Concrete has a notable capacity against compression stresses but very little capacity against tension stresses (it cracks easily). One strategy to counteract this weakness in tension involves using wires or rods to prestress the concrete beam in regions where flexural tension can be anticipated. Consider the simply-supported beam shown, which has a rectangular cross section of 18" x 12". If concrete has specific weight of 150 pcf (pounds per cubic foot) determine the required tension in rod AB, which runs through the beam so that no tensile stress is developed in the concrete at its center section a-a. Neglect the size of the rod and any deflection of the beam. 16 in. B÷2 in. 18 in. 6 in. 6 in. - 4 ft- - 4 ft

Concrete has a notable capacity against compression stresses but very little capacity against tension stresses (it cracks easily). One strategy to counteract this weakness in tension involves using wires or rods to prestress the concrete beam in regions where flexural tension can be anticipated. Consider the simply-supported beam shown, which has a rectangular cross section of 18" x 12". If concrete has specific weight of 150 pcf (pounds per cubic foot) determine the required tension in rod AB, which runs through the beam so that no tensile stress is developed in the concrete at its center section a-a. Neglect the size of the rod and any deflection of the beam. 16 in. B÷2 in. 18 in. 6 in. 6 in. - 4 ft- - 4 ft

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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This course EHide blocks An aluminum pipe is filled in concrete is subjected to a pure compressive force as shown in the figure below. Determine the factor of safety against compressive stress acting on the column. The pipe has an outer diameter of 45 mm and inner diameter of 35 mm. The aluminum and the polymer concrete have the following material properties: Young's modulus: Eal = 70 GPa (aluminum), Ecr = 30 GPa (concrete). Yield compressive strength: Sy-al = 180 MPa (aluminum), Sy-cr 60 MPa (concrete). 100 kN 500 mm Select one: O FS = 1.5 O FS = 1.7 O ES- 19 5:45 PM 86°F Light rain ENG 6/18/2021
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