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Explain the shrinkage strain of concrete
Shrinkage of concrete depends only on the interval of time and the moisture conditions, but is independent of the stresses in the member due to loads. The loss of prestress due to shrinkage of concrete shall be the product of the modulus of elasticity of steel and the shrinkage strain of concrete.
A square pile group of 16 piles passes by a filled up soil of 3 m depth. The pile diameter is 25 cm and pile spacing is 75 cm. If the unit cohesion of the material is 18 kN/m 2 an
Question What are thought in determining whether casings have to be left in for mini-piles ? Answer Contrary to most of pile design, design of min-piles is controlled
Hoyers long line system pre-tensioning When concrete attains the required strength, jacks are released and tendon wires in-between various units are cut.
Question How does an engineer determine digit of cells for concrete box girder bridges ? Answer If depth of a box girder bridge exceeds 1/6 or 1/5 of bridge width, then it is o
A vehicle for landing on the moon has a mass of 4500kg. The damped spring undercarriage system of the vehicle has a stiffness of 450kn/m and a damping ratio of 0.2. The rocket lift
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Question In designing of service reservoirs , straight reinforcement in walls of reservoirs is placed at external layer. Give some specific and main reasons? Answer
Q. Defaults for precast concrete pipes made by spinning? Small diameter precast concrete pipes are generally manufactured by spinning method. The spinning method fundamentally
Define the Approach Velocity Typical problems have negligible approach velocity. v 1 = Q/A, where A = the cross-sectional area of flow in the channel. The value is not the ve
Define Types of Seismic Isolation Bearing - Rubber Bearings? Seismic isolation is obtained by two types of isolation bearings. a) Rubber bearings b) Friction pendulum bea
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