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Define the pre-tensioned concrete construction
We understand that in the pre-tensioned concrete construction, stretched tendons are provided in the concrete moulds at the time of casting of concrete. In the post-tensioned concrete construction, this is not a requirement as the ducts are fitted inside the moulds at the time of casting of concrete. The transfer of prestress takes place early in the case of pre-tensioned concrete members (it takes place at the time of cutting of tendons after the concrete has sufficiently hardened) while the transfer of prestress, in the case of post-tensioned concrete members, takes place when tendons are placed inside ducts and anchored in a stretched condition.
Q. Show the Design of Howe truss? Design of Howe truss is the opposite to that of Pratt truss in that the diagonal members are slanted in the direction opposite to that of Prat
measurement of gauge box for sand ?
State the process to calculate the Transmission Length It is the distance required at the end of a concrete member for developing the maximum tendon stress by bond.
Q. Evaluate the Length of guide bund? For encouraging axial flow through the bridge, upstream length of guide bund may be kept 1.0 to 1.5 times the bridge length and downstream
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CASTE DISCRIMANIMATION
Determine the types of losses of prestress A loss of prestress will affect the stress distribution on a section of the member. It is therefore necessary to estimate the probabl
cold driven rivet
Q. Define Hammer efficiency and coefficient of restitution? Hammer efficiency refers to ratio of kinetic energy of hammer to the rated energy (or potential energy). Basically i
• The bar carries equal weights at equal distances from the weight lifter's hands • The reactions (R) at the hands must be equal and opposite to the weights • The pair of for
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