Brief description of large-span cable-stayed bridge
1.1 definition of
Is really a cable-stayed bridge deck method below stress and pull the help method of bridge deck technique constituted by stiffening its assistance technique produced up of cable. Considering that 1956, Sweden started the contemporary cable-stayed bridge Stromsun bridge immediately after the apex, with all the improvement of material science and computer system science, and constructed a sizable number of domestic and foreign cable-stayed bridge with its span can also be progressively rising. Cable-stayed bridge with spanning capacity and much better structure efficiency and basic construction, easy upkeep, low cost and lightweight aesthetic appearance and other traits, its fast development.
1.two the structural traits of cable-stayed bridge
Large span cable tray
Primary characteristic would be the use with the cable-stayed bridge pylon leads elastic intermediate help of inclined cable as beams collapsed, as a way to minimize bending moment of beam down, lessen the beam weight and enhance beam span. Certainly, this flexibility of inclined cable-beam help, only inside the slanting cable is normally in tension may be brought into full play. So you need to load prior to the pre-stretching the cable. Such pretension can also reduce the pressure amplitude of inclined cable, cable for improved rigidity, hence enhancing the structure from the force, as well as the horizontal force on the inclined cable axial stress towards the principal beam major beam's anti-cracking performance may be enhanced, save content of high strength steel. Death knell, Tower and beam cable-stayed bridge is usually a cable infrastructure consisting of composite structures. Cable-stayed bridge. Beams and the tower would be the key load-bearing elements, take Grand have combined into an all round structure. Based on beam of support way, which including beam and Tower or DUN of coupling way, composition unique form of maternal structure, but are is borrowed oblique cable will beam to elastic assistance of type hanging in Tower Shang, this middle elastic support (oblique cable) enhanced has beam of stiffness, formed has more points elastic help of variable section continuous beam, and single hanging arm beam, and t variety just frame plus the continuous just frame.
1.3 construction of cable-stayed bridge in China
Reverse steel cable ladder
In 1975, the initial cable-stayed bridge in China-Sichuan Yun Yang bridge constructed so far, bridge workers inside the absorption of foreign advanced technology
And around the basis of expertise, continuous development and innovation, from the 90 's of the last century towards the present, especially in building of large-span cable-stayed bridge cable-stayed bridges by leaps and bounds, a symbol of Shanghai Yangpu bridge, the main cable-stayed bridge across the 600m: major 605m
, Laminated beams-diamond-shaped towers of the Qingzhou minjiang bridge; 618m, hybrid girder main span-diamond-shaped major tower of Wuhan Yangtze River Bridge in 628m, rigid box girder key span-diamond-shaped principal tower of Nanjing Yangtze River, as well because the construction from the third Nanjing Yangtze River Bridge. These bridges and continuously adopting new technologies, explore new strategies, enabling the improvement of significant cable-stayed bridge and construction in to the sophisticated ranks in the world.
