Evaluating Method Of Wall Importance Of Masonry Structural System Based On Elastic Plastic Deformation Energy

The existing component importance evaluation method can only reflect the structural elastic behavior under the action of small and medium earthquakes,or analyzes the performance of the structure during the elastoplastic stage and lacks the whole process analysis of the stress in the structure elastic-plastic stage.Confronted with sensation the whole process of looking for a reflection structure elastic-plastic stress characteristics of evaluation methods,this article based on the Pushover analysis of interlayer shear force-displacement curve and the bottom shear-vertex displacement curve,puts forward two kinds of the component importance evaluation method based on elastoplastic deformation energy,namely,deformation energy method and generalized deformation energy method.Design and the layer number of different intensity three masonry structures as an example,using method of generalized stiffness method,the load-bearing and deformation can importance component method,generalized deformation energy method for quantitative evaluation.Comparative analysis of four kinds of component importance evaluation method in different layers of different intensity calculation of masonry structure,can confirmed based on the elastic-plastic deformation of masonry wall importance index evaluation method is feasible.The reasons for the difference of evaluation results are analyzed from different methods,and Suggestions are given for the application of the four methods.The main research results are as follows:(1)The importance evaluation method based on elastoplastic deformation has a clear physical meaning,and the ultimate bearing capacity and ductility of elastic-plastic stage structure are considered.It reflects the mechanical characteristics of the whole structure and can reflect the contribution of the component after the structure enters the elastoplastic stage.(2)The generalized stiffness method,ultimate bearing method,generalized deformation energy method and deformation energy method can be applied to the masonry structure of low-intensity lower floors.With the increase of floor height,the generalized stiffness method is no longer applicable,and the ultimate bearing method and generalized deformation energy method should not be used to evaluate the intermediate floor.With improvement of fortification intensity,four methods for masonry structure wall importance indexes of evaluation has some reference value,but for the most important wall index value also should refer to the importance of deformation energy method.For the masonry structure of high-intensity high-intensity floors,it is suggested that the deformation energy method should be adopted to evaluate the importance indexes of the wall.(3)The wall with the highest importance index is located at the corner of the masonry structure,which not only bears a large vertical load.It provides a stable eccentric bending moment for the structure,effectively prevents the structure from overturning under the earthquake action,and should be highly valued in the design and reinforcement.In the horizontal direction,the higher the importance index of the outer wall,the higher the resistance structure.In the vertical direction,the higher the importance of the wall,the higher the importance of the wall,can ensure the vertical transmission.