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Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models

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Abstract

A methodology was recently proposed for the development of hazard-compatible building fragility models using parameters of capacity curves and damage state thresholds from HAZUS (Karaca and Luco, 2008). In the methodology, HAZUS curvilinear capacity curves were used to define nonlinear dynamic SDOF models that were subjected to the nonlinear time history analysis instead of the capacity spectrum method. In this study, we construct a multilinear capacity curve with negative stiffness after an ultimate (capping) point for the nonlinear time history analysis, as an alternative to the curvilinear model provided in HAZUS. As an illustration, here we propose parameter values of the multilinear capacity curve for a moderate-code low-rise steel moment resisting frame building (labeled S1L in HAZUS). To determine the final parameter values, we perform nonlinear time history analyses of SDOF systems with various parameter values and investigate their effects on resulting fragility functions through sensitivity analysis. The findings improve capacity curves and thereby fragility and/or vulnerability models for generic types of structures.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Converting HAZUS capacity curves to seismic hazard-compatible building fragility functions: effect of hysteretic models
Year Published:
2008
Language:
English
Publisher:
IAEE
Publisher location:
Tokyo, Japan
Contributing office(s):
Geologic Hazards Science Center
Description:
8 p.
Larger Work Type:
Book
Larger Work Subtype:
Conference publication