华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (6): 136-141,146.

• 土木建筑工程 • 上一篇    下一篇

钢筋混凝土L形截面柱的曲率延性

蔡健 许雪峰   

  1. 华南理工大学 土木工程系, 广东 广州 510640
  • 收稿日期:2008-06-17 修回日期:2008-12-16 出版日期:2009-06-25 发布日期:2009-06-25
  • 通信作者: 蔡健(1959-),男,教授,博士生导师,主要从事土木工程结构研究. E-mail:cvjcai@scut.edu.cn
  • 作者简介:蔡健(1959-),男,教授,博士生导师,主要从事土木工程结构研究.
  • 基金资助:

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

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

Cai Jian  Xu Xue-feng   

  1. Department of Civil Engineering , South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-06-17 Revised:2008-12-16 Online:2009-06-25 Published:2009-06-25
  • Contact: 蔡健(1959-),男,教授,博士生导师,主要从事土木工程结构研究. E-mail:cvjcai@scut.edu.cn
  • About author:蔡健(1959-),男,教授,博士生导师,主要从事土木工程结构研究.
  • Supported by:

    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.

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

Abstract:

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   both the neutral axis angle and the axial compression ratio have great effect on the curvature ductility;   the increase of volumetric percentage of stirrups generally improves the curvature ductility;   at a constant axial compression ratio, concrete strength and longitudinal steel strength only have slight influence on the curvature ductility; and   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.

Key words: L-shaped cross section, reinforced concrete column, neutral axis angle, load angle, curvature ductility