Investigation and Analysis of Bending Moment of Transit structure Under the Effects of Applied Forces

Structural systems of cable-stayed bridges can be used for the construction of bridges. There are two ways to use cables in bridges: ۱. Bridges with stretched cables. ۲. Bridges with parabolic cables. Bridges with parabolic cables consist of two long legs. are formed that are placed on both sides of the opening and two bundles of cables that pass over the bases and hang in the opening and the throne. bridge by A number of vertical hangers is hung from the mentioned cables or bear the incoming load directly. However, in bridges with stretched cables. The bridge is made up of several cables that connect to one leg. They are installed high and are taken in several places. By examining the implemented cable bridge systems, we come to the conclusion that the design of these systems has always been considered in a completely linear and two-dimensional way, which withstand the forces in two dimensions, which causes These types of bridges do not have a good resistance against lateral dynamic forces, if bearing forces in three dimensions increases their resistance. Also, the use of cable towers next to the span of the bridge, although it makes it bear the force against the lateral forces, but it reduces the sense of suspension in the space, which is not desirable. Metal (cable bridge) has been examined. The general results showed that the structural systems of conventional pedestrian bridges have sufficient capacity against static and dynamic loads. In this research, the amount of displacement of the bridge under the effect of different loads has been investigated, as well as the modal analysis of the bridge in question .

Keywords:

Transit Structure , Bending Moment , Analysis