Civil Engineering Reference
In-Depth Information
Because compression is predominated in the arch, the arch can be built
by stone, concrete, or steel. A composite system of concrete-filled steel tube
has also been widely used since the last two decades. High-strength pre-
stressing tendons are commonly used as the tie in tied-arch bridges. In long-
span arch bridges, the main arch can be made of steel trusses, as the New
River Gorge Bridge shown in Figure 9.3a. More details of this type are
discussed in Chapter 10—Steel Truss Bridges.
An arch bridge can be so designed and built to release live load moments
at crown and/or springing. As shown in Figure 9.4, an arch bridge can be
classified as (1) nonhinge arch, (2) one-hinged arch, (3) two-hinged arch,
and (4) three-hinged arch.
Fixed (hingeless) arch
(a)
One-hinged arch
Two-hinged arch
ree-hinged arch
(b)
Figure 9.4
Illustration of (a) fixed and (b) hinged arch bridges.
Search WWH ::
Custom Search