Experimental and Parametric Studies of Seismic Actions in Superstructures of Box Girder Bridges

全国各地的公路桥都是按照公路的路线建造的；因此，一些桥梁的建造具有水平曲率。因此，这些桥梁的分析和设计是桥梁工程师的一项新的设计活动，此外，关于这些桥梁在地震期间的动力响应，几乎没有实验数据来证实设计。这项研究工作将与目前的一个项目一起进行，该项目正在获取新西兰一座曲线箱桥的动力响应的现场数据。研究人员将调查和获得桥梁的变形和翘曲模态特性的实际数据，并将补充为土-结构相互作用和上部结构弯扭动力特性的耦合所获得的数据。所获得的数据将在分析方法和计算机程序的开发中非常有用，也将作为公路桥梁设计规定的基础。

Highway bridges throughout the country are constructed to follow the alignment of the highway roadway; consequently, some bridges are built with a horizontal curvature. The analysis and design of these bridges is, therefore, a new design activity for bridge engineers and, in addition, very little experimental data are available to substantiate the design with respect to the dynamic response of these bridges during an earthquake. The research effort will be performed in conjunction with a current project which is obtaining field data on the dynamic response of a curved box bridge in New Zealand. Researchers will investigate and obtain actual data on the distortional and warping modal properties of the bridge and will supplement the data obtained for the soil-structure interaction and the coupling of the flexural and torsional dynamic properties of the superstructure. The data to be obtained will be very useful in the development of analysis methods and computer programs, and will also serve as a basis for design provisions for highway bridges.