随着公路交通的发展，对荷载等级及行车条件的要求不断提高，由于结构自然老化、车辆荷载增加，加上不利的环境影响以及养护维修欠缺，桥梁结构不可避免地会出现各种病害，各病害的发展状况和严重程度将会引起桥梁结构承载能力和耐久性降低，甚至导致桥梁结构使用功能衰退、运营状况不能满足规定的要求，既有桥梁的健康状况日益受到人们的关注。因此，分析桥梁结构的病害并对桥梁状况进行全面、准确的评定，对既有桥梁承载能力评定是桥梁安全性研究的重要内容之一。%Along with the development of highway traffic, the requirement for load grade and driving condition is in-creasingly becoming higher. Due to the natural aging, increasing vehicle load, the adverse environmental impact and the lack of maintenance and repair, various diseases inevitably arise in the bridge structure. The the severity of the disease would reduce the bearing capacity and durability of bridge structure. Therefore, it is of great importance for bridge safety research to analyze the disease of bridge structure and evaluate the status of bridge.
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