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公路桥梁的伸缩缝是当今桥梁设计、施工和维护中的难题之一。桥梁的伸缩缝直接承受车轮荷载的反复冲击作用,并且一直暴露在空气中使用环境相对恶劣,是桥梁附属结构中容易遭到损坏且又较难以修复的部位[1]。桥梁伸缩缝在设计、施工上有一点不足或缺陷,就会引起其早期损坏;而桥梁伸缩缝的损坏,会引起较大的车辆冲击荷载,使行车状况恶化,使桥梁使用寿命急剧降低。无伸缩缝桥梁是桥梁设计理念的一种创新,符合全寿命周期内对桥梁耐久性和持续性的要求,其优越的使用性能和零维护的设计目标使其在很多国家得到广泛的应用和推广。为此,本文对无伸缩缝桥梁进行初步的研究探讨。
The expansion joints of highway bridges are one of the problems in bridge design, construction and maintenance. The expansion joint of the bridge is directly subjected to the repeated impact of the wheel load and has been exposed to the harsh environment in the air for a long time. It is a part of the bridge ancillary structure which is easily damaged and difficult to be repaired [1]. Bridge expansion joints in the design, construction a little inadequate or defective, it will cause its early damage; and bridge expansion joint damage, will cause greater vehicle impact load, the traffic conditions deteriorated, the bridge service life dramatically reduced. Bridge without expansion joints is an innovation of bridge design concept that meets the durability and continuity requirements of the bridge over the entire life cycle. Its superior serviceability and zero-maintenance design goals make it widely used and promoted in many countries . For this reason, this paper does a preliminary research on the bridge without expansion joint.