开孔形式对蜂窝框架抗震性能的影响  

Effect on Seismic Performance of Cellular Frame due to the Web Open Form

作　　者：贾连光[1] 孙宏达[1] 李庆文[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2011年第4期666-673,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：住房和城乡建设部科技攻关项目(2007-k2-17)

摘　　要：目的通过低周反复荷载试验和有限元模拟对蜂窝式钢框架抗震性能进行研究.方法以蜂窝式钢框架结构抗震性能试验为基础,利用有限元软件建立合理的有限元模型,将计算结果与试验对比验证模型合理性,并利用有限元软件对蜂窝式钢框架抗震性能进行深入分析.结果有限元计算结果与试验吻合较好,模型合理.对腹板扩高比相同的蜂窝梁采用不同开孔形式框架结构,在低周反复荷载作用下的受力过程和破坏形式进行模拟,得到了不同开孔形式下蜂窝钢框架的滞回曲线、骨架曲线、刚度退化、延性等性能并进行对比与分析.结论对于一定扩高比蜂窝梁的框架结构,抗震性能按圆形孔、六边形、矩形孔顺序依次变差.采用合适的扩高比与孔型可提高钢框架抗震性能.This article research escellular steel frame seismic performance through low cyclic loading test and the finite element software simulation.Based on the testing of cellular steel frame seismic performance,a reasonable finite element model is established by using the finite element software.The calculated results and the testing ones are compared to validate the model＇s rationality,and the cellular steel frame seismic performance are analyzed in-depth by using finite element software.The results of the finite element and testing were fit well.And the model is reasonable.Through the different opening form frame structure using the same expansion ratio,low cyclic and under the action of the stress process and failure modes,such as performance compared and analyzed,we attained the results of hysteretic curve,skeleton curves,stiffness degradation,ductility,and other behavior of framework and carried on the contrast and analysis.For a certain expansion ratio of honeycomb beam frame structure,the seismic performance of the circular holes,the hexagon opening,and the rectangular holes becomes poorer and poorer in order.Adopting suitable expansion ratio and opening form can improve steel frame seismic performance.

关 键 词：蜂窝钢框架 抗震性能 孔型 扩高比 有限元 

分 类 号：TU392[建筑科学—结构工程]