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http://dx.doi.org/10.21022/IJHRB.2020.9.2.175

Seismic Reliability Assessment of Mid- and High-rise Post-tensioned CLT Shear Wall Structures  

Sun, Xiaofeng (Department of Structural Engineering, Tongji University)
Li, Zheng (Department of Structural Engineering, Tongji University)
He, Minjuan (Department of Structural Engineering, Tongji University)
Publication Information
International Journal of High-Rise Buildings / v.9, no.2, 2020 , pp. 175-185 More about this Journal
Abstract
Currently, few studies have been conducted to comprehend the seismic reliability of post-tensioned (PT) CLT shear wall structures, due to the complexity of this kind of structural system as well as due to lack of a reliable structural model. In this paper, a set of 4-, 8-, 12-, and 16-storey benchmark PT CLT shear wall structures (PT-CLTstrs) were designed using the direct displacement-based design method, and their calibrated structural models were developed. The seismic reliability of each PT-CLTstr was assessed based on the fragility analysis and based on the response surface method (RSM), respectively. The fragility-based reliability index and the RSM-based reliability index were then compared, for each PT-CLTstr and for each seismic hazard level. Results show that the RSM-based reliabilities are slightly less than the fragility-based reliabilities. Overall, both the RSM and the fragility-based reliability method can be used as efficient approaches for assessing the seismic reliabilities of the PT-CLTstrs. For these studied mid- and high-rise benchmark PT-CLTstrs, following their fragility-based reliabilities, the 8-storey PT-CLTstr is subjected to the least seismic vulnerability; while, following their RSM-based reliabilities, the 4-storey PT-CLTstr is subjected to the least seismic vulnerability
Keywords
Cross-laminated timber; post-tensioned timber structure; seismic reliability; fragility analysis; response surface method;
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