Design of Plate Girder Bridge by AISC ASD method 1 Course Teacher: Ataur Rahman, Assistant Professor, CE, KUET DESIGN OF PLATE GIRDER BRIDGE CE-3112 1. Design Specification for plate girder bridge The basic difference between beam and girder is their web slenderness ratio h/t w . When this value is greater than 760/F b , the beam is normally called girder. When no local buckling is allowed to form on the compression flange, the girder is called compacted section otherwise it will be called as non- compacted section. Depending on the type of girder, use Chapter B, F and Chapter G accordingly. 2. Design method 3. Work out Examples Design a Welded plate girder with a simply support span of 56 ft to support a uniform load of 3kips/ft (including girder self weight) and two concentrated loads of 75 kips located 20 ft from each end. The compression flange is laterally supported only at point of concentrated load. Use ASTM A 36 steel and the AISC design guideline. Use also AASHTO bridge design manual whenever deemed necessary. Solution: 20 ft 16 ft 20 ft 75 kips 75 kips 3 kips/ft 159 99 24 99 159 24 Shear Diagram (kips) M max = 2676 2580 2580 Moment Diagram (kip-ft)
DESIGN OF PLATE GIRDER BRIDGE
Jun 18, 2023
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