钢筋混凝土剪力墙非线性数值模拟-防灾减灾工程及防护工程专业论文.docxVIP

摘要ABSTRACT 摘要 ABSTRACT This article discusses the history,current problems and future of numerical simulation technology of R．C structure especially the FEA method of plane stress problem．Introduces a new FEA model called CMM(cracked membrane model)in which bond-slip relationship is considered， The concealed bracing R．C shear wall is simulated by ANSYS in this article．Numerical results are compared with testing results．Influence of factors such as angle of concealed bracing bar,ratio ofconcealed bracing bar and concealed column on aseismic eapability is discussed． This article introduces a stress．strain relationship which considers multi—micro effects between reinforcing bars and concrete to FEM program aS the stress-strain model at gauss point． By using cracking model of CMM the problem that span of cracks is confined by size of elements iS solved．A method which doesn’t need t0 calculate element stiffness matfix iS educed by virtual work theory to get straight to remaining force．This method is combined with Newton--Raphson method to solve a general problem that implicit stress--strain relationship could not result in element stiffness matrix through integration equation．The ways to accelerate solving process is discussed． Based on what is mentioned before a FEM program called CMORC is developed which involves GUI pre．treatment and Dost-treatment module-n this article．Series of R．C shear wall tests conducted by Guangzhou University are chosen to calibrate the program．The pre—cracked validity of the program is verified by ANSYS．It’S proved that the program is cOITect．By CMORC more precision could get with less number of elements．Then a discussion of stress—strain，bond—slip，and moment—curvature results is given．Especially the real shear transfer coemcient iS computed．The results shows that rite shear transfer coemcient iS not a constant value through the geometry domain and is related with many factors．The coefficient presents a decrease trend with the crack width inc