Question 1. Which of the following contributes positively to shear strength of p

Question

Question 1. Which of the following contributes positively to shear strength of prestressesd concrete structures?

select one or more:

a. vertical stirrups

b. prestressing force

c.longitudinal tensile steel

d.aggregate interlock

e.uncracked concrete

f. tensile force

Question 2. In the truss analogy use to analyse the behaviour of concrete, which represents the members of the analogous truss:

1. vertical member:

A. stirrups/shear reinforcement  

B. concrete compressive zone+ longitudinal compressive reinforcement

C. longitudinal prestressing steel+ non-prestressed reinforcement in the tensile zone

2. top compressive chord:

A. stirrups/shear reinforcement  

B. concrete compressive zone+ longitudinal compressive reinforcement

C. longitudinal prestressing steel+ non-prestressed reinforcement in the tensile zone

3. bottom chord:

A. stirrups/shear reinforcement

B. concrete compressive zone+ longitudinal compressive reinforcement

C. longitudinal prestressing steel+ non-prestressed reinforcement in the tensile zone

Explanation / Answer

As per Chegg rules, first question is enough to answer.

1. Incase of pre stressed members a pre stressing force applied before application of concrete. However, the shear strength of the member is taken care by stirrups itself.

So a is correct.

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