基于构件性能评估的RC框架结构中震与小震设计对比研究  

Comparison research on designs of RC frame structure based on component performance evaluation under fortification and frequent earthquakes

作　　者：韩小雷[1,2] 刘颖 侯兆熔 季静[1,2] 林哲 HAN Xiaolei;LIU Ying;HOU Zhaorong;JI Jing;LIN Zhe(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China;Guangzhou Weiwang Architectural Technology Company,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640 [3]广州市微望建筑科技有限公司,广州510640

出　　处：《建筑结构》2020年第10期39-43,27,共6页Building Structure

基　　金：亚热带建筑科学国家重点实验室基金(2018ZC05),广州市科技计划基金(201904010221)。

摘　　要：考虑不同的设防烈度、结构高度、场地土类别,建立了18组RC框架结构,分别按照小震、高规中震、广东高规中震3种方法进行设计,对比中震设计对框架结构梁、柱截面尺寸和纵筋、箍筋配筋量的影响。以第一竖向构件失效准则作为结构倒塌的判定依据,基于增量动力分析(IDA)方法对结构进行倒塌易损性分析。结果表明:1)中震设计与小震设计相比,梁、柱截面面积约增大20%,梁纵筋配筋量增大50%~160%,柱纵筋配筋量增大20%~100%,梁、柱箍筋几乎没有变化;2)采用3种设计方法的RC框架结构均满足"大震不倒"的设防要求;3)3层RC框架结构抗倒塌能力:广东高规中震设计>高规中震设计>小震设计,随着层数的增加和设防烈度的提高,结构的抗倒塌能力逐渐变为:小震设计>广东高规中震设计>高规中震设计。Considering different seismic fortification intensities, structural heights and site soil types, 18 groups of RC frame structures were established, and they were designed according to three methods under frequent earthquakes, fortification earthquakes according to national code JGJ 3-2010, and fortification earthquakes according to Guangdong code DBJ 15-92-2013, in order to study the impacts of seismic design on frame structural beams, column section size, the amount of longitudinal reinforcement and stirrup reinforcement under fortification earthquakes. Taking the failure criterion of the first vertical member as the basis for determining the collapse of the structure, the collapse vulnerability analysis of the structure was performed based on the incremental dynamic analysis(IDA) method. The results show that: 1) compared with the design under the frequent earthquake, the design under the fortification earthquake features about 20% increase of cross-sectional area of beams and columns, 50%~160% increase of longitudinal reinforcement of beams, 20%~100% increase of the longitudinal reinforcement of columns, and nearly no change in beams and column stirrups reinforcement;2) RC frame structures adopting three design methods all meet the fortification requirements of "not collapse under the rare earthquake";3) the anti-collapse ability of structure is as follows: design under fortification earthquakes according to Guangdong code DBJ 15-92-2013 > design under fortification earthquakes according to national code JGJ 3-2010 > design under frequent earthquakes, and with the increase of the number of floors and the increase of seismic fortification intensity, the anti-collapse ability of structure gradually becomes: design under frequent earthquakes > design under fortification earthquakes according to Guangdong code DBJ 15-92-2013 > design under fortification earthquakes according to national code JGJ 3-2010.

关 键 词：RC框架结构 基于性能的抗震设计 中震设计 构件变形 

分 类 号：TU375.4[建筑科学—结构工程]