Response structure analysis of prestressed box girder concrete bridge due to earthquake loads

The damage of the bridge structure that occurs in Indonesia is almost close to the number of bridge construction. The damage condition is also related to the influence of Indonesia on active tectonics and volcanic pathways which cause damage to the bridge structures. The analysis of the structural response of the prestressed box girder concrete bridge aims to identify the value of the displacement structure on the bridge pier against the earthquake load. Meanwhile, the structure responses numerical analysis of the prestressed box girder concrete bridge using MIDAS CIVIL software. The analysis of structure response prestressed box girder concrete-bridge structure is carried out with three soil conditions, that is hard soil, medium soil, and soft soil. The results of the study, the displacement value on the pier bridge on X direction for hard soil conditions is 1.26 cm, medium soil is 1.53 cm, and soft soil is 2.02 cm. Thus, it can be concluded that the value of the bridge displacement due to the planned earthquake load on hard soil conditions is 21.4% smaller than that in the medium-soil condition and 60.32% smaller than the soft soil.