By Seun Sambath

Development MANAGEMENT
Concept-Develop-Execute-Finish
__________________________________________________________________________________
Seun Sambath, PhD
Concrete Structures
(ACI 318-05)
in Mathcad
Sixth Edition
Phnom Penh 2010
___________________________________________________________________________________
Address: #M41, St.308, Sangkat Tonle Basac, Khan Chamkarmon,
Phnom Penh, Cambodia.
Tel: 012 659 848.

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Additional info for ACI 318-05 Mathcad in Concrete Structures

Example text

98 "is safe" if FS  1 The_beam  "is safe" "is not safe" otherwise F. Determination of Concrete Dimension and Steel Area Given: M u f'c fy Find: b  d As Step 1. 85 β1   fy ε u  ε t   ϕ = ϕ εt 2 bd = Mn R Mn Option 1: R b= d 2 Mn Option 2: R d= b 3 Option 3: k= b d= d Step 2. 85 f'c  R  As = max ρ ρmin  b  d Step 3. 976  mm 25mm  2   11. Design of Doubly Reinforced Beams ρ  ρmax : the beam is singly reinforced (with tensile reinforcements only) ρ  ρmax : the beam is doubly reinforced (with tensile and compression reinforcements) A.

Determination of Moment Capacity Given: b w  d b d t h f As f'c fy Find: ϕMn Step 1. 85 f'c b a  hf a  hf : the beam is rectangular : the beam is tee Step 2. 5. Determination of Steel Area Given: M u b w  d d t b h f f'c fy Find: As Step 1. 9 M u  ϕMn : the beam is rectangular M u  ϕMn : the beam is tee Step 2. 255 cm 2 13.

Determination of Tensile Steel Area Given: M u b  d d t d' A's f'c fy Find: As Step 1. 1. 2. 2 Step 2. 575 cm 2 12. 1. 2. 3. 4. Determination of Moment Capacity Given: b w  d b d t h f As f'c fy Find: ϕMn Step 1. 85 f'c b a  hf a  hf : the beam is rectangular : the beam is tee Step 2. 5. Determination of Steel Area Given: M u b w  d d t b h f f'c fy Find: As Step 1. 9 M u  ϕMn : the beam is rectangular M u  ϕMn : the beam is tee Step 2. 255 cm 2 13.

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