The International Information Center for Structural Engineers

Thursday, 16 May 2019 09:00cat

## Calculate the Axial Forces of the Truss Members

Written by  TheStructuralEngineer.info

Find the axial forces of the members 2-3, 9-3 of the truss for the given loads.

Solution

From the equilibrium of the forces on the truss we have:

ΣFx = 0 -> H1 = 0

ΣM1 = 0 -> 200 * 4 - B5 * 8 = 0 -> B5 = 100KN

ΣFy = 0 -> B1 + B5  = 200KN -> B1 = 100KN

We consider the cross section T so as to calculate the axial forces on member 2-3 and 3-9. We consider the equilibrium of moments to the node 9.

ΣM9 = 0 -> 2 * 100 - S2-3 * 2 = 0 -> S2-3 = 100KN

From the quilibrium of forces at Y direction

ΣFy = 0 -> -S9-3 * sin45 + 100 = 0 -> S9-3 = 100 / sin45 KN

More in this category: « Torsional Moment-Stress

• Default
• Title
• Date
• Random
• ## Seaside Way Pedestrian Bridge in California received ENR's 'Best of the Best 2018' award

Hayaward Baker, Inc. (HBI) worked on the construction of the Seaside Way Pedestrian Bridge in Long Beach, California. The bridge