基于荷载试验数据修正桥梁结构有限元计算模型的研究

发布时间：2019-04-20 11:08

【摘要】：以浙江省长兴县上莘大桥为对象,采用一般方法建立桥梁分析的初始有限元计算模型,根据桥梁交工验收荷载试验采集的静、动载试验数据,通过建立考虑变形、频率及振型等静、动力信息的多目标函数对初始有限元模型进行修正,得到能够反映桥梁结构真实状况的基准有限元模型.修正后基准有限元模型计算结果与不同静载试验工况下实测数值、动载试验工况下实测振动频率、模态等响应结果进行了对比,结果表明:利用桥梁荷载试验实测数据对桥梁有限元计算模型修正后,有限元计算模型计算结果与荷载试验实测响应结果均能保持一致,利用荷载试验数据修正桥梁结构有限元计算模型是可行的.
[Abstract]:Taking Shangxin Bridge in Changxing County of Zhejiang Province as an object, the initial finite element calculation model of bridge analysis is established by general method. According to the static and dynamic load test data collected from the bridge acceptance load test, the deformation is considered by the establishment of the model. The initial finite element model is modified by the multi-objective function of static and dynamic information such as frequency and mode shape, and the reference finite element model which can reflect the real state of bridge structure is obtained. The calculated results of the revised benchmark finite element model are compared with the measured values under different static load conditions, the measured vibration frequencies and modal responses under the dynamic load test conditions, and the results are compared with those of the measured values under different static load test conditions and dynamic load test conditions. The results show that the calculation results of the finite element calculation model are consistent with the measured response of the load test after modifying the finite element calculation model of the bridge by using the measured data of the bridge load test. It is feasible to modify the finite element calculation model of bridge structure by load test data.
【作者单位】：长安大学公路学院;浙江交通职业技术学院路桥学院;中交第一公路勘察设计研究院有限公司;
【基金】：浙江省交通运输厅科技项目(2011H10)
【分类号】：U441

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