TY - CHAP
A1 - Ahmad, Sofyan
A1 - Zabel, Volkmar
A1 - Könke, Carsten
T1 - WAVELET-BASED INDICATORS FOR RESPONSE SURFACE MODELS IN DAMAGE IDENTIFICATION OF STRUCTURES
T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 04 - 06 2012, Bauhaus-University Weimar
N2 - In this paper, wavelet energy damage indicator is used in response surface methodology to identify the damage in simulated filler beam railway bridge. The approximate model is addressed to include the operational and surrounding condition in the assessment. The procedure is split into two stages, the training and detecting phase. During training phase, a so-called response surface is built from training data using polynomial regression and radial basis function approximation approaches. The response surface is used to detect the damage in structure during detection phase. The results show that the response surface model is able to detect moderate damage in one of bridge supports while the temperatures and train velocities are varied.
KW - Angewandte Mathematik
KW - Computerunterstütztes Verfahren
KW - Angewandte Informatik
Y1 - 2012
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170306-27588
SN - 1611-4086
ER -
TY - JOUR
A1 - Lahmer, Tom
A1 - Nguyen-Tuan, Long
A1 - Könke, Carsten
A1 - Bettzieche, Volker
T1 - Thermo-hydro-mechanische 3-D-Simulation von Staumauern‐Modellierung und Validierung
JF - WASSERWIRTSCHAFT
N2 - Thermo-hydro-mechanische 3-D-Simulation von Staumauern‐Modellierung und Validierung
KW - Angewandte Mathematik
KW - Stochastik
KW - Strukturmechanik
Y1 - 2016
SP - 27
EP - 30
ER -
TY - CHAP
A1 - Könke, Carsten
A1 - Eckardt, Stefan
A1 - Häfner, Stefan
T1 - Spatial and temporal multiscale simulations of damage processes for concrete
N2 - Spatial and temporal multiscale simulations of damage processes for concrete
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2006
ER -
TY - CHAP
A1 - Schrader, Kai
A1 - Könke, Carsten
ED - Gürlebeck, Klaus
ED - Könke, Carsten
T1 - SPARSE APPROXIMATE COMPUTATION OF SADDLE POINT PROBLEMS ARISING FROM FETI-DP DISCRETIZATION
N2 - The numerical simulation of microstructure models in 3D requires, due to enormous d.o.f., significant resources of memory as well as parallel computational power. Compared to homogeneous materials, the material hetrogeneity on microscale induced by different material phases demand for adequate computational methods for discretization and solution process of the resulting highly nonlinear problem. To enable an efficient/scalable solution process of the linearized equation systems the heterogeneous FE problem will be described by a FETI-DP (Finite Element Tearing and Interconnecting - Dual Primal) discretization. The fundamental FETI-DP equation can be solved by a number of different approaches. In our approach the FETI-DP problem will be reformulated as Saddle Point system, by eliminating the primal and Lagrangian variables. For the reduced Saddle Point system, only defined by interior and dual variables, special Uzawa algorithms can be adapted for iteratively solving the FETI-DP saddle-point equation system (FETI-DP SPE). A conjugate gradient version of the Uzawa algorithm will be shown as well as some numerical tests regarding to FETI-DP discretization of small examples using the presented solution technique. Furthermore the inversion of the interior-dual Schur complement operator can be approximated using different techniques building an adequate preconditioning matrix and therewith leading to substantial gains in computing time efficiency.
KW - Angewandte Informatik
KW - Angewandte Mathematik
KW - Architektur
KW - Computerunterstütztes Verfahren
KW - Computer Science Models in Engineering; Multiscale and Multiphysical Models; Scientific Computing
Y1 - 2010
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28874
UR - http://euklid.bauing.uni-weimar.de/ikm2009/paper.html
SN - 1611-4086
ER -
TY - CHAP
A1 - Eckardt, Stefan
A1 - Häfner, Stefan
A1 - Könke, Carsten
T1 - Simulation of the fracture behaviour of concrete using continuum damage models at the mesoscale
N2 - Simulation of the fracture behaviour of concrete using continuum damage models at the mesoscale
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2004
ER -
TY - CHAP
A1 - Unger, Jörg F.
A1 - Könke, Carsten
T1 - Simulation of concrete using the extended finite element method
N2 - Simulation of concrete using the extended finite element method
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2006
ER -
TY - JOUR
A1 - Nasser, Mourad
A1 - Schwedler, Michael
A1 - Wuttke, Frank
A1 - Könke, Carsten
T1 - Seismic analysis of structural response using simplified soil-structure interaction models
JF - Bauingenieur, D-A-CH-Mitteilungsblatt
N2 - Seismic analysis of structural response using simplified soil-structure interaction models
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2010
ER -
TY - CHAP
A1 - Könke, Carsten
A1 - Eckardt, Stefan
A1 - Häfner, Stefan
A1 - Luther, Torsten
A1 - Unger, Jörg F.
T1 - Schädigungs- und Verbundmodellierung für Stahlbetontragwerke
N2 - Schädigungs- und Verbundmodellierung für Stahlbetontragwerke
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2005
ER -
TY - CHAP
A1 - Könke, Carsten
A1 - Petryna, Y.
A1 - Singh, Ripudaman
T1 - Risk assessment for damage tolerant structures
N2 - Risk assessment for damage tolerant structures
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2005
ER -
TY - CHAP
A1 - Hatahet, Tareq
A1 - Könke, Carsten
T1 - Rational Framework for Probability of Collapse in Buildings
N2 - Rational Framework for Probability of Collapse in Buildings
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2014
ER -
TY - JOUR
A1 - Luther, Torsten
A1 - Könke, Carsten
T1 - Polycrystal models for the analysis of intergranular crack growth in metallic materials
JF - Engineering Fracture Mechanics
N2 - Polycrystal models for the analysis of intergranular crack growth in metallic materials
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2009
SP - 2332
EP - 2343
ER -
TY - INPR
A1 - Radmard Rahmani, Hamid
A1 - Könke, Carsten
T1 - Passive Control of Tall Buildings Using Distributed Multiple Tuned Mass Dampers
N2 - The vibration control of the tall building during earthquake excitations is a challenging task due to their complex seismic behavior. This paper investigates the optimum placement and properties of the Tuned Mass Dampers (TMDs) in tall buildings, which are employed to control the vibrations during earthquakes. An algorithm was developed to spend a limited mass either in a single TMD or in multiple TMDs and distribute them optimally over the height of the building. The Non-dominated Sorting Genetic Algorithm (NSGA – II) method was improved by adding multi-variant genetic operators and utilized to simultaneously study the optimum design parameters of the TMDs and the optimum placement. The results showed that under earthquake excitations with noticeable amplitude in higher modes, distributing TMDs over the height of the building is more effective in mitigating the vibrations compared to the use of a single TMD system. From the optimization, it was observed that the locations of the TMDs were related to the stories corresponding to the maximum modal displacements in the lower modes and the stories corresponding to the maximum modal displacements in the modes which were highly activated by the earthquake excitations. It was also noted that the frequency content of the earthquake has significant influence on the optimum location of the TMDs.
KW - Schwingungsdämpfer
KW - Hochbau
KW - tall buildings
KW - passive control
KW - genetic algorithm
KW - tuned mass dampers
Y1 - 2019
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20190311-38597
UR - https://www.researchgate.net/publication/330508976_Seismic_Control_of_Tall_Buildings_Using_Distributed_Multiple_Tuned_Mass_Dampers
ER -
TY - CHAP
A1 - Unger, Jörg F.
A1 - Könke, Carsten
ED - Gürlebeck, Klaus
ED - Könke, Carsten
T1 - PARAMETER IDENTIFICATION OF MESOSCALE MODELS FROM MACROSCOPIC TESTS USING BAYESIAN NEURAL NETWORKS
N2 - In this paper, a parameter identification procedure using Bayesian neural networks is proposed. Based on a training set of numerical simulations, where the material parameters are simulated in a predefined range using Latin Hypercube sampling, a Bayesian neural network, which has been extended to describe the noise of multiple outputs using a full covariance matrix, is trained to approximate the inverse relation from the experiment (displacements, forces etc.) to the material parameters. The method offers not only the possibility to determine the parameters itself, but also the accuracy of the estimate and the correlation between these parameters. As a result, a set of experiments can be designed to calibrate a numerical model.
KW - Angewandte Informatik
KW - Angewandte Mathematik
KW - Architektur
KW - Computerunterstütztes Verfahren
KW - Computer Science Models in Engineering; Multiscale and Multiphysical Models; Scientific Computing
Y1 - 2010
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28984
UR - http://euklid.bauing.uni-weimar.de/ikm2009/paper.html
SN - 1611-4086
ER -
TY - JOUR
A1 - Lahmer, Tom
A1 - Könke, Carsten
A1 - Bettzieche, Volker
T1 - Optimale Positionierung von Messeinrichtungen an Staumauern zur Bauwerksüberwachung
JF - WASSERWIRTSCHAFT
N2 - Optimale Positionierung von Messeinrichtungen an Staumauern zur Bauwerksüberwachung
KW - Angewandte Mathematik
KW - Stochastik
KW - Strukturmechanik
Y1 - 2010
SP - 16
EP - 16
ER -
TY - JOUR
A1 - Lahmer, Tom
A1 - Könke, Carsten
A1 - Bettzieche, Volker
T1 - Optimal positioning of sensors for the monitoring of water dams
JF - WASSERWIRTSCHAFT
N2 - Optimal positioning of sensors for the monitoring of water dams
KW - Angewandte Mathematik
KW - Stochastik
KW - Strukturmechanik
Y1 - 2010
SP - 16
EP - 19
ER -
TY - JOUR
A1 - Bruhin, R.
A1 - Stock, U.A.
A1 - Drücker, J.-P.
A1 - Azhari, T.
A1 - Wippermann, J.
A1 - Albes, J.M.
A1 - Hintze, D.
A1 - Eckardt, Stefan
A1 - Könke, Carsten
A1 - Wahlers, T.
T1 - Numerical simulation techniques to study the structural response of the human chest following median sternotomy
JF - The Annals of Thoracic Surgery
N2 - Numerical simulation techniques to study the structural response of the human chest following median sternotomy
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2005
SP - 623
EP - 630
ER -
TY - CHAP
A1 - Unger, Jörg F.
A1 - Eckardt, Stefan
A1 - Könke, Carsten
T1 - Numerical Models for the simulation of concrete on the mesoscale
N2 - Numerical Models for the simulation of concrete on the mesoscale
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2005
ER -
TY - JOUR
A1 - Nguyen-Tuan, Long
A1 - Könke, Carsten
A1 - Bettzieche, Volker
A1 - Lahmer, Tom
T1 - Numerical modeling and validation for 3D coupled-nonlinear thermo-hydro-mechanical problems in masonry dams
JF - Computers & Structures
N2 - Numerical modeling and validation for 3D coupled-nonlinear thermo-hydro-mechanical problems in masonry dams
KW - Angewandte Mathematik
KW - Stochastik
KW - Strukturmechanik
Y1 - 2017
SP - 143
EP - 154
ER -
TY - CHAP
A1 - Unger, Jörg F.
A1 - Könke, Carsten
T1 - Neural networks as material models within a multiscale approach
N2 - Neural networks as material models within a multiscale approach
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2007
ER -
TY - JOUR
A1 - Könke, Carsten
A1 - Eckardt, Stefan
A1 - Häfner, Stefan
A1 - Luther, Torsten
A1 - Unger, Jörg F.
T1 - Multiscale simulation methods in damage prediction of brittle and ductile materials
JF - International Journal for Multiscale Computational Engineering
N2 - Multiscale simulation methods in damage prediction of brittle and ductile materials
KW - Angewandte Mathematik
KW - Strukturmechanik
Y1 - 2010
SP - 17
EP - 36
ER -