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EXAMPLE 8.7 A cantilevered portion of a prestressed concrete bridge with a rec- tangular cross-section, 600 mm wide and 1650 mm deep, is 8 m long and carries a reaction of 350 kN from the suspended span at the free end, together with a uniformly distributed load of 60 kN/m inclusive of its own weight. The beam is prestressed by 7 cables each carrying a force of 1000 kN, of which 3 are located at 150 mm, 3 at 400 mm and 1 at 750 mm from the top edge. Calculate the magnitude of the principal stresses at a point 550 mm from the top of cantilever at the support section.

EXAMPLE 8.7 A cantilevered portion of a prestressed concrete bridge with a rec- tangular cross-section, 600 mm wide and 1650 mm deep, is 8 m long and carries a reaction of 350 kN from the suspended span at the free end, together with a uniformly distributed load of 60 kN/m inclusive of its own weight. The beam is prestressed by 7 cables each carrying a force of 1000 kN, of which 3 are located at 150 mm, 3 at 400 mm and 1 at 750 mm from the top edge. Calculate the magnitude of the principal stresses at a point 550 mm from the top of cantilever at the support section.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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EXAMPLE 8.7 A cantilevered portion of a prestressed concrete bridge with a rec- tangular cross-section, 600 mm wide and 1650 mm deep, is 8 m long and carries a reaction of 350 kN from the suspended span at the free end, together with a uniformly distributed load of 60 kN/m inclusive of its own weight. The beam is prestressed by 7 cables each carrying a force of 1000 kN, of which 3 are located at 150 mm, 3 at 400 mm and 1 at 750 mm from the top edge. Calculate the magnitude of the principal stresses at a point 550 mm from the top of cantilever at the support section.
Transcribed Image Text:EXAMPLE 8.7 A cantilevered portion of a prestressed concrete bridge with a rec- tangular cross-section, 600 mm wide and 1650 mm deep, is 8 m long and carries a reaction of 350 kN from the suspended span at the free end, together with a uniformly distributed load of 60 kN/m inclusive of its own weight. The beam is prestressed by 7 cables each carrying a force of 1000 kN, of which 3 are located at 150 mm, 3 at 400 mm and 1 at 750 mm from the top edge. Calculate the magnitude of the principal stresses at a point 550 mm from the top of cantilever at the support section.
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