基于监测数据的中小跨径混凝土梁式桥有限元模型修正方法研究

摘要

浙江省的桥梁中绝大多数是中小跨径混凝土梁式桥，目前国内外对该类型桥梁基于监测数据的有限元模型修正方法研究较少，直接影响着桥梁安全评估的准确性和可靠性。首先论述有限元模型修正的必要性及长大桥梁常用的模型修正方法；其次提出适合中小跨径混凝土梁式桥有限元模型修正的技术，最后在依托工程预警值分析过程中进行应用，验证该方法的实用性和有效性。研究结果可广泛应用同类型桥梁，具有较大的理论意义和工程实用价值。%The majority of bridges in Zhejiang Province are medium and short span bridges , in which the main structural form is concrete girder bridge. However ,the study on finite element model updating method for medium and short span girder bridges based on monitoring data is less ,which seriously affects accuracy and reliability of bridge safety evaluation. Firstly ,this paper discusses the necessity of finite element model updating and the most common used method in long-span bridges. Secondly ,a proper technique of finite element model updating for medium and short span girder bridges is proposed. Finally , the method is used on the agglomeration stiffness analysis of the project construction , through which the practicality and effectiveness is verified. The result can be applied to the same type bridge ,and it is very important in theoretical significance or the practical engineering value.