TY  - JOUR
A1  - Edip, K.
A1  - Sesov, V.
A1  - Butenweg, Christoph
A1  - Bojadjieva, J.
T1  - Development of coupled numerical model for simulation of multiphase soil
JF  - Computers and Geotechnics
N2  - In this paper, a coupled multiphase model considering both non-linearities of water retention curves and solid state modeling is proposed. The solid displacements and the pressures of both water and air phases are unknowns of the proposed model. The finite element method is used to solve the governing differential equations. The proposed method is demonstrated through simulation of seepage test and partially consolidation problem. Then, implementation of the model is done by using hypoplasticity for the solid phase and analyzing the fully saturated triaxial experiments. In integration of the constitutive law error controlling is improved and comparisons done accordingly. In this work, the advantages and limitations of the numerical model are discussed.
Y1  - 2018
U6  - http://dx.doi.org/10.1016/j.compgeo.2017.08.016
SN  - 0266-352X
VL  - 96
SP  - 118
EP  - 131
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Michel, Philipp
A1  - Butenweg, Christoph
A1  - Kinkel, Sven
T1  - Pile-grid foundations of onshore wind turbines considering soil-structure-interaction under seismic loading
JF  - Soil Dynamics and Earthquake Engineering
N2  - In recent years, many onshore wind turbines are erected in seismic active regions and on soils with poor load bearing capacity, where pile grids are inevitable to transfer the loads into the ground. In this contribution, a realistic multi pile grid is designed to analyze the dynamics of a wind turbine tower including frequency dependent soil-structure-interaction. It turns out that different foundations on varying soil configurations heavily influence the vibration response. While the vibration amplitude is mostly attenuated, certain unfavorable combinations of structure and soil parameters lead to amplification in the range of the system's natural frequencies. This testifies the need for overall dynamic analysis in the assessment of the dynamic stability and the holistic frequency tuning of the turbines.
Y1  - 2018
U6  - http://dx.doi.org/10.1016/j.soildyn.2018.03.009
SN  - 0267-7261
VL  - 109
SP  - 299
EP  - 311
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Rosin, Julia
A1  - Butenweg, Christoph
A1  - Cacciatore, Pamela
A1  - Boesen, Niklas
T1  - Investigation of the seismic performance of modern masonry buildings during the Emilia Romagna  earthquake  series
T1  - Untersuchungen des seismischen Verhaltens von  modernen Mauerwerksbauten während der  Erdbebenserie in der Emilia Romagna
JF  - Mauerwerk
N2  - The article presents the investigation of the seismic behaviour of a modern URM building located in the municipality of Finale Emilia in province of Modena, Northern Italy. The building is situated in the centre of the series of the 2012 Northern Italy earthquakes and has not suffered any damage during the earthquake series in 2012. The observed earthquake resistance of the building is compared with predicted resistances based on linear and nonlinear design approaches according to Eurocode. Furthermore, probabilistic analyses based on nonlinear calculation models taking into account scattering of the most relevant input parameters are carried out to identify their influence to the results and to derive fragility curves.
Y1  - 2018
U6  - http://dx.doi.org/10.1002/dama.201800013
SN  - 1437-1022
VL  - 22
IS  - 4
SP  - 238
EP  - 250
PB  - Ernst & Sohn
CY  - Berlin
ER  -