套建增层预应力型钢混凝土组合框架罕遇地震下抗倒塌性能分析  

Anti-collapse Performance of Out-Jacketing PSRC Frame for Adding Stories under Severe Earthquakes

作　　者：王琨[1] 袁沈峰[1] 曹大富[1] 陈再现[2] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《沈阳建筑大学学报（自然科学版）》2014年第2期248-255,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51208150);江苏省高校自然科学研究项目(11KJB560006);扬州大学科技创新培育基金项目(2012CXJ031)

摘　　要：目的研究罕遇地震作用下套建增层预应力型钢混凝土组合框架在不同抗震设防区和场地土下的倒塌规律,以提高套建增层组合框架结构的抗倒塌能力.方法采用IDARC平面分析程序对一榀单层单跨预应力型钢混凝土梁-角钢混凝土柱组合框架开展滞回性能全过程分析,并与试验结果对比,验证所建数值模型的可靠性,在此基础上建立单跨多层结构形式的套建增层组合框架数值模型,并开展罕遇地震作用下弹塑性时程分析.结果随着套建增层组合框架底层柱高度的增加和增层层数的增多,底层柱损伤呈降低的趋势;同时依据套建增层组合框架底层层高和增层层数,得到了8度和7度抗震设防区下,I、II、III类场地土上套建增层组合框架的倒塌范围.结论倒塌的套建增层组合框架均表现为底层出现层间铰的倒塌机制,依据现行规范对倒塌的套建增层组合框架提高一个抗震等级后均可避免其发生倒塌破坏,可为相关工程设计提供参考.In order to investigate the collapse behavior of the out-jacketing PSRCF frame for adding stories under severe earthquake on different earthquake fortification area and different site,and to enhance the anticollapse capacities,this paper conducts a hysteretic behavior simulation of single span and single story PSRCF frame composed of prestressing steel reinforced concrete beam and angle-steel concrete column using nonlinear program IDARC,and the numerical results w ere compared to the tests. And the numerical model w as proved to be reliability. Based on the simulation results,the numerical model for one span and several stories of out-jacketing PSRC frame w ere built for elasto-plastic time history analysis under severe earthquake. The analysis results indicated that the damage of the ground floor columns decreased w ith the increasing of the length of columns of ground floor and the amount of the added stories,and the collapse range of the out-jacketing PSRCF frames on the site of I,II and III under 8 and 7 degree seismic fortification zonew ere acquired in terms of the length of ground floor and the amount of the added stories. The collapsed frames behaved the failure mechanism of columns hinges in the ground floor,and the measure of increasing anti-seismic grade of the out-jacketing PSRC frame for one grade could prevent the related collapse failure. And some technical reference could be used for some project.

关 键 词：型钢混凝土组合梁 角钢混凝土柱 框架 倒塌 

分 类 号：TU375.1[建筑科学—结构工程]