建筑结构学报2025，Vol.46Issue(2)：181-190,10.DOI:10.14006/j.jzjgxb.2024.0159
梯形波纹腹板钢梁的热点应力集中系数研究
Study on hot spot stress concentration factor of trapezoidal corrugated-web steel girders
摘要
Abstract
In order to carry out fatigue design of corrugated-web steel girders(CWGs)based on hot spot stress method,four-point bending static tests of four groups of trapezoidal corrugated-web steel girders(TCWGs)with different dimensions were conducted.The effects of corrugation angle,corner radius,and corrugation length on the hot spot stress concentration factor(SCF)at the bottom flange S-point in the constant bending region were examined.The test results show that the SCFs of the tested girders are in the range of 1.41 to 1.82.Reducing the corrugation angle and corrugation length and increasing the corner radius contributes to reduce the stress concentration in the TCWGs.Finite element models of CWGs were developed,and parametric analyses of the SCFs were performed.It is found that the tangent of corrugation angle,ratio of corner radius to web thickness,length of parallel folds to the projection length of inclined folds ratio,flange-to-web thickness ratio,web height-thickness ratio,and flange width to thickness ratio significantly affect the SCF of TCWGs.However,the SCF is relatively less affected by the ratio of fillet weld leg size to web thickness.A formula for calculating the SCF of TCWGs under uniform bending was proposed through regression analysis,and the validity of the formula was confirmed through a comparison with the test and FE results.关键词
梯形波纹腹板钢梁/静力试验/有限元分析/热点应力集中系数/计算式Key words
trapezoidal corrugated-web steel girder/static test/finite element analysis/hot spot stress concentration factor/calculation formula分类
建筑与水利引用本文复制引用
左国稷,童乐为,赵珍琲,王海林,潘春宇,颜阳..梯形波纹腹板钢梁的热点应力集中系数研究[J].建筑结构学报,2025,46(2):181-190,10.基金项目
国家自然科学基金项目(52178154). （52178154）
