| From 2003 to 2011,the team of Zhong Shusheng of Chongqing University conducted a large number of component tests on the seismic performance analysis of the frame-supported short-limb shear wall inclined column conversion structure,and evaluated the overall seismic performance of the structure.However,due to the limitations of the test itself,more detailed parametric analysis of the structure under high loads and its impact on various seismic performance indicators require numerical simulation to analyze.In the finite element numerical simulation analysis,the analysis of the frame-supported short-leg shear wall inclined column type transfer structure is still not perfectThe content of the research topic in this article is mainly for the team test component W9-4.On the basis of the overall evaluation of the test,ABAQUS was used to further analyze the seismic performance of the W9-4 full-scale model under the high axial compression ratio of the wall limb,mainly from the component skeleton curve,Ductility coefficient and failure mode are carried out in three aspects.First of all,this paper makes numerical simulation and experimental comparison fitting of the skeleton curve and corresponding load displacement index of W9-4 to verify the accuracy of ABAQUS simulation,and then makes a detailed orthogonal to a single wall limb in W9-4 After analysis,the effects of limb thickness ratio,column longitudinal reinforcement and stirrups on the seismic performance of the wall limbs are obtained.Based on this,the nonlinear substructure of W9-4 is limited to non-linear under high axial compression ratio.Meta-analysis.Finally,further modifications were made to the components that did not satisfy the conceptual design failure sequence,and the proposed control values for the axial compression ratio of the frame pillar and the longitudinal rib amplification factor of the frame pillar were proposed.Through ABAQUS simulation calculation of the test piece,the following conclusions can be concluded : 1)The seismic performance of T-shaped short-limb shear walls designed in accordance with the current specifications deteriorates as the limb thickness ratio increases.The reason is that the size of the confined column is regulated by the specification so that when the limb thickness ratio of the wall limb is changed between 6 ～ 8,the size of the restrained edge member is unchanged.Therefore,the greater the thickness ratio of the limbs,the smaller the relative size of the constraining edge members,and the worse the seismic performance;2)The restraint effect of the stirrups of the wall limbs restraining edge members on the concrete becomes stronger at high axial compression ratios.By increasing the reinforcement of the stirrups,the T-shaped short limb shear wall can be effectively improved Shock resistance at axial compression ratio.3)When the inclined column is designed according to the axial compression column,the degree reserve is very high Sufficient,in order to avoid excessive changes in the stiffness of the transition layer and its adjacent layers,the size of the inclined column can be appropriately reduced;4)The ratio of longitudinal beam yield range of the coupling beam before the failure of the substructure The stirrup reinforcement area in the code is longer,so it is recommended that regardless of whether the beam span-to-height ratio is less than 5,the stirrup configuration should be configured according to the coupling beam,and the stirrup reinforcement should be configured for the full length;5)After the transition beam enters the elastoplastic stage The stirrups in the joint area will partly yield,and the concrete will show moderate damage,but the stirrups in the middle section are not yielded and the concrete damage is small.Therefore,the intermediate beam sections built outside the joint area of the inclined column of the conversion beam can relax the hoop properly.Reinforcement and reinforcement requirements can be designed according to normal frame beams;6)The component failure mode of the short-leg shear wall inclined-column conversion structure with a limb-thickness ratio of 6-7 under high axial compression ratios does not conform to the seismic concept design,but the axial compression ratio and longitudinal reinforcement amplification of the control frame pillars can make the components The failure sequence is in accordance with the conceptual design,and the seismic performance of the slant-column frame-supported short-limb seismic wall substructure becomes worse as the ratio of the thickness of the short-limb wall increases. |
