钢筋混凝土分体柱的抗震机理  

Seismic mechanism of reinforced concrete split column

作　　者：李忠献[1] 代崇阳[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《地震工程与工程振动》2007年第3期41-46,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家杰出青年科学基金项目(50425824)

摘　　要：为揭示钢筋混凝土分体柱的抗震机理,在以前模型试验基础上,考虑隔板与单元柱之间的非线性接触及钢筋与混凝土之间的黏结滑移,数值模拟了钢筋混凝土分体柱的抗震性能。结果表明:分体柱可实现变短柱为“长”柱的设想;分体柱具有理想的变形能力和延性,延性系数达到4.0;分体柱的刚度随变形增加呈指数衰减,后期刚度退化较为缓和;分体柱具有较高的耗能能力,其耗能系数达1.44;隔板与单元柱的切向接触应力较小,可忽略隔板对单元柱的变形协调作用。进一步验证了钢筋混凝土分体柱具有理想的抗震性能,完善和发展了钢筋混凝土分体柱的设计理论和应用技术。To reveal the seismic mechanism of reinforced concrete （ RC ） split column on the basis of previous model experiments, the seismic behavior of the RC split column is numerically simulated, considering the nonlinear contact between partitions and elemental columns and the bond-slip between bars and concrete. The results show that the split column may transform a short column to ＇ long＇ columns, and has perfect deformation capacity and ductility for which the ductility factor reaches 4.0. The rigidity of the split column attenuates exponentially with the increase of deformation, but the rigidity degrades slowly. The split column possesses better dissipation capacity, and the dissipation factor reaches 1.44. The tangential contact stress between partitions and elemental columns is fairly small, so the compatibility of deformation of the partitions with the elemental columns may be ignored. This certifies further that the RC split column possesses perfect seismic behavior, and the design theory and application technology of RC split column are completed and developed.

关 键 词：钢筋混凝土(RC) 分体柱 抗震机理 隔板 接触 黏结滑移 

分 类 号：P315.952[天文地球—地震学]