| Special-shaped column structure has the advantage of space-saving,it can be widely used in high-rise residential buildings,with good promotion prospects.Because of special-shaped column applicable structural height is small,for this problem,add the steel in the original reinforced concrete frame of shear wall structure with special-shaped columns to study the dynamic characteristics of steel reinforced concrete frame of shear wall structure with special-shaped columns,and hope to break the building maximum height restriction.In this paper,using the ANSYS to modeling and numerical simulation calculations.Firstly,using the same size to establishing a reinforced concrete frame of shear wall structure with special-shaped columns and a steel reinforced concrete frame of shear wall structure with special-shaped columns,and as the second structure a reference model,totally establishing fifteen models by changing the steel ratio,the shear wall thickness,the thickness of the slab,the ratio height to thickness of special-shaped column and the maximum structure height,studied influences of various parameters on the dynamic characteristics of steer reinforced concrete frame of shear wall structure with special-shaped columns by comparative analysis.Secondly,based on the second model,established a steel reinforced concrete frame of shear wall structure with rectangular columns by converting special-shaped columns into rectangular column,and time history analysis this model and the first two model using the same fortification amplitude seismic waves under the 45 angle direction,studied displacement and stress and strain of the beam-column joints.Finally,established simplified solid model,time history analysis this two model using the same fortification amplitude seismic waves under the 0 angle direction,studied displacement and stress and strain of the beam-column joints.It concluded as follows:1.Whether it is elastic or elastoplastic stage,after add the steel in structure,the structure stiffness is increased and improved structure seismic performance.The stress performance of special-shaped column's beam-column joints is improved.2.With the rate of steel,shear wall thickness,slab thickness and the ratio height to thickness of special-shaped column increased,the structure maximum displacement decreased and the structure stiffness is increased.These have some influence on the dynamic characteristics of the structure,and improved structure seismic performance.By changing the shear wall thickness can effectively reduce the special-shaped column internal force.3.The structure produce bending shear deformation.The shear walls and frame can effectively work together,but bending deformation is more than shear deformation.It shows that the shear wall bear most of the level of shear and the structure lateral stiffness mainly depended on shear wall.Each model's story drift can meet the specification requirements,and the structure can maintain good elastic properties.After add steel in structure,the structure maximum height increase of 15.5%.The structure maximum height has a great breakthrough.4.Compared to rectangular columns,special-shaped column's beam-column joints stress and strain is bigger and has weaker force performance.When people design frame of shear wall structure with special-shaped columns,the structure of the central beam-column joints and beam-shear wall joints should be to strengthen.Experimental results show that steel reinforced concrete frame of shear wall structure with special-shaped columns is superior to reinforced concrete frame of shear wall structure with special-shaped columns and need to enhance some weak point,for example beam-column joints. |
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