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建立长期结构健康监测基准和评估体系十分必要。通常,现场试验数据和有限元模型是建立基准的两个关键手段。首次引进伸缩支承的概念,建立包括温度变化的弯曲后张预应力钢筋混凝土桥梁基准现场数据库。数据库来源于未破坏试件的全年监测数据。通过有限元模型建立监测基准。对有限元模型修正的方法,包括材料性能的标定、弹性支承单元的使用、箱梁Mindlin板单元被最新的裂缝Mindlin板单元的置换以及桥的使用状态进行细化。通过有限元模型得到的基准结果与现场测试的基准结果非常吻合。所提出的结构健康监测基准能够进行实时破坏监测,建立监测技术以及进行状态评估。
It is necessary to establish long-term structural health monitoring benchmarks and assessment system. In general, field test data and finite element models are two key tools for establishing a baseline. The concept of telescopic support was introduced for the first time to establish a baseline on-site database of post-bending prestressed reinforced concrete bridges including temperature changes. The database is based on annual monitoring data of unsanctioned specimens. Establish monitoring benchmarks using finite element models. Finite element model correction methods, including the calibration of material properties, the use of elastic support elements, the box girder Mindlin plate elements are replaced by the latest crack Mindlin plate element replacement and the use of bridges are refined. The benchmark results obtained from the FE model are in good agreement with the benchmark results from the field tests. The proposed benchmark for structural health monitoring enables real-time damage monitoring, establishment of monitoring techniques, and status assessment.