Cable Stayed Bridge Construction Materials

The construction time is longer for suspension bridges. The advantage of cable-stayed bridges lies in the fact that it can be built with any number of towers but for suspension bridges it is normally limited to two towers.

Structure Magazine Cable Stayed Bridges

Early Chinese people used the cable-stayed system to construct suspension bridges out of hemp rope and iron chains 6.

Cable stayed bridge construction materials

. Cable-stayed bridges are usually compared with suspension bridges over which they have several distinct advantages. This construction method was used in the construction of three major composite cable-stayed bridges built in Shanghai over the past few years namely the Nanpu Yangpu and Xupu bridges with 423 m 602 m and 590 m long main spans and completed respectively in 1991 1993 and 1997 Xiang 1999. Reinforced or prestressed concrete composite concrete-steel or orthotropic steel decks.

Here concrete provides self-load to the structure and hence the cables came into Tension and the Deck came in Compression - which resulted into stable Cable Stayed Bridge. Stay cable anchorages on a concrete deck For concrete cable stayed bridges free cantilever construction is considered economical. These bridges can have any number of towers while suspension bridges which require land anchorage are usually limited to two.

The system was used by Egyptians for their sailing ships. There are many other examples of ancient cable-stayed bridge systems found around the world. With span length less than 1000m suspension bridges require more cables than cable-stayed bridges.

The primary construction materials used in cable-stayed bridges are. Following a brief history of cable stayed bridges this chapter describes the various materials and forms of construction that have been adopted for the major structural components of these bridges focussing in turn on the cable system the pylon and the deck. The Ching Chau Min Jiang and Erqi Yangtze River.

In comparison with the continuous girder bridges the internal forces due to both dead load and live load are much smaller in cable-stayed bridges. Early examples such as the Strömsund Bridge in Sweden 1956 used just two cables fastened at nearly the same point high on the tower and fanning out to support the deck at widely separated points. 1 2 and 8 were recently erected for a freeway in the Czech Republic.

Moreover cable-stayed bridges possess higher stiffness and display smaller deflections when compared with suspension bridges. The difference in the design is that the cables hold the deck by connecting it directly to the support pillars instead of using suspending wires or cables to stabilize the span. One bridge was built across the Elbe River near Podebrady while the other bridge was built over a major railroad junction in Prague-Vrsovice.

The improvement came with the usage of appropriate material for desired object. A cable-stayed bridge is a structure with several points in each span between the towers supported upward in a slanting direction with inclined cables and consists of main towers cable-stays and main girders as shown in Fig. Cable-stayed bridges offer a variety of possibilities to the designer regarding not only the materials for deck and cables but also the geometric arrangement of the cables.

Cable stayed bridges date back many centuries. Cable-stayed bridges can be either concrete or steel though a combination of both materials is often chosen. T wo cable-stayed bridges using precast prestressed concrete segmental construction see Figs.

PDF Construction Stage Analysis of Cable-Stayed Bridges. A cable-stayed bridge offers a design that is similar to a suspended bridge It will have towers that help to support the structure while the deck is held in place by cables. Beams of prestressed concrete or steel box girders of prestressed concrete or steel similar to.

They also require lesser number of cables as compared to the suspension type. Concrete and steel are used either separately or as composites in the construction and it is possible to have multiple cable stayed bridges joined together eg.

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