建筑钢结构进展2024，Vol.26Issue(6)：84-93,10.DOI:10.13969/j.cnki.cn31-1893.2024.06.009
间断焊接包管加固圆钢管构件轴压极限承载力研究
Ultimate Bearing Capacity of Circular Steel Pipes Reinforced by Wrap Pipe with Discontinuous Welding Under Axial Compression
摘要
Abstract
To study the axial compression performance of the steel pipes reinforced by wrap pipe with discontinuous welding,13 groups of specimens were designed for monotonic loading static test.The ultimate bearing capacity,failure mode,load-displacement curve and section strain development law of the specimens were analyzed.The influence of reinforcement under load and non-load on the ultimate bearing capacity of the specimens was compared.The results show that the failure modes of the wrapped pipe specimens can be divided into overall instability failure and strength failure of the inner tube extension section.The inner and outer pipes of the wrapped pipe specimen work collaboratively and bear loads together,and the inner and outer pipes all reach the overall instability failure after yielding.The ultimate bearing capacity of reinforced specimens under load and non-load is basically the same,with a difference of 2.2%.The ultimate bearing capacity of reinforced specimens under non-load is 479.9%higher than that of unreinforced specimens.According to the test results,the ABAQUS finite element model of the wrapped pipe specimens was modified,and the model was used to analyze the influence law of the main influencing factors on the ultimate bearing capacity of the wrapped pipe specimen.An empirical formula for calculating the ultimate bearing capacity of the wrapped pipe specimens was proposed,and the calculation results were in good agreement with the experimental results.关键词
间断焊接/包管加固/极限承载力/轴压/破坏模式/计算公式Key words
discontinuous welding/reinforced by wrap pipe/ultimate bearing capacity/axial compression/failure mode/calculation formula分类
建筑与水利引用本文复制引用
孟文清,严珮珮,崔邯龙,张亚鹏,张陆旭,王超..间断焊接包管加固圆钢管构件轴压极限承载力研究[J].建筑钢结构进展,2024,26(6):84-93,10.基金项目
国家重点研发计划(2018YFF0300201) （2018YFF0300201）
