Abstract: By bonding GFRP in different locations of concrete arch，6 GFRP-concrete composite arches were gained． Through destructive test of the arches，the failure modes，load-deflection curves，structural stiffness and bearing capacities of GFRP-concrete composite arches were studied.The experiments showed that GFRP-concrete composite arch has a higher cracking load.Before cracking the stiffness of GFRP-concrete composite arch is higher than ordinary concrete arch.After cracking，the stiffness and crack resistance of GFRP-concrete composite arch are significantly higher than ordinary concrete arch.Also the bearing capacities and ultimate deformation of GFRP-concrete composite arch are higher.The composite arch boned with circular and U-shaped GFRP has superior mechanical performance to those which with single-side shaped GFRP． However，the performance of composite arch with total arch-shaped GFRP is not optimal．

Key words: GFRP-concrete composite arch, failure mode, deflection, cracking load, ultimate load

摘要： 在混凝土拱的不同位置、采用不同黏贴形式黏贴玻璃钢( GFRP) 得到了6 个GFRP-混凝土复合拱。对GFRP- 混凝土复合拱进行了加载破坏试验，并对其破坏形式、荷载挠度曲线规律、刚度规律和承载力等结构性能进行了研 究。试验表明:GFRP-混凝土复合拱开裂荷载更高，开裂前的刚度明显高于普通混凝土拱，开裂后其刚度及抗裂性 能也明显优于普通混凝土拱; GFRP-混凝土复合拱具有更高的极限承载力和极限变形。GFRP-混凝土复合拱中，黏 贴GFRP 的范围较大时，GFRP-混凝土复合拱的力学性能更优; 采用环形及U 形黏贴GFRP 的复合拱力学性能明显 优于采用单面黏贴GFRP 的复合拱，但全拱环形黏贴GFRP 的复合拱性能并非最优。

关键词: GFRP-混凝土复合拱, 破坏形式, 挠度, 开裂荷载, 极限荷载