Pick up the assumption for the design of a pre-stressed concrete member from the following:
A)A transverse plane section remains a plane afterbending
B)During deformation limits, Hook'slaw is equally applicable to concrete as well asto steel
C)Variation of stress in reinforcement due to changes in external loading is negligible
D)All the above

Question

Quizplus · Accepted Answer

All the options listed are assumptions commonly made in the design of pre-stressed concrete members. These assumptions simplify the analysis and design process by providing a basis for calculating stresses and deformations in the material. Option A assumes that plane sections before bending remain plane after bending, which is a fundamental assumption in bending theory. Option B assumes that both concrete and steel follow Hooke's law within certain deformation limits, allowing for a linear relationship between stress and strain. Option C assumes that the variation of stress in the reinforcement due to changes in external loading is negligible, simplifying the analysis of pre-stressed members under varying loads.

Pick Up the Assumption for the Design of a Pre-Stressed