Question 1The figure shows a main beam ABCD supporting two secondary beams at B and C. Given that LAB =3 m; LBc = 4 m; and LcD = 5 m. The point loads:At B: dead load = 200 kN; imposed load = 100 kNAt C: dead load = 160 kN; imposed load = 100 kNNeglect the dead load of the main beam, and do the following use Eurocode 3 (S275):(a) Assuming that continuous lateral restraint is provided, design the main beam with particularconcern on the cost-effectiveness.(b) Consider the situation when full lateral restraints are provided only at A, B, C and D. At thelocations of lateral restraints, nominal torsional restraints are provided, and the main beam isfree to rotate on plan at the location of lateral restraints. Check if the section selected in (a)can be used as the main beam in this case.(c) Under the situation in (b), select another steel section (different from the one in (a)) to workas the main beam.PBPcBDLABLBCLcD

Calculate the reactions RA +RD = 240+350 = 590 kn ......(1) Now taking moment about A…

n when full lateral restraints are provided only at A, B, C and D. At the estraints, nominal torsional restraints are provided, and the main beam is at the location of lateral restraints. Check if the section selected in (a) ain beam in this case. n (b) select another steel section (different from the one in (a)) to work

n when full lateral restraints are provided only at A, B, C and D. At the estraints, nominal torsional restraints are provided, and the main beam is at the location of lateral restraints. Check if the section selected in (a) ain beam in this case. n (b) select another steel section (different from the one in (a)) to work

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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