Beirut Arab University Dept. of Civil Engineering CVLE 424 Steel Design (II) Spring 2016 Project # 2 Due: May 20 , 2016

The 2-lanes roadway bridge shown in the figure is composed of four main girders spaced 2 m apart. The bridge is simply supported with a 22 m span and 12 m width. The main girders support a 16 cm RC deck. Assume un-shored construction.

Given:

# Material: St 37

# Own weight of the MG = 300 kg/m # SDL = 300 kg/m2

# Live loads = 600 kg/m2, Impact = 30 % # Studs: mm, H = 120 mm

# M24 H.T. Bolts (8.8) - E480 electrodes

Required:

a. Compute the maximum straining actions for an interior MG :

b. Design the MG using HEA section for composite action with the RC slab. Determine the required # of shear studs.

c. Redesign the MG as a built-up plate girder for non-composite construction. Assume LS & vertical stiffeners @ 2.0 m.

d. Locate, design & sketch the field splice for part (c).

Bridge Cross-Section

2.0m 1.0m 1.0m 2.0m 2.0m 2.0m 2.0m

Roadway width = 8.0m

22m

A B

Elevation

M