طرح و محاسبه ی باد بندها
B=1/(1+(λ/2Cc)) Cc=130 λ<123 λ=KL/R ( K=1 )
) بادبند ضربدری Kx=1/2 Ky=2/3)
115 |
110 |
105 |
100 |
95 |
90 |
85 |
80 |
75 |
70 |
65 |
60 |
50 |
40 |
λ |
.69 |
.7 |
.71 |
.72 |
.73 |
.74 |
.75 |
.76 |
.78 |
.79 |
.8 |
.81 |
.84 |
.87 |
B |
.92 |
.94 |
.95 |
.96 |
.97 |
.99 |
1 |
1.02 |
1.03 |
1.05 |
1.07 |
1.08 |
1.12 |
1.16 |
1.33*B |
Ry |
Rx |
Iy |
Ix |
A |
ورق تقویتی |
مقطع |
3.7 |
3.11 |
303 |
213 |
22 |
- |
2UNP8 |
4.33 |
2.7 |
639 |
249 |
34 |
2PL6*1 |
|
4.12 |
3.92 |
458 |
414 |
27 |
- |
2UNP10 |
4.7 |
3.4 |
892 |
450 |
39 |
2PL6*1 |
|
4.9 |
3.4 |
1037 |
499 |
43 |
2PL8*1 |
|
4.58 |
4.64 |
715 |
735 |
34 |
- |
2UNP12 |
5.15 |
4.1 |
1225 |
771 |
46 |
2PL6*1 |
|
5.27 |
4.04 |
1394 |
820 |
50 |
2PL8*1 |
|
5.38 |
4.08 |
1564 |
901 |
54 |
2PL10*1 |
|
4.95 |
5.46 |
1002 |
1217 |
40.8 |
- |
2UNP14 |
5.6 |
4.8 |
1787 |
1302 |
56.8 |
2PL8*1 |
|
5.7 |
4.77 |
1983 |
1384 |
60.8 |
2PL10*1 |
|
5.8 |
4.82 |
2180 |
1505 |
64.8 |
2PL12*1 |
|
|
|
|
|
|
2PL |
|
5.38 |
6.22 |
1396 |
1863 |
48 |
- |
2UNP16 |
6.08 |
5.45 |
2525 |
2030 |
68 |
2PL10*1 |
|
6.17 |
5.46 |
2751 |
2151 |
72 |
2PL12*1 |
|
6.25 |
5.52 |
2977 |
2320 |
76 |
2PL14*1 |
|
|
|
|
|
|
|
|
5.8 |
6.97 |
1894 |
2728 |
56 |
- |
2UNP18 |
6.55 |
6.13 |
3436 |
3016 |
80 |
2PL12*1 |
|
6.62 |
6.15 |
3693 |
3185 |
84 |
2PL14*1 |
|
6.69 |
6.22 |
3950 |
3410 |
88 |
2PL16*1 |
|
6.23 |
7.72 |
2513 |
3858 |
64.4 |
- |
2UNP20 |
7.06 |
6.85 |
4827 |
4536 |
96.4 |
2PL16*1 |
|
7.13 |
6.92 |
5117 |
4826 |
100.4 |
2PL18*1 |
|
|
|
|
|
96 |
- |
4UNP16 |
|
|
|
|
112 |
- |
4UNP18 |