ABSTRACT
ABSTRACT: In recent years, many multi-span cable supported bridges have been designed and built in China. Among them, there areTaizhou Bridge, the largest multi-span suspension bridge, and Jiashao Bridge, the largest multi-span cable-stayed bridge. Taizhou Bridge, spanning over Yangtze River in Jiangsu Province, is a three-pylon two-span suspension bridge with a span arrangement of 390 + 1080 + 1080 + 390 m. It has a steel middle pylon and two concrete side pylons and steel bridge decks. Jiashao Bridge, spanning over Hangzhou Bay in Zhejiang Province, is a six-pylon cable-stayed bridge with a span arrangement of 70 + 200 + 5 × 428 + 200 + 70 m. It is the largest multi-span cable-stayed bridge in the world with the widest bridge deck of 55.6 m. In this paper, some key design and construction technologies of the two bridges are presented. The following topics regarding the design and construction of multi-span cable supported bridge are discussed: for Taizhou Bridge, (1) vehicle load of multi-span suspension bridges, (2) the anti-slide problem between the main cable and the saddle on the top of the middle pylon, (3) the construction of the longest main cable; for Jiashao Bridge, (4) the structural system of the six-pylon cable-stayed bridge, (5) the solution to release temperature stress for long bridge deck, (6) the maintenance equipment for multi-span twin-deck steel girder, and (7) the construction of bridge deck. These studies offer significant advances in understanding and predicting the behavior and the construction of those cable supported bridges with multiple spans.
