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原文传递 Economic Feasibility Study of Self-Centering Concentrically Braced Frame Systems

题名：	Economic Feasibility Study of Self-Centering Concentrically Braced Frame Systems
其他题名：	AISC.2010a.Seismic provisions for structural steel buildings.Chicago,IL:AISC.
正文语种：	英文
作者：	Qindan Huang
关键词：	Self-centering;Steel braced frame;Seismic loss analysis;Life-cycle cost;Numerical modeling;Uncertainty
摘要：	Self-centering concentrically braced frame (SC-CBF) systems have been developed to increase the drift capacity of conventional concentrically braced frame (CBF) systems prior to damage to reduce postearthquake damages. However, due to special details required by the SC-CBF system, the construction cost of a SC-CBF is expected to be higher than that of a conventional CBF. Although recent experimental research has shown better seismic performance of SC-CBF systems subjected to design-basis earthquakes, the benefit of this system must be demonstrated from an economic benefit point of view through investigating whether the higher construction cost of the SC-CBF system can be paid back by lower earthquake-induced losses during the building service life. In this study, the economic effectiveness of the SC-CBF system is assessed by comparing the life-cycle cost of the SC-CBF system with that of the CBF system in three building configurations (6-story, 8-story, and 10-story buildings). Specifically, nonlinear time history analysis is conducted in OpenSEES by subjecting the buildings to ground motion excitations. Probabilistic demand formulations are then developed for engineering demand parameters using the numerical results. Next, annual probability of exceeding damage states, the expected annual loss, and the expected economic benefit are calculated for prototype buildings considering both direct and indirect losses and prevailing uncertainties in all levels of loss analysis. In addition, this paper examines the impact of two different ground motion sets and two seismic hazard levels. The results show that the SC-CBF system is significantly beneficial over the conventional CBF for 6-story and 8-story buildings when subjected to a high seismic hazard, even with a relatively high construction cost amplification over the CBF. The 10-story SC-CBF system, however, shows no economic benefit over the conventional CBF system. The selection of ground motions has a significant influence on the loss values for both systems, but does not change whether the SC-CBF system is beneficial given the seismic hazard and building configuration. In addition, the SC-CBF system has significantly lower displacement-related damage, but higher acceleration-related damage compared to the CBF system.
出版年：	2018
论文唯一标识：	P-26Y2018V144N08010
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)ST.1943-541X.0002093
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	144
期：	08
页码：	99-113