河南城建学院学报2024，Vol.33Issue(4)：58-64,79,8.DOI:10.14140/j.cnki.hncjxb.2024.04.008
计算长度反推法在钢压杆整体稳定试验中的应用
Application of reverse method for length calculation in overall stability test of steel compression bar
摘要
Abstract
The overall stable bearing capacity of steel compression bar is closely related to the initial geometric defects,residual stresses,elastic-plastic properties of steel and end constraints.The experimental observation shows that the actual measured ultimate bearing capacity of the compression bar is higher than the buckling load determined by the geometric length of the compression bar.The key reason for this phenomenon is that it is difficult for the supports at both ends of the compression bar to achieve the ideal hinged state,and the actual strong constraint of the supports reduces the calculated length of the components,thus improving the stable ulti-mate bearing capacity of the steel compression bar.According to the traditional component stability theory,a re-verse calculation method of length is proposed through the load-displacement relationship in the elastic stage of the overall stability bearing capacity test of compression bar.The correctness of this method is verified by relia-ble finite element model analysis.This method is applied to the actual test data analysis of the overall stable bearing capacity of steel compression bars,which not only reasonably explains the test phenomena and results,but also eliminates the influence of different bearing forms on the overall stable bearing capacity of steel com-pression bars.The relevant conclusions can provide reference for the experimental research on the overall sta-bility bearing capacity of steel compression bars.关键词
计算长度反推法/钢压杆/整体稳定承载力/有限元分析Key words
reverse method for length calculation/steel compression bar/overall stability bearing capacity/finite element analysis分类
建筑与水利引用本文复制引用
熊晓莉,李璐,管欣旺,李飞平..计算长度反推法在钢压杆整体稳定试验中的应用[J].河南城建学院学报,2024,33(4):58-64,79,8.基金项目
国家自然科学基金(51308194) （51308194）
河南科技攻关项目(212102310562) （212102310562）
