Q420双角钢组合截面偏压构件弹塑性弯曲屈曲

俞登科; 李正良; 杨隆宇; 余周

doi:10.3969/j.issn.1674-4764.2012.05.003

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Q420双角钢组合截面偏压构件弹塑性弯曲屈曲

更新时间：2023-11-28

- Q420双角钢组合截面偏压构件弹塑性弯曲屈曲
- Elastoplastic Bending Buckling of Q420 Eccentric Compression Members with Double-angle Combined Cross-section
- 土木与环境工程学报（中英文） 2012年34卷第5期页码：12-16
- 作者机构：
  
  1. 重庆大学土木工程学院
  2. 山地城镇建设与新技术教育部重点实验室,重庆,400045
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(51078367)
- DOI：10.3969/j.issn.1674-4764.2012.05.003
  中图分类号：
- 纸质出版：2012
- 稿件说明：
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俞登科, 李正良, 杨隆宇, 等. Q420双角钢组合截面偏压构件弹塑性弯曲屈曲[J]. 土木与环境工程学报（中英文）, 2012,34(5):12-16.

YU Dengke, LI Zhengliang, YANG Longyu, et al. Elastoplastic Bending Buckling of Q420 Eccentric Compression Members with Double-angle Combined Cross-section[J]. Journal of Civil and Environmental Engineering, 2012, 34(5): 12-16.
俞登科, 李正良, 杨隆宇, 等. Q420双角钢组合截面偏压构件弹塑性弯曲屈曲[J]. 土木与环境工程学报（中英文）, 2012,34(5):12-16. DOI： 10.3969/j.issn.1674-4764.2012.05.003.

YU Dengke, LI Zhengliang, YANG Longyu, et al. Elastoplastic Bending Buckling of Q420 Eccentric Compression Members with Double-angle Combined Cross-section[J]. Journal of Civil and Environmental Engineering, 2012, 34(5): 12-16. DOI： 10.3969/j.issn.1674-4764.2012.05.003.

摘要

通过试验研究了特高压输电塔塔身主材规格为L160×12、L160×14、L160×16的3种Q420高强双角钢十字组合截面偏压构件的破坏模式，试验结果表明此种构件均以整体弹塑性弯曲屈曲破坏为主。基于改进逆算单元长度法编制相应程序，计算得到了这3种角钢规格在不同长细比并考虑残余应力情况下截面的弯矩轴力相关曲线，提出适用于此类截面形式的弯矩作用平面内稳定的建议计算公式及柱子曲线。引用的非线性幂函数模型能较好的反映此类偏压构件在等端弯矩受力作用下杆件端部弯矩与杆端转角的弯矩转角关系。

Abstract

The experiments were carried out to investigate the behavior and failure modes of Q420 double-angle combined cross-section members whose specification were L160×12

L160×14

L160×16. The results show that all the members fail with an elastoplastic bending buckling. Based on the improvement of the inverse calculation segment length method and some relevant procedures

the related curves of axial force and moment with different specifications

different slenderness ratios and residual stresses were calculated. The calculation method of in-plane stability and column curves were proposed. The nonlinear power function model is appropriate for such members' moment-rotation relations under equal bending moments.

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