钢筋归并对钢筋混凝土框架结构超强特性的影响  

Effect of reinforcement mergence on the overstrength characteristics of RC frames

作　　者：王树和[1] 张举兵[1] 王灵智[1] 赵赤云[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京建筑工程学院土木系,北京100044

出　　处：《北京科技大学学报》2013年第6期831-835,共5页Journal of University of Science and Technology Beijing

摘　　要：按照现行中国抗震设计规范设计了多种层数的钢筋混凝土框架结构,设计中考虑了钢筋的各种归并方案.采用静力弹塑性方法计算了结构的超强系数,分析了结构层数和钢筋归并系数与结构超强性能的关系.超强系数随结构层数的增加而减小,随着钢筋归并系数的增大而增大,在低层结构中归并程度对超强的影响较高层结构更为明显.目前我国抗震规范中地震作用的取值,应该考虑超强在各种因素下的变化而进行相应的修订.Several reinforced concrete frame structures with different stories were designed according to the current Chinese seismic code, in which several schemes of reinforcement mergence were taken into account. The overstrength factor of each structure was calculated by static elastoplastic method. Analysis on the relation of the overstrength factor to the number of stories and the mergence factor show that the overstrength factor decreases with the number of stories increasing but increases with the mergence factor enlarging. The effect of mergence on overstrength is more obvious in low structures than that in high structures. The current Chinese seismic code needs to be revised to consider every factor influencing the overstrength of structures.

关 键 词：抗震设计 钢筋混凝土 框架 超强系数 静力分析 弹塑性 

分 类 号：P315.9[天文地球—地震学]