The Seismic Behavior Analysis And Numerical Simulation Of Structure With High Girder Transfer Layer

In this paper,the seismic performance of the high-order beam conversion layer has been analyzed and expanded again.An engineering model of T shaped cross section is taken as an example in this paper to establish four finite element models,which are located at the level of 3,5,6 and 7 respectively and the number of stories is 17.The following are the research and analysis of this paper:(1)In this paper,the dynamic characteristics and seismic performance of the high-order beam conversion layer are analyzed by changing the position of the structure.The first step is the modal analysis of the structure in order to compare the dynamic performance of each model.It is the second step that using the mode decomposition response spectrum method to analyze the structure in order to understand the seismic performance index including the maximum inter story displacement angle,the maximum displacement value of the floor,the floor shear value.Through the comparison of the above parameters,the difference and the influence of the location of the beam conversion layer on the seismic performance of the structure is summarized.(2)Introduce the concept of the inter-story displacement angle ratio and elaborate its advantages.It provides a simple and convenient parameter for engineering designers to judge the lateral resistance of structures.By changing the different design parameter of beam conversion layer,we can find the rule of the inter-story displacement angle ratio and equivalent stiffness ratio between two adjacent layers.Based on the su mmary,the range of coefficient about ratio of the displacement angle of the inter-story displacement angle ratio in high transfer layer is given.(3)The relationship between the changing floor thickness and beam stiffness amplification coefficient is researched.By changing the thic kNess of the floor slab and the change in the stiffness amplification factor has established seven plan,explore its influence on the seismic behavior and the interlayer displacement angle ratio and equivalent stiffness ratio.(4)The model of two groups that the inter-story displacement angle ratio are 0.81 and 1.0 is established.The beam conversion layers of each model are 3,5,6and7 respectively.By comparing the influence of the height change of the beam conversion layer on seismic performance under the same inter-story displacement angle ratio and by comparing the influence of the increase of the inter-story displacement angle ratio on the seismic performance of structures under the same conversion layer,we can find out the control effect of the inter-story displacement angle ratio on the beam conversion layer structure.(5)The elastic-plastic dynamic and static analysis of the beam conversion layer is carried out on the six story high position transfer structure.Then give the evluation of seismic performance of the conversion layer in the rarely occurred earthquake.Finally,some suggestions and measures are given for the results of the elastic-plastic dynamic and static analysis.