钢异形柱稳定性及动力分析研究

发布时间：2018-10-13 10:52

【摘要】：在住宅设计中采用钢结构时，结构体系一般采用H形钢，这会使得结构的柱角在室内突出于墙面，会占用一定的室内空间，影响建筑的美观，不便于使用。为了解决这个问题，工程师们设计出了一种特殊形状的钢柱，如L形截面钢异形柱应用于角柱，，T形截面钢异形柱应用于边柱，十字形截面钢异形柱应用于中柱，就能解决柱角在室内突出的问题。所以对钢异形柱进行研究，不仅可以丰富其理论知识，而且可以推动我国钢结构住宅产业化的发展，具有理论和现实的双重意义。但目前钢异形柱很少应用于钢结构住宅中，还有待完善其设计计算方法，本文主要是在已得到的L形截面钢异形柱稳定承载力计算式的基础上，探讨将其应用在钢结构住宅中的优势。本文在翻阅前人研究成果的基础上，采用有限元分析软件，对L形截面钢异形柱进行了轴压荷载作用下的屈曲分析，验证了轴心受压稳定承载力计算式的正确性，做出了L形截面钢异形柱的稳定性曲线并与规范中给定的b、c类稳定性曲线进行了比较。对改进的L形截面钢异形柱进行了屈曲分析，并与L形截面钢异形柱的承载能力进行了比较。目前对钢异形柱框架结构体系的受力特性和抗震性能尚不明确，而目前的研究成果基本上都是在普通截面形式的柱上进行的，很少涉及对钢异形柱抗震性能的研究。为研究钢异型柱结构体系的抗震性能，利用有限元分析软件分别建立H形截面钢柱框架结构、L形截面钢异形柱框架结构和改进的L形截面钢异形柱框架结构的模型，进行模态分析和地震作用下的动力时程分析，比较三种结构的振型图、顶点加速度变化趋势、楼层最大位移和层间位移角变化趋势，对三种结构进行了抗震性能评价。最后，提出了钢异形柱仍需要进一步研究的问题，并对其未来的发展趋势进行了展望。
[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.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391;TU311.3

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