基于荷载试验的圬工拱桥力学分析修正模型研究

MECHANICAL ANALYSIS CORRECTION MODEL OF MASONRY ARCH BRIDGE BASED ON LOADING TEST

以有限元分析模型参数更新理论为基础,提出一种基于荷载试验的圬工拱桥结构力学分析参数的识别方法。该方法参数更新的目标是使试验实测结构各力学效应与有限元模型计算所得理论值最为接近,进而识别出结构体系的各参数;经实例验证,用所提出的方法建立的有限元修正模型可实现对圬工桥梁结构力学效应的分析,从而可为同类桥梁结构承载能力评价和加固改造提供可靠依据。

A kind of identification method of structural mechanical parameters of masonry arch bridge based on loading test was proposed underlying finite element model parameter updating theory.The target of parameters updating is to make the field test response mostly close to theoretical calculated value.Then,the parameters of structure system can be identified.It was verified by the instance that the mechanical response of masonry arch bridge can be analysed by correction finite element model established with the proposed methods.The method can provide reliable basis for bearing capacity evaluation and reinforcement of bridges with the same kind of structure.