关键词: 双曲拱桥, 病害, 分析, 加固

Abstract: A method to strengthen a bi- curved arch bridge is presented according to the damage situation of the bridge. Three measures of enlarging the local sections, strengthning the bracings and changing the form of super-structure are used to avoid the trouble of repairing the whole main-arch. The method has been successfully applied in the rehabilitation of Daning River bridge and presented remarkable social and economic benefits

Key words: bi-curved arch bridges, damage, analysis, strengthening