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枝城公铁两用大桥公路桥混凝土桥面板破损严重,亟需维修加固。该文在病害成因分析的基础上,提出更换正交异性钢板、铺设剪力钉+钢纤维混凝土+防水联结应力吸收层+SMA的桥面系维修加固方案。通过建立枝城大桥的Midas有限元模型,进行全桥静、动力结构分析,结果表明:该维修加固方案能满足铁路中-活载与公路-Ⅱ级荷载要求,维修加固桥面板可优化为每节段32m。
Zhicheng highway bridge concrete bridge deck damaged, serious repair and reinforcement. Based on the analysis of the cause of the disease, this paper proposes a plan of repairing and strengthening the bridge deck system of replacing the orthotropic steel plate, laying shear nail + steel fiber reinforced concrete + water-proof coupling stress absorption layer + SMA. Through the establishment of Midas finite element model of Zhicheng Bridge, the static and dynamic analysis of full bridge is carried out. The results show that this repair and reinforcement scheme can meet the requirements of mid-live load and highway-Ⅱ load, Section 32m.