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首页> 外文期刊>Structural engineering international >Finite Element Model Updating of Canonica Bridge Using Experimental Modal Data and Genetic Algorithm
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Finite Element Model Updating of Canonica Bridge Using Experimental Modal Data and Genetic Algorithm

机译：基于实验模态数据和遗传算法的Canonica桥梁有限元模型更新

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摘要

This paper calibrates the finite element model (FEM) of a tied-arch bridge using an automatic model updating procedure developed within two softwares. The former is used for sensitivity analysis and optimization analysis while the latter is responsible for structural modeling and eigenvalue analysis. An interface connecting two softwares is first developed, as well as the procedure to calibrate the FEM. Based on the original drawing and topographic survey, the FEM of the investigated bridge is created. To obtain the experimental modal parameters, eight global modes of the studied bridge are identified by ambient vibration tests and the frequency domain decomposition technique. Then, the sensitivity analysis and FEM updating procedure is conducted and the optimal structural parameters are identified. Finally, the updated FEM is verified by a series of static tests. Results show that the updated model could better represent the actual bridge. Therefore, the numerical model updated by the proposed procedure could be further used for damage identification of the bridge under service loads.
机译：本文使用在两个软件中开发的自动模型更新程序来校准系杆拱桥的有限元模型（FEM）。前者用于敏感性分析和优化分析，而后者则用于结构建模和特征值分析。首先开发了连接两个软件的接口，以及校准FEM的过程。基于原始图纸和地形测量，创建了被调查桥梁的有限元。为了获得实验模态参数，通过环境振动测试和频域分解技术确定了所研究桥梁的八个整体模态。然后，进行敏感性分析和有限元更新程序，并确定最佳结构参数。最后，通过一系列静态测试对更新后的FEM进行验证。结果表明，更新后的模型可以更好地表示实际桥梁。因此，通过该程序更新的数值模型可以进一步用于桥梁在服务载荷下的损伤识别。

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