Research On Influence Of Shear Wall Layout On Structural Performance In Frame-Shear Structure

In the frame-shear structure,whether the shear wall is arranged properly will largely determine the overall performance and economy of the structure.The arrangement of the shear wall in the frame-shear structure includes: the planar layout of the structure referred to in the conventional sense,and the height of the longitudinal arrangement of the shear wall.In order to make the research conclusions more general,this article combines two engineering examples to analyze and compare: the distribution area of the elevators in the engineering example 1 and the overall structural layout are symmetrical;the engineering example 2 is asymmetric.In this paper,the finite element analysis software SAP2000 is used to establish a calculation model for the engineering example.First,the calculation analysis and comparison are performed in the elastic phase of the structure;in order to ensure the accuracy and reliability of the model,the model is verified and statically calculated in the Paco-SAP program.Elastoplastic analysis.The effects of the change of the shear wall layout position,the shape of the shear wall layout,the longitudinal incomplete height of all shear walls,and the longitudinal incomplete height of some shear walls on the performance of the frame-shear structure were studied.Through the research on the influence of the change of the shear wall layout position on the structural performance,it is obtained that whether the plane layout of the structure is symmetrical or asymmetric,marginalizing the shear wall layout position can reduce the structural torsion and increase the structural Conclusions such as torsional stiffness.Through the study of the influence of the change of the shape of the shear wall layout on the structural performance,it is obtained that whether the plane layout of the structure is symmetrical or asymmetric,when the shape of the shear wall is L-shaped,the torsional stiffness of the structure will be reduced;The shape of the force wall arrangement is mainly asymmetric T-shape and symmetric T-shape,which will increase the torsional stiffness of the structure.Through the study of the influence of the longitudinal incomplete height layout of all shear walls on the structural performance,it is obtained that the layout of all shear walls is interrupted above the inflection point,and the overall torsional stiffness of the resulting structure is the largest in the model comparison analysis group.Its torsional effect is the smallest;when all shear walls are arranged at incomplete height,and the interruption position of the longitudinal arrangement of the shear wall is the upper part of the structure,it has little effect on the overall trend of the floor’s total shear curve of the structure.Through the research on the influence of the longitudinal incomplete height layout of the partial shear wall on the structural performance,it is obtained that: the longitudinal incomplete height layout of the partial shear wall has a greater influence on the column shear force of the structure than the wall shear force;the partial shear wall When the interruption position of the vertical arrangement height is located at the upper part of the structure and above the inflection point,it will be beneficial to the overall stiffness control of the frame shear structure.Then select models for static elasto-plastic analysis.Each model can obtain performance points,and meet the requirements of the code at the performance points.The seismic performance of each model structure meets the seismic fortification target of “big earthquake will not fall”.It is obtained through research that the longitudinal incomplete height arrangement of the shear wall in the frame-shear structure can be realized,that is,it is feasible to set the arrangement height of the longitudinal shear wall reasonably.