Project:
Made By:
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Checked By:
Client:
Date:
Job Title
Job.No/ Rev.
CONCRETE PRESSURE ANALYSIS:
1.0. Concrete Parameters: C_Struc = C1 = C_Type = C2 = D= h= H= R= T= K=
REF.
CIRIA Report Report 108 108
Column) , , Concrete Structure Type Wall unitless (1 = Wall, 2 = Column) mh Coefficient dependent Coefficient dependent on on the size and shape and shape of the of the formwork formwork 1.00 Cement type T6 unitless Cement type m Coefficient dependent Coefficient dependent on on the constituent materials constituent materials of concrete of concrete 0.60
25.00 kN/m³ 3.30 m 3.30 m 3.00 m/hr 32.00 ° C 0.56 unitless
Weight Density Weight Density of of Concrete Concrete Vertical Pour Vertical Pour height height Vertical Form Vertical Form height The rate at which at which the concrete rises vertically up vertically up the form the form Concrete temperature at placing placing ( 36/T+16 )², 36/T+16 )², Temperature Coefficient
2.0 CIRIA 108 ‐ Provisions
‐ When C1 P1 = H=
1.73 m 3.30 m
Pd2 =
C1 R incorporates the effects of vibration of vibration and workablity and workablity Vertical Form Vertical Form height
Pressure is, D[C1√R+C2K√(H‐ (C1√R)])
Pd1 = Pd1 =
R > H, the fluid the fluid pressure pressure (Dh) should be should be taken as the design pressure. design pressure.
Calculated Pressure 53.87 kN/m² Calculated Pressure Dh, Pressure 82.50 kN/m²
CONCRETE PRESSURE DIAGRAM
‐ The Design Pressure is the smallest between the two calculated values. 3.5
Design Pressure = 53.86 kN/m²
Hz =
2.15 m
0, 3.30
Height of Height of Hydrostatic Hydrostatic Zone
3
3.0 Values of Coefficients of Coefficients C1, C2: 2.5
Walls: Columns:
C1 C1
1. 0 0 1.50
: section where either the either the width or breadth or breadth > 2.0 m : section where both the width and breadth and breadth < 2.0 m
Concrete ‐ OPC, RHPC or SRPC without admixtures ‐ OPC, RHPC or SRPC without admixtures, except a retarder ‐ OPC, RHPC or SRPC with retarder ‐ LHPBFC, PBFC, PPFAC or blends containing less than 70% ggbfs or 40% pfa without admixtures ‐ LHPBFC, PBFC, PPFAC or blends containing less than 70% ggbfs or 40% pfa with any admixtures, except a retarder ‐ LHPBFC, PBFC, PPFAC or blends containing less than 70% ggbfs or 40% pfa with a retarder ‐ Blends containing more than 70% ggbfs or 40% pfa
J:\NOH2\15. Cris Calculation Files\01. Excel File\Concrete Pressure Analysis
Value of C2 of C2 0.30 0.30 0.45 0.45
P
0.45
3 / H
) h ( T H G I E 2 H R U O P L 1.5 A C I T R E V
53.87, 1.145
1
0.5
0.60 0
0, 0
0
0.60
50
53.87, 0.00
100
CONCRETE PRESSURE (Pd)
By: CGB
