双向加载下不同因素对H型钢构件板壳节段损伤域长度的影响  

Effects of different factors on the length of damage domain of H-section steel plate shell segment under biaxial loading

作　　者：田钦[1] 刘康[1] 康彩霞[2] TIAN Qin;LIU Kang;KANG Caixia(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]南昌大学工程建设学院,江西南昌330031 [2]华东交通大学土木建筑学院,江西南昌330013

出　　处：《南昌大学学报（工科版）》2024年第1期37-44,共8页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(52168023);江西省科技厅青年基金资助项目(20161BAB216113);江西省科技厅面上基金资助项目(20171BAB206050);中国博士后科学基金面上资助项目(2017M611993)。

摘　　要：为研究双向加载条件下,轴压比、长细比、腹板高厚和翼缘宽厚比4个主要参数对H型钢构件损伤域长度的影响,利用有限元软件ABAQUS建立板壳模型进行有限元分析,并给出了双向加载下板壳节段损伤域长度的计算公式。分析结果表明:双向加载更加符合实际情况,所得损伤域长度偏大,提高了板壳节段取值的准确性;在一定区域内,损伤域长度与轴压比和腹板高厚比呈正相关,且增长幅度可达初始值的1倍以上,与翼缘宽厚比呈负相关,最大降幅可达50%以上。当长细比小于临界值时,两者呈负相关,最大降幅达34.28%;反之,两者呈正相关,最大增幅达58.26%。In order to study the influence of the four main parameters of axial compression ratio,slenderness ratio,web height thickness and flange width thickness ratio on the damage domain length of H-section steel members under biaxial loading,the finite element software ABAQUS was used to establish the plate and shell model for finite element simulation analysis,and the calculation formula for calculating the damage domain length of plate and shell segments under two-way loading was given.The analysis results showed that the two-way loading was more in line with the actual situation,and the length of the damage region was too large,thereby improving the accuracy of the values of plate and shell segments;In a certain area,the length of damage zone was positively correlated with axial compression ratio and the web height to thickness ratio,and the growth rate can reach more than twice the initial value,while it is negatively correlated with the flange width-to-thickness ratio,with a maximum reduction of over 50%.When the slenderness ratio was less than the critical value,there was a negative correlation between them,with a maximum decrease of 34.28%;On the contrary,there was a positive correlation between them,with a maximum increase of 58.26%.

关 键 词：H型钢构件 多尺度模型 双向加载 影响参数 损伤域长度 

分 类 号：TU311.41[建筑科学—结构工程]