The Critical Limb Length Shear Wall Structure Seismic Performance Analysis

When the wall of the shear wall limb section high thickness ratio greater than7.5but when less than8.5, the shear wall can be defined as the critical limb length shearwall, the wall limb section high thickness ratio greater than8.0critical limb lengthshear wall does not belong to this part of short limb shear wall, because therequirements of the cross section is consistent with the basic rules of common shearwall, and because of its limb length, not only reduced the construction cost, and isdecorated can be flexible. In high-rise residential buildings in recent years, thedomestic many places have adopted critical limb length shear wall structure system.But for this kind of structure, the domestic specification also no definite measures to beperfected.Based on a practical critical limb length shear wall structural engineering as anexample, through Midas building finite element model is set up and carry on thecalculation of structure, thus the structural static analysis and dynamic elastic-plastictime history analysis. Analysis the critical limb length shear wall structure at the sametime, mainly chooses the mechanics model of a certain extent analysed andsummarized. Also, different cross coupling beam were analyzed by using soft higherthan critical limb length shear wall structure seismic performance influence.This paper in order to explore such critical limb length shear wall structureseismic performance under severe earthquake, using finite element software Midasbuilding on critical limb length shear wall structure static elastic-plastic analysis,studies the nonlinear responses of the structure under the action of the rarely metearthquake and the damage situation, pointed out the weak position of the shear wallstructure, and compared with ordinary shear wall structure optimization designSuggestions are put forward. Through dynamic time history analysis method forcritical limb length shear wall structure seismic response under different earthquakewaves, the analysis of the horizontal displacement of each layer, interlayerdisplacement Angle time history results grouping comparison and inductive structuresunder different seismic wave cheng curve change rule of seismic response in a timelymanner.Across coupling beam in high-rise building structure, different ratio of the energy dissipation ability difference is bigger, in order to explore the different beam across thehigher than the critical limb length shear walls under the action of the rarely metearthquake seismic performance, using Midas building structure under different spanratio on static elastoplastic analysis, and according to the results of the analysis,optimization design is put forward.