Seismic Performance Analysis Of The High-rise Building With Transfer Story

With the increasing number of high-rise buildings of modern society, because of its different functions, size has become increasingly complex and diversified, to meet the requirements of the building, high-rise buildings, mostly small bay of the upper apartment, the lower part of the large space requirements shopping malls, restaurants or entertainment, the lower the rigidity of high-rise buildings will become relatively small, but is the upper part of the stiffness will be increased, This requires conversion layer to change this situation, which will form the weak link high-rise building complex vertical structure mainly irregularities, including force characteristics and structural stability by converting member.Papers with specific project examples, seismic analysis in accordance with the norms of performance-based seismic design requirements, through ETABS finite element analysis software, has been determined in accordance with the specification of the seismic performance goals. Examples of engineering conversion layer structure along the beam to do some research and analysis, research content and results are as follows:(1) With a beam of high-rise building complex conversion layer is the mechanical characteristics of the basic design, transfer beam, transfer columns, shear walls and floor conversion layer of the upper structure conversion layer and other components of the analysis, as well as regulatory compliance required to determine the actual project-sectional size of each member;(2) With a conversion layer frame supported shear wall structure using finite element software ETABS model, and calculated. Change the conversion layer where the different floors of height, analyze the impact of the period between the structure itself, displacements, story drift, assign each floor shear, overturning moment and vertex displacement, with increasing conversion layer location, period increased, the displacement increases, the rigidity becomes small;(3) Force conversion layers because of the different calculation assumes floor and there is a certain influence, in the model by assuming rigid floor slab and the elastic analysis of internal forces on structural frame pillar, since conversion layer at the use of elastic floor, resulting in the lower part of the shear distribution of shear walls and floor frame pillar affected, resilient floor assume more realistic project, so a more reasonable calculation assumes elastic floor;(4) When the height of the fixed conversion layer is located, change the conversion and cross-sectional dimensions of the beam lower switching layer structure layer frame struts, Effect of the conversion layer and the lower portion of the overall stiffness of the seismic performance of structures. The lower part of the greater rigidity, its seismic performance is better.