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陶征强,曹现雷,钟锐,等. 800 MPa高强钢T形截面轴压构件极限承载力有限元分析[J]. 安徽工业大学学报(自然科学版),xxxx,x(x):x-xx. doi: 10.12415/j.issn.1671-7872.23063
引用本文: 陶征强,曹现雷,钟锐,等. 800 MPa高强钢T形截面轴压构件极限承载力有限元分析[J]. 安徽工业大学学报(自然科学版),xxxx,x(x):x-xx. doi: 10.12415/j.issn.1671-7872.23063
TAO Zhengqiang, CAO Xianlei, ZHONG Rui, WANG Pei, TAO Qinglin, CHEN Yunxu. Finite Element Analysis of Ultimate Load Carrying Capacity of 800 MPa High-strength Steel T-shaped Section Axial Compression Members[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.23063
Citation: TAO Zhengqiang, CAO Xianlei, ZHONG Rui, WANG Pei, TAO Qinglin, CHEN Yunxu. Finite Element Analysis of Ultimate Load Carrying Capacity of 800 MPa High-strength Steel T-shaped Section Axial Compression Members[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.23063

800 MPa高强钢T形截面轴压构件极限承载力有限元分析

Finite Element Analysis of Ultimate Load Carrying Capacity of 800 MPa High-strength Steel T-shaped Section Axial Compression Members

  • 摘要: 针对800 MPa高强钢T形截面轴压构件失稳问题,基于ABAQUS软件建立有限元计算模型,分析残余应力、几何初始缺陷、翼缘宽厚比、腹板高厚比和构件长细比对构件极限承载力的影响,建立正则化长细比与整体稳定系数关系曲线,并将所得高强钢T形截面轴压构件的极限承载力结果与GB 50017—2017系列设计规范进行比较分析。结果表明:建立的有限元模型能够准确模拟试验构件的屈曲行为,残余应力峰值对短柱承载力影响较小,对大长细比构件的承载力影响较大;试件初弯曲和板件翘曲对小长细比构件极限承载力影响较大,随构件长细比增加,构件极限承载力随着翼缘宽厚比变化表现为敏感度降低,腹板的高厚比变化规律与之类似。计算得到的稳定系数与GB 50017—2017中b类柱子曲线吻合较好,建议采用b类柱子曲线计算800 MPa高强钢焊接T形截面轴压构件的极限承载力。

     

    Abstract: Aiming at instability of 800 MPa high-strength steel T-section axial compression members, a finite element analysis model was established based on ABAQUS software, and the ultimate bearing capacity. The effect of residual stress, geometric initial defects, flange width-thickness ratio, web height-thickness ratio and member length-thinness ratio on the ultimate load carrying capacity of the member was analyzed by the finite element model, and the ultimate bearing capacity results of the T-section axial compression members made of high-strength steel were compared with those specified in the GB 50017—2017 design code series. The results show that: the finite element model can accurately simulate the buckling behavior of the test member; the peak residual stress has a small effect on the bearing capacity of the short column, while it has a large effect on the bearing capacity of the large slenderness member; the initial bending of the test piece and the buckling of the plate have a large effect on the ultimate bearing capacity of the small slenderness member; with the increase of the slenderness of the member, the ultimate load capacity of the member exhibits a decrease in sensitivity with changes in the flange width-to-thickness ratios, and the change of the high-thickness ratio of the web is similar to it. The calculation results are in good agreement with the b class column curve in GB 50017—2017 standard, and it is recommended to use the b class column curve to calculate the ultimate bearing capacity of the axial compression members of 800 MPa high strength steel welded T-shaped section.

     

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