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Diffstat (limited to '3863/CH10/EX10.19/Ex10_19.sce')
| -rw-r--r-- | 3863/CH10/EX10.19/Ex10_19.sce | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/3863/CH10/EX10.19/Ex10_19.sce b/3863/CH10/EX10.19/Ex10_19.sce new file mode 100644 index 000000000..2c4b532e3 --- /dev/null +++ b/3863/CH10/EX10.19/Ex10_19.sce @@ -0,0 +1,31 @@ +clear +// +// +//Given +//Variable declaration +h=20 //height in m +D=4 //External diameter in m +d=2 //Internal diameter in m +p=1 //Horizontal wind pressure in kN/sq.m +w=22 //specific weight in kN/m^3 +K=2/3 //Co-efficient of wind resistance + +//Calculation +A1=(%pi/4)*(D**2-d**2) //Area of cross-section +W=w*A1*h //Weigth of the chimney in kN +sigma0=W/A1 //Direct stress in kN/sq.mm +A2=D*h //Projected area of the surface exposed to wind in sq.m +F=K*p*A2 //Wind Force in kN +M=F*h/2 //Bending moment in kNm +I=(%pi/64)*(D**4-d**4) //Moment of inertia +y=D/2 //Distance between C.G. of the base section and extreme edge of the base +Z=I/y //Section modulus +sigmab=M/Z //Bending stress +sigma_max=(sigma0+sigmab) //Maximum stress in kN/sq.m + +sigma_min=(sigma0-sigmab) //Minimum stress in kN/sq.m + + +//Result +printf("\n Maximum stress = %0.3f kN/m^2",sigma_max) +printf("\n Minimum stress = %0.3f kN/m^2",sigma_min) |