An 8.0x8.0m interior bay in a continuous floor of an offshore platform has to be designed under the following support and load conditions: • The floor is composed of 10cm thick concrete-steel composite (p-2,500 kg/m3) supported over open-web steel joists placed at every 1.25m intervals. • The continuous joists (beams) transmit loads to main girders supported at 8.0m interval (both ways) by interior columns. • Self-weight of open-web steel joists = 200 N/m. • Live loads for the floor include (1) distributed load of 5.0 kN/m2 and (2) a central concentrated load of 5.0 kN. • Load factors: dead load = 1.4 and live load = 1.6.
An 8.0x8.0m interior bay in a continuous floor of an offshore platform has to be designed under the following support and load conditions: • The floor is composed of 10cm thick concrete-steel composite (p-2,500 kg/m3) supported over open-web steel joists placed at every 1.25m intervals. • The continuous joists (beams) transmit loads to main girders supported at 8.0m interval (both ways) by interior columns. • Self-weight of open-web steel joists = 200 N/m. • Live loads for the floor include (1) distributed load of 5.0 kN/m2 and (2) a central concentrated load of 5.0 kN. • Load factors: dead load = 1.4 and live load = 1.6.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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It is required to:
(a) Compute the design moments for the open-web steel joists.
(b) Calculate the approximate force present in a typical upper/lower chord bar member at midspan with a depth 0.75 m.
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