STUDI ALTERNATIF PERENCANAAN STRUKTUR ATAS FLYOVER MANAHAN DENGAN KONSTRUKSI BOX GIRDER PRATEGANG METODE SPAN-BY-SPAN

Studi kasus : Jalan layang / flyover Manahan, Surakarta, Jawa Tengah

Abstract

The design of the Manahan flyover uses a prestressed box girder with an external tendon system to streamline the combination of the relatively small volume of concrete and the prestressing force of the tendons so that a relatively small deflection is obtained in the span. The use of prestressed box girders is more profitable than the I-girder beam at a level crossing of the Solo - Yogyakarta railroad track after the Jl. Adi Sucipto - Jl. MT Hariyono towards Jl. Dr. Moewardi, Surakarta City because the method of implementing the I-girder beam causes more traffic jams. Statics analysis uses certain static and segmental implementation methods (span-by-span method) to obtain section properties of the box girder cross section. The rules that the author uses in the calculation are SNI 1725-2016, SNI 2847-2013. The discussion materials include tendon layout planning, loss of prestressed force, control of stress and deflection, box girder-shear reinforcement, and end block. The prestressed cable used is the VSL tendon type GC Grade 270, low relaxation strand type 6-37 units. The results obtained from the pre-stressed box girder planning are used 20 segmentals which are divided into 3 types of segments, namely the pedestal segment, the deviator segment, and the standard segment. Using 12 VSL type GC tendons with 35 strands per tendon. The deflection that occurs is 5.194 cm (     ) and there is no tensile stress.