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首页> 外文会议>Engineers Society of Western Pennsylvania Annual International Bridge Conference; 20070604-06; Pittsburgh,PA(US) >New Stainless Steels for Bridge Applications
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New Stainless Steels for Bridge Applications

机译：桥梁应用的新型不锈钢

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摘要

Innovative bridge designers and engineers who are open to new materials can provide owners significant life cycle cost savings. Selecting the right bridge steel for special localized environmental conditions involves knowing and understanding the design strength and corrosion properties of candidate steels. New stainless steels have been developed to meet a variety of such conditions. Conventional Type 304 stainless steel with its low yield strength and susceptibility to chloride stress cracking is not usually a candidate for bridge applications. However there are several modern economical stainless steels that combine high strength and excellent corrosion behavior that are finding applications in bridge structures. These steels are classified as weldable ferritic stainlesses such as ASTM A1010 and low nickel duplex steels such as 2304 or 2205. The current paper describes recent examples of stainless steel bridges, as well as the results of research and development programs launched to evaluate the corrosion resistance and design properties (fatigue, buckling) of some of these new materials to allow bridge designers to take full advantage of their properties. Some economical implications of these attractive material choices are also discussed.
机译：乐于接受新材料的创新桥梁设计师和工程师可以为业主节省大量生命周期成本。在特殊的局部环境条件下选择合适的桥梁钢需要了解和理解候选钢的设计强度和腐蚀性能。已经开发出满足各种这种条件的新型不锈钢。具有低屈服强度和易受氯化物应力开裂影响的常规304型不锈钢通常不适合桥梁应用。但是，有几种现代经济型不锈钢结合了高强度和出色的腐蚀性能，正在桥梁结构中得到应用。这些钢被分类为可焊接铁素体不锈钢（例如ASTM A1010）和低镍双相钢（例如2304或2205）。本文描述了不锈钢桥的最新示例，以及为评估耐腐蚀性而开展的研究和开发计划的结果以及其中一些新材料的设计特性（疲劳，屈曲），以使桥梁设计师能够充分利用其特性。还讨论了这些有吸引力的材料选择的经济意义。

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