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Question-What are three key types of reinforcement used in pre stressing?
Answer-(i)Spalling reinforcement -
Spalling stresses are established behind loaded area of anchor blocks and this causes breaking away of surface concrete. These stresses are induced by strain incongruity with Poisson's effects, by the shape of stress trajectories. (ii)Equilibrium reinforcement -Equilibrium reinforcement is necessary where there are several anchorages in which pre stressing loads are useful sequentially. (iii)Bursting Reinforcement -Tensile stresses are induced through pre stressing operation and maximum bursting stress occurs where stress trajectories are concave towards a line of action of load. Reinforcement is required to oppose these lateral tensile forces.
a) Explain Terzaghi's theory of bearing capacity of shallow strip foundations. Determine the three bearing capacity factors and give their values for Φ = 0' case. (b) Descreib
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A project engineer has ordered 100 hardwood boards, 1-1/4-in thick by 8-in wide and 8-ft long. The total board feet ordered is most nearly: Solution: 1.25" x 8" x 8' x 100
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A square pile group of 9 piles passes by a recently filled up material of 4.5 m depth. The diameter of the pile is 30 cm and pile spacing is 90 cm centre to centre. If the unconfin
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Calculate the Concrete Yield in Cubic Feet per Sack of Cement A concrete mix design is 1: 1.9: 2.8 by weight. The water cement ratio is 7 gallons of water per sack. The aggre
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