A concrete beam is reinforced by three steel rods placed as shown. The modulus of elasticity is 3 × 106 psi for the concrete and 29 × 106 psi for the steel. Using an allowable stress of 1342 psi for the concrete and 20 ksi for the steel, determine the largest allowable positive bending moment in the beam. 16 in. -in. diameter 8 in. 2 in. The largest allowable positive bending moment in the beam is kip-ft.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Question

9

A concrete beam is reinforced by three steel rods placed as shown. The modulus of elasticity is 3 × 106 psi for the concrete and 29 ×
106 psi for the steel. Using an allowable stress of 1342 psi for the concrete and 20 ksi for the steel, determine the largest allowable
positive bending moment in the beam.
16 in.
-in. diameter
8 in.
2 in.
The largest allowable positive bending moment in the beam is
kip-ft.
Transcribed Image Text:A concrete beam is reinforced by three steel rods placed as shown. The modulus of elasticity is 3 × 106 psi for the concrete and 29 × 106 psi for the steel. Using an allowable stress of 1342 psi for the concrete and 20 ksi for the steel, determine the largest allowable positive bending moment in the beam. 16 in. -in. diameter 8 in. 2 in. The largest allowable positive bending moment in the beam is kip-ft.
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