内置非贯通型钢STRC柱压弯承载力计算研究  

CALCULATION ON COMPRESSION-BENDING CAPACITY OF THE STRC COLUMN WITH BUILT-IN NON-THROUGH SECTION STEEL

作　　者：王秋维[1,2] 赵航 史庆轩 王璐[1] WANG Qiu-wei;ZHAO Hang;SHI Qing-xuan;WANG Lu(College of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an,Shaanxi 710055,China;College of Civil Engineering,Shaanxi Polytechnic Institute,Xianyang,Shaanxi 712000,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]结构工程与抗震教育部重点实验室(西安建筑科技大学),陕西西安710055 [3]陕西工业职业技术学院土木工程学院,陕西咸阳712000

出　　处：《工程力学》2023年第11期179-189,205,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51878543,51878540);陕西省教育厅科学研究计划项目(20JS078)。

摘　　要：采用内置型钢短柱对钢管约束钢筋混凝土(STRC)柱节点进行增强。为明确该节点中内置非贯通型钢STRC柱的控制截面位置及压弯承载力,进行了内置不同长度型钢STRC柱及无型钢对比试件的拟静力试验及有限元模拟研究,分析了试件的受力机理及压弯承载力,探讨了型钢长度和钢管约束等因素的影响。研究结果表明:随着内置型钢长度增加,破坏截面有从型钢-混凝土过渡截面转移至柱根的趋势;增大钢管径厚比会削弱其抗弯贡献,从而减小过渡截面压弯承载力,影响破坏截面位置。基于试验及有限元分析结果,提出柱根及过渡截面压弯承载力计算模型,建立内置型钢临界长度的确定方法,研究结果为STRC柱的设计及节点中型钢的参数确定提供理论依据。The steel tubed reinforced concrete(STRC)column joints are strengthened using built-in section steel.To clarify the position of control section and compression-bending capacity of the STRC column with built-in non through section steel in the joint,the quasi-static test and finite element simulation were carried out on the STRC columns with different lengths of built-in section steel and the comparison specimen without section steel.The mechanical mechanism and bearing capacity of the specimens were analyzed,and the effects of the length of section steel and confinement of steel tube were discussed.The results show that with the increase of the length of the built-in section steel,the failure section tends to transfer from the steel-concrete transition section to the column root.Increasing the diameter thickness ratio of steel tube will reduce the compression-bending capacity of steel tube and transition section and then affect the location of failure section.Based on the test and finite element analysis results,the calculation models of compression bending capacity of the column root and transition section are proposed,and the determination method of critical length of section steel is established.The research results provide a theoretical basis for the design of STRC column and joint with built-in non-through section steel.

关 键 词：钢管约束钢筋混凝土(STRC)柱 内置非贯通型钢 抗震性能 数值模拟 压弯承载力 

分 类 号：TU398.9[建筑科学—结构工程]