斜拉桥与其他桥型的协作研究

Cooperation of Cable-stayed Bridge with Other Bridges

结合国内外代表性的工程实例,介绍斜拉桥同其他桥型协作的形式、特点和研究情况,包括斜拉桥同连续梁或刚构的协作、斜拉桥同拱桥的协作、斜拉桥同悬索桥的协作、斜拉桥同上承式索桥的协作等;对比不同协作体系的荷载分配方式,并根据各个基本结构体系承受的荷载有无明显几何界限,将桥型间的协作区分为共载协作和分载协作,其中分载协作体系结构长度比例的确定、连接部位的设计以及共载协作体系中刚度比例的优化对结构特性影响较大,是设计的关键.

By gathering typical bridge projects built both in china and abroad, characters and research developments of cooperative systems are interpreted including cooperation of cable-stayed bridge with continuous beam or T frame bridge, with arch bridge, with suspension bridge and also with deck suspen- sion bridge etc. Cooperation is classified as same-load cooperation and different-load cooperation by examining the difference of the load distribution ways, for same-load cooperation, individual part of the system carrying the load together while for different-load cooperation each part supporting the load on it separately. The choosing of span ratios of basic structures and connections design of different-load cooperative systems are of great importance, as well as optimizations of relative rigidity of same-load cooperative systems, which are the most important aspects that greatly influence load distribution and structural characteristics.