加筋混凝土梁抗剪承载力统一计算方法研究  

Study on Unified Calculation Method for Shear Strength of Reinforced Concrete Beams

作　　者：屈文俊[1] 何松洋 刘文博 QU Wenjun;HE Songyang;LIU Wenbo(College of Civil Engineering,Tongji University,Shanghai 200092,China;Power Transmission Structure Section,Southwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Chengdu 610000,China;Architecture Institute,China Airport Construction Group Corporation,Xi’an 710065,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国电力工程顾问集团西南电力设计院有限公司送电结构科,四川成都610000 [3]中国民航机场建设集团公司建筑所,陕西西安710065

出　　处：《铁道学报》2021年第6期173-180,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(51678430);国家重点研发计划(2017YFC0703003)。

摘　　要：加筋混凝土梁的抗剪筋布置形式是相同的,其筋材力学性能的差异,对其抗剪承载力的影响是肯定的。依据加筋混凝土梁抗剪破坏模式,基于经典修正压力场理论(MCFT)和钢筋混凝土构件的剪切原理,提出抗剪承载力模拟计算方法,建立相应的计算模型,依据文献试验数据验证了模拟方法的准确性。基于文献和相关规范的抗剪承载力计算公式,推荐了加筋混凝土梁统一抗剪计算公式的形式,通过2176根模拟实验梁的参数分析,建立了加筋混凝土梁抗剪承载力计算公式,并采用搜集的1194根已有试验梁数据证明了统一计算公式的有效性,可应用于实际工程的抗剪分析和设计。A calculation method for shear strength was proposed based on the classical modified pressure field theory(MCFT),the shear mechanism of reinforced concrete members,and different shear failure modes.Despite the similarity of the shear reinforcement layout in reinforced concrete beams,the mechanical properties are significantly different among various kinds of bars,which leads to differences in shear strength.It is necessary to put forward a unified calculation method for reinforced concrete beams.In order to get a reasonable formula,a three-parameter form of shear strength formula for reinforced concrete beams was proposed based on the code for design of concrete structures,and parameters were determined according to the numerical simulation analysis of 2176 RC beams.The proposed formula was verified with the data of the existing 1194 test RC beams collected and showed satisfactory accuracy,which can be applied to the shear analysis and design of practical engineering.

关 键 词：加筋混凝土梁 修正压力场 规范 统一抗剪计算方法 

分 类 号：TU318.1[建筑科学—结构工程] TU375.1