剪切变形对荷载—挠度分析的影响  

Effect of shear on load-deflection analysis of reinforced concrete beams

作　　者：熊志伟[1] 张川[2] 黄守忠 

机构地区：[1]中国建筑西南设计研究院有限公司,四川成都610081 [2]重庆大学土木工程学院,重庆400045 [3]中国建筑第八工程局,上海200120

出　　处：《四川建筑科学研究》2009年第4期27-30,共4页Sichuan Building Science

摘　　要：利用自编的基于修正斜压场理论和割线刚度法的非线性截面分析程序,对多伦多大学所做的一系列集中加载简支梁进行了荷载—挠度曲线分析。将试验曲线与考虑剪切变形的计算曲线、不考虑剪切变形的计算曲线三者进行了对比分析。分析结果表明,对于剪跨比小于5的简支梁,在荷载—挠度分析中,不能忽略剪切变形对挠度的贡献;而对于剪跨比大于7的简支梁,剪切变形对荷载—挠度曲线的影响并不显著,可以忽略其作用而近似当作纯弯考虑。A load-deflection analysis for a series of simple support beams tested at the university of Toronto is presented in the paper. The program used is based on the MCFT and secant stiffness formulation. Then comparison among test curves, caculated curves not including shear and caculated curves including shear was done. The results show that effect on the deflection can not be neglected of simple supported beam whose shear span ration is smaller than 5 ; and not the same for simple supported beam whose shear span ration is larger than 7.

关 键 词：修正斜压场理论 截面分析 简支梁 荷载-挠度曲线 剪跨比 

分 类 号：TU375.1[建筑科学—结构工程]