考虑显式残余应力影响的高强钢框架直接分析法

陈绍礼; 刘思威; 李天际; 刘耀鹏

doi:10.13206/j.gjgS26081745

考虑显式残余应力影响的高强钢框架直接分析法

doi: 10.13206/j.gjgS26081745

1. 华南理工大学土木与交通学院, 广州 510641;
2. 香港理工大学土木及环境工程学系, 香港 999077;
3. 上海建工五建集团有限公司, 上海 200333

详细信息

作者简介:
陈绍礼，教授，主要从事钢结构、直接分析法等工作。Email： ceslchan@scut.edu.cn

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出版历程
- 收稿日期: 2026-08-17

Direct Analysis Method for High-Strength Steel Frames Considering Explicit Residual-Stress Models

1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;
2. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China;
3. Shanghai Construction No. 5 (Group) Co., Ltd., Shanghai 200333, China

摘要

摘要: 为提高高强钢构件和框架稳定承载力分析的精度，提出一种考虑显式残余应力模型的直接分析方法。该方法采用拟牛顿迭代截面分析技术，将焊接箱形截面和H型截面的残余应力分布纳入截面强度曲面计算；同时引入曲线任意位置铰（ALH）单元，以模拟初始几何缺陷、P-Δ和P-δ二阶效应以及沿构件长度发展的非线性响应。在此基础上，建立基于截面强度迭代曲面的塑性纤维铰模型，并以铰刚度退化描述截面从初始屈服到极限状态的演化过程。箱形截面、焊接H型柱和空间框架算例表明：显式考虑残余应力和初始缺陷后，所得屈服面、极限承载力及荷载-位移响应与已有试验或有限元结果吻合较好，可为高强钢结构的稳定设计提供有效的数值分析工具。
- 高强钢框架 /
- 直接分析法 /
- 残余应力 /
- 任意位置铰单元 /
- 塑性纤维铰
Abstract: A direct analysis method is proposed for high-strength steel members and frames by explicitly incorporating residual-stress models. The method combines a quasi-Newton cross-sectional analysis procedure with residual-stress distributions for welded box and H-shaped sections. A curved arbitrarily located hinge （ALH） element is adopted to represent initial geometric imperfections， P-Δ and P-δ effects， and nonlinear responses developing along the member length. A plastic fiber hinge model driven by iterative cross-sectional strength surfaces is then used to update the hinge stiffness from initial yielding to ultimate failure. Verification examples involving box sections， welded H-section columns， and a two-story space frame show that， with residual stresses and initial geometric imperfections explicitly considered， the calculated yield surfaces， ultimate bearing capacities， and load-displacement curves agree well with existing experimental or finite-element results. The proposed procedure provides an effective numerical tool for stability design of high-strength steel structures.
- high-strength steel frame /
- direct analysis method /
- residual stress /
- arbitrarily located hinge element /
- plastic fiber hinge

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参考文献(20)

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