STUDY ALTERNATIF PERENCANAAN STRUKTUR ATAS JEMBATAN RANGKA BAJA TIPE BOWSTRING TRUSS

studi kasus : Struktur Atas Jembatan Rangka Baja Tipe Bowstring Truss Kabupaten Blitar

Abstract

Bowstring truss type bridge is a bridge structure whose structural elements resemble the letter X. Bowstring Truss type bridge is good for bridges with medium spans because the short element length reduces the risk of buckling in the frame. Through this thesis the author tries to plan an alternative structural design for the Bowstring Truss type steel truss bridge on the Blitar Regency log bridge. In this case the planning uses the LRFD (Load and Resistance Factor Design) method and for the modeling it uses the help of the STAAD Pro V8i program. The structure of the superstructure of the Bowstring Truss truss bridge consists of several main parts, namely longitudinal girders, transverse girders, main girders, upper wind ties, lower wind ties, upper transverse girders, sidewalks, vehicle floors and elastomeric placement which form a rigid unit so that it is safe. and comfortable in traffic on the bridge. As for the results of the planning and analysis obtained, the structure of the superstructure of the bridge uses a profile WF 400 x 200 x 8 x 13 (longitudinal girder), WF 700 x 300 x 13 x 24 (transverse girder), WF 400 x 400 x 13 x 21 ( main girder), 2L 175 x 175 x 15 (wind ties), WF 400 x 200 x 8 x 13 (top transverse girder).