道路桥梁损伤的评定和维护对策分析

The Analysis of Assessment and Maintenance on Road and Bridge Damage

由于外在、内在的原因,道桥在使用过程中,经常出现结构损伤,或者损伤积累。桥梁损伤不仅会对桥面交通产生影响,而且会对桥梁内部结构造成威胁。然而,常规桥梁承载能力试验,健康监测技术都不能准确地检测出桥梁脆性破坏程度。在损伤机理基础上出现的安全评定方法,可以对桥梁局部、整体和长期损伤程度进行检测,并给出损伤力学、疲劳断裂、可靠度等方面的评定结果。本文通过对桥梁损伤的实际情况,内部结构损伤程度,分析桥梁损伤问题,并提出相应的维护、管理对策。

Bridge in the use of the process will be different levels of structural damage, which will not only affect the normal passage of the bridge, but also a threat to the bridge structure. However, the conventional bridge bearing capacity test, health monitoring technology can not accurately detect the degree of brittle failure of the bridge. The safety assessment method based on the damage mechanism can detect the local, global and long-term damage degree of the bridge, and give the evaluation results of damage mechanics, fatigue fracture, reliability and other aspects. This paper takes city cross the bridge as an example, on the basis of the actual bridge safety assessment results, combined with the damage degree of the structure proposed corresponding maintenance and management countermeasures and bridges to ensure the safe use.