预应力型钢混凝土梁-角钢混凝土柱框架节点核心区受剪承载力研究  

Shear Capacity of Joints of Prestressed Steel Reinforced Concrete Beams to Angle-steel Concrete Columns

作　　者：王琨[1,2] 时金雨 徐冠普 顾明君 WANG Kun;SHI Jinyu;XU Guanpu;GU Mingjun(College of Civil Science and Engineering,Yangzhou University,Yangzhou,China,225127;Jiangsu Hanjian Group Company Limited,Yangzhou,China,225127)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]江苏邗建集团有限公司,江苏扬州225127

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第2期254-262,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51878589,51508495);2018年江苏省“双创计划”资助项目;2018年扬州市“绿扬金凤计划”资助项目;中国博士后科学基金项目(2019M651762);扬州大学2020年研究生实践创新计划(YSJCX20_013,XSJCX20_023);扬州大学优秀青年骨干教师人才项目(2016)。

摘　　要：目的提出预应力型钢混凝土梁-角钢混凝土柱框架节点核心区受剪承载力计算公式,实现此类节点的工程应用。方法建立预应力及非预应力型钢混凝土梁-角钢混凝土柱框架中节点试件的数值模型,并与试验结果对比,研究预应力度、轴压比、型钢腹板厚度、钢板配箍率及角钢配钢率对试件柱顶水平荷载-曲线和节点核心区剪力-剪切变形的影响。结果提高预应力度、角钢配钢率和型钢腹板厚度以及配箍率均可一定程度提高节点核心区的受剪承载力,其中腹板的厚度对抗剪承载力影响最明显;随着轴压比的增加,节点的抗剪承载力增加并不显著,但水平峰值荷载对应的位移在减小,下降段延性在降低。结论建立了预应力型钢混凝土梁-角钢混凝土柱框架节点核心区的抗剪承载力计算公式,公式计算结果与试验结果吻合较好,可应用于工程设计。Based on parameter analysis,to study the influence of pre-stress,axial compression ratio,web thickness,steel hoop ratio and angle steel ratio on the horizontal load-curve of the specimen column and the shear-shear deformation in the core area of the node.A formula for calculating the shear bearing capacity of the core area of the prestressed steel concrete beam-angle steel concrete column frame joint is proposed.The numerical model of the node specimens in the prestressed and non-prestressed steel concrete beam-angle steel concrete column frame was established and compared with the test.As result,increasing the degree of prestress,the ratio of angle steel distribution,the thickness of the section steel web and the ratio of hooping can all improve the shear bearing capacity of the core area of the node to a certain extent.The thickness of the web has the most obvious influence on the shear bearing capacity;With the increase of compression ratio,the shear capacity of the joint is not significantly increased,but the displacement corresponding to the horizontal peak load is decreasing,and the ductility of the descending section is decreasing.The calculation formula for the shear bearing capacity of the core area of the prestressed steel concrete beam-angle steel concrete column frame joint is established,which is in good agreement with the experimental results.

关 键 词：预应力 型钢混凝土梁 角钢混凝土柱 受剪承载力 框架节点 

分 类 号：TU318[建筑科学—结构工程]