铜瓦门大桥吊杆损伤对索力变化的影响研究  

Study on Effect of Suspender Damages of Tongwamen Bridgeon on Change of Cable Forces

作　　者：张龙[1] 谢官模[1] 

机构地区：[1]武汉理工大学理学院,武汉430070

出　　处：《交通科技》2014年第4期21-24,共4页Transportation Science & Technology

摘　　要：吊杆损伤是中承式钢管混凝土提篮拱桥的常见损伤。由于吊杆损伤对索力以及自振频率均有明显影响,所以吊杆损伤的定位以及定量分析对桥梁检测至关重要。文中以铜瓦门大桥为背景工程,在有限元基准模型的基础之上,采用弹性模量折减法计算分析典型吊杆损伤组合对全桥吊杆索力变化的影响,对获取的大量计算数据加以提炼总结,得到了对吊杆损伤评估具有参考意义的结论。Damages to the suspenders are common in half-through CFST X-arch bridges. Since the suspender damage will influence the cable forces and natural frequencies obviously, positioning the damage and analyzing the damage degree are important for bridge inspection. Based on the baseline finite element model of Tongwamen Bridge, Young＇s modulus reduction method is employed to simulate the cable force changes caused by the suspender damage. Numerical results are investigated and summa- rized, and the conclusions obtained are meaningful for evaluating the suspender damage of halfthrough CFST X-arch bridges.

关 键 词：钢管混凝土提篮拱桥 吊杆损伤 索力变化 有限元模型 弹性模量折减 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]