Answered: b=10n $= ఎan CLR CVR =1.5"

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

The concrete beam shown is reinforced with 3 #9 bars. The clear cover is 1.5 in. Throughout and #3 ties are used. If 4 ksi concrete and 60 ksi steel are user the design moment strength will be most nearly 200, 230, 260, 290, or 320 kip-ft?

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Step 1

GIven data:

$B = 10 i n D = 22 i n A_{s t} = 3 \times \frac{π}{4} {(\frac{9}{8})}^{2} = 2.98 i n^{2} d (e f f e c t i v e d e p t h) = D - (1.5 + \frac{(\frac{9}{8})}{2}) = 22 - (1.5 + \frac{9}{16}) = 19.94 i n {f^{'}}_{ç} = 4 k s i f_{y} = 60 k s i$

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