后张预应力加固带构造柱砖墙性能研究  

RESEARCH ON THE PROPERTIES OF BRICK WALLS WITH STRUCTURAL CONCRETE COLUMNS RETROFITTED BY POST-TENSIONED TENDONS

作　　者：班力壬 刘航[2] 戚承志[3] 华少锋[3] 宫月 薛耀东 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]北京市建筑工程研究院有限责任公司,北京100039 [3]北京建筑大学北京未来尝试设计高精尖中心2011节能减排协同创新中心,北京100044

出　　处：《工业建筑》2017年第11期95-99,147,共6页Industrial Construction

基　　金：973重大项目(802015CB575);国家自然科学基金项目(51478027;51174012);北京市科技计划重大项目(D131100003713003);北京市自然科学基金项目(8162019)

摘　　要：为解决带构造柱砖砌体墙体在地震作用下易开裂、易发生脆性破坏等抗震性能差的问题,提出了一种新型后张预应力加固带构造柱砖砌体方法。为验证该方法的加固效果,进行了8片带构造柱砖砌体墙片在水平低周反复荷载下的试验,包括1片无预应力筋加固的对比墙片;7片均匀布置不同对数预应力钢筋与不同竖向预应力的加固墙片。并进一步基于MSC.MARC有限元软件分析了其在单调位移加载下的受力形态。试验与有限元仿真结果共同表明该方法可以显著提高无筋墙体的抗剪强度与整体性能,从而显著提高其抗震能力。在验证有限元计算方法正确的基础上进行了有限元参数化分析,分析结果表明在预应力钢筋应力比为0.4时加固效果较好。In order to solve the problems of easy cracking and brittle failure caused by poor seismic behavior of brick walls with structural concrete columns under seismic excitation,a new reinforcement method of post-tensoned was proposed.For the purpose of verifying the reinforcement effect of the method,the experimental study of eight nonreinforced brick walls with structural concrete columns was carried out under quasi-static loading,including 1 nonretrofitted wall for comparison and 7 walls retrofitted with different arrangements of post-tensioned tendons.In addition,the stress response state under monotonic displacement loading was further analyzed by MSC.MARC finite element software.The results of the experiment and finite element analysis showed that post-tensoned could increase the shear strength and the overall performance of non-reinforced brick walls,and the seismic behavior was also significantly improved.The finite element parametric analysis was carried out on the basis of validating the finite element method.The results showed that the reinforcement effect was better when the stress ratio of prestressed steel was 0.4.

关 键 词：非线性 抗震加固 有限元法 预应力 砌体 

分 类 号：TU362[建筑科学—结构工程]