钢筋和GFRP筋混合配筋RPC梁受弯性能非线性分析  

Nonlinear finite element analysis of flexural behavior of reactive powder concrete beams reinfoeced with steel bars and GFRP bars

作　　者：王琨 商华杰[1] 徐冠普 时金雨 袁炳琨 WANG Kun;SHANG Huajie;XU Guanpu;SHI Jinyu;YUAN Bingkun(Hunan Province Engineering Laboratory of Bridge Structure,Changsha University of Science&Technology,Changsha 410015,China;College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China;Department of Civil Engineering,Harbin Institute of Technology(Weihai),Weihai 264209,China)

机构地区：[1]长沙理工大学桥梁结构安全控制湖南省工程实验室,湖南长沙410015 [2]扬州大学建筑科学与工程学院,江苏扬州225127 [3]哈尔滨工业大学(威海)土木工程系,山东威海264209

出　　处：《混凝土》2021年第9期25-32,共8页Concrete

基　　金：长沙理工大学桥梁结构安全控制湖南省工程实验室开放基金资助项目(16KD01);国家自然科学基金项目(51878589);江苏省“六大人才高峰”人才项目(2017-JZ-038);扬州市科技计划项目(YZ2018068)扬州大学研究生实践创新计划(XSJCX20_023,YSJCX20_013)。

摘　　要：基于ABAQUS平台,分别建立了钢筋活性粉末混凝土梁和GFRP筋活性粉末混凝土梁的有限元数值模型,对文献中的试验梁进行有限元模拟验证。同时设计了钢筋和GFRP筋混合配筋活性粉末混凝土梁的有限元分析方案并建立数值模型,进行受弯性能非线性分析,考察了模拟梁荷载-跨中挠度曲线等模拟结果,对模拟得出的荷载-跨中挠度曲线从4个方面进行分析,并进行模拟梁受力全过程分析研究;基于条带法和共轭梁法编制了钢筋与GFRP筋混合配筋活性粉末混凝土梁的计算程序,获得了模拟梁的荷载-跨中挠度曲线图,与ABAQUS有限元模拟结果进行对比,进一步验证ABAQUS有限元数值模型的合理性。推导并建立了钢筋和GFRP筋混合配筋活性粉末混凝土梁开裂弯矩和正截面受弯承载力的计算式,将公式计算结果与ABAQUS模拟结果进行对比,发现吻合较好,表明所建立的公式可用于计算分析。Based on ABAQUS platform,the finite element numerical models of RPC beams and GFRP RPC beams are established respectively,and the test beams in the literature are verified by finite element simulation.At the same time,the finite element analysis scheme and numerical model of the reinforced and GFRP reinforced reactive powder concrete beams are designed,the nonlinear analysis of flexural performance is carried out,the simulation results of the load midspan deflection curve of the simulated beams are investigated,the load midspan deflection curve obtained from the simulation is analyzed from four aspects,and the whole process of the simulated beam stress is analyzed and studied based on the strip method The program of reactive powder concrete beam reinforced with GFRP and steel bars is compiled by the conjugate beam method.The load midspan deflection curve of the simulated beam is obtained,which is compared with the results of ABAQUS finite element simulation to further verify the rationality of ABAQUS finite element numerical model.The calculation formulas of cracking moment and flexural capacity of normal section of RPC beams with reinforcement and GFRP reinforcement are derived and established.The comparison between the calculation results of the formulas and the ABAQUS simulation results shows that the formulas are in good agreement,which shows that the formulas can be used for calculation and analysis.

关 键 词：混合配筋 活性粉末混凝土 GFRP筋 ABAQUS 正截面受弯承载力 

分 类 号：TU528.01[建筑科学—建筑技术科学]