型钢混凝土深梁受剪性能及承载能力研究  

STUDY ON SHEAR BEHAVIOR AND BEARING CAPACITY OF STEEL REINFORCED CONCRTE DEEP BEAMS

作　　者：陈步青 曾磊[1] 刘昌俊 莫金旭 CHEN Bu-qing;ZENG Lei;LIU Chang-jun;MO Jin-xu(School of Urban Construction,Yangtze University,Jingzhou 434023,China;School of Civil Engineering,Guangzhou University,Guangzhou 510003,China)

机构地区：[1]长江大学城市建设学院,荆州434023 [2]广州大学土木工程学院,广州510003

出　　处：《工程力学》2022年第9期215-224,共10页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51978078)。

摘　　要：为了研究型钢混凝土深梁的受剪机理,以剪跨比、型钢截面高度比、翼缘宽度比为影响因素,设计7个试件进行了跨中集中荷载作用下的抗剪性能试验,对受力过程、荷载-位移曲线、破坏形态、受剪承载力等进行了比较分析,基于修正压力场理论提出了型钢混凝土深梁受剪承载力计算模型。结果表明:剪跨比是型钢混凝土深梁破坏形态主要影响因素,较大翼缘宽度比的试件具有更高的受剪承载力;基于修正压力场理论的计算模型能够综合考虑剪跨比和翼缘宽度比的影响,模型计算值与试验结果吻合较好。In order to study the shear behavior of steel reinforced concrete(SRC) deep beams,seven SRC deep beams subjected to mid-span loading were tested.The failure pattern,load-displacement curves and deformation characteristics were recorded to investigate the failure mode and strength of the specimens of different shear span ratio,height ratio(steel web height to beam height) and,flange width ratio(steel flange width to beam width).Based on the modified compression field theory,a formula for calculating shear bearing capacity of SRC deep beams are developed,considering the influence of steel flange.The calculation results indicate that:the model not only consider the effects of shear span ratio and flange width ratio on shear strength synthetically,but also the calculated values obtained by the model are in a good agreement with the experiment values.

关 键 词：型钢混凝土 深梁 修正压力场理论 受剪承载力 翼缘宽度比 

分 类 号：TU398[建筑科学—结构工程]