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Development of cooperative system bridges

Journal of Chongqing University 2008年第3期7卷 198-205页

作者：张哲万其柏 School of Civil and Hydraulic Engineering Dalian University of Technology

Cooperative system bridges comprise several basic structures that act jointly to improve structural characteristics. We delved into the historical development of cooperative system bridges. Cooperative systems are classified as different-load cooperative systems and same-load cooperative systems by distinguishing the modes of load distribution. For different-load cooperation,individual basic structures are at different positions in the direction along bridge axis and carry the loads separately. While for same-load cooperation,all basic structures overlap in geometrical locations and support the entire loads conjointly. The choosing of span ratios between basic structures,the design of connections of different-load cooperative systems were discussed as well as optimizations of relative rigidity for same-load cooperative systems which greatly influence structural characteristics. The general situation and several structural measurements of several cooperative bridges were demonstrated. This information can assist engineers in developing their concepts in cooperative systems and can lead to more efficient and economical cooperative bridges.

关键词： cooperative system different-load cooperation same-load cooperation connection relative rigidity

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