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Showing results for tags 'beam design'.
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dear all, i have some questions and i am hoping to find some answers from you kind people. 1) when we use doubly reinforced beams how can be obtain economy be controlling ceiling height ? 2) where do we use bar curtailment and bent up bars in beams because there are not ACI provisions related to bar curtailment (as far as i know) 3)i have seen examples in books they calculate steel area for beams and they provide combination of different dia bars to satisfy that area why they do it because they can satisfy same area using same dia bars ? 4)which design method Etabs uses. LRFD or ASD? 5) how do we design the hanger bars. what is ACI provision for it? 6)where do we use inclined stirrups in beams ? 7) how the longitudinal reinforcing can be used as shear reinforcement ? Thank you all in advance. Looking forward to your responses.
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Assalam o alaikum, I was reading ETABS concrete frame design manual ACI 318-08. In beam design section, it gives two formulae which I am unable to find in books. One formula for stress block depth and one formula for negative steel calculation. I have highlighted the formulae in below images. The manual design using these formulae and conventional formulae gives the same result. But kindly guide me from where I can get derivation of these formulae or theory behind this.
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i am getting more reinforcement in bottom even though i am getting more moment values at support in few particular areas ..i am not sure why etab is showing more reinforcemet at bottom in these particular grids? any one having any idea? untitled.bmp
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