Can we use prestressing tendons of 270 ksi grade as normal reinforcement (grade 60 ksi)?

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What is the reason of collapse of water tank shown in the attached you tube?

https://www.youtube.com/watch?v=WLEkC_JbTsQ

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Which type of multiple-cell box girder is better, cells connected by top flanges or cells connected both by top and bottom flanges?

How we can design box girder bridge?

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Why do BS8007 specify the allowable crack width of water retaining structure as 0.2mm for severe or very severe exposure?

Why 0.2 mm crack width?

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What is the effect of rusting on steel reinforcement?

How does rust affect on the bonding between steel bars and concret?

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In “High strength concrete” in buildings, 56 or 91-day compression test results are sometimes adopted instead of 28-day compression test results. Why?

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What is the difference between working stress approach and limit state approach?

What about difference between those approaches regarding load and material safety factor?

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In carrying out compression test for concrete, should test cubes or test cylinders be adopted?

Relation between cubes and cylinder

02 March 2017 5,836 4 View

If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?

Non destructive tests

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It is not necessary to design nominal reinforcement to piles. Is it true?

Can we use same code provisions of columns for piles?

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Can a concrete structure be completely free of expansion joints and contraction joints?

Assume that there is no differential settlement.

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What should be the sample container for the hydrothermal reaction in a microwave reactor at 180 °C for 10 min at the heating rate of 5 °C per minute?

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Masonry Interaction Module ABAQUS?

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Amjad Albayati

couldn't be used to avoid sudden failure because the second one is ductile material

Nazar K Ali Oukaili

Dr Abbas

In 1989 I tried this to use high strength steel as non-prestressed steel in flexural member which I tested up to failure.

The result were very big values for crack width and deflection.

It is no recommended to use.

Abbas AbdulMajeed Allawi

Thank you Dr Nazar for answe