TY  - JOUR
A1  - Klein, Michel
A1  - Butenweg, Christoph
A1  - Klinkel, Sven
T1  - The Influence of Soil-Structure-Interaction on the Fatigue Analysis in the Foundation Design of Onshore Wind Turbines
JF  - Procedia Engineering
Y1  - 2017
U6  - http://dx.doi.org/10.1016/j.proeng.2017.09.325
SN  - 1877-7058
VL  - 199
SP  - 3218
EP  - 3223
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Butenweg, Christoph
A1  - Rosin, Julia
A1  - Holler, Stefan
T1  - Analysis of cylindrical granular material silos under seismic excitation
JF  - Buildings
N2  - Silos generally work as storage structures between supply and demand for various goods, and their structural safety has long been of interest to the civil engineering profession. This is especially true for dynamically loaded silos, e.g., in case of seismic excitation. Particularly thin-walled cylindrical silos are highly vulnerable to seismic induced pressures, which can cause critical buckling phenomena of the silo shell. The analysis of silos can be carried out in two different ways. In the first, the seismic loading is modeled through statically equivalent loads acting on the shell. Alternatively, a time history analysis might be carried out, in which nonlinear phenomena due to the filling as well as the interaction between the shell and the granular material are taken into account. The paper presents a comparison of these approaches. The model used for the nonlinear time history analysis considers the granular material by means of the intergranular strain approach for hypoplasticity theory. The interaction effects between the granular material and the shell is represented by contact elements. Additionally, soil–structure interaction effects are taken into account.
KW  - granular silo
KW  - earthquake engineering
KW  - hypoplasticity
KW  - nonlinear transient analyses
Y1  - 2017
U6  - http://dx.doi.org/10.3390/buildings7030061
SN  - 2075-5309
VL  - 7
IS  - 3
SP  - 1
EP  - 12
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Butenweg, Christoph
T1  - Die neue Erdbebenfibel. Neue Hilfsmittel für die Leichtbetonindustrie
JF  - Tagungsband 61. Ulmer Beton Tage 2017
Y1  - 2017
ER  - 
TY  - JOUR
A1  - Giresini, Linda
A1  - Sassu, Mauro
A1  - Butenweg, Christoph
A1  - Alecci, Valerio
A1  - De Stefano, Mario
T1  - Vault macro-element with equivalent trusses in global seismic analyses
JF  - Earthquakes and Structures
N2  - This paper proposes a quick and simplified method to describe masonry vaults in global seismic analyses of buildings. An equivalent macro-element constituted by a set of six trusses, two for each transverse, longitudinal and diagonal direction, is introduced. The equivalent trusses, whose stiffness is calculated by fully modeled vaults of different geometry, mechanical properties and boundary conditions, simulate the vault in both global analysis and local analysis, such as kinematic or rocking approaches. A parametric study was carried out to investigate the influence of geometrical characteristics and mechanical features on the equivalent stiffness values. The method was numerically validated by performing modal and transient analysis on a three naves-church in the elastic range. Vibration modes and displacement time-histories were compared showing satisfying agreement between the complete and the simplified models. This procedure is particularly useful in engineering practice because it allows to assess, in a simplified way, the effectiveness of strengthening interventions for reducing horizontal relative displacements between vault supports.
KW  - vault
KW  - macro-element
KW  - equivalent stiffness
KW  - truss
KW  - churches
Y1  - 2017
U6  - http://dx.doi.org/10.12989/eas.2017.12.4.409
SN  - 2092-7614 (Print)
SN  - 2092-7622 (Online)
VL  - 12
IS  - 4
SP  - 409
EP  - 423
PB  - Techno-Press
CY  - Taejŏn
ER  -