钢管高强混凝土叠合构件受剪承载能力试验研究  

EXPERIMENTAL STUDY ON SHEAR CAPACITY OF RC MEMBERS WITH PREFABRICATED HIGH-STRENGTH CONCRETE FILLED STEEL TUBE CORE

作　　者：杨勇[1] 孙东德 张超瑞 薛亦聪 陈阳[1] 于云龙[1] YANG Yong;SUN Dong-de;ZHANG Chao-rui;XUE Yi-cong;CHEN Yang;YU Yun-long(Department of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710054,China)

机构地区：[1]西安建筑科技大学土木工程学院

出　　处：《工程力学》2019年第8期182-191,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51578443);陕西省科学研究计划项目(2011kjxx42);西安市科技计划项目(CXY1432(5))

摘　　要：结合3个普通钢筋混凝土构件和11个钢管高强混凝土叠合构件的单调加载静力试验,对钢管高强混凝土叠合构件的破坏形态、破坏机理和受剪承载能力开展研究。通过分析破坏特征与荷载-跨中挠度曲线,重点对钢管尺寸、剪跨比和是否焊接栓钉对叠合构件受剪承载力的影响进行分析。试验研究结果表明:试件发生剪切斜压和剪压两种破坏模式;试件的受剪承载力随钢管尺寸的增加而提高;随剪跨比的增大而降低;焊接栓钉可提高试件的承载能力,但作用有限。依据现有规范并结合试验结果,基于桁架-斜压场模型提出了钢管高强混凝土叠合构件的受剪承载力计算公式,其计算结果与试验结果吻合较好。Based on the cyclic loading experiments of three RC members and eleven encased CFST members with a prefabricated high-strength concrete filled steel tube core,the failure pattern,failure modes and shear bearing capacity of the members were thoroughly investigated.On the basis of the failure characteristic and the measured load-deflection curves,the effects of steel tube size,shear span ratio and welding studs on the shear bearing capacity of the members were critically examined.The results indicated that the specimens suffered diagonal-compression failure and shear-compression failure.The shear capacities increased with the increases of aspect ratio,and it was effective to improve the shear capacity by welding studs.Based on the existing specification and test results,truss-arch theory was applied here to analyze the shear capacity of the members.The results obtained from the proposed method agree well with those of pertinent experiments.

关 键 词：钢管混凝土叠合构件 高强混凝土芯柱 受剪承载力 试验研究 桁架-斜压场模型 

分 类 号：TU398[建筑科学—结构工程]