【作者】 吴同乐；

【导师】 彭伟；

【作者基本信息】 西南交通大学 ， 结构工程， 2004， 硕士

【摘要】 由于具有良好的建筑功能，近年来钢筋混凝土异形框架柱结构得到了较广泛的应用。但作为一种较新的结构体系，其从未经受过地震的考验。对这种结构在大震作用下的弹塑性变形分析和抗震性能方面的评估方法和试验研究都存在不足。 目前异形柱截面非线性分析都只局限在轴压比、荷载角、箍筋间距、配箍率和混凝土强度等级等因素对截面延性的影响，而没有考虑长宽比对其的影响。本文除考虑以上各种因素外，还计入长宽比这种因素对异形柱截面延性的影响；然后采用数值积分方法通过MATLAB语言编程对异形柱截面进行非线性分析，得到了L形、T形和十形截面异形柱在上述各种因素下的曲率延性比，讨论了这些因素影响下的异形柱截面延性。通过对比分析，得出了柱截面延性较好的合理长宽比。 本文通过SAP2000程序对一个实际的异形框架柱结构和相同条件下的矩形框架柱结构进行了弹塑性静力分析(push-over)，得到了两种结构形式的底部剪力一顶点位移关系和楼层的层间变形结果以及塑性铰的出铰顺序和分布情况。分析表明，通过合理的结构布置，钢筋混凝土异形框架柱结构具有较好的延性和抗震性能。同时表明，相对于弹塑性动力分析的复杂性，对结构规则、高度较小的结构进行弹塑性静力分析(push-over)在目前是一种比较合理准确评估结构抗震能力的简化方法。更多还原

【Abstract】 Beause of good architectural function, R.C. frame structure with spacial-shaped conlumns has got relatively extensive application in the recent years. However, as a kind of comparatively new structural system, it has never experienced the test of earthquake. The evaluation method and research of the analysis of its nonlinear analysis deformation and the anti-seismic performance has shortages under large earthquake for this kind of structure.Currently in the section nonlinear analysis of spacial-shaped columns, the influence of section ductility has been only confined with factors such as axial compression ratio, load angle, stirrup space, the ratio of stirrup and concrete strength grade but without considering long breadth ratio. This paper will take account of long breadth ratio to the influence of section ductility in addition to consideration above other factors. Then the numerical integration method has been applied in the section nonlinear analysis by the MATLAB language and the curvature ductility ratio of L shape,T shape and + shape is calculated from it, and the influence of section ductility is argued under those factors. The reasonable long breadth ratio of the better ductile section is gained from the contrastive analysis.The nonlinear static analysis of a R.C. frame structure with special-shaped columns and a R.C. frame structure with rectangular columns under the same conditions by the progaram SAP2000 has got the relation of base shear -top displacement and the deformed results of the floors and the occurrence sequence of plastic hinges and their distribution. This paper suggests that R.C. framed structure with special-shaped columns has relatively good ductility and the anti-seismic performance if through reasonable structural arrangement. At the same time, it suggests that for the regularly structural and multistory building, the nonlinear static analysis is a currently reasonable and accurate simplified way that evaluates the anti-seismic performance of structure compared to the complexity of nonlinear dynamic analysis更多还原