基于静力测试数据的装配式混凝土简支梁有限元模型修正

对一实际装配式预应力混凝土简支梁桥的工作状况进行了评估,根据现场实测静力数据,对其有限元模型进行修正。计算结果表明,修正后的有限元模型较好地反映了实际结构的变形行为。应用敏感性分析研究了修正模型的效率,分析表明,选择适当的修正方式有助于得到能准确反映实际结构工作状况的有限元模型。而不适当的修正方式尽管也可能正确反映实际结构的结构响应,但不能准确反映实际结构的结构参数。

Updating of Prefabricated Simply Supported Beam FE Model Based on Static Measurement

The service condition of a practical prefabricated prestressed concrete simply supported beam is assessed.Based on in-site static measurements,the structural FE model is updated.The numerical results demonstrate that the updated FE model can reflects the deflection behaviors of the real structure well.Moreover,the effectiveness of the updated models are studied by sensitivity analysis,which indicates that properly selected updating method will facilitate to get FE model capable of accurately reflecting working condition of the bridge structure,whereas improperly selected updating method will not be able to get FE model capable of reflecting structure parameters of the bridge even though it may reflect the structure response.