Four steel bars jointly support a mass of 25 x 10³ kg. Initially the temperature is 25°C. Bars A and D have a cross- sectional area of 480 mm². For bars B and C, the cross-sectional area is 360 mm². Determine the elongation of bar A when the temperature becomes 60°C. Also, find the axial stress developed in bar C. Use E = 200 GPa and α = 11.7 x 10-6 m/ (mºC). 800 mm 0 20 60 с 20

Four steel bars jointly support a mass of 25 x 10³ kg. Initially the temperature is 25°C. Bars A and D have a cross- sectional area of 480 mm². For bars B and C, the cross-sectional area is 360 mm². Determine the elongation of bar A when the temperature becomes 60°C. Also, find the axial stress developed in bar C. Use E = 200 GPa and α = 11.7 x 10-6 m/ (mºC). 800 mm 0 20 60 с 20

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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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

Four steel bars jointly support a mass of 25 x 10³ kg. Initially the temperature is 25°C. Bars A and D have a cross-
sectional area of 480 mm². For bars B and C, the cross-sectional area is 360 mm². Determine the elongation of bar
A when the temperature becomes 60°C. Also, find the axial stress developed in bar C. Use E = 200 GPa and a =
11.7 x 106 m/ (m°C).
800 mm
25000 kg
20

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