型钢混凝土异形柱非线性分析

Nonlinear analysis of steel reinforced concrete specially-shaped column

基于压弯构件的原理,编制了适用于计算型钢混凝土(Steel Reinforced Concrete,简称SRC)异形柱截面的弯矩-曲率非线性程序.通过该程序,研究了SRC异形柱(T形、L形)在不同的荷载角、配钢形式、配钢率和轴压力比条件下的截面延性,并对计算结果进行了理论分析.由计算分析可知:加载角对截面的延性有较大的影响;在相同的延性条件下,配钢形式的不同对截面的抗弯承载力影响较大;在常用配钢率范围内,随配钢率的增大,SRC异形柱的延性逐渐增大;随轴压比的增大,SRC异形柱的延性逐渐下降.最后给出了适合于提高抗弯承载力的合理配钢形式,可作为SRC异形柱研究的参考.

Steel reinforced concrete （SRC） specially-shaped column structure is a kind of new structure system, which retains keeps the advantages of specially-shaped columns and SRC structure. Moment-curvature program for SRC speciallyshaped column is worked out based on the principle of pressing and bending member in this paper. According to the program, cross section ductility of SRC specially-shaped columns （T and L section） is investigated. Computation results show that loading angle has much influence on section ductility. And ductility is increasing for common steel ratio as steel ratio increases. But as axial compressing ratio increases as the section ductility decreases. Steel layout has effect on the flexural bearing capacity and a type of reasonable steel layout is put forward for T and L section. nonlinear analysis ; ductility