HCC-B剪力连接件在新旧混凝土连接中的性能研究

Mending and Strengthening of Concrete Bridge

为了确保构件整体受力,剪力连接件必须确保新旧混凝土层之间荷载的可靠传递。依据界面承载力的分析,优化了连接件的静态设计方法。通过建立有限元模型对劈裂和剪力测试的结果进行比较,分析不同连接件尺寸下的劈裂测试结果,得出最佳优化的连接件形状。通过模拟测试,证明了新型剪力连接件的性能远比传统的好,且其系统的建立和安装都利于施工,节省时间。

In order to obtain monolithic structures,the shear transfer between the concrete layers must be guaranteed. Based on analysis of the load-bearing behavior of the interface,optimization criteria concerning the static behavior of connector are derived.Numerical models which allow simulating a splitting test and a shearing test have been set up calibrated.By simulating various connector geometries in the splitting test,an optimized shape could be defined the improved behavior of the new shape compared to traditional connectors.Analysis of the placing procedures has shown that the new shape shear connectors offers a clear advantage in terms of time required for setting the elements.