Behavior Of Lightweight Concrete Shear Walls After Reinforce

May 12,2008 occurred in Wenchuan 8.0 Richter earthquake caused heavy casualties and property losses,including a large number of damaged buildings and caused the collapse of property damage and casualties in the main vector.Therefore,pre-earthquake seismic requirements do not meet the housing and post-earthquake damage but does not constitute a dangerous reinforcement to repair housing,is very necessary.Took place in the world previous earthquake,the brick and frame structure on the earthquake resistance of the poor,severely damaged,it is very difficult by structural restoration and re-use.The framework wall structure and stiffness of shear wall structure has a large,space overall,and steel were higher than the province,the level of the structure of vertex displacement and story drift is usually less able to meet the requirements of seismic deformation,etc.,after the earthquake damage less,many structures can be restored after the re-use.Lightweight aggregate concrete as a result of high-strength,high durability,as well as seismic,thermal insulation,fire protection features such as advantages,and the use of lightweight aggregate concrete in place of plain concrete structure can reduce weight,reduce the structural cross-section size,to improve or increase the level of long-span structures,hence are widely used in civil construction industry and other industries.In this paper,five lightweight aggregate reinforced lightweight aggregate.concrete shear walls for seismic reinforcement were studied.The objective is to identify earthquake-damaged reinforced lightweight aggregate concrete wall of the feasibility study on reinforcing method of reinforced shear wall strength,stiffness,stability and performance of cracking damage.During the trial on the basis of the failure mechanism of shear reinforcement for the theoretical analysis,the introduction of the corresponding formula for calculating the intensity.In this paper,the specimen has suffered for five simulated earthquake forces reinforced lightweight aggregate concrete wall.Wall reinforcement and the original wall is similar to using the test methods,reinforcement of abdominal wall is to remove the concrete crushing and re-mold casting sticks.Experiments focused on measuring the displacement of the apex of the wall-the level of force hysteresis curve,the response reinforced the value of careful observation of the cracks as well as the combination of surface to carry out the work.Steel yielding before the loading process the use of load control,after yielding,the load deformation control.This article also applied to large-scale finite element program ANSYS software to simulate the reinforced concrete wall in order to further study reinforced lightweight aggregate concrete wall stress and deformation.