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Midasit: 1. General Information

This document summarizes the design of a concrete beam section. It provides the material properties, design conditions, and checks various design requirements including tension and shear capacity, reinforcement areas, and clear cover. The section passes all checks, with the applied reinforcement areas exceeding the minimum required areas. Key details include a concrete compressive strength of 4,061 psi, 138 kip shear force, and reinforcement of 5 #8 bars and 3 #4 closed stirrups.

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58 views2 pages

Midasit: 1. General Information

This document summarizes the design of a concrete beam section. It provides the material properties, design conditions, and checks various design requirements including tension and shear capacity, reinforcement areas, and clear cover. The section passes all checks, with the applied reinforcement areas exceeding the minimum required areas. Key details include a concrete compressive strength of 4,061 psi, 138 kip shear force, and reinforcement of 5 #8 bars and 3 #4 closed stirrups.

Uploaded by

Funny & Informative
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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MIDASIT http://www.midasuser.

com
TEL:1577-6618 FAX:031-789-2001

MEMBER NAME : CB01

1. General Information
(1) Design Code : ACI318-11
(2) Unit System : lbf, in

2. Material 17.7165
(1) F'c : 4,061psi
(2) Fy : 60,916psi
(3) Fys : 60,916psi 5-#8

3. Design Conditions
(1) Section
Depth (h) : 31.50in
Cover : 1.575in

19.95
Width (b) : 19.69in 31.50

29.92
Span (l) : 33.46in
Dist. to Vu (a) : 17.72in
(2) Design Force
3-#4
Shear (Vu ) : 138kip
Tension (Nuc ) : 13.94kip
(3) Rebar
Tension Rebar : 5-#8 33.46
Closed Stirrup : 3-#4
(4) Bearing Plate
Width : 1.312ft
Height : 0.328ft
(5) Friction Factor : 1.400

4. Check Design Force


(1) Check Tension Force
Nuc = 13.94kip < 0.2Vu = 27.56kip
Nuc,applied = 27.56kip
Vu = 138kip > 13.94kip -> O.K

5. Check Section
(1) Check a/d ratio
a/d = 0.592 < 1.000 -> O.K
(2) Calculate effective depth required
Vu
dreq'd = = 11.49in < 29.92in -> O.K
0.2 ø f'c bw

6. Check Bearing Plate


(1) Calculate area of bearing plate
Vu
Areq'd = = 61.42in^2 < 62.00in^2 -> O.K
0.85 ø f'c
ø = 0.650 (Bearing)

7. Check Rebar Area


(1) Calculate rebar area for direct tension
Nuc
An = = 0.612in^2
øfy
Vu + Nuc (h-d)
Af = = 2.051in^2
ø fy 0.9d
Areq'd = An + Af = 2.663in^2
Aapplied = 3.950in^2
Areq'd / Aapplied = 0.674 -> O.K

8. Check Shear Strength


(1) Calculate rebar area
Avf = 1.200 + 1.287 = 2.487in^2
(2) Calculate shear strength
Vn = Avf fy μ = 209kip
Vn,max1 = 0.2 f'c Ac = 478kip
2018-11-01 1
MIDASIT http://www.midasuser.com
TEL:1577-6618 FAX:031-789-2001

MEMBER NAME : CB01

Vn,max2 = ( 480 + 0.08 f'c ) Ac = 474kip


Vn,max3 = 1600 Ac = 942kip
øVn = 157kip
Vu / øVn = 0.880 -> O.K

9. Determine Bar Area


(1) Calculate rebar area
Vu
Avf = = 2.187in^2
ø fy μ
(2) Determine primary tension rebar
As1 = 2Avf / 3 + An = 2.071in^2
As2 = Af + An = 2.663in^2
fck
Asmin = 0.04 Ac = 1.595in^2
fy
As = max(As1 , As2 , Asmin ) = 2.663in^2, Aapplied = 3.950in^2
As / As,applied = 0.674 -> O.K
(3) Determine shear rebar (Closed stirrups).
Ah ≥ 0.5(As - An ) = 1.025in^2, Aapplied = 1.200in^2
Ah / As,applied = 0.854 -> O.K
Space = (2/3d)/n = 6.649in

2018-11-01 2

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