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Analysis of presress
In pre-stressed structural elements, stretched tendons are placed inside concrete. The tensile stresses of the tendons are transferred to concrete in the form of compressive stresses (due to bond between tendons and concrete in the case of pre-tensioned elements and through end anchorages in the case of post-tensioned elements). These forces are generally axially transferred in concrete as shown in =Figure. Here, the pre-stressing force is shown to be applied at the location of centroidal axis of the member (i.e. concentrically applied), as the tendon has been placed at the centroidal axis.
What is the meaning of Elastic Shortening of Concrete At the transfer stage, compressive prestressing force is transferred to the concrete. Due to this compressive force, concr
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Example: Convert the following reduced bearings into whole circle bearings: (i) N 65° E (ii) S 43° 15′ E (iii) S 52° 30′ W (iv)
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Analyse the state of stress at the critical section: A prismatic bar of circular section with 80 mm diameter is subjected to bending moment of 5 kN-m and a torque of 7 kN-m. A
Q. What is Admixtures? These are the substance which are added to the concrete to improve its qualities either its placing or in its subsequent performance. An admixture may be
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