既有桥梁的静动力分析与鉴定评估

Static and Dynamic Analysis, Appraisal and Evaluation of Existing Bridge

既有桥梁的健康状况日益受到人们的关注,其承载能力评定是桥梁安全性研究的重要内容之一。兰州市西沙黄河大桥受周围环境和车辆超载的影响,桥梁的工作条件日益恶化,如梁体混凝土老化、裂缝开展、钢材锈蚀等。为此,通过静动力的理论分析和现场测试,根据相关规范对桥梁的一些主要指标进行了评估,为桥梁的养护和维修提供了必要的理论依据。

IThe health conditions of the existing bridges are more and more paid attention to the people. The evaluation of bearing capacity is one of the important contents of bridge safety study. Xisha Yellow River Bridge in Lanzhou City is subject to the influence from the surrounding environment and vehicle over-loading, so the working conditions for bridges are deteriorated day by day, such as ageing of beam body concrete, crack developing, steel material corrosion etc. Therefore, it makes evaluation of some main targets through static and dynamic theory analysis and site test and in accordance with the relative specifications so as to provide the necessary theory basis for the maintenance and repair of bridges.