拱桥吊杆病害及桥面铺装无损更换标准研究

从桥梁事故灾害出发，重点分析了拱桥吊杆常见病害，对吊杆更换保证桥面铺装不开裂条件及控制方法进行了研究，提出了由正常使用设计荷载建立桥面铺装不开裂，控制桥面标高的计算方法。结合实际桥梁吊杆更换，按照此方法进行计算，得出了更换吊杆时桥面标高变化不超过10mm的控制标准，经过实际工程应用，表明结果是合理和安全的。此研究为实现桥面铺装不开裂提供了理论依据。

Arch Bridge Hanger Diseases and Replacement Control Standards

In view of bridge disaster risk accidents, usual diseases of arch bridge hanger are analyzed, and the conditions to ensure bridge no-cracking of deck pavement and the control method during hangers change are researched. The calculation method for bridge deck elevation control according to no cracking of bridge pavement under normal service load is brought forward. Based on the actual hanger change project, the control standards for elevation variation limit of 10 mm during hanger change are obtained through calculations from the established methods in this paper, and its rationality and security are testified through the example. The conclusion in this paper provides theory basis for hanger change with no cracking of bridge pavement.