TY  - CHAP
A1  - Jaouadi, Zouhour
A1  - Lahmer, Tom
ED  - Gürlebeck, Klaus
ED  - Lahmer, Tom
T1  - Topology optimization of structures subjected to multiple load cases by introducing the Epsilon constraint method
T2  - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar
N2  - A topology optimization method has been developed for structures subjected to multiple load cases (Example of a bridge pier subjected to wind loads, traffic, superstructure...). We formulate the problem as a multi-criterial optimization problem, where the compliance is computed for each load case. Then, the Epsilon constraint method (method proposed by Chankong and Haimes, 1971) is adapted. The strategy of this method is based on the concept of minimizing the maximum compliance resulting from the critical load case while the other remaining compliances are considered in the constraints. In each iteration, the compliances of all load cases are computed and only the maximum one is minimized. The topology optimization process is switching from one load to another according to the variation of the resulting compliance. In this work we will motivate and explain the proposed methodology and provide some numerical examples.
KW  - Angewandte Informatik
KW  - Angewandte Mathematik
KW  - Building Information Modeling
KW  - Computerunterstütztes Verfahren
KW  - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28042
SN  - 1611-4086
ER  - 
TY  - THES
A1  - Alkam, Feras
T1  - Vibration-based Monitoring of Concrete Catenary Poles using Bayesian Inference
N2  - This work presents a robust status monitoring approach for detecting damage in cantilever structures based on logistic functions. Also, a stochastic damage identification approach based on changes of eigenfrequencies is proposed. The proposed algorithms are verified using catenary poles of electrified railways track. The proposed damage features overcome the limitation of frequency-based damage identification methods available in the literature, which are valid to detect damage in structures to Level 1 only. Changes in eigenfrequencies of cantilever structures are enough to identify possible local damage at Level 3, i.e., to cover damage detection, localization, and quantification. The proposed algorithms identified the damage with relatively small errors, even at a high noise level.
KW  - Parameteridentifikation
KW  - Bayesian Inference, Uncertainty Quantification
KW  - Inverse Problems
KW  - Damage Identification
KW  - Concrete catenary pole
KW  - SHM
KW  - Inverse Probleme
KW  - Bayes’schen Inferenz
KW  - Unschärfequantifizierung
KW  - Schadenerkennung
KW  - Oberleitungsmasten
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20210526-44338
UR  - https://asw-verlage.de/katalog/vibration_based_monitoring_of_co-2363.html
VL  - 2021
PB  - Bauhaus-Universitätsverlag
CY  - Weimar
ER  -