The Finite Element Analysis Of Short-Leg Shear Walls With A Flange And Special Shaped Column

In the new century, China's national economy will be sustained and rapid growth, growing urbanization, the urban population soared. To meet people's increasing demand to live and work and make full use of limited urban land resources, the development of affordable high-rise buildings is an inevitable trend. special-shaped column frame structure and short-leg shear walls structural system saves both energy and reduce the weight of buildings, increase the use of space to meet the needs of functional changes. So these two structural systems are widely used in our multi-layer, high-rise residential buildings. This paper model of short-leg shear walls and special-shaped column frame structure model, using well-known engineering analysis software MIDAS GEN two-structure model for analysis and comparison. Using large-scale finite element analysis software ANSYS, shaped columns and short-leg shear walls were cracking simulation components.This paper has the following aspects:First, the application of MIDAS software structure of reinforced concrete short-leg shear walls, shaped columns frame the two models shaped an overall analysis, the ratio of shear wall structure shaped column frame structure with better performance.Second, by using ANSYS finite element software for different wall thickness ratio analysis of specimens can be seen as the thickness ratio changes from 4 to 6 the wall shear cracking load, yield load and ultimate load with high thick ratio increases. The ultimate displacement thickness ratio was 5.5 in the vicinity of a maximum value. Pier wall thickness ratio is an important factor affect model ductility.Third, select the shaped columns walls and short-leg shear walls. shear walls SW4 and SW6 limb changes in the wall of their limbs, respectively, the flange width of the wall pier axial compression ratio, even higher than the cross-beam, with beam reinforcement ratio, concrete intensity level were studied. Reasonable cross-height ratio on the structural safety and economy are important. shaped columns wall SW4 comprehensive capacity than the 2.8 is better, short-leg shear walls is a cross-limb SW6 high ratio of 1.33 is better. With the coupling beam reinforcement ratio of components increases, the cracking load is essentially the same, the yield load, ultimate load of beams with reinforcement ratio increases. Comparison of the displacement and ductility, short-leg shear wall component found in even the beam reinforcement ratio increases, the components of the enhanced ability to resist deformation, ductility decreases. Improve the concrete strength, short-leg shear walls can increase the cracking load, yield load and ultimate load. With the strength grade of concrete components increased, the displacement of the specimen a peak on the curve. Deformation of the specimen increased within a certain range, but then dropped significantly. With the increase in flange width can increase the ductility and load-carrying capacity of the wall, the wall shear stiffness after cracking the wall pier along with the flange width increases. Thus, the use of the wall with a flange limb can be greatly improved plastic properties of the wall to increase its energy dissipation capacity under earthquake. axial compression ratio of about 0.3 shaped column specimens and the axial compression ratio of 0.5 is better overall performance short-leg shear walls. In the axial compression ratio within a certain range, you can increase the axial compression ratio, while achieving improved specimen open load, ultimate load and maximum displacement values, but the axial compression ratio due to certain restrictions.