基于纤维模型的高强钢焊接箱型截面稳定性分析

张建刚; 魏臣兵

doi:10. 3724/j. gyjzG23112206

基于纤维模型的高强钢焊接箱型截面稳定性分析

doi: 10. 3724/j. gyjzG23112206

中交一公局集团华中工程有限公司, 武汉 430011

详细信息

作者简介:
张建刚，高级工程师，主要从事建筑工程技术方面研究。1723948975@qq.com

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出版历程
- 收稿日期: 2023-11-22
- 网络出版日期: 2026-01-06

Buckling Behavior of High-Strength Steel Welded Box-Sections Based on a Fiber Model

CCCC First Highway Engineering Group Huazhong Engineering Co., Ltd., Wuhan 430011, China

摘要

摘要: 为进一步研究不同强度等级高强钢焊接箱型截面轴压柱的稳定性，采用纤维模型数值研究方法对高强钢焊接箱型柱的整体稳定承载力进行分析，并将结果用来验证现行规范中柱子曲线的适用性，其中，数值研究中纤维模型的建立考虑了残余应力和几何缺陷的影响。首先采用该方法计算现有试验中部分高强钢焊接箱型试件的极限承载力，将其与试验结果对比来验证使用纤维模型的可靠性；然后利用该模型进行480个算例的参数分析，具体包括名义屈服强度460~960 MPa的5种材料、8种截面尺寸和对应于每种截面的12种长细比，将分析结果与现行规范的设计曲线进行比较，对适用于高强钢轴压构件的设计曲线进行重选更新，建议460~550 MPa钢材构件与690~960 MPa钢材构件的稳定系数分别采用b类柱与a类柱进行设计；最后对规范中柱子曲线计算式的系数进行修正，提出了适用于不同屈服强度高强钢的建议计算式。
- 高强钢 /
- 轴压构件 /
- 纤维模型 /
- 稳定承载力 /
- 参数化分析
Abstract: To further investigate the stability of high-strength steel （HSS） welded box-section axiallycompressed columns with different strength grades，the overall buckling strength of HSS welded box-section columns was analyzed using the numerical fiber model method. The results were then used to verify the appli-cability of the column curves specified in the current code. A fiber model was established，taking into account the effects of residual stress and geometric imperfections. The overall bearing capacities of the HSS welded box-section specimens were calculated，and the accuracy of the fiber model was verified by comparing the results with experimental data. Based on the fiber model，the overall bearing capacities of 480 specimens were analyzed，including five nominal yield strengths ranging from 460 MPa to 960 MPa，eight box-section dimensions，and twelve slenderness ratios for each section. The parametric analysis results were compared with the design curves of the current steel structure design code，and the design curves suitable for HSS axially-compressed members were updated It is recommended that the stability coefficient of 460-550 MPa steel members and 690-960 MPa steel members should be designed with b-type columns and a-type columns respectively. Additionally，the coefficients in the column curve formula of the code were modified，and a new calculation formula suitable for HSS with different yield strengths was proposed.
- high-strength steel /
- axially-compressed column /
- fiber model /
- buckling capacity /
- parametric study

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参考文献(17)

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