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首页> 外文期刊>Transportation Research Record >Influence of Wearing Surfacing on Performance of Orthotropic Steel Plate Decks
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Influence of Wearing Surfacing on Performance of Orthotropic Steel Plate Decks

机译：磨损堆焊对正交各向异性钢板甲板性能的影响

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摘要

The AASHTO Bridge Design Specifications first incorporated provisions for the design of orthotropic steel plate deck bridges in 1973. This and subsequent editions as well as the technical literature provided few requirements or guidelines for the design of the wearing surface. Little information is available in the United States today to help bridge designers find suitable materials and design methods for orthotropic deck wearing surfacings. An orthotropic steel deck plate requires a wearing surfacing for skid resistance, for smooth riding, and for corrosion protection. The wearing surfacing is subjected to the heavy impact of loaded truck wheels imposed by the passage of millions of trucks during the several decades of its service life. The performance of the wearing surfacings on orthotropic decks in the United States varies from excellent to poor, depending largely on deck plate flexibility, volume of heavy-truck traffic using the bridge, and, in particular, the type and thickness of the surfacing. Influences of the thickness and modulus of wearing surfacings on the performance of orthotropic steel plate decks are presented. Graphs using AASHTO truck wheel loading are presented; they show the wheel loading demand on the wearing surfacing as a function of thickness and the n value, which is the ratio of the wearing surface modulus to the steel modulus. A successful surfacing material must have properties that meet these demands initially, as well as many millions of wheel load applications during many years of service. Laboratory testing may be required to determine the durability properties of the surfacing.
机译：《 AASHTO桥梁设计规范》于1973年首次纳入了正交异性钢板桥的设计规定。此版本及后续版本以及技术文献对磨损表面的设计提出了很少的要求或指南。今天在美国，几乎没有什么信息可以帮助桥梁设计者找到用于正交各向异性甲板磨损表面的合适材料和设计方法。正交异性钢甲板需要耐磨的表面，以防滑，平稳行驶和防腐。磨损的表面在数十年的使用寿命中受到数百万辆卡车的通行所施加的重载卡车车轮的严重冲击。在美国的正交异性甲板上，耐磨铺面的性能从优到差，主要取决于铺面板的柔韧性，使用桥梁的重型卡车运输量，尤其是铺面的类型和厚度。提出了耐磨堆焊层的厚度和模量对正交各向异性钢板甲板性能的影响。给出了使用AASHTO卡车车轮载荷的图表；它们显示了磨损表面上的车轮载荷需求与厚度和n值的函数关系，n值是磨损表面模量与钢模量之比。成功的表面处理材料必须具有最初能够满足这些要求的性能，以及在多年的服务期间承受数百万轮载荷的应用。可能需要实验室测试以确定表面的耐久性。

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