鋼異形柱穩(wěn)定性及動(dòng)力分析研究
[Abstract]:When steel structure is adopted in residential design, H-shaped steel is generally used in the structural system, which will make the column angle of the structure stand out in the room, occupy certain indoor space, affect the beauty of the building, and is not easy to use. To solve this problem, engineers designed a special shape steel column, such as L-shaped steel special-shaped column, T-shaped steel special-shaped column, cross-section steel special-shaped column, and cross-section steel special-shaped column. It can solve the problem of the angle of the column protruding in the room. Therefore, the study of steel special-shaped columns can not only enrich its theoretical knowledge, but also promote the development of steel structure housing industrialization in China, which has both theoretical and practical significance. However, at present steel special-shaped columns are seldom used in steel residential buildings, and their design and calculation methods need to be improved. This paper is mainly based on the formula for calculating the stability bearing capacity of L-shaped steel special-shaped columns. The advantages of its application in steel structure residence are discussed. In this paper, based on the previous research results, the buckling analysis of L-shaped steel special-shaped columns under axial compression is carried out by using finite element analysis software, which verifies the correctness of the formula for calculating the stability bearing capacity of axial compression. The stability curves of L-shaped steel special-shaped columns are obtained and compared with the BFC stability curves given in the specification. The buckling analysis of the improved L-shaped steel special-shaped column is carried out, and the load-carrying capacity of the modified L-shaped steel special-shaped column is compared with that of the L-shaped steel special-shaped column. At present, the mechanical characteristics and seismic behavior of steel special-shaped column frame system are not clear, but the current research results are basically carried out on the common section of columns, rarely involving the research on the seismic behavior of steel special-shaped columns. In order to study the seismic behavior of steel special-shaped column structure system, the models of H-section steel column frame structure, L-section steel special-shaped column frame structure and improved L-section steel special-shaped column frame structure were established by using finite element analysis software. Modal analysis and dynamic time history analysis under earthquake action are carried out to compare the vibration pattern of three kinds of structures, the trend of peak acceleration, the change trend of maximum floor displacement and interstory displacement angle, and the seismic performance of the three structures are evaluated. Finally, the problems of steel special-shaped columns that need further research are put forward, and the future development trend is prospected.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TU391;TU311.3
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