摘要
为了满足钢筋混凝土异形柱结构体系的抗震性能的要求,异形柱构件需要有足够的延性,从而避免其发生脆性破坏,而轴压比是众多影响异形柱构件延性的因素中最主要的因素之一.从大、小偏心受压构件截面的界限破坏条件出发,着重考虑中和轴角变化的影响,采用简化的平行线法计算中和轴的位置并采用数值分析对钢筋混凝土T形柱构件界限轴压比进行分析,得出各种中和轴角情况下的T形柱构件的界限轴压比及其变化规律,对比广东异形柱规程和天津异形柱规程中轴压比限值的规定,提出在特殊的中和轴角范围内应做相应的调整,并对钢筋混凝土T形截面异形柱轴压比限值提出了设计建议.
Because the demand from the earthquake-resistance capability of RC frame structures consist of special-shaped columns, the column members should be designed with adequate ductility to prevent brittle failure. The axial compression ratio is one of the most important factors that influence the ductility of members. On the basis of the limit failure conditions of the section of eccentric compression member, this paper used a parallel-method to calculate the position of neutral axis when the angle of neutral axis changes. It uses numerical analysis to study the ultimate axial compression ratio for T-shaped RC columns. The paper studies the ultimate axial compression ratio of T-shaped members and its variation rule when the angle of neutral axis changes. Comparing with the technical specification of Guangdong and Tianjin, adjustment of the limit of axial compression ratio of special angles of neutral axis and useful advices for design and construct are presented.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2007年第2期213-218,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(19372067)
关键词
异形柱
轴压比
界限轴压比
T形截面
中和轴角
special-shaped columns
axial compression ratio
ultimate axial compression ratio
T-shaped section
angle of neutral axis
