【作者】 张杜；

【导师】 叶献国；

【作者基本信息】 合肥工业大学 ， 结构工程， 2003， 硕士

【摘要】 近年来，异形柱框轻结构体系被越来越多的应用于工程实践中。本论文主要内容是对钢筋混凝土异形截面双向压弯柱(包括L形、T形、十字形柱)进行非线形全过程分析，在有关文献基础上考虑了受拉纵筋和周围混凝土的锚固滑移和混凝土应力—应变关系曲线的下降段，同时考虑到在箍筋加密区箍筋对混凝土的约束影响。通过异形柱截面的有限元单元网格划分，用数值方法编制了计算机分析程序，通过计算，可以得到以上各种截面柱的弯矩—曲率关系曲线，分析它们在延性和承载力等性能方面的差异。 本论文最后采用大型有限元程序州SYS5.7对上述几种截面柱构件也进行了分析，通过比较计算结果，得出异形截面柱延性变化规律，并检验本论文所编制分析程序的可靠度。更多还原

【Abstract】 Lightweight framed structures with special-shaped R.C. columns are applied more and more widely in recent years. The content of the paper is nonlinear analysis of complete response process for T, L-shaped and "+" shaped section R.C. columns under axial compression and biaxial bending. On the basis of related papers, the full path of stress-strain relation of concrete and the sliding of longitudinal reinforcement anchoring are all considered, simultaneously, the restriction effect for concrete by thickening of stirrups is also included. According to generating finite element model by meshing for special-shaped section columns, a computer program using the digital iteration method for full range analysis of special-shaped columns is complied. By the analytical results, ’M-φ"’ related curves are obtained, at the same time, differences of ductile behavior, and bearing capacity are analyzed.At last this paper also analyses special-shaped section columns subjected to biaxially eccentric loading using finite element program ANSYS5.7. According to comparing of analytical results, the ductile behavior of R.C. T, L -shaped and "+"shaped columns are investigated. The reliability of analytical program compiled in the paper is verified.更多还原