Civil Engineering Reference
In-Depth Information
Table 4-7 Properties of Critical Transfer Section-Interior Column
c
2
Concrete area of critical section:
A
c
= 2(b
1
+ b
2
)d
Modulus of critical section:
c
=
c'
= [b
1
d(b
1
+ 3b
2
) + d
3
]/3
where:
γ
v
M
c = c' = b
1
/2
b
2
= c
2
+2
d
/
2
h = 5 in.,
d = 3
3
/
4
in.
h = 5
1
/
2
in.,
d = 4
1
/
4
in.
h = 6 in.,
d = 4
3
/
4
in.
h = 6
1
/
2
in.,
d = 5
1
/
4
in.
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
COL.
SIZE
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
10x10 206.3
963
6.88
242.3
1176
7.13
280.3
1414
7.38
320.3
1676
7.63
12x12 236.3
1258
7.88
276.3
1522
8.13
318.3
1813
8.38
362.3
2131
8.63
14x14 266.3
1593
8.88
310.3
1913
9.13
356.3
2262
9.38
404.3
2642
9.63
16x16 296.3
1968
9.88
344.3
2349
10.13
394.3
2763
10.38
446.3
3209
10.63
18x18 326.3
2383
10.88
378.3
2831
11.13
432.3
3314
11.38
488.3
3832
11.63
20x20 356.3
2838
11.88
412.3
3358
12.13
470.3
3915
12.38
530.3
4511
12.63
22x22 386.3
3333
12.88
446.3
3930
13.13
508.3
4568
13.38
572.3
5246
13.63
24x24 416.3
3868
13.88
480.3
4548
14.13
546.3
5271
14.38
614.3
6037
14.63
h = 7 in.,
d = 5
3
/
4
in.
h = 7
1
/
2
in.,
d = 6
1
/
4
in.
h = 8 in.,
d = 6
3
/
4
in.
h = 8
1
/
2
in.,
d = 7
1
/
4
in.
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
J/c =
J/c'
in.
3
COL.
SIZE
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
A
c
in.
2
c = c'
in.
10x10 362.3
1965
7.88
406.3
2282
8.13
452.3
2628
8.38
500.3
3003
8.63
12x12 408.3
2479
8.88
456.3
2857
9.13
506.3
3267
9.38
558.3
3709
9.63
14x14 454.3
3054
9.88
506.3
3499
10.13
560.3
3978
10.38
616.3
4492
10.63
16x16 500.3
3690
10.88
556.3
4207
11.13
614.3
4761
11.38
674.3
5352
11.63
18x18 546.3
4388
11.88
606.3
4982
12.13
668.3
5616
12.38
732.3
6290
12.63
20x20 592.3
5147
12.88
656.3
5824
13.13
722.3
6543
13.38
790.3
7305
13.63
22x22 638.3
5967
13.88
706.3
6732
14.13
776.3
7542
14.38
848.3
8397
14.63
24x24 684.3
6849
14.88
756.3
7707
15.13
830.3
8613
15.38
906.3
9567
15.63
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