详情

原文传递 Scaling Bias and Record Selection for Quantifying Seismic Structural Demand

题名：	Scaling Bias and Record Selection for Quantifying Seismic Structural Demand
其他题名：	ASCE.(2016)."Minimum design loads for buildings and other structures."ASCE/SEI 7-16,Reston,VA.
正文语种：	英文
作者：	Mohammad Mehdizadeh
关键词：	Nonlinear dynamic analysis;Ground motion scaling;Performance-based earthquake engineering;Maximum response;Seismic effects
摘要：	Lack of sufficient earthquake records for a given site and hazard level is a frequent challenge in seismic response assessment. This paper considers the response of several simple nonlinear systems to "amplitude-scaled" ground motions suites to determine bias in the response obtained compared with unscaled records. The dependence of this bias ratio on properties of the nonlinear system (e.g., elastic period and yield strength) and the parameter used to scale the ground motions [e.g., peak ground acceleration (PGA), peak ground velocity (PGV), and elastic spectral displacement] are investigated. Results showed that the amount of the bias is considerable and dependent on the properties of the nonlinear system, scaling parameter, and amplitude, and the bias can significantly affect the results of performance-based analyses. The origin of the bias was investigated and, consequently, a new metric is proposed to predict the bias induced by ground motion scaling without nonlinear analysis. Results demonstrated that using the predictor as a scaling parameter can significantly reduce the bias for various nonlinear single- and multi-degree-of-freedom structures.
出版年：	2017
论文唯一标识：	P-26Y2017V143N09041
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)ST.1943-541X.0001855
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	143
期：	09
页码：	498-509