【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.更多还原

【Abstract】 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.更多还原