IMPROVING THE PERFORMANCE OF BRIDGE EXPANSION JOINTS: BRIDGE DECK EXPANSION JOINT WORKING GROUP FINAL REPORT
IMPROVING THE PERFORMANCE OF BRIDGE EXPANSION JOINTS: BRIDGE DECK EXPANSION JOINT WORKING GROUP FINAL REPORT
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提高桥梁伸缩缝的性能：桥面伸缩缝工作组最终报告
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
J. Cuninghame
中科院分区：
文献类型：
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作者：
C. Barnard;J. Cuninghame
县测量师协会 (CSS) 和交通研究实验室 (TRL) 公路研究工作组成立了一个工作组。目的是提出提高膨胀节性能一致性和性价比的方法，减少过早失效和泄漏的发生率。研究了接头选择、性能和维护的各个方面，并进行了全寿命成本研究，以权衡高初始成本/长寿命接头与低购买成本/短寿命选项的好处。本报告附带了一份实用指南。研究发现，大多数接头故障是由交通负载、安装错误、细节不良或运动远小于预期的最大值引起的，很少是由于超过接头的设计运动能力造成的。接头的性能存在很大差异，特别是在耐用性方面。这似乎是选择、购买和安装接头方法的结果。在所有阶段，联合供应商面临的压力是实现最低的供应成本和最短的安装时间。没有足够的动力来生产耐用的接头。人们普遍认为桥梁上的接头数量应保持在最低限度。在必须使用接头的地方，优选地下接头。膨胀节的总成本远远大于供应和安装成本。在繁忙的道路上，交通管理和接头维修或更换的延误成本使得接头的成本几乎无关紧要。为了延长使用寿命而支付额外费用总是值得的。 （一个）
A Working Group was set up by the County Surveyors' Society (CSS) and Transport Research Laboratory (TRL) Working Party on Highway Research. The objective was to propose the means to improve the consistency of performance and value for money of expansion joints, reducing the incidence of premature failure and leakage. Each aspect of joint selection, performance and maintenance was studied and a whole life cost study was carried out to weigh the benefits of high initial cost/long-life joints against low purchase cost/short-life options. A Practical Guide has been produced to accompany this report. It was found that most joint failures are caused by traffic loading, faulty installation, poor detailing, or movements much less than the maximum expected - very few are due to the design movement capacity of the joint being exceeded. There are wide variations in the performance of joints, particularly with regard to durability. This appears to be a consequence of the methods use to select, purchase and install joints. At all stages, the pressure is for the joint Supplier to achieve the lowest supply cost and the shortest installation time. There is insufficient incentive to produce a durable joint. There is general agreement that the number of joints on a bridge should be kept to a minimum. Where joints have to be used, sub-surface joints are preferred. The total cost of an expansion joint is very much greater than the supply and installation cost. On busy roads, traffic management and delay costs for joint repair or replacement are such that the cost of the joint is almost irrelevant. It is always worth paying extra for increased service life. (A)