| Along with the rapid development in science and technology in modern society,high-rise building can be seen everywhere and become the symbol of a city. Tall buildings can perfectly use the vertical space structure and perfectly solve the problem of people's living and office. High-rise building form a frame structure, tube in tube structure and strengthening layer of high-rise building and so on. In recent years, the earthquake happened frequently, so the safety of the high-rise building face challenges. Wenchuan earthquake in 2008 made a lot of high-rise buildings collapsed and became the most important factors which endanger the safety of the people. In order to enhance the integrity of the structure and reduce the lateral displacement of the structure, strengthen layer often set in the structure. Different number of strengthen layer make high-rise building stress more even. but in the strengthening layer, force analysis is more complicated and easy to form a thin layer near the strengthening layer. Therefore, with strengthen layer between the framework of high-rise building structure or in the reasonable arrangement of strengthening layer, this is very effective for the whole building structure seismic.Now beam strengthening layer is generally used in high-rise buildings, reinforced concrete oblique abdominal rod braced for the lack of deep research, strengthening layer in-depth research of Chinese scholars in this area is needed and improved. Based on the previous research conducted on the basis of the following:1. The first chapter introduces the definition of high-rise buildings, high-rise building types and the characteristics of the high-rise building, and the different of a brief introduction of the structure of the system, points out the types and function of the strengthening layer, and the latest research situation, summarizes the strengthening layer working mechanism, advantages and disadvantages, and the significance of strengthening layer.2. Based on the province to build high-rise frame- core tube structure, for example,using the structural analysis software Midas to establish finite element model of the structure, and on the basis of the structure of the original model respectively to decorate a strengthening layer, two strengthening layer and three layer of five types of calculation model, and use the software to calculate the parameters of each model, in order to prepared for the next earthquake force performance analysis.3. Use different structure model for modal response spectrum analysis under seismicaction and get strengthened layer arranged on the original model and the structure of the natural cycle, interlayer displacement and interlayer displacement Angle of various parameters such as structure, through the analysis of the results of comparing the model,getting the optimal layout of strengthening layer of the structural model. Structure of the shear lag phenomenon for frame tube structure damage is serious, it need to strengthen the attention, as far as possible through the structure design scheme to alleviate the harm, or it will be an unsafe factor. In this paper, the strengthening layer of several models, the degrees of shear lag phenomenon in different models are discussed, in order to choose the structure arrangement scheme.4. Through the finite element software PKPM SATWE modules in different models of this structure, elastic time history analysis to complement structure design calculation. This article selects the three waves, using EPDA&PUSH in PKPM structure stress analysis, it is concluded that the structure of the bending moment and displacement, the changes of various parameters, such as through analysis and comparison of calculation results, the optimal layout of the strengthening of the high-rise building layers. |
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