The Finite Element Simulation And Experimental Verification Of Ultimate Bearing Capacity Of Complex Cross Section Shear Walls

Shear-wall structures are widely used in High-rise buildings recently. The forms of shear-wall section include rectangle, T form, L form and complex cross section with flanges at both sides. Codes for the reinforcement design of shear-wall are not perfect currently. There are only design methods for simple cross sections but not for complex cross sections. So, when designing complex cross sections, we usually divide the shear-wall to some simple parts to design respectively. Because of not considering the shear-wall as a whole, this method has some problems in security and economy. For this problem, Pro Fu proposed an entire section design method. Based on Plane-section assumption, using integral method to get the load capacity of concrete, this method can be used in the designing of reinforcement for complex cross section shear-wall.To verify the rationality of the method proposed by Pro Fu, and study the work performance of complex cross section shear-wall, I use the finite element software and test to carry on the research. The contents, methods and conclusions of research mainly include the following three parts:First, static load test is implemented on two groups of groove section shear-walls. The main purposes are to study the distribution law of stress and strain in the section, to contrast the damage phenomenon and load capacity of shear-walls designed by traditional method and entire section design method respectively, and to study the problems when using traditional method;Second, ABAQUS finite element model of the shear-wall used in static load test is established to simulate the test, and contrast results with the static load test. The skeleton curves of two groove shear-wall structures are got from finite element simulation, and meet with the curves got by using entire section design method. The correctness of this method was verified. Besides, to study the contribution of the distribution reinforcement to the load capacity of the shear-wall, I simulate three groove shear-walls with different distribution reinforcement ratio, and get the load capacity skeleton curves to contrast. From contrast, I find that the contribution of distribution reinforcement to the load capacity is very small, and we can don t consider the distribution reinforcement when calculating the load capacity of normal section. The applicability of Plane-section assumption in complex cross section is also discussed in this paper; the conclusion is that the assumption can be used in calculating load capacity of normal section no matter the damage form is large bias or small bias.Third, the work performance of groove shear-wall under complex load is also studied here. The effect of shear load to the load capacity of normal section and the Plane-Section assumption is analysis. The conclusion is that the normal section load capacity can be decreased by the presence of shear load, and the provision for limits of shear-press ratio in code is also used in complex cross section shear-wall.