Seismic Behavior Analysis Of L Laminated Slab Shear Wall Structure

Shear wall is the shear component for a large number of high-rise buildings,from the current point of view,the construction of China's wall is still dominated by on-site pouring,but the sharp growth of population and urbanization,accelerate the construction speed has become a priority among priorities,especially in speeding up the industrialization of construction and urban construction.And how to improve the engineering quality of buildings,buildings can be increased the length of use and reduce the construction difficulty,construction site cost and damage to the environment that we have to seek a new shear wall assembly type shear wall.For this new type of structure,is the main problem of seismic component nodes and seams and under earthquake of different forms,aspect ratio,axial compression ratio of the superimposed slab shear wall seismic performance,at the same time,some special eccentric component in the asymmetric torsion problem.The paper uses the method of combining numerical simulation with experiment,comprehensive effect analysis of L type superimposed slab shear wall structure in the compression ratio and the ratio of height to width,the shaft,the failure mechanism of composite wallboard,bearing capacity,ductility and energy dissipation structure difference.By applying cyclic loading of specimens is carried out from the wall cracks,the failure mechanism of shear wall structure;through the analysis of the hysteretic loops,skeleton curves,the mechanical properties of the index;through the analysis on the component ductility coefficient,energy dissipation coefficient,study on seismic performance of structure.The main research contents of this paper:(1)finite element analysis software ABAQUS is used to simulate and simulate the L type composite slab shear wall structure model with unequal height to width ratio.Damage in the form of comparison of eight groups of different aspect ratio of the wall model in the plastic stage the bearing capacity,stiffness degradation,ductility and energy dissipation capacity of the size and structure of the component difference,to analyze and compare the various stages of high aspect ratio of height to width of damage in the form of optimal structure component ratio range.(2)the same specifications of the models have different internal structure,the internal structure of the solution of the different has two main types: the combination of internal reinforcement and different arrangement on both sides of the precast slab and the cast-in-place board.In this paper,the main consideration is the combination of precast slab and the cast-in-place board,combined with the local standards of Anhui province"superimposed slab concrete shear wall structure technology regulations"(No.DB34810-2008);the national standard "prefabricated concrete building technical standards(number:(GB/T 51231-2016),now there are two kinds of main structural form.The combination of precast slab and cast-in-place slab will cause the failure mechanism of structural members.In this paper,the difference of bearing capacity between the two types of precast slab and cast-in-place slab composite shear wall with L type under reciprocating load is discussed,which provides a theoretical basis for practical construction.(3)more regular buildings in under the horizontal earthquake generally does not appear to reverse effect,but when the building is irregular or irregular structures under earthquake will get obvious torsion effect.The torsion of the structure will produce torque,the torque exists mainly in the form of shear stress,and generally shear failure,so the torsion effect is more dangerous than the translation.In this paper,a large scale finite element software ABAQUS is used for elastoplastic analysis.The establishment of L two the same size and form of reinforcement and structural form have the same super imposed slab shear walls model,but the edge constraint in structural components of different NW-1: there is no boundary constraint,NW-2 does not occur out of plane displacement and Rotation,that is,the freedom to control the direction of the Y.Then establish two identical cast in place models NW-3,NW-4,NW-3,without any edge constraint,NW-4 does not occur outside the plane displacement and rotation.In comparison with normal earthquake,analysis of four groups of wall model in the plastic phase,the bearing capacity,stiffness degradation and ductility,and find the structural components in the effects of torsion in the failure position and specific failure modes,find the weak position of the structure in the actual production.Through the above research,this paper aims to get a different aspect ratio,the seismic performance variation of axial compression ratio of L type superimposed shear wall structure,so as to grasp the characteristics of the seismic performance of the structure,to provide guidance for the design of L type super imposed slab shear walls,provide a theoretical basis for the construction.