@article{BeckerFrauenrathHezeletal.2010,
  author    = {Becker, Meike and Frauenrath, Tobias and Hezel, Fabian and Krombach, Gabriele A. and Kremer, Ute and Koppers, Benedikt and Butenweg, Christoph and Goemmel, Andreas and Utting, Jane F. and Schulz-Menger, Jeanette and Niendorf, Thoralf},
  title     = {Comparison of left ventricular function assessment using phonocardiogram- and electrocardiogram-triggered 2D SSFP CINE MR imaging at 1.5 T and 3.0 T},
  series = {European Radiology},
  volume    = {20},
  journal   = {European Radiology},
  publisher = {Springer},
  address   = {Berlin},
  issn      = {1432-1084 (Onlineausgabe)},
  doi       = {10.1007/s00330-009-1676-z},
  pages     = {1344 -- 1355},
  year      = {2010},
  abstract  = {Objective: As high-field cardiac MRI (CMR) becomes more widespread the propensity of ECG to interference from electromagnetic fields (EMF) and to magneto-hydrodynamic (MHD) effects increases and with it the motivation for a CMR triggering alternative. This study explores the suitability of acoustic cardiac triggering (ACT) for left ventricular (LV) function assessment in healthy subjects (n=14). Methods: Quantitative analysis of 2D CINE steady-state free precession (SSFP) images was conducted to compare ACT's performance with vector ECG (VCG). Endocardial border sharpness (EBS) was examined paralleled by quantitative LV function assessment. Results: Unlike VCG, ACT provided signal traces free of interference from EMF or MHD effects. In the case of correct Rwave recognition, VCG-triggered 2D CINE SSFP was immune to cardiac motion effects—even at 3.0 T. However, VCG-triggered 2D SSFP CINE imaging was prone to cardiac motion and EBS degradation if R-wave misregistration occurred. ACT-triggered acquisitions yielded LV parameters (end-diastolic volume (EDV), endsystolic volume (ESV), stroke volume (SV), ejection fraction (EF) and left ventricular mass (LVM)) comparable with those derived fromVCG-triggered acquisitions (1.5 T: ESVVCG=(56± 17) ml, EDVVCG=(151±32)ml, LVMVCG=(97±27) g, SVVCG=(94± 19)ml, EFVCG=(63±5)\% cf. ESVACT= (56±18) ml, EDVACT=(147±36) ml, LVMACT=(102±29) g, SVACT=(91± 22) ml, EFACT=(62±6)\%; 3.0 T: ESVVCG=(55±21) ml, EDVVCG=(151±32) ml, LVMVCG=(101±27) g, SVVCG=(96±15) ml, EFVCG=(65±7)\% cf. ESVACT=(54±20) ml, EDVACT=(146±35) ml, LVMACT= (101±30) g, SVACT=(92±17) ml, EFACT=(64±6)\%). Conclusions: ACT's intrinsic insensitivity to interference from electromagnetic fields renders},
  language  = {en}
}
@article{ButenwegGellertSchlundt2010,
  author    = {Butenweg, Christoph and Gellert, Christoph and Schlundt, Andreas},
  title     = {Nichtlinearer Erdbebennachweis von Geb{\"a}uden aus Kalksandsteinmauerwerk nach DIN EN 1998},
  series = {Mauerwerk : European journal of masonry},
  volume    = {14},
  journal   = {Mauerwerk : European journal of masonry},
  number    = {3},
  publisher = {Ernst \& Sohn},
  address   = {Berlin},
  issn      = {1432-3427},
  doi       = {10.1002/dama.201000463},
  pages     = {120 -- 125},
  year      = {2010},
  abstract  = {Die Erdbebensicherheit von Geb{\"a}uden aus Kalksandsteinmauerwerk ist aktuell nach DIN 4149 mit linearen Verfahren nachzuweisen. Dies f{\"u}hrt in der praktischen Anwendung zu großen Problemen, da selbst traditionell {\"u}bliche Grundrisse teilweise nicht mehr ohne zus{\"a}tzliche Maßnahmen nachweisbar sind. Zur L{\"o}sung dieser Problematik wurden von der deutschen Mauerwerksindustrie auf nationaler und europ{\"a}ischer Ebene Forschungsprojekte initiiert, deren Ergebnisse in Form von statisch nichtlinearen Verfahren Eingang in den Nationalen Anhang zur DIN EN 1998-1 [12] gefunden haben. Mit den Verfahren wird die Nachweissituation zuk{\"u}nftig grundlegend verbessert, da mit diesen die Tragwerksreserven wesentlich besser ausgenutzt werden k{\"o}nnen. Im Folgenden wird die Anwendung der Verfahren am Beispiel einer Reihenhauszeile aus Kalksandsteinmauerwerk demonstriert. Der Nachweis der Reihenh{\"a}user wurde im Rahmen einer Zustimmung im Einzelfall, die vom Bundesverband Kalksandsteinindustrie eV in Hannover koordiniert wurde, durch unabh{\"a}ngige Gutachter und die Bauaufsicht eingehend gepr{\"u}ft und f{\"u}r richtig befunden. Die Durchf{\"u}hrung des Nachweises erfolgte auf Grundlage eines an der RWTH Aachen entwickelten neuen Nachweiskonzeptes. Die baupraktische Anwendbarkeit und einfache Nachvollziehbarkeit dieses Konzepts ist durch eine softwaretechnische Umsetzung sichergestellt.},
  language  = {de}
}
@article{ButenwegFaeckeFehlingetal.2010,
  author    = {Butenweg, Christoph and F{\"a}cke, Andreas and Fehling, Ekkehard and Gellert, Christoph and Gierga, Michael and Meyer, Udo and R{\"u}tschlin, Andreas H. and St{\"u}rz, Jochen},
  title     = {Energieeffizient und erdbebensicher Bauen mit monolithischem Ziegelmauerwerk},
  series = {Mauerwerk : European journal of masonry},
  volume    = {14},
  journal   = {Mauerwerk : European journal of masonry},
  number    = {1},
  publisher = {Ernst \& Sohn},
  address   = {Berlin},
  issn      = {1432-3427},
  doi       = {10.1002/dama.201000456},
  pages     = {3 -- 9},
  year      = {2010},
  abstract  = {Moderne Bauwerke m{\"u}ssen heute eine hohe energetische Leistungsf{\"a}higkeit aufweisen und gleichzeitig alle einwirkenden Lasten sicher abtragen. Dies stellt insbesondere in Erdbebengebieten hohe Anforderungen an die verwendeten Baustoffe. Am baupraktischen Beispiel einer Doppelhaush{\"a}lfte wird demonstriert, dass die Symbiose aus energieeffizientem und gleichzeitig erdbebensicherem Bauen in der h{\"o}chsten deutschen Erdbebenzone mit monolithischem Ziegelmauerwerk gut realisierbar ist. Als Ziegelmauerwerk werden f{\"u}r die Außenw{\"a}nde w{\"a}rmetechnisch optimierte Hochlochziegel verwendet, die sowohl die Anforderungen der Energieeinsparverordnung 2009 als auch die Anforderungen an Mauerwerkbaustoffe nach den aktuellen Erdbebennormen erf{\"u}llen. Der Erdbebennachweis der Doppelhaush{\"a}lfte erfolgt mit einem nichtlinearen Nachweisverfahren, das f{\"u}r eine einfache praktische Anwendung programmtechnisch umgesetzt wurde. F{\"u}r den Nachweis wurden aus zyklischen Schubwandversuchen ermittelte Last-Verformungskurven verwendet. Das gesamte in Deutschland noch nicht normativ geregelte Nachweiskonzept wurde im Rahmen einer Zustimmung im Einzelfall gepr{\"u}ft und genehmigt.},
  language  = {de}
}
@article{Butenweg2010,
  author    = {Butenweg, Christoph},
  title     = {Bewertung der Erdbebensicherheit von bestehenden Bauwerken},
  series = {{\"O}sterreichische Ingenieur- und Architekten-Zeitschrift : {\"O}IAZ ; Zeitschr. d. {\"O}IAV / {\"O}sterreichischer Ingenieur- und Architekten-Verein},
  volume    = {155},
  journal   = {{\"O}sterreichische Ingenieur- und Architekten-Zeitschrift : {\"O}IAZ ; Zeitschr. d. {\"O}IAV / {\"O}sterreichischer Ingenieur- und Architekten-Verein},
  number    = {1-3 und 4-6},
  publisher = {{\"O}AIV},
  address   = {Wien},
  issn      = {0721-9415},
  pages     = {11 -- 17},
  year      = {2010},
  language  = {de}
}
@article{MeskourisButenwegGellert2009,
  author    = {Meskouris, Konstantin and Butenweg, Christoph and Gellert, Christoph},
  title     = {Iterativ verbessert : die RWTH Aachen entwickelt eine Software f{\"u}r einfache Nachweise von Mauerwerksbauten in Erdbebengebieten},
  series = {Deutsches Ingenieur-Blatt : Ingenieurwesen, Bautechnik, Umweltschutz ; Organ der deutschen Ingenieurkammern / Hrsg.: Bundes-Ingenieurkammer e.V.},
  journal   = {Deutsches Ingenieur-Blatt : Ingenieurwesen, Bautechnik, Umweltschutz ; Organ der deutschen Ingenieurkammern / Hrsg.: Bundes-Ingenieurkammer e.V.},
  number    = {Heft 5},
  publisher = {Rauh Medien GmbH},
  address   = {Wandlitz},
  issn      = {2365-192X},
  pages     = {31 -- 36},
  year      = {2009},
  language  = {de}
}
@article{HoltschoppenButenwegMeskouris2009,
  author    = {Holtschoppen, B. and Butenweg, Christoph and Meskouris, Konstantin},
  title     = {Erdbebensichere Auslegung von Industrieanlagen},
  series = {Der Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik},
  journal   = {Der Bauingenieur : die richtungsweisende Zeitschrift im Bauingenieurswesen ; offizielle Zeitschrift der VDI-Gesellschaft Bautechnik},
  number    = {M{\"a}rz},
  publisher = {VDI Fachmedien},
  address   = {D{\"u}sseldorf},
  issn      = {0005-6650},
  pages     = {S9 -- S14},
  year      = {2009},
  language  = {de}
}
@article{HoltschoppenButenwegMeskouris2009,
  author    = {Holtschoppen, Britta and Butenweg, Christoph and Meskouris, Konstantin},
  title     = {Seismic design of non-structural components in industrial facilities},
  series = {International journal of engineering under uncertainty},
  volume    = {Volume 1},
  journal   = {International journal of engineering under uncertainty},
  issn      = {0975-4806},
  pages     = {1 -- 13},
  year      = {2009},
  language  = {en}
}
@article{MeskourisButenwegGellert2009,
  author    = {Meskouris, Konstantin and Butenweg, Christoph and Gellert, Christoph},
  title     = {Einfache Nachweise : einige Beispiele f{\"u}r die Anwendung des Bemessungsprogramms der RWTH Aachen f{\"u}r den Nachweis von Mauerwerksbauten in Erdbebengebieten},
  series = {Deutsches Ingenieur-Blatt : Ingenieurwesen, Bautechnik, Umweltschutz ; Organ der deutschen Ingenieurkammern / Hrsg.: Bundes-Ingenieurkammer e.V.},
  journal   = {Deutsches Ingenieur-Blatt : Ingenieurwesen, Bautechnik, Umweltschutz ; Organ der deutschen Ingenieurkammern / Hrsg.: Bundes-Ingenieurkammer e.V.},
  number    = {Heft 6},
  publisher = {Rauh Medien GmbH},
  address   = {Wandlitz},
  issn      = {0946-2422},
  pages     = {26 -- 29},
  year      = {2009},
  language  = {de}
}
@inproceedings{GoemmelKobNiendorfetal.2009,
  author    = {G{\"o}mmel, Andreas and Kob, Malte and Niendorf, Thoralf and Butenweg, Christoph},
  title     = {An approach for numerical calculation of glottal flow during glottal closure},
  series = {Proceedings / NAG/DAGA 2009, International Conference on Acoustics : Rotterdam, 23 - 26 March 2009 ; [including the 35th German Annual Conference on Acoustics (DAGA)] / [organisers: Acoustical Society of the Netherlands (NAG); German Acoustical Society (DEGA) ...]. Ed. by Marinus M. Boone},
  booktitle = {Proceedings / NAG/DAGA 2009, International Conference on Acoustics : Rotterdam, 23 - 26 March 2009 ; [including the 35th German Annual Conference on Acoustics (DAGA)] / [organisers: Acoustical Society of the Netherlands (NAG); German Acoustical Society (DEGA) ...]. Ed. by Marinus M. Boone},
  publisher = {DEGA},
  address   = {Berlin},
  organization    = {NAG DAGA <2009, Rotterdam>},
  isbn      = {978-3-9808659-6-8},
  pages     = {1722 -- 1725},
  year      = {2009},
  language  = {en}
}
@inproceedings{GellertButenweg2009,
  author    = {Gellert, Christoph and Butenweg, Christoph},
  title     = {Nichtlinearer Erdbebennachweis von Mauerwerksbauten},
  series = {Erdbeben und Mauerwerk : 11. D-A-CH-Tagung 2009 ; [10./11. September 2009 in Z{\"u}rich] / SGEB, Swiss Society for Earthquake Engineering and Structural Dynamics; Schweizerischer Ingenieur- und Architektenverein, Fachgruppe f{\"u}r Br{\"u}ckenbau und Hochbau. [Hrsg. Dazio, Alessandro ...]},
  booktitle = {Erdbeben und Mauerwerk : 11. D-A-CH-Tagung 2009 ; [10./11. September 2009 in Z{\"u}rich] / SGEB, Swiss Society for Earthquake Engineering and Structural Dynamics; Schweizerischer Ingenieur- und Architektenverein, Fachgruppe f{\"u}r Br{\"u}ckenbau und Hochbau. [Hrsg. Dazio, Alessandro ...]},
  publisher = {SIA},
  address   = {Z{\"u}rich},
  organization    = {D-A-C-H Tagung <11, 2009, Z{\"u}rich>},
  isbn      = {978-3-03732-021-1},
  pages     = {125 -- 132},
  year      = {2009},
  language  = {de}
}
@inproceedings{MeskourisHollerButenwegetal.2009,
  author    = {Meskouris, Konstantin and Holler, Stefan and Butenweg, Christoph and Meiners, Daniel},
  title     = {A multiphase model with hypoplastic formulation of the solid phase and its application to earthquake engineering problems},
  series = {Computational structural dynamics and earthquake engineering / ed. by Manolis Papadrakakis .... (Structures and infrastructures series ; 2)},
  booktitle = {Computational structural dynamics and earthquake engineering / ed. by Manolis Papadrakakis .... (Structures and infrastructures series ; 2)},
  publisher = {CRC Press},
  address   = {Boca Raton, Fla. [u.a.]},
  isbn      = {978-0-415-45261-8},
  doi       = {10.1201/9780203881637.ch19},
  pages     = {293 -- 308},
  year      = {2009},
  language  = {en}
}
@incollection{ButenwegGellert2009,
  author    = {Butenweg, Christoph and Gellert, Christoph},
  title     = {Erdbebenberechnung von Mauerwerksbauten nach DIN EN 1998-1 (12.2010)},
  series = {Mauerwerksbau-Praxis / Schubert; Schneider; Schoch (Hrsg.)},
  booktitle = {Mauerwerksbau-Praxis / Schubert; Schneider; Schoch (Hrsg.)},
  publisher = {Bauwerk},
  address   = {Berlin},
  isbn      = {978-3-89932-217-0},
  pages     = {299 -- 343},
  year      = {2009},
  language  = {de}
}
@misc{ButenwegGellertReindletal.2009,
  author    = {Butenweg, Christoph and Gellert, Christoph and Reindl, Lukas and Meskouris, Konstantin},
  title     = {A nonlinear method for the seismic safety verification of masonry buildings},
  publisher = {National Technical University of Athens},
  address   = {Athen},
  year      = {2009},
  abstract  = {In order for traditional masonry to stay a competitive building material in seismically active regions there is an urgent demand for modern, deformation-based verification procedures which exploit the nonlinear load bearing reserves. The Capacity Spectrum Method (CSM) is a widely accepted design approach in the field of reinforced concrete and steel construction. It compares the seismic action with the load-bearing capacity of the building considering nonlinear material behavior with its post-peak capacity. The bearing capacity of the building is calculated iteratively using single wall capacity curves. This paper presents a new approach for the bilinear approximation of single wall capacity curves in the style of EC6/EC8 respectively FEMA 306/FEMA 356 based on recent shear wall test results of the European Collective-Research Project "ESECMaSE". The application of the CSM to masonry structures by using bilinear approximations of capacity curves as input is demonstrated on the example of a typical German residential home.},
  language  = {en}
}
@article{FrauenrathHezelHeinrichsetal.2009,
  author    = {Frauenrath, Tobias and Hezel, Fabian and Heinrichs, Uwe and Kozerke, Sebastian and Utting, Jane and Kob, Malte and Butenweg, Christoph and Boesiger, Peter and Niendorf, Thoralf},
  title     = {Feasibility of Cardiac Gating Free of Interference With Electro-Magnetic Fields at 1.5 Tesla, 3.0 Tesla and 7.0 Tesla Using an MR-Stethoscope},
  series = {Investigative Radiology},
  volume    = {44},
  journal   = {Investigative Radiology},
  number    = {9},
  publisher = {Lippincott Williams \& Wilkins ; (via Ovid)},
  address   = {Philadelphia, Pa},
  issn      = {1536-0210 (online)},
  doi       = {10.1097/RLI.0b013e3181b4c15e},
  pages     = {539 -- 547},
  year      = {2009},
  language  = {en}
}
@incollection{MeskourisButenweg2008,
  author    = {Meskouris, Konstantin and Butenweg, Christoph},
  title     = {Erdbebensichere Auslegung von Bauwerken nach DIN 4149:2005},
  series = {Betonkalender 2008: Konstruktiver Wasserbau, erdbebensicheres Bauen. Band 2},
  booktitle = {Betonkalender 2008: Konstruktiver Wasserbau, erdbebensicheres Bauen. Band 2},
  publisher = {Ernst \& Sohn},
  address   = {Berlin},
  isbn      = {978-3-433-01839-2 (Print) ; 978-3-433-01854-5 (E-Book)},
  doi       = {10.1002/9783433600702.ch5},
  pages     = {1 -- 54},
  year      = {2008},
  language  = {de}
}
@article{ButenwegGellertKranzler2008,
  author    = {Butenweg, Christoph and Gellert, Christoph and Kranzler, Thomas},
  title     = {Pseudo-dynamische Versuche an Reihenmittelh{\"a}usern - Vergleich mit aktuellen Berechnungsans{\"a}tzen},
  series = {Mauerwerk : European journal of masonry},
  volume    = {Volume 12},
  journal   = {Mauerwerk : European journal of masonry},
  number    = {Issue 6},
  issn      = {1437-1022 (E-Journal); 1432-3427 (Print)},
  doi       = {10.1002/dama.200800397},
  pages     = {315 -- 326},
  year      = {2008},
  language  = {de}
}
@inproceedings{ButenwegGellertReindl2008,
  author    = {Butenweg, Christoph and Gellert, Christoph and Reindl, Lukas},
  title     = {Capacity design of masonry buildings under cyclic loading},
  series = {Seismic Risk : Earthquakes in North-Western Europe ; international colloquium ; Li{\`e}ge on 11 and 12 September 2008 / Belgian Seismic Group (BeSeiG). Ed.: T. Camlebeeck ...},
  booktitle = {Seismic Risk : Earthquakes in North-Western Europe ; international colloquium ; Li{\`e}ge on 11 and 12 September 2008 / Belgian Seismic Group (BeSeiG). Ed.: T. Camlebeeck ...},
  publisher = {Editions de l'Universit{\´e} de Li{\`e}ge},
  address   = {Li{\`e}ge},
  organization    = {Belgian Seismic Group},
  isbn      = {978-2-87456-063-7},
  pages     = {201 -- 208},
  year      = {2008},
  language  = {en}
}
@inproceedings{ButenwegGellert2008,
  author    = {Butenweg, Christoph and Gellert, Christoph},
  title     = {Displacement based design of masonry structures},
  series = {Proceedings of the 14th International Brick and Block Masonry Conference : (Incorporating the 8th Australasian Masonry Conference) : Sydney, Australia, 13.-20. February 2008 / ed. Mark Masia ...},
  booktitle = {Proceedings of the 14th International Brick and Block Masonry Conference : (Incorporating the 8th Australasian Masonry Conference) : Sydney, Australia, 13.-20. February 2008 / ed. Mark Masia ...},
  publisher = {University of Newcastle},
  address   = {Callaghan},
  organization    = {International Brick and Block Masonry Conference <14, 2008, Sydney>},
  isbn      = {978-19-2070-1-92-5},
  pages     = {1 -- 10},
  year      = {2008},
  language  = {en}
}
@inproceedings{ButenwegGellertMeskouris2008,
  author    = {Butenweg, Christoph and Gellert, Christoph and Meskouris, Konstantin},
  title     = {Ein neuer Ansatz zum Nachweis von Mauerwerksbauten},
  series = {Berichte der Fachtagung Baustatik - Baupraxis 10 : am 17. und 18. M{\"a}rz 2008 in Karlsruhe / Hrsg.: Werner Wagner. Institut f{\"u}r Baustatik, Universit{\"a}t Karlsruhe (TH)},
  booktitle = {Berichte der Fachtagung Baustatik - Baupraxis 10 : am 17. und 18. M{\"a}rz 2008 in Karlsruhe / Hrsg.: Werner Wagner. Institut f{\"u}r Baustatik, Universit{\"a}t Karlsruhe (TH)},
  publisher = {Inst. f{\"u}r Baustatik, Univ. Karlsruhe (TH)},
  address   = {Karlsruhe},
  organization    = {Fachtagung Baustatik - Baupraxis <10, 2008, Karlsruhe>},
  isbn      = {978-3-935322-14-0},
  pages     = {103 -- 116},
  year      = {2008},
  language  = {de}
}
@article{BaumgartnerFidlerWethetal.2008,
  author    = {Baumgartner, Werner and Fidler, Florian and Weth, Agnes and Habbecke, Martin and Jakob, Peter and Butenweg, Christoph and B{\"o}hme, Wolfgang},
  title     = {Investigating the locomotion of the sandfish in desert sand using NMR-Imaging},
  series = {PLOS ONE},
  volume    = {3},
  journal   = {PLOS ONE},
  number    = {10},
  publisher = {Plos},
  address   = {San Francisco, California, US},
  issn      = {1932-6203},
  doi       = {10.1371/journal.pone.0003309},
  pages     = {e3309},
  year      = {2008},
  abstract  = {The sandfish (Scincus scincus) is a lizard having the remarkable ability to move through desert sand for significant distances. It is well adapted to living in loose sand by virtue of a combination of morphological and behavioural specializations. We investigated the bodyform of the sandfish using 3D-laserscanning and explored its locomotion in loose desert sand using fast nuclear magnetic resonance (NMR) imaging. The sandfish exhibits an in-plane meandering motion with a frequency of about 3 Hz and an amplitude of about half its body length accompanied by swimming-like (or trotting) movements of its limbs. No torsion of the body was observed, a movement required for a digging-behaviour. Simple calculations based on the Janssen model for granular material related to our findings on bodyform and locomotor behaviour render a local decompaction of the sand surrounding the moving sandfish very likely. Thus the sand locally behaves as a viscous fluid and not as a solid material. In this fluidised sand the sandfish is able to "swim" using its limbs.},
  language  = {en}
}