配筋空心方钢管高强混凝土轴压中长柱有限元分析  

Finite Element Analysis of Reinforced Hollow HighConcrete Filled Square Steel Tube Medium andLong Columns under Axial Compression

作　　者：杨志坚[1] 崔维哲 李帼昌[1] YANG Zhijian;CUI Weizhe;LI Guochang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第5期810-819,共10页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52178148,51808353);辽宁省优秀青年基金项目(2021-YQ-10);辽宁省教育厅项目(LJKZ0598)。

摘　　要：目的 研究配筋空心方钢管高强混凝土轴压中长柱受力性能,改善传统空心钢管混凝土的力学性能,并为该类型柱的设计及试验研究提供依据。方法 基于有限元分析软件ABAQUS,对配筋空心方钢管高强混凝土轴压中长柱的力学性能进行有限元分析,在分析受力全过程的基础上,重点分析长细比、钢管宽厚比,混凝土强度、钢管强度、管桩类型、配筋率等参数对轴压力学性能的影响,并基于统一理论提出承载力计算公式。结果 配筋空心方钢管高强混凝土轴压中长柱各组分之间组合作用良好,内置管柱、增大钢管宽厚比、减小长细比及缩小夹层混凝土强度与管柱混凝土强度差距可以改善构件的延性、提升构件组合作用;笔者提出的修正公式计算结果精确且安全。结论 提高配筋空心方钢管高强混凝土的钢管强度、增大宽厚比、减小夹层混凝土与管柱混凝土强度差距可有效改善空心钢管混凝土脆性破坏,充分发挥构件的性能。In order to improve the mechanical properties of traditional hollow concrete filled steel tube columns,finite element analysis of the axial force performance of reinforced hollow high strength concrete filled square steel tube columns was carried out using the finite element software ABAQUS,based on the analysis of the whole force process of reinforced hollow high strength concrete filled square steel tube members.The effects of parameters such as length to slenderness ratio,steel tube width to thickness ratio,concrete strength,steel tube strength,type of pipe pile and reinforcement ratio on the axial compressive mechanical properties were focused on,and the load carrying capacity correction formulae were proposed based on the unified theory.It is found that the member combination of reinforced hollow high strength concrete filled square steel tube axial compression medium-length column is better,and the built-in pipe column,increasing the width-thickness ratio,reducing the length-thinness ratio and narrowing the strength gap between the interlayer concrete and the pipe column concrete can significantly improve the member ductility and enhance the combined effect,and the proposed bearing capacity calculation formula is accurate and safe.

关 键 词：PHC管桩 空心柱 方钢管 有限元分析 中长柱 

分 类 号：TU398[建筑科学—结构工程]