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Numerical Simulation of Substructure Shake Table Testing for Base-Isolated Structure Using Model-Based Integration Algorithm
https://orcid.org/http://orcid.org/0000-0003-3597-1504
https://orcid.org/http://orcid.org/0000-0001-7975-8268
https://orcid.org/http://orcid.org/0000-0003-3246-1330
Base isolation is an effective method of reducing the seismic responses of structures. As a promising experimental measure, substructure shake table testing (SSTT) can be used to investigate the seismic performance of base-isolated structures. Model-based integration algorithms have the advantages of explicit formulation and unconditional stability, and thus they are very suitable for SSTT. In this study, the SSTT using a family of generalized CR (GCR) algorithms for the base-isolated structures is numerically studied. Firstly, time history analyses of a six-story base-isolated structure are conducted and compared with the corresponding non-isolated structure. Then, the SSTT approach using the GCR algorithms is proposed for the base-isolated structures. The numerical simulation of a series of SSTTs with different time steps, integration coefficients and time lags are finally conducted. The results indicate that the GCR algorithms with relative large time step still have excellent accuracy. The SSTT results of using the subfamily of κ1 = 1 are less accurate than the subfamily of κ1 = 1/2. In addition, the time lag has obvious adverse effect on the SSTT results. There is an instable tendency of the SSTT results as the time lag increases.
Numerical Simulation of Substructure Shake Table Testing for Base-Isolated Structure Using Model-Based Integration Algorithm
https://orcid.org/http://orcid.org/0000-0003-3597-1504
https://orcid.org/http://orcid.org/0000-0001-7975-8268
https://orcid.org/http://orcid.org/0000-0003-3246-1330
Base isolation is an effective method of reducing the seismic responses of structures. As a promising experimental measure, substructure shake table testing (SSTT) can be used to investigate the seismic performance of base-isolated structures. Model-based integration algorithms have the advantages of explicit formulation and unconditional stability, and thus they are very suitable for SSTT. In this study, the SSTT using a family of generalized CR (GCR) algorithms for the base-isolated structures is numerically studied. Firstly, time history analyses of a six-story base-isolated structure are conducted and compared with the corresponding non-isolated structure. Then, the SSTT approach using the GCR algorithms is proposed for the base-isolated structures. The numerical simulation of a series of SSTTs with different time steps, integration coefficients and time lags are finally conducted. The results indicate that the GCR algorithms with relative large time step still have excellent accuracy. The SSTT results of using the subfamily of κ1 = 1 are less accurate than the subfamily of κ1 = 1/2. In addition, the time lag has obvious adverse effect on the SSTT results. There is an instable tendency of the SSTT results as the time lag increases.
Numerical Simulation of Substructure Shake Table Testing for Base-Isolated Structure Using Model-Based Integration Algorithm
https://orcid.org/http://orcid.org/0000-0003-3597-1504
https://orcid.org/http://orcid.org/0000-0001-7975-8268
https://orcid.org/http://orcid.org/0000-0003-3246-1330
Base isolation is an effective method of reducing the seismic responses of structures. As a promising experimental measure, substructure shake table testing (SSTT) can be used to investigate the seismic performance of base-isolated structures. Model-based integration algorithms have the advantages of explicit formulation and unconditional stability, and thus they are very suitable for SSTT. In this study, the SSTT using a family of generalized CR (GCR) algorithms for the base-isolated structures is numerically studied. Firstly, time history analyses of a six-story base-isolated structure are conducted and compared with the corresponding non-isolated structure. Then, the SSTT approach using the GCR algorithms is proposed for the base-isolated structures. The numerical simulation of a series of SSTTs with different time steps, integration coefficients and time lags are finally conducted. The results indicate that the GCR algorithms with relative large time step still have excellent accuracy. The SSTT results of using the subfamily of κ1 = 1 are less accurate than the subfamily of κ1 = 1/2. In addition, the time lag has obvious adverse effect on the SSTT results. There is an instable tendency of the SSTT results as the time lag increases.
Numerical Simulation of Substructure Shake Table Testing for Base-Isolated Structure Using Model-Based Integration Algorithm
Lecture Notes in Civil Engineering
Guo, Wei (editor) / Qian, Kai (editor) / Fu, Bo (author) / Zhang, Futai (author) / Chen, Jin (author)
International Conference on Green Building, Civil Engineering and Smart City ; 2022 ; Guilin, China
2022-09-08
9 pages
Article/Chapter (Book)
Electronic Resource
English
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