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首页> 外文期刊>Journal of bridge engineering >Evaluation, Rehabilitation Planning, and Stay-Cable Replacement Design for the Hale Boggs Bridge in Luling, Louisiana
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Evaluation, Rehabilitation Planning, and Stay-Cable Replacement Design for the Hale Boggs Bridge in Luling, Louisiana

机译：路易斯安那州Luling的Hale Boggs桥的评估，修复计划和斜拉索更换设计

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The Hale Boggs Bridge opened to traffic on October 5, 1983. At the time, it was the first U.S. cable-stayed crossing over the Mississippi River. The PE (polyethylene) protective sheathing was damaged in many of the cables before and during installation, and after the opening of the bridge to traffic. Repairs were attempted to correct the defects in cable sheathing. Many of the repairs performed poorly and failed to protect the main tension element. The condition of 39 out of 72 cables indicated a critical need for repair and timely action was recommended. To address these damages, and to assure the structural integrity of the bridge structure, several strategies involving a range of repair and replacement options were evaluated using life cycle cost analysis. It was concluded that the strategy to replace all cables presents the best value among evaluated alternatives. The design of the complete 72 cable array replacement is the first occasion on which this process is attempted in North America. The final design of the replacement cables is heavily influenced by the geometric restrictions of the existing anchorage locations. The replacement cables are being designed for a 75-year design life and incorporated with the latest advancements in corrosion protection and vibration control. Maintenance of traffic design is an essential part of the project. The bridge is a critical regional link and constitutes a hurricane evacuation route. Traffic maintenance during cable replacement was designed to be as unobtrusive to the public and commerce as practical. This paper describes efforts associated with cable condition assessment, rehabilitation strategy, and design considerations and concepts, undertaken by the writers since 2002 to improve the condition of this major river crossing.
机译：海尔·博格斯桥（Hale Boggs Bridge）于1983年10月5日通车。当时，这是美国第一条跨过密西西比河的斜拉桥。在安装之前和期间以及通车的桥梁开放后，许多电缆中的PE（聚乙烯）保护套都损坏了。试图进行修理以纠正电缆护套中的缺陷。许多维修工作不力，未能保护主张力元件。 72根电缆中有39根的状况表明非常需要维修，建议及时采取措施。为了解决这些损坏并确保桥梁结构的结构完整性，使用生命周期成本分析对涉及多种维修和更换选项的几种策略进行了评估。结论是，在评估的替代方案中，更换所有电缆的策略具有最佳价值。北美地区首次尝试进行完整的72电缆阵列更换设计。替换电缆的最终设计在很大程度上受到现有锚固位置的几何限制的影响。替代电缆的设计使用寿命为75年，并结合了腐蚀防护和振动控制方面的最新进展。维护交通设计是该项目的重要组成部分。这座桥梁是至关重要的区域联系，并构成了飓风疏散路线。电缆更换过程中的流量维护在设计上对公众和商业均不造成干扰。本文介绍了自2002年以来作者为改善这一主要河流过境条件而进行的电缆状况评估，修复策略以及设计注意事项和概念方面的工作。

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