一种采用钢管混凝土核心柱和预应力型钢混凝土梁的底层柔性结构  

Bottom flexible structure adopting steel tube concrete core column and prestressed steel concrete beam

作　　者：王琨[1,2] 时金雨 徐冠普 李新宇 周俊 WANG Kun;SHI Jinyu;XU Guanpu;LI Xinyu;ZHOU Jun(College of Civil Science and Engineering,Yangzhou Univercity,Yangzhou 225127,China;Jiangsu Hanjian Group Co.,Ltd.,Yangzhou 225127,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]江苏邗建集团有限公司,江苏扬州225127

出　　处：《地震工程与工程振动》2021年第6期145-157,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51878589);江苏省“双创计划”资助项目(2018);扬州市“绿扬金凤”资助项目(2018);2020年扬州大学研究生实践创新计划(YSJCX20_013,XSJCX20_023)。

摘　　要：为研究采用钢管混凝土核心柱的套建增层预应力型钢混凝土(prestressed steel reinforced concrete frame,简称PSRC)套建增层框架在罕遇地震作用下的抗倒塌性能,文中基于非线性分析软件IDARC-2D对一榀单层单跨预应力型钢混凝土梁-钢管混凝土核心柱框架开展滞回性能分析,并与试验结果对比验证,确定了数值分析所需的截面退化参数,在此基础上,建立了单跨多层套建增层框架模型,并分别对设防烈度为8度和7度,建造于I_(0)、I_(1)、Ⅱ、Ⅲ类场地,按第1、第2、第3设计地震分组设计的套建增层框架,开展罕遇地震作用下弹塑性时程分析,细致考察了套建增层框架的倒塌破坏特征和倒塌范围。研究结果表明:在8度罕遇地震作用下,建造于前述场地类别的部分套建增层框架将发生底层层间倒塌破坏;而在7度罕遇地震作用下,套建增层框架梁柱构件普遍开裂,但均未发生倒塌;在8度抗震设防区对底层层高为8.1~14.4 m、增层层数为1~4层的倒塌套建框架提高一个抗震等级进行设计后,均避免了倒塌破坏。In order to study the anti-collapse performance of prestressed steel reinforced concrete out-jacketing frames with steel-pipe reinforced concrete columns for adding storeyes under rare earthquakes,soft IDARC-2D is used to analyze the hysteretic performance of a one-span and one-storey frame with prestressed steel reinforced concrete beam and steel-pipe reinforced concrete columns,which was compared to the tested results to determine the degradation parameters.On this basis,the numerical models of out-jacketing frames with single span and multi-storey structure were established,and the elastoplastic time history analysis was carried out for out-jacketing frames built for site-class I_(0)、I_(1)、Ⅱ、Ⅲwith 1^(st)、2^(nd)、3^(rd) design groups and for seismic fortification intensity 7 and 8 under rare earthquakes,and the failure patterns and failure ranges were carefully observed.It indicated that some out-jacketing frames for seismic intensity 8 will collapse with the failure of ground floor show under rare earthquakes;while out-jacketing frames for seismic intensity 7 will not collapse just with cracks on beam and column components.It is suggested that out-jacketing frames for seismic fortification intensity 8 which were collapsed could avoid failure collapse when the seismic grade were enhanced a level.Finally,by analyzing the collapse damage scope and adjusting the seismic measures,this paper puts forward some design suggestions to avoid the collapse of the frame.

关 键 词：钢管混凝土核心柱 套建增层框架 预应力 滞回性能 倒塌分析 

分 类 号：TU375.1[建筑科学—结构工程]