Fragility Assessment of Buildings With Rigid Walls/Flexible Roof Diaphragms Subjected To Earthquake and Tornado

Abstract eng:
Buildings with rigid walls and flexible roof diaphragms (RWFD) are a common type of single-story construction in North and South America, Europe and New Zealand that incorporate rigid in-plane concrete or masonry walls and flexible in-plane wood or steel roof diaphragms. In this study a fragility analysis methodology was developed to assess the response of RWFD buildings exposed to extreme seismic and wind (tornadoes) events. RWFD buildings incorporating concrete tilt-up wall panels and flexible steel roof diaphragms were considered. The performance goals and structural limit states considered for the fragility assessment of RWFD buildings were developed based on the observed performance of RWFD buildings during past tornadoes and earthquakes in the United States. Fragilities were developed for selected common building configuration and construction of the RWFD structures along the vertical and horizontal load paths for wind and seismic events, respectively. The results of this fragility assessment can be further considered for providing effective strategies to improve the structural safety and response of RWFD buildings as well as to mitigate socio-economic losses from competing natural hazards.

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