Problem 1. Given a beam having a width = 300mm and depth = 600 mm. Strength of materials: fc' = 28 MPa; fy 414 MPa. Use main bar: 5 – 20 mm Ø bar; tie bar 10 mm Ø bar; concrete cover = 40mm. Use minimum requirements by NSCP 2015. Consider the following cases: CASE 1: place the main bars in single layer. = b. CASE 2: place the main bars in two layers: 1st layer = 3-20mm0; 2nd layer = 220mmø. Clear spacing between layer of bars = 25 mm. c. CASE 3: place the main bars in two layers: 1st layer = 3 – 20mmø; 2nd layer = 2 - 20mm0. Clear spacing between layer of bars = 45 mm. Required: a. Depth of the compression block. b. Depth of the neutral axis. c. Stress and strain of the tension steel. d. Nominal strength e. Design moment strength. f. Give comments/observations about the results in each case.

Problem 1. Given a beam having a width = 300mm and depth = 600 mm. Strength of materials: fc' = 28 MPa; fy 414 MPa. Use main bar: 5 – 20 mm Ø bar; tie bar 10 mm Ø bar; concrete cover = 40mm. Use minimum requirements by NSCP 2015. Consider the following cases: CASE 1: place the main bars in single layer. = b. CASE 2: place the main bars in two layers: 1st layer = 3-20mm0; 2nd layer = 220mmø. Clear spacing between layer of bars = 25 mm. c. CASE 3: place the main bars in two layers: 1st layer = 3 – 20mmø; 2nd layer = 2 - 20mm0. Clear spacing between layer of bars = 45 mm. Required: a. Depth of the compression block. b. Depth of the neutral axis. c. Stress and strain of the tension steel. d. Nominal strength e. Design moment strength. f. Give comments/observations about the results in each case.

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.7P: Estimate the transverse tensile strength of the concrete in Problem 12.6.

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