reversal of concrete pressure calc.
hi I'm trying to reverse a pressure calc for concrete.
I can calculate the pressure easily and have set up an excel document to do this.
I would know like to use all the same variables except I know the pressure, and know want to know the rise rate.
basically allowing me to change the temp co efficient and get an output of different rise rates.
formuale is
[TABLE="width: 662"]
[TR]
[TD="class: xl76, bgcolor: #E2EFDA, colspan: 4, align: center"]P = D[C1√R+C2K√(H- (C1√R)])
[/TD]
[/TR]
[/TABLE]
so want to make R the value to be found.
[TABLE="width: 662"]
[TR]
[TD="class: xl65, width: 71"] [/TD]
[TD="class: xl75, width: 502, colspan: 7, align: center"]Walls = where width or breadth > 2.0m, Columns were Width and Breadth <2.0m[/TD]
[TD="width: 89"][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]C_Struc = [/TD]
[TD="class: xl68, bgcolor: yellow, align: center"]Column[/TD]
[TD]Unitless[/TD]
[TD="class: xl73, colspan: 6"](Wall = 1, Column = 1.5) , Concrete Stucture Type[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]C1 = [/TD]
[TD="class: xl67, align: center"]1.5[/TD]
[TD="width: 73"][TABLE]
[TR]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD="width: 37"][/TD]
[/TR]
[TR]
[TD][/TD]
[/TR]
[/TABLE]
[/TD]
[TD="class: xl73, colspan: 6"]Coeffcient dependant on size & shape of formwork[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]C_Type= [/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]Retarded[/TD]
[TD]unitless[/TD]
[TD="class: xl73, colspan: 6"](Normal = 0.3, Retarded = 0.45, Heavily Retarded=0.6) Cement Type[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]C2 = [/TD]
[TD="class: xl67, align: center"]0.45[/TD]
[TD="width: 73"][TABLE]
[TR]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD="width: 43"][/TD]
[/TR]
[TR]
[TD][/TD]
[/TR]
[/TABLE]
[/TD]
[TD="class: xl73, colspan: 6"]Coefficent dependant on the constituent of Concrete[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"] [/TD]
[TD][/TD]
[TD][/TD]
[TD="class: xl73"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]D[/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]25[/TD]
[TD]kN/m³[/TD]
[TD="class: xl73, colspan: 4"]Weight Density of Concrete[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]h[/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]9.05[/TD]
[TD]m[/TD]
[TD="class: xl73, colspan: 3"]Vertical Pour Height[/TD]
[TD="class: xl70"][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]H[/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]9.05[/TD]
[TD]m[/TD]
[TD="class: xl73, colspan: 3"]Vertical Form Height[/TD]
[TD="class: xl70"][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]R[/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]1[/TD]
[TD]m/hr[/TD]
[TD="class: xl73, colspan: 6"]rate at which the concrete rises vertically up the form[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]T[/TD]
[TD="class: xl69, bgcolor: yellow, align: center"]12.5[/TD]
[TD]°C[/TD]
[TD="class: xl73, colspan: 5"]Concrete Temperature ( Not Ambient Temp)[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]K[/TD]
[TD="class: xl74, align: center"]1.60[/TD]
[TD]Unitless[/TD]
[TD="class: xl73, colspan: 4"](36/T+16)², Temp Coeffcient[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl63"] [/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl71, colspan: 3"]Cira 108 Provisions[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: left"][TABLE]
[TR]
[TD="class: xl72"]-When C1 R > H, the fluid pressure (Dh) Should be taken as the design pressure[/TD]
[/TR]
[/TABLE]
[/TD]
[TD][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD="class: xl70"][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl63"] [/TD]
[TD][/TD]
[TD][/TD]
[TD="width: 358, colspan: 5"][TABLE]
[TR]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD="width: 13"][/TD]
[/TR]
[TR]
[TD][/TD]
[/TR]
[/TABLE]
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]P1 = [/TD]
[TD="class: xl67, align: center"]1.5[/TD]
[TD]m[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]H = [/TD]
[TD="class: xl67, align: center"]9.05[/TD]
[TD]m[/TD]
[TD="class: xl73, colspan: 3"]Vertical Form Height[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl63"] [/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]Pd1 = [/TD]
[TD="class: xl76, bgcolor: #E2EFDA, colspan: 4, align: center"]Pressure is, D[C1√R+C2K√(H- (C1√R)])[/TD]
[TD][/TD]
[TD="class: xl79, bgcolor: #E2EFDA, colspan: 3, align: center"]Design Pressure = 86.82 kN/m²[/TD]
[/TR]
[TR]
[TD="class: xl63"] [/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]Pd1 =[/TD]
[TD="class: xl74, align: center"]86.82[/TD]
[TD]kN/m²[/TD]
[TD="class: xl73, colspan: 3"]Calculated Pressure[/TD]
[TD="class: xl82, width: 266, colspan: 3, align: center"] - The Design Pressure is the smallest between the two calculated values[/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]Pd2 = [/TD]
[TD="class: xl67, align: center"]226.25[/TD]
[TD]kN/m²[/TD]
[TD="class: xl73, colspan: 2"]Dh, Pressure[/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: xl64, align: right"]Hz= [/TD]
[TD="class: xl66, align: right"]3.47[/TD]
[TD]m[/TD]
[TD="class: xl73, colspan: 4"]Height of Hydrostatic Zone[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[/TABLE]