Research Onseismic Performance Of The High-rise Building With Beam Converter Layer

It is said that architecture is a key sign of human civilization.ModernHigh-rise building could be considered as the most intuitive way to indicate a state’s capacity in the respect of economy and socialization.In the 21 st century, the global economy has reached to a new levels well as the building techniques, the function and facade of architecture has also been improved. It is common to have facade complex, multi-functional integrated large span and high-rise building in the modern society. Among them, there is a form of high-rise building, which aims to combine the high-rise residential buildings and public space, namely, the lower part of the structure to meet the frame structure using large space requirements, while its upper structure of shear wall can provide greater rigidity structure improve the overall stiffness of the building structure. In order to meet the demand on such functions, these types of buildings are often achieved by setting conversion layer. In order to coordinate the upper and lower structural rigidity mutation this shortcoming. And one of the most common beam transfer layer, because it has a direct force transmission, transfer path clear and easy to calculate, etc., and have been widely used structural engineers. In the high-rise building designs, we usually see the seismic capacity of the structure is particularly important, so for the high-rise building structure, the structure in the face of the earthquake, when the reliability of the key in the key become. According to existing norms, the high-rise building structure with a conversion layer structure type are complex, for seismic analysis of such structures to work for the structure response spectrum analysis and time history analysis, the former are intended for dynamic analysis, which is the dynamic analysis.Based on the theoretical study with beam conversion layer structure, and selected one real project of beam transfer layer of tall buildings do some research and analysis, the specific contents are as follows:1.Select the appropriate engineering practice, combined with its structural construction plans, the establishment of the engineering calculation model instance in high-rise building structural analysis software ETABS, a dynamic analysis of the structure of the proposed use of modal response spectrum analysis, obtained by computational analysis Performance data structure: Structure from between vibration period, floor displacement, the elastic layer displacement angle, shear floor to study the dynamic characteristics of the earthquake in the bi-level action, and get relevant laws;2. Select three seismic waves(both natural wave, an artificial wave) as a test table input acceleration using time history analysis structure linear dynamic analysis of structure in the three seismic waves each vertex displacement-time curve and the base shear force-time curve, comparative study of its time curve variation of the response spectrum analysis results complement and confirm, and time history analysis results obtained with the response spectrum analysis results were compared according to regulatory requirements;3. Based on the analysis of engineering examples, to change its position conversion layer disposed floors(increased sequentially from the third to the fourth floor, five), create three different engineering calculation model, comparative analysis of the structure of performance data(period, displacement, stiffness, shear) changes, the draw relevant law.After the study, comparative analysis of three engineering calculation results obtained the following conclusions:1.Since the variation of the structure of the oscillation period is: conversion layer to set the height rise, showing a natural cycle of growth trend. Note Conversion layer provided the higher floors, the lower the overall stiffness of the structure. And one, two, three modes for the horizontal earthquake played a major role in control, as the height increases conversion layer that higher modes of action will become clear;2.The variation of the interlayer displacement structure is as follows: set the height increase conversion layer, layer displacement showing growth trend. And in the vicinity of the conversion layer will be different degrees of drift mutation, which is caused by two reasons, one frame support partial conversion layer below the floor bigger than the upper part of the story, and the second for the frame conversion layer below support part softer than the superstructure;3.The variation between the elastic layer structure displacement angle is: highly elevated conversion layer is disposed between the drift angle showing the rise, and the maximum displacement angle between the layers will appear floor conversion layer is provided with a high degree of increase And down. In addition, the interlayer displacement angle curve in the vicinity of the conversion layer will be a "turning point", indicating that the stiffness conversion layer upper and lower floors of the structure, there is some discontinuity benefit changes;4.Shear compare three models show floor, the upper and lower shear wall structure of the frame structure of the transfer of the shear layer both been minor mutations, which shows the vertical structure due to inconsistencies in the conversion of the due generate increased stiffness increases shear. You can also see the base shear structure decreases with increasing conversion layer set position, which is due to structural rigidity to reduce earthquake by making smaller, thereby reducing the base shear;5.The maximum top displacement peak three engineering models are produced at the T2 waves, indicating T2 wave seismic effect for the three models more strongly;6.The base shear force, the response spectrum method and time history analysis of the results of analysis is different, this is because the role of the different effects of seismic waves with a building structure is different, so the result is different, but the results are controlled within a range of 65% and 80% limits of two specifications. Displacement between floors and layer displacement angle comparison showed the results and reaction in the RG spectrum of seismic waves near the top of the results(3% or less), the results under the T2 response spectrum of seismic waves and the result is close to the lowest.