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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3683/CH5/EX5.8/Ex5_8.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3683/CH5/EX5.8/Ex5_8.sce')
| -rw-r--r-- | 3683/CH5/EX5.8/Ex5_8.sce | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/3683/CH5/EX5.8/Ex5_8.sce b/3683/CH5/EX5.8/Ex5_8.sce new file mode 100644 index 000000000..36fecaed6 --- /dev/null +++ b/3683/CH5/EX5.8/Ex5_8.sce @@ -0,0 +1,42 @@ +P=850//in kN
+sigma_cc=4//in MPa
+m=18.66//modular ratio
+sigma_sc=130//in MPa
+Lef=5*1.001//effective length, in m
+//assume 1% steel
+Ag=P*10^3/(sigma_cc*0.99+sigma_sc*0.01)//in sq mm
+l=sqrt(Ag)//in mm
+l=400//approximately, in mm
+a=Lef*1000/l
+//as a>12, it is a long column
+//Method I-section to be changed
+b=Lef*1000/12//in mm
+b=420//approximately, in mm
+Ag=b^2//in sq mm
+Asc=(P*1000-sigma_cc*Ag)/(sigma_sc-sigma_cc)//in sq mm
+minimum_steel=0.8/100*b^2//in sq mm
+//as Asc < minimum steel
+Asc=minimum_steel//in sq mm
+//assume 20 mm dia bars
+n=Asc/(%pi/4*20^2)//no. of bars
+n=5//round-off
+//design of links
+dia=1/4*20//in mm
+//as dia < 6 mm, provide 6 mm diameter links
+dia=6//in mm
+spacing=min(b,16*20,48*dia,300)//in mm
+mprintf("Method I\nColumn size %d x %d mm\nMain steel =%d-20 mm dia bars\nLinks=6 mm dia links @ %d mm c/c\n", b,b,n,spacing)
+//Method II-same section
+b=400//in mm
+Ag=b^2//in sq mm
+Cr=1.25-Lef*1000/(48*b)//reduction coefficient
+sigma_cc=Cr*sigma_cc//in MPa
+sigma_sc=Cr*sigma_sc//in MPa
+Asc=(P*1000-sigma_cc*Ag)/(sigma_sc-sigma_cc)//in MPa
+n=round(Asc/(%pi/4*20^2))//no. of bars
+//design of links
+dia=1/4*20//in mm
+//as dia < 6 mm, provide 6 mm diameter links
+dia=6//in mm
+spacing=min(b,16*20,48*dia,300)//in mm
+mprintf("Method II\nColumn size %d x %d mm\nMain steel =%d-20 mm dia bars\nLinks=6 mm dia links @ %d mm c/c", b,b,n,spacing)
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