initial commit / add all books

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+sigma_cbc=7//in MPa

+sigma_ct=1.2//in MPa

+sigma_st=170//in MPa

+m=13.33//modular ratio

+V=400000//capacity, in L

+V=V/10^3//in cu m

+h=3//assumed depth of water in tank, in m

+A=V/h//area of tank, in sq m

+B=sqrt(4/%pi*A)//diameter, in m

+B=13//assume, in m

+H=h+0.5//including freeboard, in m

+w=10//unit weight of water, in kN/cu m

+T=w*H*B/2//hoop tension, in kN

+Ast=T*10^3/sigma_st//in sq mm

+s1=10^3*0.785*12^2/Ast//in mm

+s1=80//assume, in mm

+t=(T*10^3/sigma_ct-(m-1)*Ast)/1000//in mm

+t=175//assume, in mm

+//steel at 2 m below top of wall

+h=2//in m

+T=w*h*B/2//in kN

+Ast=T*10^3/sigma_st//in sq mm

+s2=10^3*0.785*12^2/Ast//in mm

+s2=145//assume, in mm

+Ads=0.3/100*t*10^3//vertical steel as distribution steel, in sq mm

+s3=1000*0.785*10^2/Ads//in mm

+s3=150//assume, in mm

+//design of tank floor

+D=190//in mm

+Ast=0.3/100*D*1000//in sq mm

+s4=1000*0.785*10^2/Ast//in mm

+s4=135//assume, in mm

+mprintf("Summary of design\nDiameter of tank=%d m\nDepth of tank=%f m\nTank wall thickness=%d mm\nSteel-hoop steel; 4 m to 2 m below top=12 mm dia @ %d mm c/c\n2 m to 0 m below top=12 mm dia @ %d mm c/c\nvertical steel=10 mm dia @ %d mm c/c\nTank floor: Thickness %d mm\nSteel=10 mm dia @ %d mm c/c both ways",B,H,t,s1,s2,s3,D,s4)