NEHRP Clearinghouse

Seismic Fragility Analysis of Shear Wall Structures.
Jaw, J. W.; Hwang, H. H. M.
National Center for Earthquake Engineering Research, Buffalo, NY.; National Science Foundation, Washington, DC., April 30, 1988, 64 p.
The report presents a fragility analysis method to generate seismic fragility curves for shear wall structures. Uncertainties including randomness and modeling uncertainty in earthquake ground motion and structure are quantified by evaluating uncertainties in pertinent parameters which define earthquake load-structure system. For the response analysis, the modified Takeda hysteretic model is utilized to describe the nonlinear structural behavior. The nonlinear seismic analyses are performed in time domain for all samples of earthquake load-structure system to obtain an ensemble of structural responses, which are then statistically analyzed. Five limit states representing various degrees of structural damage due to earthquake are established. Then, the statistics of the structural capacity corresponding to each limit state probability is evaluated on the basis of statistics of response and capacity for each limit state. The fragility curve is generated by evaluating the limit state probabilities at different levels of peak ground acceleration.
Response; Earthquake resistant structures; Fatigue (Materials); Mechanical hysteresis; Graphs (Charts); Earthquakes; Loads (Forces); Mechanical properties; Shear wall structures; Seismic effects; Seismic analysis; Dynamic loads; Dynamic structural analysis