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Laboratory Performance of Highway Bridge Girder Anchorages Under Simulated Hurricane-Induced Wave Loading

机译:模拟飓风波浪载荷下公路桥梁锚固的试验研究

摘要

Many bridges along the Gulf Coast of the United States were damaged by recent hurricanes, and many more are susceptible to similar damage. This research examines the structural performance of common connection details used to anchor prestressed concrete girders to the substructure. Full-scale specimens were fabricated and tested under static and dynamic cyclic load histories. Dynamic load histories were developed from previously conducted hydraulic tests of a 1/5 scale model of a highway bridge under hurricane wave loads. The load effects considered included the pseudo-statically applied vertical uplift force, horizontal force, combined horizontal and vertical forces, and dynamically applied combined horizontal and vertical forces. This research describes the structural performance of the details under these loading conditions, provides improved understanding of connection performance, and enables better design details for new bridge construction and for rehabilitation of existing bridges to resist hurricane loads to produce surface transportation infrastructure that is more resilient to natural hazards.
机译:美国墨西哥湾沿岸的许多桥梁都受到近期飓风的破坏,还有更多的桥梁也遭受类似的破坏。这项研究研究了用于将预应力混凝土梁锚固到下部结构的常见连接细节的结构性能。在静态和动态循环载荷历史下制造并测试了全尺寸试样。动态载荷历史是根据先前在飓风波载荷下对公路桥梁的1/5比例模型进行的水压试验得出的。考虑的载荷效应包括拟静态施加的垂直向上力,水平力,水平和垂直组合力以及动态施加的水平和垂直组合力。这项研究描述了在这些载荷条件下细节的结构性能,提供了对连接性能的更好理解,并为新桥梁的建造和现有桥梁的修复提供了更好的设计细节,以抵抗飓风荷载,从而产生对地面运输基础设施更具弹性的结构。自然危害。

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