钢桥面铺装层组合结构性能研究

Research on Composite Structure Performance of Steel Bridge Deck Pavement

针对钢桥面铺装层普遍存在的推移、拥包、车辙、开裂等耐久性问题,提出"剪力钉+钢筋网+高韧性轻质混凝土下层+高粘高弹防水粘结应力吸收层+高粘高弹SMA磨耗层"的高耐久铺装层组合结构,对小比例尺铺装组合结构模型的高温稳定性能、层间粘结性能和疲劳性能进行了研究,成功应用于枝城长江大桥维修加固工程,研究结果表明,高耐久铺装层组合结构具有优异的粘结抗剪性能、高温稳定性能与抗弯拉疲劳性能,研究成果可为我国钢桥面铺装领域提供技术支撑。

For the ubiquitous problem of steel deck pavement durability, like transposition, upheaval,rutting, cracking, It is put forward that ＂shear studs ＋ steel mesh ＋ high toughness lightweight concrete underlayer ＋ high viscosity high elastic waterproof bonding stress absorb layer ＋ SMA high viscosity high elastic wear layer＂, which is a highly durability pavement composite structure. High temperature stability, the interlayer adhesion and fatigue properties of the small-scale pavement composite structure model are investigated and successfully applied in ZhiCheng Yangtze river bridge reinforcement maintenance engineering. The results show that composite structure of high durability pavement has excellent shear adhesion properties, high temperature stability and flexural fatigue properties. The research results provide technical support for the field of steel bridge deck.