Hi Brooks, I was wondering if there is any reference books that helps strengthen our understanding of AS 3600 in PLAIN English, e.g. something combining hand calculation ans specific clauses. Most books (Well, of course including AS itself) are just very hard to keep going through, and there is basically none Australian-based. Thank you!!
@SavasPapasokratis
2 жыл бұрын
did you find anything please ?
@arionourfardi1528
4 жыл бұрын
Hi Brooks, could you please explain more about the '10% maximum effect' mentioned at 27:50? and 'estimate check'? and how is the shrinkage related to shear? Cheers.
@messrzeddy5001
5 жыл бұрын
Why does the derivation of Z for the calculation for Muo(min) consider reinforcement? If the minimum moment is based on 1.2x the cracking moment of the concrete, should that not be taken from an unreinforced section?
@ClearCalcs
5 жыл бұрын
Hi Messr Zeddy, Thanks for your question. For the benefit of any other readers, your question refers to the minimum strength requirements discussed at 12:08. First, I want to distinguish between the "uncracked" moment of the beam and the "unreinforced" (or "gross") moment of the concrete. As long as your reinforcement is fully developed (that is, its development length has been reached), then the concrete is fully bonded with the reinforcement and it will act compositely with the reinforcement. In such a case, the reinforcement will help prevent tension cracking in the concrete, and the uncracked moment should therefore include the effects of the reinforcement as described at 10:11. The Muo(min) requirement is specifically a test on the bending strength "at critical sections" (see Cl 8.1.6.1), and at a critical section, your reinforcement should definitely be detailed such that it is fully developed. Z is defined in the clause as the "section modulus of the uncracked cross-section". The reason I note in the webinar that you will usually meet the minimum bending strength requirement by means of the second equation I cite (the Ast minimum - Eqn 8.1.6.1(2)), is that the standard's wording in Cl 8.1.6.1 is specifically as follows: "For reinforced concrete cross-sections, this requirement shall be deemed to be satisfied ... if [the Ast minimum is met]". That is, the standard implies that a minimum quantity of reinforcement is a means of satisfying the Muo(min) equation - further implying the effects of reinforcement are included in Muo(min). I hope this answers your question, and do let us know if you have any other questions!
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