In this research, the rapid bridge splicing technology was studied for the Shanghai Jiyang Road viaduct bridge splicing project. In the experimental study, the form of stitching joint was designed to best suit the existing bridge, and three types of ultra-high performance concrete materials (high strain-hardening I type, high strain-hardening II type and strain softening type) were adopted. In the experiment, asymmetrical loading was used to simulate the uneven settlement between the new and the existing bridge. The failure mode and structural performance of the joint under the uneven settlement was studied. The structural performance, bearing capacity and crack control ability were compared among different test models regarding the joint types and the joint materials. Secondly, the test results were verified with the finite element analysis results. Parametric analysis is then carried out using the finite element model. The investigated factors include the constitutive models of the joint material, the free length and the joint thickness. The results showed that the finite element results were in good agreement with the test results. The study in this paper has successfully guided the actual engineering construction and achieved good results, which can be used for reference for similar projects in the future.

本研究以上海济阳路高架桥拼接工程为研究对象，对桥梁快速拼接技术进行了研究。试验研究中，根据现有桥梁设计拼接缝形式，采用三种超高性能混凝土材料（高应变硬化Ⅰ型、高应变硬化Ⅱ型和应变软化型） . 在实验中，采用非对称荷载模拟新旧桥梁之间的不均匀沉降。研究了不均匀沉降下节点的破坏模式和结构性能。从接头类型和接头材料方面，比较了不同试验模型的结构性能、承载力和裂缝控制能力。其次，试验结果与有限元分析结果相验证。然后使用有限元模型进行参数分析。研究的因素包括接头材料的本构模型、自由长度和接头厚度。结果表明，有限元结果与试验结果吻合较好。本文的研究成功地指导了实际工程建设，取得了良好的效果，可供今后类似工程借鉴。