中文摘要：

FRP管轻质高强、耐久性好、易于维护,为了解FRP管应用于悬带拱桥体系时,桥梁的力学性能,以某大学中轴线景观人行桥——钢管混凝土悬带拱桥为背景,进行FRP管和混凝土的组合结构替代钢管混凝土结构的试设计研究。FRP种类较多,试设计时将拱肋调整为GFRP圆管混凝土,吊杆更换为GFRP变截面矩形方管,横梁更换为GFRP圆管混凝土,2条悬带增加为3条,悬带更换为可更换式的CFRP索。采用有限元软件建立试设计桥有限元模型,对试设计桥静力性能、弹性稳定性及自振频率进行验算,并比较不同阶段下FRP管混凝土悬带拱桥与钢管混凝土悬带拱桥静力性能。研究结果表明：FRP管混凝土悬带拱桥的静力性能和动力性能均可满足国内外现行的规范要求,FRP管混凝土悬带拱桥在施工阶段和正常使用阶段的内力均小于钢管混凝土悬带拱桥的内力。

英文摘要：

FRP tubes are light, have high strength and good durability, and are easy to maintain.To examine the load bearing capacity of the stress-ribbon arch bridge system when the FRP tubes are used, a landscape pedestrian bridge on the central axial line of a university, a stress-ribbon bridge stiffened by concrete-filled steel tubular arch was taken as the study background, to carry out the trail design study of using the FRP tubes-concrete composite structure to replace the concrete-filled steel tubular structure.FRP is of a variety of types.During the trial design, the arch ribs were adjusted to concrete-filled GFRP round tubes, the hangers the GFRP rectangular tubes with variable cross section, and the cross beams the concrete-filled GFRP round tubes.The stress ribbons were added from two to three, replaced by the changeable CFRP cables.The finite element model of the bridge of such type was established, to verify the static performance, elastic stability and natural vibration frequency of the bridge.The static performances of the stress-ribbon bridges stiffened respectively by the concrete-filled FRP tubular arch and the concrete-filled steel tubular arch were compared.The results of the study show that the static and dynamic performance of the stress-ribbon bridge stiffened by concrete-filled FRP tubular arch can meet the requirements of the current Chinese codes.The internal forces of the stress-ribbon bridge stiffened by concrete-filled FRP tubular arch in the construction and operation stages are much smaller than those in the stress-ribbon bridge stiffened by concrete-filled steel tubular arch.