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原文传递 Recommendations for Ω0 for Anchorage into Concrete for Floor-Mounted Nonstructural Components

题名：	Recommendations for Ω0 for Anchorage into Concrete for Floor-Mounted Nonstructural Components
其他题名：	ACI(American Concrete Institute).(2008)."Building code requirements for structural concrete."ACI 318-08,Farmington Hills,MI.
正文语种：	英文
作者：	Timothy P. Johnson
关键词：	Anchorage into concrete;Overstrength factor;Rocking;Nonstructural components;Ductility;Seismic effects
摘要：	Relative to ductile anchors, nonductile anchors have long been subject to increased design safety margins in U.S. building codes for nonstructural building components. Historically, a safety factor was applied at the end of the calculation process, effectively modifying all elements within a given load case. This factor's most recent implementations in the building codes narrowed its application to the horizontal earthquake component of the seismic load cases, taking the form of the overstrength factor, Ω0, as a demand multiplier for nonductile anchor performance. From a rational combination of empirical observation and precedent, Ω0 was set to 2.5, but minimal experimental or analytical evidence exists to support this value. A research project was thus initiated with funding from Hilti Corporation at San Diego State University to study the overstrength approach through a combination of dynamic structural testing and nonlinear time-history analyses of an idealized nonstructural component with various anchor behaviors. The latter is presented in this paper, which made use of a customized analysis tool that allowed for rapid evaluation of unidirectional earthquake response for a wide range of component and anchor characteristics.
出版年：	2018
论文唯一标识：	P-26Y2018V144N02003
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)ST.1943-541X.0001917
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	144
期：	02
页码：	19-30