Probabilistic seismic performance evaluation of composite frames with concrete-filled steel tube columns and buckling-restrained braces

• Autorzy: Li Beibei , Wang Jingfeng , Yang Jian , Wang Yuanqing

Identyfikatory

DOI

10.1007/s43452-021-00198-3

• Języki publikacji: EN

Abstrakty

EN

The concrete-filled steel tube (CFT) composite frames using blind bolts and buckling-restrained braces (BRBs) have been studied with the development of building industrialization and energy dissipation technology. However, there has been no research so far on the probabilistic seismic fragility analysis for the blind-bolted end-plate CFT composite frames with BRBs (BRB-BECFT). Therefore, a total of 6-, 9-, 12- and 20-story BRB-BECFT prototype structures were designed based on the performance-based plastic design method. The results obtained from nonlinear static and dynamic analyses indicated that the four structures achieved predefined performance objectives in terms of story drift, joint rotation, and BRB ductility demand. Subsequently, fragility curves including non-collapse and collapse states were established to evaluate the behavior of the structure for a given intensity measure using the incremental dynamic analysis approach. Meanwhile, the geometric mean of spectral acceleration over a period range (Sa,avg) was selected as the intensity measure to assess the structural collapse capacity. Results showed that the adoption of Sa,avg can result in 32–42% lower data dispersion for the determination of collapse point, and simplification of the process of calculation of the collapse margin ratio of a structure. Furthermore, based on the combination of Sa,avg, residual story drift and BRB core plate strain, a framework of probabilistic seismic damage analysis of structures for combined damage evaluation at three levels of the system, subsystem, and component was summarized and conducted by the 6- and 12-story case study. This is practically useful to assess structural damage state after an earthquake because it could present more information on the probability distribution of various damage scenarios.

Słowa kluczowe

EN

concrete-filled steel tube (CFT); buckling-restrained braces (BRBs); blind bolts; fragility curves; probabilistic seismic damage analysis

PL

śruba; uszkodzenie sejsmiczne; wyboczenie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 2
• Strony: 541--562
• Opis fizyczny: Bibliogr. 40 poz., rys., wykr.

Twórcy

autor

Li Beibei

• School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People’s Republic of China
• Department of Civil Engineering, Tsinghua University, Beijing 10084, People’s Republic of China

autor

Wang Jingfeng

• School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, People’s Republic of China
• Anhui Collaborative Innovation Center for Advanced Steel Structure Technology and Industrialization, Hefei 230009, People’s Republic of China

• https://orcid.org/0000-0001-6013-5618

autor

Yang Jian

• School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China

autor

Wang Yuanqing

• Department of Civil Engineering, Tsinghua University, Beijing 10084, People’s Republic of China

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