【作者】 李明； 王立国； 王元清； 陶伟； 王斌； 单仁亮； 陈吉光；

【Author】 Li Ming;Wang Liguo;Wang Yuanqing;Tao Wei;Wang Bin;Shan Renliang;Chen Jiguang;School of Civil Engineering,Shenyang Jianzhu University;Jangho Group Co.Ltd;China University of Mining & Technology;Department of Civil Engineering,Tsinghua University;

【机构】 沈阳建筑大学土木工程学院； 江河创建集团股份有限公司； 中国矿业大学； 清华大学土木工程系；

【摘要】 在钢筋混凝土框-剪结构中,剪力墙连梁和其上对应部分的框架梁(称为框架连梁)在水平荷载作用下,存在协同工作阶段。深入分析该阶段二者的工作机理,有助于准确掌握框-剪结构的整体工作机理,为提高框-剪结构的整体抗震性能提供依据。而有关该方面的研究还很少。为此,将剪力墙连梁和框架连梁组成的并联不等宽双连梁(简称双连梁)作为研究对象,采用有限元模拟方法,模拟了11个双连梁在低周往复荷载作用下的受力过程,分析了影响双连梁刚度退化的因素。结果表明,影响其刚度退化的主要因素为框架连梁跨高比、其次为剪力墙连梁跨高比,而框架连梁截面宽度、混凝土强度和钢筋面积比对其刚度退化影响不大。更多还原

【Abstract】 In reinforced concrete frame-shear wall structure(FWS),coupling beam of shear wall(CB) and the corresponding frame beam up to it,briefly called frame coupling beam(FCB),has a stage of cooperative working under horizontal load.It will be helpful for knowing the whole working mechanism of FWS if the working mechanism of that stage is deeply analyzed,which will provide the basis for improving the whole seismic behavior of FWS.However,less research has done on it.So,the parallel double coupling beams with different width composed of CB and FCB,briefly called double beams(DB),is taken as a research object.The load-bearing process of 11 DBs under low-cycle repeated load are simulated with finite element simulation method.How the stiffness degradation of DBs are influenced by different influencing factors are analyzed.The results show that the span-depth ratio of FCB and the span-depth ratio of SCB has the largest and second largest influence on the stiffness degradation of DBs separately,yet the width of FCB,the strength of concrete and the reinforced area ratio of DBs has no less effect on the stiffness degradation of DBs.更多还原