斜拉索退化机理及钢丝力学模型  

Deterioration Mechanism of Cables and Mechanics Model of Wires

作　　者：徐俊[1] 陈惟珍[1] 刘学[1] 

机构地区：[1]同济大学桥梁系,上海200092

出　　处：《同济大学学报（自然科学版）》2008年第7期911-915,共5页Journal of Tongji University:Natural Science

摘　　要：通过分析实桥锈蚀钢丝的断口特征,确定钢丝存在着3种失效模式,分别是均匀腐蚀与孔蚀、腐蚀疲劳、应力腐蚀.通过试验研究总结了钢丝力学性能随锈蚀程度变化的规律,将锈蚀钢丝建模为带单边裂纹的圆柱,并对钢丝的退化过程进行了模拟.Inspections of the fracture of corrosion wires from old bridge cables show that corrosion leads to three types of failure modes, which are general corrosion with pitting, corrosion fatigue and stress corrosion. Through experimental research, the degradation of the mechanical properties of corrosion wires is drawn. Furthermore, wires are modeled as a cylinder with mono-lateral crack. Based on this model, the damage evolution of corrosion wires is simulated.

关 键 词：拉索 孔蚀 应力腐蚀 腐蚀疲劳 退化钢丝力学模型 

分 类 号：U445.73[建筑科学—桥梁与隧道工程]