Analysis Of Mechanical Properties To L-type Short Shear Wall

Short-leg wall (SLW) is defined as the shear wall with a ratio of section depth to width being 5-8. usually, the section width is 200-250mm, and the depth is between 1000 and 2500mm. it is an intergradation's structure style between erase-section-column frame and convention shear wall structure. This kind of structure form bases on convention shear wall structure and draws on the advantage of framework. So it has become the most important structure form for high-stories residence projects.Nowadays the SLW structure is widely used for its versatile advantages on architecture and structure mechanism in residence projects all over the country. But it is short of enough experimental and theoretic bases, which cumbers SLW's healthy development. Moreover, even the promulgated National Code on Reinforced Concrete Structure gives no items on SLW design. In this paper, through nonlinear finite element analysis by using ANSYS software to simulate the shear wall test so as to theoretically discover the internal force regularity distribution of L-style SLW under horizon loading. And provide a scientific basis for actual engineering design.The main achievements of the dissertation are listed as following:1. According to the development of high-stories residential system and the characteristics of short shear wall, summarized the status quo of short shear wall and the theory progress of reinforced concrete structure nonlinear FEM. This paper's purpose of study based on short shear wall by the choice of concrete and reinforced constitutive relationship.2. Using finite element analysis method, the simulation test was done on L-type short shear wall. Horizontal monotonic loading experiments are carried out on six specimens, and limbs thick ratio are 5, 6.5 and 8, axial compression ratio is 0.2, 0.4 and 0.1. By nonlinear analysis, mapping the test load-displacement curve, damage cracks and stress images, revealed L-type short shear wall's basic work performance and distribution of internal forces, and then provide theoretical date for experiment.3. Repeated low-load test on four samples which limbs thick ratio are 5 and 6.5. Describing specimens' damage characteristics, cracks extension and drawing hysteretic curve under the Low-repeated load cracking.4. Compared Test results to simulation results, at last, the influence of axial compression ratio and limbs thick ratio to internal force distribution are obtained.