Structural behavior of open truss FRP bridge without side support

Lightweight makes the advantage of Fiber Reinforced Polymer (FRP) as one of the choices of truss bridge without side support materials. The simple shape of the structure and bridge connection system is believed to be the reason the bridge with this type of structure can use in emergencies that require rapid mobilization and installation. However, with the limited choice of FRP structural element profiles available, combined profile preparation was carried out in the structure to be used as a truss bridge structure profile. This paper describes the structural response identification of the use of a combined profile as seen from static and dynamic load testing of a full-scale bridge structure with a 16-meter span that planned to use as a pedestrian and light vehicle bridge. The load is applied in stages to be able to observe changes in the response of the structure and connection system. The results show that the bridge without side support has a load-bearing capacity that is strongly influenced by the stability of the compressive members and connection systems, which is very visible in the dynamic characteristics of the bridge in the lateral direction which is quite far when compared with the tests in other references.