Seismic performance of post-and-beam timber buildings II: reliability evaluations |
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Authors: | Minghao Li Frank Lam Ricardo O Foschi Shiro Nakajima Takafumi Nakagawa |
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Institution: | (1) Department of Wood Science, University of British Columbia, 2835-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada;(2) Department of Wood Science, University of British Columbia, 4041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada;(3) Department of Civil Engineering, University of British Columbia, 2005-6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, Canada;(4) Building Research Institute, 1-Tachihara, Tsukuba Ibaraki, 305-0802, Japan |
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Abstract: | This paper presents an approach to evaluate the performance reliability of post-and-beam timber buildings under seismic excitation.
The uncertainties considered include those associated with the earthquake ground motions, the structural mass and shear wall
characteristics. The approach uses a verified structural model called “PB3D” for the creation of a database of seismic responses,
which are then represented by appropriate response surfaces. These, in turn, are used to formulate explicit performance functions
for the reliability analysis. Performance is studied in terms of peak inter-story drift, and polynomial functions are used
to represent the seismic response surfaces. Non-performance probabilities are evaluated with respect to different performance
expectations, using FORM and importance sampling methods. Case studies for two multi-story post-and-beam buildings are also
presented. |
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