Comparison Between Steel Arch Bridges in China and Japan
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Journal of JSCE, Vol. 1, 214-227, 2013 COMPARISON BETWEEN STEEL ARCH BRIDGES IN CHINA AND JAPAN Kangming CHEN1, Shozo NAKAMURA2, Baochun CHEN3, Qingxiong WU3 and Takafumi NISHIKAWA4 1Student Member of JSCE, PhD Candidate, Dept. of Civil and Environmental Eng., Nagasaki University (1-14, Bukyo-machi, Nagasaki 852-8521, Japan) 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) 4Member of JSCE, Assistant Professor, Dept. of Civil and Environmental Eng., Nagasaki University (1-14, Bukyo-machi, Nagasaki 852-8521, Japan) A review of the current status and progress of steel arch bridges in China and Japan, as well as an outline of the design vehicle load and design method against global buckling for such bridges, is presented in this paper. The existing steel arch bridges in China and Japan were analyzed in terms of year of completion, main span length, structure type, main arch rib form and construction method. It is shown that the steel arch bridge in China has developed rapidly since 2000, characterized by a long main span, while in Japan it has stepped into a fast-growing period since 1955, with medium and small bridges holding a great majority. As for the main span length, most of the bridges have a span from 100m to 250m in China, while majority of bridges are shorter than 150m in Japan. Over 80% of the bridges in China are through and half-through bridge types, and the arch ribs are hingeless structures. However, over 88% of bridges in Japan are deck and through bridge types, and a two-hinged structure was mostly adopted in through and half-through bridges. Sin- gle-hinged and three-hinged arches were seldom adopted in the two countries. The rise-to-span ratios of the arches in China and Japan are mainly in the range of 1:6-1:4 and 1:7-1:5, respectively. Most of the arches both in China and Japan use solid box ribs, and only a small fraction uses truss ribs, in which box sections are mostly adopted for the truss members. The cantilever method and scaffolding method are the two main construction methods used in China and Japan, although some other construction methods have also been developed. Key Words : steel arch bridge, comparison, design vehicle load, design method, main span, structural type, arch rib, construction method 1. INTRODUCTION and design capabilities contribute to make the steel arch bridge one of the main bridge types in the world, By the material used for the main arch, an arch even though many bridge types have become avail- bridge can be classified into five categories, i.e., able in recent years. Lots of world-class achieve- stone, concrete, reinforced concrete (RC), concrete ments have been witnessed in the field of steel arch filled steel tube (CFST) and steel arch bridges. Steel bridge design and construction. arch bridges have been constructed only since the Steel arch bridges have been designed and con- late 1800s. Their use began to spread before World structed for about 140 years in Japan since the first War II and significantly expanded after the war, cast iron bridge, Shinmachi Bridge, was completed when steel became more available. The steel arch is in 1872. Many steel arch bridges have been con- aesthetically beautiful, highly stiff, efficient in cost, structed with various structure types by employing a and can be in multiple structural forms, hence it has variety of construction methods1), 2). A wealth of been widely accepted. Improved materials, products experience has been accumulated. 214 Very few steel arch bridges had been built before pletion years of 68 bridges are known. They are 2000 in China, but more and more steel arch bridges shown in Fig. 1 by markers with some representative were built later on. Some of them have very long bridges labelled. The red broken line and blue solid spans. The present span record of the steel arch line show the development of the main span and the bridge is held in China3), 4), and some new construc- number of bridges, respectively. Twenty bridges tion methods have been employed, such as the swing with main spans of more than 200m are listed in method. Table 1. From a brief review of the history of the steel arch It can be seen from Fig. 1 that the development of bridge in China and Japan, it can be seen that it is steel arch bridges in China can be partitioned roughly beneficial for engineers to learn from the rich ex- into two stages using the year 2000. Before 2000, periences of Japan and their techniques for design only 10 bridges (13.2%) were built. Compared with and construction. The quick evolution of steel arch steel arch bridges in other countries and RC and bridges in China is also worth knowing for engineers. CFST arch bridges in China8), 9), the construction of In this context, a large amount of data and litera- steel arch bridges has obviously lagged behind. ture about steel arch bridges in China and Japan The Dahong Bridge in Tianjin may have been the constructed before December of 2011 and 2008, first steel arch bridge in China. It was first a wooden respectively, have been collected, and are analyzed bridge and was reconstructed into a steel arch bridge in terms of their history, main span length, structural in 1887, but was swept away by flood in 1924. Re- form, construction method and aesthetics. In addition, construction of the New Dahong Bridge was planed a design vehicle load and design method against again in 1933, and completed in 1937. It is a global buckling for steel arch bridges are outlined. through-type steel arch bridge with three spans; the main span is 57.37m10). For a long time in China, scarcity of material and 2. EVOLUTION OF STEEL ARCH the backwardness of industrialization prevented a BRIDGES large number of steel bridges from being built. Steel was only used in key bridges crossing major rivers. The evolution of arch bridges is closely related to When the Wuhan Yangtze River Bridge was built in that of construction materials. Such evolution due to the 1950s, the steel for its construction was imported improvement in the technique of steel production is a from the former Soviet Union. Afterwards, it became common matter all over the industrial field. The possible to produce the type 16Mn steel (yield stress: industrialization of iron and steel enabled their initial use in arch bridges, which was the main long-span 600 Chaotianmen Bridge 70 bridge type at that time. The world’s first cast iron 550 Lupu Bridge 500 60 bridge was constructed in the UK (completed in 450 Xinguang Bridge 50 1779). Some wrought iron bridges were also built 400 Caiyuanba Bridge during this period, such as the well-known Garabit 350 40 Bridge in Massif, France, with a main span of 165m 300 Jiujiang Yangtze 250 River Bridge 30 (completed in 1884), and the Maria Pia Bridge in 200 Dukou Bridge Main span,Main m Guandu Bridge 20 150 Midi Bridge of bridgesNumber Porto, Portugal, with a main span of 160m (com- Construction 3) 100 pleted in 1877) . Yingsuihe Bridge 10 50 Under The steel arch bridge was first established in the 0 New Dahong Bridge 0 USA (Eads Bridge, completed in 1874). Its success promoted the booming development of steel arch 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 Completion year bridges worldwide. A number of steel arch bridges, Fig. 1 Main spans and completion year of steel arch such as the Hell Gate Bridge built in the USA in 1916 bridges in China. (main span: 298m), the Sydney Harbor Bridge con- structed in Australia in 1932 (main span: 503m), the Bayonne Bridge and the New River Gorge Bridge, with main spans of 504m and 518.3m, respectively, in the USA5), were built successively. (1) Evolution in China Information on 82 steel arch bridges in China has been obtained from a website survey and a literature review6), 7). Among them, the main spans and com- Fig. 2 No. 2 Panzhihua Bridge. 215 343MPa, carbon content: 0.16%, low alloy) to build steel type for bridge) and the Q370q types, and more the Nanjing Yangtze River Bridge in the 1970s. and more bridges use the Q420q steel. There is a However, this kind of steel showed quick degrada- tendency to use high-performance steel. Therefore, tion in strength and ductility with an increase in more and more steel bridges have been constructed thickness. A new type of steel, 15MnVNi (yield in the last three decades of large-scale infrastructure stress: 420MPa, carbon content: 0.15%, main alloy: construction. Steel arch bridges are becoming more manganese, vanadium and nickel) was developed popular even after many long-span steel cable-stayed and used in the Baihe Bridge in 1976. But poor bridges and steel suspension bridges have been built. weldability prevented it from further use except in In the decade after 2000, 66 bridges were built, the Jiujiang Bridge in 1992. It was really embar- which accounted for 86.8% of the total. Most rassing that no steel other than the 16Mn could be long-span bridges were built in this period, 60 used in bridge engineering at that time11). bridges with main spans of 100m or longer, the av- Very few steel highway bridges had been built erage main span being 216m.