钢筋混凝土L形截面柱的曲率延性  

Curvature Ductility of Reinforced Concrete Column with L-Shaped Crosse Section

作　　者：蔡健[1] 许雪峰[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2009年第6期136-141,146,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：科技部重大基础研究前期研究专项基金资助项目(2004CCA03300)

摘　　要：在充分考虑荷载角对L形截面柱曲率延性影响的基础上,提出两种曲率延性的概念.通过对10800根L形截面柱的曲率延性进行模拟计算,得出了各因素对曲率延性的影响规律:中和轴角及轴压比对曲率延性的影响最大;体积配箍率的增加从整体上提高了L形截面柱的曲率延性;在轴压比不变的情况下,混凝土强度和纵筋强度对曲率延性的影响不大;随着L形率的减小,曲率延性曲线趋于平滑.文中还建立了中和轴角曲率延性及荷载轴角曲率延性的计算公式.By fully considering the influence of load angle on the curvature ductility of reinforced concrete （RC） columns with L-shaped cross sections, two kinds of curvature ductilities are defined. Then, the curvature ductilities of 10800 L-shaped columns are calculated by simulation, and the influences of different parameters on the curvature ductility are revealed. The results indicate that （ 1 ） both the neutral axis angle and the axial compression ratio have great effect on the curvature ductility; （2） the increase of volumetric percentage of stirrups generally improves the curvature ductility; （3） at a constant axial compression ratio, concrete strength and longitudinal steel strength only have slight influence on the curvature ductility; and （4） the curve of curvature ductility tends to be smooth when the L-shaped ratio decreases. The formulas to calculate the curvature ductilities of neutral axis angle and load angle are also presented in the paper.

关 键 词：L形截面柱 钢筋混凝土柱 中和轴角 荷载角 曲率延性 

分 类 号：TU375[建筑科学—结构工程]