Shear Capacity Analysis Of Assembled Monolithic Precast Prestressed L-shaped Short Shear Wall

Short-leg shear wall rises as a new lateral force-resisting member recently. This structureis popular with real estate developers because it can overcome some shortcomings such as theconvex of column in the frame structure and the general shear wall with a small hole and itslarge dead weight. Short-leg shear wall structure is generally used for designing smallhigh-rise residential system nowadays.With the quick advance of China’s modernization, the pattern of construction ofindustrialization and the housing industry have become the pursuit of development goals ofChina’s construction industry. Assembled monolithic shear wall structure that is a kind ofideal structure in engineering has many advantages such as fast construction speed, highefficiency, little noise pollution, little labor intensity, low cost and good integrity, which iswidespread pro-gaze in the engineering sector. The prestressed technology with the way ofpost-tensioned adopted connecting the prefabricated component as a whole, not onlyimproves the crack resistance and the overall stiffness of the structure, but also reaches thecarrying capacity of cast-in-place structure. Compared with the cast-in-place structure,Short-leg shear wall structure has more technical and economic advantages.In this paper, the experimental result is simulated by finite element analysis softwareANSYS, the deviation of which is15.92%. Than we further simulate and analyze theperformance of the force and destruction of properties about prestressed short-leg shear wall.The specific contain and conclusion of research as follows.(1) The prestressed L-shaped short shear-leg wall models that is in different axialcompression ratio are loaded in the horizontal direction. The result shows that the shearcarrying capacity will increase while the ductility reduces with the axial load ratio increasing.The component shows good characteristics of ductile fracture and a higher carrying capacitywhen the component is in the axial compression ratio of0.3, while the stiffness will degradeand the ductility will significantly reduce when axial load ratio is greater than0.3.(2) The prestressed L-shaped short-leg shear wall model that is in different axialcompression ratio are loaded in the horizontal direction. Deformation law is researched underthe positive and reverse horizontal loads, the result explains that horizontal displacement of short-leg shear wall will reduce as the axial compression ratio increases and horizontaldisplacement of flange increases from corner to end of wall limb. The outcome of researchproves that L-shaped short-leg shear wall produces not only shear deformation but also twistdeformation.(3) The prestressed L-shaped short-leg shear wall model whose sectional depth-thickratio is classified as4,6and8are loaded in the horizontal direction. The bearing capacity andfailure mode are researched under the positive and reverse horizontal loads. After analyzingthe results of simulation, the conclusion is that the horizontal bearing capacity will increase asthe sectional depth-thick ratio rises. Short-leg shear wall damages mainly happen in the cornerand the bottom of the wall limb, some measures should be taken to strengthen the carryingcapacity of these locations when designing the structure.(4) The prestressed L-shaped short-leg shear wall model that is in different effectiveprestress are loaded in the horizontal direction. The result shows that the bearing capacity ofshort-leg shear wall is improved by the increasing of effective prestress, but the ductility willdecrease.(5) According to experimental data and the results of simulation and analysis, theformula about L-shaped short-leg shear wall whose section is asymmetric is put forwardconsidering the influence of effective prestress.