Tutorial 7 Solutions.pdf - CIVL4404 Semester 1 2017...

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CIVL4404, Semester 1, 2017: Tutorial 7 Solutions The girder is fabricated from heavily welding AS/NZS 3678, Grade 300 plates. A pair of OneSteel 300Plus 200UB29.8 is placed within the stiff bearing length b s = 150 mm for load bearing at the supports of the girder. The reaction at support is 2500 kN. Below figure shows the side view at support and cross section of girder. 1. Check the adequacy of the pair of stiffeners for yield capacity. Draw cross section of the web/load-bearing stiffeners compression strut that is considered by AS4100 for yielding under bearing load. 2. Check the adequacy of the pair of stiffeners for buckling capacity. Draw cross section of the web/load-bearing stiffeners compression strut that is considered by AS4100 for buckling under bearing load. 30 30 8 1260 2500 kN 200 200 UB 29.8 500
Design load R* = 2500 kN Girder section: d = 1260 mm, b f = 500 mm, t f = 30 mm, t w = 8 mm, d 1 = 1200 mm, f yw = 320 MPa Load bearing stiffeners: one pair, 2 x 200UB29.8, A s = 2*3820 = 7640 mm 2 , f ys = 320 MPa, I s = 29.1E6 mm 4 1. Yield capacity of the web/stiffeners compression member sy R R φ

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