STUDY ON STRENGTH OF STEEL CYLINDRICAL PIPES UNDER CYCLIC BENDING AND AXIAL LOADING.

钢圆柱管在循环弯曲和轴向载荷作用下的强度研究。

• 批准号: 07650560
• 负责人: CHU Kazuo
• 金额: $ 1.41万
• 依托单位: TOYOTA MATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650560/
• 关键词: DUCTILITY; STIFFNESS PIPE; CYLINDRICAL SECTIONAL STEEL PIERS; CYCLIC LOADING; NONLINEAR NUMERICAL ANALYSIS; 繰り返し載荷; 鋼製橋脚; ダクティリティー

In this paper ductility of cylindrical steel piers after buckling are discussed. Two kinds of piers are selected. one is normal steel piers and the others is stiffness ones. Two kinds of loading types are selected. One is monotonous bending and the other is cyclic bending. Experimental approach and monlinear analyzes are carried out.The result is that capacity of ductility under cyclic bending is considerable lower than the capacity under monotonous bending and that of stiffness steel piers is higher than that of normal steel piers. Maximum load of stiffness steel piers is larger than that of normal steel piers by 20%.Nonlinear analyzes are carried out for collapse steel piers in Great Hanshin Awaji Earthquake. The calculated models are normal cylindrical and stiffnes cylindrical sectional ones. The results are that the local buckling shapes of analyzed piers are agree with shapes of the experimental results.

本文讨论了圆柱形钢桥墩屈曲后的延性。选用两种桥墩。一种是普通钢桥墩，另一种是刚性桥墩。选择两种加载类型。一种是单调弯曲，另一种是循环弯曲。进行了试验方法和单线性分析。结果表明，循环弯曲的延性能力远低于单调弯曲的能力，刚度钢桥墩的延性能力高于普通钢桥墩。刚度钢桥墩的最大荷载比普通钢桥墩大20%。对阪神淡路大地震中倒塌的钢桥墩进行了非线性分析。计算模型有普通圆柱模型和刚度圆柱截面模型。结果表明，分析桥墩的局部屈曲形状与试验结果的形状一致。