Journal of JSCE, Vol. 2, 54-61, 2014 (Invited Paper) THE ORIGIN OF TIMBER ARCH BRIDGES IN CHINA Yan YANG1, Shozo NAKAMURA2, Baochun CHEN3 and Takafumi NISHIKAWA4 1Assistant researcher, College of Civil Eng., University of Fuzhou (2, Xueyuan Road, Minhou, Fuzhou 350108. China) E-mail:
[email protected] 2Member of JSCE, Professor, Dept. of Civil and Environmental Eng., Nagasaki University (1-14, Bukyo-machi, Nagasaki 852-8521, Japan) E-mail:
[email protected] 3Professor, College of Civil Eng., University of Fuzhou (2, Xueyuan Road, Minhou, Fuzhou 350108. China) E-mail:
[email protected] 4Member of JSCE, Assistant Professor, Dept. of Civil and Environmental Eng., Nagasaki University (1-14, Bukyo-machi, Nagasaki 852-8521, Japan) E-mail:
[email protected] The main structure of timber arch bridges in China consists of two longitudinal polygonal arch systems made of straight logs. According to their present situation, location, and structural details, these timber arch bridges can be further divided into two types: one is exemplified by the non-extant ancient Bianhe rainbow bridge, and the other by the extant Min-zhe timber arch bridge. However, the historical origin of these two bridges is not clear and is still being argued. In this paper, the two types of timber arch bridges are struc- turally and historically analyzed and compared to determine which one is the pioneer from the techno- logical development viewpoint. Results of our research indicate that, compared with the Bianhe rainbow bridge, the Min-zhe timber arch bridge has better traffic performance and can provide additional service performance.