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首页> 外文会议>Transportation Research Circular no.E-C104; TRB(Transportation Research Board) Annual Meeting; 200601; Washington,DC(US) >Condition Assessment of Highway Structures: Past, Present, and Future
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Condition Assessment of Highway Structures: Past, Present, and Future

机译：公路结构状况评估：过去，现在和未来

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The Silver Bridge collapse of 1967 was the impetus behind the creation of the National Bridge Inspection Standards (NBIS), which mandated the periodic inspection of bridges on and off of the National Highway System (NHS). While the inspections associated with mis effort provided useful information about the nation's bridge inventory and their condition, it was insufficient to make reliable programmatic decisions in the face of dwindling funding dollars. Subsequent revisions to federal bridge legislation created funding for bridge management systems (BMS), which advanced the NBIS information to the state where better decisions were possible. Despite the advances in BMS modeling, the condition assessment activities associated with NBIS and BMS still rely heavily on visual inspection, which inherently produces widely variable results. This paper presents a historic perspective of the condition assessment process for our nation's bridges, highlighting significant developments and shortcomings. The bridge owners of today are faced with the same challenges that faced bridge owners at the inception of the Interstate highway system, that is how to deal with and manage an aging Interstate system, particularly, a system that is today 50-years old with approximately 30% of its bridge inventory rated as structurally deficient or functionally obsolete. The challenge today will be to develop better assessment methodologies that will generate better prediction models so owners can maintain and preserve their bridge inventories, under increased funding restraints. The paper presents highlights of a new initiative, the Long-Term Bridge Performance Program (LTBPP), which was included in the latest highway legislation. This program will provide quantitative data for network and bridge level management; ultimately serving to improve the safety assessment of our nation's bridges.
机译：1967年的银桥倒塌是制定国家桥梁检查标准（NBIS）的推动力，该标准要求对国家公路系统（NHS）上下的桥梁进行定期检查。尽管与不当努力相关的检查提供了有关该国桥梁库存及其状况的有用信息，但面对资金的减少，不足以做出可靠的方案决策。随后对联邦桥梁法规的修订为桥梁管理系统（BMS）筹集了资金，该系统将NBIS信息提供给可能做出更好决策的州。尽管BMS建模取得了进步，但是与NBIS和BMS相关的状态评估活动仍然严重依赖视觉检查，这必然会产生广泛的结果。本文介绍了我国桥梁状况评估过程的历史性观点，突出了重大发展和不足。如今的桥梁所有者面临与州际公路系统启动时桥梁所有者所面临的相同挑战，即如何处理和管理老化的州际公路系统，特别是如今已有50年历史，大约有50年历史的系统其桥梁库存的30％被评定为结构缺陷或功能已过时。今天的挑战将是开发更好的评估方法，以生成更好的预测模型，以便业主在不断增加的资金限制下可以维护和保存其过桥库存。本文介绍了一项新计划的重点，即长期桥梁性能计划（LTBPP），该计划已包含在最新的高速公路法规中。该程序将为网络和网桥级管理提供定量数据；最终有助于改善我们国家桥梁的安全评估。

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