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交通荷载对钢桥面铺装的使用寿命有很大影响,为设计出满足超重行车荷载使用要求的钢箱梁桥面铺装,运用有限元方法分析了3种备选铺装结构在超重荷载作用下的力学性能,并进一步研究为改善铺装受力状况而采取的桥梁加固措施,为桥梁结构与桥面铺装一体化设计做出了有益的尝试。根据研究结果,推荐钢桥面采用“7.5 cm三层环氧沥青混凝土”铺装结构,并对桥梁结构采用在腹板附近加焊纵向加劲肋的方式进行加固。研究表明,增加铺装厚度以及钢桥面板局部结构的优化,可以较为明显地改善铺装的受力状况,建议钢桥结构设计与桥面铺装设计应同步、协调进行。
Traffic load has a great influence on the service life of steel bridge deck pavement. In order to design the steel box girder deck pavement that meets the requirements of overweight driving load, the paper analyzes the effect of three kinds of alternative pavement structure on overloaded load Mechanical properties under the action of the bridge, and to further study the bridge reinforcement measures to improve the stress conditions of the pavement, and make a beneficial attempt for the bridge structure and the integrated design of the bridge deck pavement. According to the research results, it is recommended to use “7.5 cm three-layer epoxy asphalt concrete” pavement structure for steel bridge deck, and to reinforce the bridge structure by applying longitudinal stiffener near the web. The research shows that increasing the thickness of the pavement and the optimization of the local structure of the steel bridge deck can obviously improve the stress conditions of the pavement. It is suggested that the design of the steel bridge and the deck pavement design should be synchronized and coordinate.