【摘要】 为了解决以扭为主和以弯为主的钢筋混凝土弯扭构件的分析模型不统一问题,建立了改进的空间桁架模型.该改进的空间桁架模型是由4个平面桁架或由3个平面桁架和1个顶部斜压板组成的空心方管形截面构件.以此模型比拟钢筋混凝土弯扭构件,建立了分析模型的平衡方程和变形协调方程,通过引入顶面混凝土的开裂强度条件和破坏强度条件,提出了钢筋混凝土弯扭构件受力的全过程分析方法.与试验结果的对比表明,该方法既适用于以扭为主,也适用于以弯为主的弯扭构件,解决了扭型破坏与弯型破坏的不连续问题,该方法可用于任何扭弯比情况下的弯扭构件的全过程分析.更多还原

【Abstract】 To resolve the dissimilarity problem of analysis model in flexure-predominant and torsion-predominant reinforced concrete members,an improved space truss model was established.The model with tubular rectangle section is composed of four plane-trusses or three plane-trusses with a diagonal compression slab. By truss analogy to reinforced concrete flexure-torsion members,equilibrium equations and compatibility equations are set up,and by means of the strength condition in cracking and strength ultimate limit state of top concrete,analysis method of reinforced concrete members subjected to flexure-torsion loads during all loading history is presented.Comparison with test results shows this method can be used in both flexure-predominant and torsion-predominant members,and it solves the discontinuous problem from torsion-predominant to bending-predominant members or bending-predominant to torsion-predominant members.The method can be used in flexure-torsion members with any torque to flexure moment ratio.更多还原