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预应力混凝土连续梁桥是中小跨度铁路、公路桥梁的主要桥型,对既有预应力混凝土连续梁桥进行损伤识别,可以有效地预防恶性交通事故的发生。将有限元模型修正技术应用到桥梁及结构工程的损伤识别在近几年得到了迅速的发展。静力测试是桥梁工程中应用最为普遍的一种结构测试方法。本文根据静力测试结果,应用有限元模型修正技术,对一两跨预应力混凝土连续梁的结构损伤进行了识别。计算结果表明,经损伤识别后,结构的理论计算位移与试验测试结果吻合良好,经理论分析得到的损伤发展趋势正确地反映了由试验所得的预应力混凝土连续梁的结构行为。研究结果表明,本文的研究方法可以有效地用于实际工程结构的损伤识别,有着广阔的工程应用前景。
Prestressed concrete continuous girder bridges are the main bridge types of medium and small-span railway and highway bridges. Damage identification of existing prestressed concrete continuous girder bridges can effectively prevent the occurrence of serious traffic accidents. The application of finite element model correction technology to bridge and structural damage detection has been rapidly developed in recent years. Static test is the most common structural test method used in bridge engineering. According to the static test results, the structural damage of one or two prestressed concrete continuous beams is identified by the finite element model correction technique. The calculated results show that the theoretical calculated displacement of the structure agrees well with the test results after damage identification. The trend of damage development theoretically analyzed correctly reflects the structural behavior of the prestressed concrete continuous beams. The research results show that the research method in this paper can be effectively applied to the damage identification of the actual engineering structure, and has a broad prospect of engineering application.