Research On Seismic Behavior Of Concrete-filled Double Skin Composite Shear Wall With Opening

Concrete-filled double skin composite shear wall with opening is applied preliminarily in high-rise and super high-rise buildings because of its high capacity and good seismic performance.In this paper,rectangular multi-partition concrete-filled double skin composite shear wall and concrete-filled double skin composite shear wall with opening were combined to propose a new type of rectangular multi-partition concrete-filled double skin composite shear wall with opening(referred to as common concrete-filled double skin composite shear wall with opening),at the same time,the concept of tubed steel reinforced concrete column was inducted into concrete-filled double skin composite shear wall with opening to form a new type composite shear wall by reserving slit gap at the jiont of the top of the composite shear wall and the floor(referred to as tubed concrete-filled double skin composite shear wall with opening).These two type composite shear wall are all able to meet the requirements of not only bearing capacity and stiffness of structure but also the hole for door or window,which have good seismic performance.In addition,the skin plate of concrete-filled double skin composite shear wall with opening can make the surface of composite wall smooth and shorten the construction period as template and the filled concrete can play the role of insulation and sound insulation.In view of the above reasons,concrete-filled double skin composite shear wall with opening has a good application prospect in high-rise and super high-rise buildings.But how to optimize parameters and what's the seismic performance of tubed concrete-filled double skin composite shear wall with opening under different seismic waves is a problem that needs to be solved before it is applied to engineering practice.The main works of this paper are listed as follows:1.In order to verify the feasibility and rationality of using ABAQUS to simulate the seismic behavior of concrete-filled double skin composite shear wall with opening,ABAQUS is used in this paper to establish a finite element model of concrete-filled double skin composite shear wall with opening,which has the same size parameters as an existed experimental model.By comparing the initial stiffness,yield load and the peak of capacity of the finite element analysis and the experimental analysis under the same loading condition,the maximum error is within the acceptable range,so this paper considers that it is feasible to simulate the seismic behavior of concrete-filled double skin composite shear wall with opening structure by using ABAQUS.2.In order to optimize the parameters of concrete-filled double skin composite shear wall with opening,ABAQUS is used in this paper to establish finite element model of a one-storey concrete-filled double skin composite shear wall with opening,and study the effects of the thickness of steel plate(TS),strength of steel(SS),strength of concrete(SC),entrance form(EF),axial compression ratio(ACR),height of steel plate(HS),rib plate spacing(RPS),thickness of concrete(TC)and the ratio of height to thickness(RHT)on the hysteresis behavior of concrete-filled double skin composite shear wall with opening under horizontal cyclic loading by comparing and analyzing stress nephogram,plane displacement diagram,hysteretic curve and skeleton curve,the purpose of changing HS is verifying the optimum reserved slit gap width in concrete-filled double skin composite shear wall with opening.Analysis results show that TS,TC and RHT influence the initial stiffness and bearing capacity of the composite shear wall significantly,and SC,EF,ACR,HS and RPS have little effect on the the initial stiffness and bearing capacity of the composite shear wall,and SS has no effect on the the initial stiffness and ductility of the composite shear wall but has great influence on bearing capacity of the composite shear wall.3.In order to study the seismic behavior of tubed concrete-filled double skin composite shear wall with opening,ABAQUS is used in this paper to establish finite element model of ten-storey common concrete-filled double skin composite shear wall with opening and ten-storey tubed concrete-filled double skin composite shear wall with opening with different thickness,of which the seismic behavior under different 8 d egree frequent,8 degree rare and 9 degree rare seismic waves is analyzed through time history analysis then.The analysis results show that under different seismic waves,the variation of seismic response curve is similar to that of the input seismic wave,but there is a phenomenon of peak lag;The seismic response of the structures is not only related to the intensity of earthquake and the type of structures,but also to the form of the input seismic wave;The effect of height to thickness on s eismic response is not large under frequent earthquake waves,and the effect of height to thickness on seismic response of tubed concrete-filled double skin composite shear wall with opening is not large but on s eismic response of concrete-filled double skin composite shear wall with opening is more obvious under rare earthquake waves.The peak of acceleration response of tubed concrete-filled double skin composite shear wall with opening is smaller than concrete-filled double skin composite shear wall with opening with the same ratio of height to thickness under different seismic waves,which explains that the seismic behavior of tubed concrete-filled double skin composite shear wall with opening is better;There is no damage occurred in these two kinds of structures under different seismic waves.