ARCH 2615 ARCH 2615 Practice Prelim 3 (Reinforced concrete columns and T-beams)

Jonathan Ochshorn

© 2020 Jonathan Ochshorn.

Directions: Enter values in yellow fields.

Press "update" button. Solutions will be displayed. (Based on ASD method, AISC Manual of Steel Construction, 14th Edition. More detailed explanations and examples can be found in my text.) There will also be short-answer questions and/or sketches on the prelim, not included in this calculator.

2–3. Design T-beam design for negative and positive moment (50 points): From Table A-5.5, φ = 0.9. Note that M_u < φbd²R.

2. Design for negative moment with M_u given (25 points)
a) Find the required steel area, A_s, and select the specified number of rebars from Table A-5.2.
b) Check that the steel ratio is between the minimum and maximum steel ratio.
d) Check bar fit from Table A-5.3.

3. Design for positive moment with M_u given (25 points)
a) Find the effective width, b.
b) Find the required steel area, A_s, and select the specified number of rebars from Table A-5.2.
c) Check that the steel ratio is between the minimum and maximum steel ratio. d) Check bar fit from Table A-5.3.

Figure 1. Framing plan and section through T-beam showing dimensions: A = clear span of T-beam; B = centerline spacing; C = slab thickness; D = web or stem width; E = total T-beam thickness; F = thickness of beam under slab; and G = clear span of slab. Values A – E can be changed in the calculator below (values F and G can be determined from the other values).

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Disclaimer: This calculator is not intended to be used for the design of actual structures, but only for schematic (preliminary) understanding of structural design principles. For the design of an actual structure, a competent professional should be consulted. This is a beta version; please report any strange results!

First posted April 23, 2019 | Last updated April 23, 2019