ABCDEFGHIJKLMNOPQRSTUVWXYZ
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 Company:
AL HAMED COMPANY
 Ó 2001 Techno Consultants
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 Address: RC8007 Ver:010104
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 User Registration No:
Unregistered Copy
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 Made by Date Page No
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 Project:
TREATMENT PLANT
SURK2 January 01
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 Client:
UAE ARMED FORCES- DMW
 Checked Job No Revision
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 Element:TANKS2001/45-4500
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Liquid Retaining Reinforced Concrete Section to BS 8007& BS 8110
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User Ref:
Wall 300 Thick
Datastore No
1001
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Description:
Wall fcu=35, W=0.2mm, h=300, c=64, dia=16, s=200, hs=150
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Size & Material Properties:
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Concrete strength, fcu
40N/mm2Steel strength, fy
(Deformed Type 2)
460N/mm2
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Crack width, Wmax
0,1mmSteel modulus, Es200000N/mm2
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Restraint factor, R
0,5
Concrete modulus, Ec = 5,500 sqrt (fcu / 1.5) / 2
14201N/mm2
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Section Thickness, h
200mmModular ratio, m = Es / Ec14,1
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Concrete cover, c
75mm
Average bond strength between concrete & steel, fb
2,4N/mm2
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 Bar size, f12mm
Direct tensile strength of immature concrete, fct
4N/mm2
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Bar spacing, s
200mmEffective depth, d = h - c - f / 2119mm
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gms for steel
1,15
Steel area provided in b=1000 mm wide zone, As
565mm2
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Type of reinforcement
1
Steel ratio provided over gross area, pg = As / (b h)
0,0028250,0013
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Serviceability Limit State:
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Moment Capacity:
Steel ratio provided, p = As / (b d)
0,004748
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Neutral axis depth, x = [ - m p + sqrt {(m p)2 + 2 m p} ] d
36,3mm
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Lever Arm, z = d - x / 3
106,9mm
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Distance to nearest steel bar surface, acr =sqrt[(s/2)2+(c+f/2)2] - f/2
#NAME?mm
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Strain due to the stiffening effect of concrete between cracks, as per Appendix B.4 of BS 8007:
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e2=kb(h-x)2/[3EsAs(d-x)] where k=1 when Wmax=0.2 & 1.5 when Wmax=0.1
#NAME?
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Average strain at the tension face, em=Wmax[1+2(acr-c)/(h-x)] / (3 acr)
#NAME?
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Stress in steel fs = Es (e2+em) (d-x) / (h-x) <= fy / gms
#NAME?N/mm2
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Service Moment Capacity, Ms= fs As z
#NAME?kNm/m
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Applied Ms
15kNm/m#NAME?
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Ultimate Limit State:
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Moment Capacity:
Neutral axis depth, x = fy As / (0.405 fcu b gms) <= 0.5 d
#NAME?mm
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Lever Arm z = (d - 0.45 x) <= 0.95 d
#NAME?mm
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Ultimate Moment Capacity, Mu = 0.405 fcu b x z
#NAME?kNm/m
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Applied Mu
25kNm/m#NAME?
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Shear Capacity:
Design concrete shear stress from Table 3.8 of BS 8110: Part 1, vc
#NAME?N/mm2
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Ultimate Shear Capacity of concrete section alone, Vc = vc b d
#NAME?kN/m
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Applied Vc
61,6kN/m#NAME?
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Minimum Reinforcement for the Control of Thermal & Shrinkage Cracking:
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1,0
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Wall/Suspended-slab/Top of ground slab: Surface
Zone Depth, hs
#NAME?mm
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Coefficient of Thermal Expansion for mature concrete, a
1,00E-05
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T1, fall in temperature between the hydration peak and ambient
24Co
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T2, fall in temperature because of seasonal variations
20Co
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Effective Strain, e = R a (T1+T2)
0,000220
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Likely maximum spacing of cracks, Smax = Wmax / e
454,5mm
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Steel requirements in surface zone, as per Appendix A of BS 8007:
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1- Steel ratio to control crack widths, pcrw = fct f / (2 fb Smax)
0,022000
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2- Critical Steel ratio to distribute cracking, pcrit = fct / fy
0,008696
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3- Minimum Steel ratio as per Table A.1 BS 8007, pmin
0,003500
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Hence, Steel ratio required, preq
0,022000
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Required Steel Area in 1000mm x hs deep surface zone = 1000 preq hs
#NAME?mm2
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#NAME?
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RC8007-010108
Ó 2001 Dr Shaiq Khan, Techno Consultants Ltd
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