Studi Perbandingan Perencanaan Ulang Struktur Atas Jembatan Jurang Gempal Menggunakan Prestressed Concrete Box Girder Dan Prestressed Concrete I Girder

Abstract

Generally, bridge definition is a construction to connect two sections of road that disconnected by obstacles such as deep valley, river flow, lake, irrigation canals, river, railways, transverse highway in different level and others. With the development of technology, there is various type of bridge that were built for mobilization purpose whether it is based on the bridge’s function, where the bridge built, construction material and type of structure that applied to the bridge. Jurang Gempal bridge built above the Bengawan Solo river that extends between Solo-Wonogiri roadway that located in Wonogiri district, Central Java. Jurang Gempal bridge consists of two bridges, there is north side and south side, both using steel frame structure. The north side bridge has not been used because of damage on the upper structure. In this final project, comparation study of jurang gempal bridge’s upper structure redisign using prestressed concrete box girder and prestressed concrete I girder will be made. Both of the design have 40 m long and have the same specification. The regulation used in this research are bridge load standard (RSNIT-02-2005), concrete structural design for bridge (RSNIT-12-2004) and earthquake design standard for bridge (SNI 2833-2008). Bridge structural analysis using SAP2000 V.11 and Microsoft Excel 2013. The result of Prestressed Concrete Box Girder includes 2,1 m high of girders, 6,41 mm2 area, 27 pieces of tendons, and 0,0146 m of deflection. While the result of prestressed concrete I girder includes 2,1 m high of girders, 5,09 mm2, 20 pieces tendons, and 0,0136 m of deflection. From the results above, the conclution is prestressed concrete I girder is more effectively used for 40 m long in Jurang Gempal bridge’s upper structure redesign.