirtschaft : KW
Y1  - 2015
SN  - 1616-430X
VL  - 8
IS  - H. 3
SP  - 177
EP  - 182
PB  - Gesellschaft zur Förderung der Abwassertechnik
CY  - Hennef
ER  - 
TY  - JOUR
A1  - Oertel, Mario
A1  - Bung, Daniel B.
T1  - Stability and scour development of bed material on crossbar block ramps
JF  - International journal of sediment research
N2  - Block ramps are ecologically oriented drop structures with adequate energy dissipation and partially moderate flow velocities. A special case is given with crossbar block ramps, where the upstream and downstream level difference is reduced by a series of basins. To prevent the total structure from failing, the stability of single boulders within the crossbars and the bed material in between must be guaranteed. The present paper addresses the stability of bed material and scour development for various flow regimes. Any bed material erosion may affect the stability of the crossbar boulders, which in turn can result in major damages of the ramp. Therefore new design approaches are developed to choose an appropriate bed material size and to avoid failures of crossbar block ramp structures.
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.ijsrc.2014.12.003
SN  - 1001-6279
VL  - 30
IS  - 4
SP  - 344
EP  - 350
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Reger, Vitali
A1  - Kuhnhenne, Markus
A1  - Feldmann, Markus
A1  - Kesti, Jyrki
A1  - Lawson, Mark
A1  - Botti, Andrea
T1  - Steel solutions for enabling zero-energy buildings
JF  - Steel Construction - Design
and Research
Y1  - 2015
U6  - http://dx.doi.org/10.1002/stco.201510029
SN  - 1867-0539
N1  - The 13th Nordic Steel Construction Conference, Tampere, 2015 (NSCC-2015)
VL  - 8
IS  - 3
SP  - 194
EP  - 200
PB  - Ernst & Sohn
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
A1  - Kolymbas, Dimitrios
T1  - Theoretische Untersuchung zur Ortsbruststabilität
JF  - Bautechnik : Zeitschrift für den gesamten Ingenieurbau
Y1  - 2005
U6  - http://dx.doi.org/10.1002/bate.200590151
SN  - 1437-0999 (E-Journal); 0005-6820 (Print); 0932-8351 (Print)
N1  - Gedruckt in der Bibliothek Bayernallee vorhanden: 13 Z 177-2005
VL  - Bd. 82
IS  - H. 7
SP  - 449
EP  - 456
ER  - 
TY  - JOUR
A1  - Giese, S.
A1  - Kirsch, Ansgar
A1  - Ziegler, M.
T1  - Numerische Untersuchung von Schervorgängen mit der Diskrete-Partikel-Methode
JF  - Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik
Y1  - 2006
SN  - 0005-6650
N1  - Gedruckt in der Bibliothek Bayernallee vorhanden: 13 Z 049-2006
VL  - Bd. 81
IS  - H. 5
SP  - 232
EP  - 239
ER  - 
TY  - JOUR
A1  - Kolymbas, Dimitrios
A1  - Fellin, W.
A1  - Kirsch, Ansgar
T1  - Squeezing due to stress relaxation in foliated rock
JF  - International journal for numerical and analytical methods in geomechanics
Y1  - 2006
U6  - http://dx.doi.org/10.1002/nag.530
SN  - 1096-9853 (E-Journal); 0363-9061 (Print)
VL  - Vol. 30
IS  - Iss. 13
SP  - 1357
EP  - 1367
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
T1  - Experimentelle Untersuchung des Ortsbrustversagens seichter Tunnel
JF  - Österreichische Bauwirtschaft
Y1  - 2008
IS  - Sondernr.
SP  - 6
EP  - 9
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
A1  - Piazzi, Lukas
T1  - Numerical investigation of the effectiveness of a bored pile wall for the minimisation of settlement resulting from tunnel driving
T1  - Numerische Untersuchung der Wirkungsweise einer Bohrpfahlwand zur Minimierung der Setzungen infolge Tunnel
JF  - Geomechanics and tunnelling
Y1  - 2009
U6  - http://dx.doi.org/10.1002/geot.200900063
SN  - 1865-7362
VL  - Vol. 2
IS  - Iss. 6
SP  - 753
EP  - 765
ER  - 
TY  - JOUR
A1  - Kolymbas, Dimitrios
A1  - Kirsch, Ansgar
T1  - Zum Erddruck auf Lawinenschutzgalerien
JF  - Bautechnik : Zeitschrift für den gesamten Ingenieurbau
Y1  - 2009
U6  - http://dx.doi.org/10.1002/bate.200910075
SN  - 1437-0999 (E-Journal); 0005-6820 (Print); 0932-8351 (Print)
N1  - Auch gedruckt in der Bibliothek Bayernallee vorhanden
VL  - Vol. 86
IS  - Iss. 12
SP  - 774
EP  - 779
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
T1  - Experimental investigation of the face stability of shallow tunnels in sand
JF  - Acta Geotechnica
N2  - Various models have been proposed for the prediction of the necessary support pressure at the face of a shallow tunnel. To assess their quality, the collapse of a tunnel face was modelled with small-scale model tests at single gravity. The development of the failure mechanism and the support force at the face in dry sand were investigated. The observed displacement patterns show a negligible influence of overburden on the extent and evolution of the failure zone. The latter is significantly influenced, though, by the initial density of the sand: in dense sand a chimney-wedge-type collapse mechanism developed, which propagated towards the soil surface. Initially, loose sand did not show any discrete collapse mechanism. The necessary support force was neither influenced by the overburden nor the initial density. A comparison with quantitative predictions by several theoretical models showed that the measured necessary support pressure is overestimated by most of the models. Those by Vermeer/Ruse and Léca/Dormieux showed the best agreement to the measurements.
Y1  - 2010
U6  - http://dx.doi.org/10.1007/s11440-010-0110-7
SN  - 1861-1125
VL  - 5
IS  - 1
SP  - 43
EP  - 62
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Fellin, Wolfgang
A1  - King, Julian
A1  - Kirsch, Ansgar
A1  - Oberguggenberger, Michael
T1  - Uncertainty modelling and sensitivity analysis of tunnel face stability
JF  - Structural safety
N2  - This paper proposes an approach to the choice and evaluation of engineering models with the aid of a typical application in geotechnics. An important issue in the construction of shallow tunnels, especially in weak ground conditions, is the tunnel face stability. Various theoretical and numerical models for predicting the necessary support pressure have been put forth in the literature. In this paper, we combine laboratory experiments performed at the University of Innsbruck with current methods of uncertainty and sensitivity analysis for assessing adequacy, predictive power and robustness of the models. The major issues are the handling of the twofold uncertainty of test results and of model predictions as well as the decision about what are the influential input parameters.
Y1  - 2010
U6  - http://dx.doi.org/10.1016/j.strusafe.2010.06.001
SN  - 0167-4730
VL  - 32
IS  - 6
SP  - 402
EP  - 410
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Demny, Andreas
A1  - Hebel, Christoph
T1  - Rechnergestützte Ermittlung der Verbindungsfunktionsstufen und der verbindungsbezogenen Angebotsqualität nach den Richtlinien für integrierte Netzgestaltung nach RIN 2008
JF  - Straßenverkehrstechnik : Organ der Forschungsgesellschaft für Straßen- und Verkehrswesen, der Bundesvereinigung der Straßenbau- und Verkehrsingenieure und der Österreichischen Forschungsgesellschaft Straße und Verkehr ; Zeitschrift für Verkehrsplanung, Verkehrsmanagement, Verkehrssicherheit, Verkehrstechnik
Y1  - 2014
SN  - 0039-2219
VL  - Jg. 58
IS  - H. 12
SP  - 811
EP  - 820
PB  - Kirschbaum Verlag
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Meinzinger, Michael
A1  - Bagayoko, Lamine
A1  - Koch, Eckart
T1  - Die Lagerung der Lehrter Bahnhofsbrücken
JF  - Bauingenieur
Y1  - 2003
SN  - 1436-4867 (E-Journal); 0005-6650 (Print)
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 049-2003
VL  - Bd. 78
IS  - H. 2
SP  - 73
EP  - 85
ER  - 
TY  - JOUR
A1  - Leandro, J.
A1  - Bung, Daniel B.
A1  - Carvalho, R.
T1  - Measuring void fraction and velocity fields of a stepped spillway for skimming flow using non-intrusive methods
JF  - Experiments in fluids
Y1  - 2014
U6  - http://dx.doi.org/10.1007/s00348-014-1732-6
SN  - 0723-4864 (Print) ; 1432-1114 (Online)
IS  - 55
SP  - Art. 1732
PB  - Springer Nature
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Malecha, Hartmut
A1  - Klubert, J.
A1  - Heinen-Fuchs, Sabine
T1  - Laserscanning passe? 3-D-Oberflächenmodelle aus Bilddaten und deren messtechnischer Nutzen
JF  - Wasserwirtschaft
Y1  - 2014
SN  - 0043-0978
N1  - Die Zeitschrift ist gedruckt in der Bibliothek Bayernallee vorhanden.
VL  - Jg. 104
IS  - Nr. 9
SP  - 32
EP  - 35
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Bung, Daniel B.
T1  - Fließcharakteristik und Sauerstoffeintrag bei selbstbelüfteten Gerinneströmungen auf Kaskaden mit gemäßigter Neigung
JF  - Österreichische Wasser- und Abfallwirtschaft
Y1  - 2011
SN  - 1613-7566 (E-Journal); 0945-358X (Print)
VL  - Vol. 63
IS  - Iss. 3-4
SP  - 76
EP  - 81
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Bung, Daniel B.
T1  - Developing flow in skimming flow regime on embankment stepped spillways
JF  - Journal of hydraulic research
Y1  - 2011
SN  - 1814-2079 (E-Journal); 0022-1686 (Print)
VL  - Vol. 49
IS  - Iss. 5
SP  - 639
EP  - 648
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Oertel, Mario
A1  - Bung, Daniel B.
T1  - Initial stage of two-dimensional dam-break waves: laboratory versus VOF
JF  - Journal of hydraulic research
N2  - Since several decades, dam-break waves have been of main research interest. Mathematical approaches have been developed by analytical, physical and numerical models within the past 120 years. During the past 10 years, the number of research investigations has increased due to improved measurement techniques as well as significantly increased computer memories and performances. In this context, the present research deals with the initial stage of two-dimensional dam-break waves by comparing physical and numerical model results as well as analytical approaches. High-speed images and resulting particle image velocimetry calculations are thereby compared with the numerical volume-of-fluid (VOF) method, included in the commercial code FLOW-3D. Wave profiles and drag forces on placed obstacles are analysed in detail. Generally, a good agreement between the laboratory and VOF results is found.
KW  - VOF
KW  - PIV
KW  - physical model
KW  - numerical model
KW  - drag force
KW  - dam-break
Y1  - 2012
U6  - http://dx.doi.org/10.1080/00221686.2011.639981
SN  - 1814-2079 (E-Journal); 0022-1686 (Print)
VL  - 50
IS  - 1
SP  - 89
EP  - 97
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Bung, Daniel B.
T1  - Non-intrusive detection of air–water surface roughness in self-aerated chute flows
JF  - Journal of hydraulic research
Y1  - 2013
SN  - 1814-2079 (E-Journal); 0022-1686 (Print)
VL  - Vol. 51
IS  - Iss. 3
SP  - 322
EP  - 329
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Kuck, Herbert
A1  - Döring, Bernd
T1  - Regenerative Energien in Landesbauten : Land NRW unterstützt Einsatz erneuerbarer Energien 1997 mit 15 Mio. DM
JF  - Die Bauverwaltung mit Bauamt und Gemeindebau
Y1  - 1997
SN  - 0005-6847
VL  - Bd. 70
IS  - H. 8
SP  - 384
EP  - 386
ER  - 
TY  - JOUR
A1  - Thiel, Dieter
A1  - Döring, Bernd
T1  - Dezentrale Raumklimatisierung durch die Fassade
JF  - TAB Technik am Bau
Y1  - 2001
SN  - 0341-2032
VL  - Bd. 32
IS  - H. 3
SP  - 67
EP  - 76
ER  - 
TY  - JOUR
A1  - Ziller, Claudia
A1  - Döring, Bernd
T1  - Doppelfassaden - vom Experimentalmodell zum Massanzug
JF  - TAB Technik am Bau
Y1  - 2004
SN  - 0341-2032
VL  - Bd. 35
IS  - H. 12
SP  - 58
EP  - 63
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Hechler, O.
A1  - Weber, F.
A1  - Sedlacek, Gerhard
T1  - Thermische Aktivierung von Fertigteildecken
JF  - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik
Y1  - 2004
SN  - 1436-5103
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739
VL  - Jg. 55
IS  - Nr. 5
SP  - 24
EP  - 35
ER  - 
TY  - JOUR
A1  - Feldmann, Markus
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Sedlacek, Gerhard
T1  - Zum Thema “Nachhaltigkeit” in der Stahlbauindustrie
JF  - Stahlbau
Y1  - 2008
SN  - 0038-9145
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 181
VL  - Vol. 77
IS  - Iss. 10
SP  - 713
EP  - 720
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Hellberg, Jan
A1  - Feldmann, Markus
T1  - Aktive und passive Temperierung eines Stahldeckensystems : numerische und messtechnische Untersuchungen. T. 1
JF  - HLH : Lüftung, Klima, Heizung, Sanitär, Gebäudetechnik
Y1  - 2008
SN  - 1436-5103, 0017-9906, 1434-422X, 1436-5103
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739
VL  - Bd. 59
IS  - H. 10
SP  - 54
EP  - 60
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Hellberg, Jan
A1  - Feldmann, Markus
T1  - Aktive und passive Temperierung eines Stahldeckensystems : thermische Bauteilaktivierung : numerische und messtechnische Untersuchungen. T. 2.
JF  - HLH Lüftung/Klima, Heizung/Sanitär, Gebäudetechnik
Y1  - 2008
SN  - 1436-5103
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 739
VL  - Bd. 59
IS  - H. 11
SP  - 37
EP  - 41
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Feldmann, Markus
A1  - Kuhnhenne, Markus
T1  - Der Beitrag von Profilblechdecken zur passiven Kühlung
JF  - Bauphysik
Y1  - 2009
SN  - 1437-0980 (E-Journal); 0171-5445 (Print)
N1  - Printausg. in der Bibliothek Bayernallee vorhanden: 13 Z 435
VL  - Vol. 31
IS  - Iss. 2
SP  - 65
EP  - 71
PB  - Wiley
CY  - Weinheim
ER  -