Composite_Steel_With_Infilled_Concrete_Chs-conc_NS_4I20.xls

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P
1	Beca Carter Hollings & Ferner Ltd				A		Design of Reinforced Concrete Filled Steel Hollow Sections
2	JOB NAME:	AUT Arts					Job No:	1306367
3	SUBJECT:	Column Design (column D5)					Page No:
4	BY:	NS					Date:	1/8/2026
5
6
7	Design Moment		152	kNm
8	Design Axial Load (+ve for Compression)		4865	kN
9
10	Casing OD		600	mm
11	Casing Thickness		6.4	mm
12	Casing Area		11935	mm²					Casing OD	600
13	Casing Fy		350	MPa					Casing ID	587.2
14
15	Reinforcing Size		0	mm					Reinforcing OD	587.2
16	Number of Bars		0						Reinforcing ID	587
17	Area of Reinforcing		0	mm²
18	Reinforcing Fy		0	MPa					Outer Concrete OD	587.2		Area	270808.3027
19									Outer Concrete ID	587.2	200
20	Cover to Reinforcing Steel		0	mm
21	(inside of casing to outside of Bar								Inner Concrete OD	587			270808.3027
22
23	Area of Outer Conc Ring		0	mm²
24	Area of Inner Conc Ring		270895	mm²
25	Concrete Strength (f'c)		40	MPa
26	Cube Strength of Concrete (f'c/0.875)		46	MPa
27	Column length		4	m
28	End Moment Ratio (choose -1, 0 or 1) b		0
29					Neutral Axis Depth from Centroidal Axis (h)
30						-152.96
31
32
33		Area	mm²	gm	Force (kN)		y	Force.y
34	Steel Casing Compression As		8024	1.1	2556		40.26	102889						Ac =	270808.30	mm2
35	Steel Casing Tension Ast		3911	1.1	1246		-82.61	-102889						Ic =	5835983916	mm4
36	Reinforcing in Compression Arc		0	1.1	0		0.00	0						Is =	525741207	mm4
37	Reinforcing in Tension Arc		0	1.1	0		0.00	0						Ec =	27898	Mpa
38	Conc. Outer Ring in Comp. Ac1c		0	1	0		0.00	0						Es.Is	105148241404587
39	Conc Core in Compression Ac2c		220976	1	4041		10.71	43267						Ec.Ic	162809499410369
40
42			Sum of Tension Forces (kN)			1246								y = -0.1143x5 + 0.5979x4 - 0.8907x3 + 0.1566x2 - 0.0957x + 1.0167
43			Sum of Compression Forces (kN)			6597								0.9926744798
44					Diff	486
45
46	Moment Capacity Mu		249	kNm
47	Squash Load Nu		9331	kN
48	Tension Capacity		3801	kN
49
50	Effective length, lE		16.84	m
51	Column Slenderness, l		0.24
52	Overall buckling cooeficient K1		0.99
53	Concrete contribution factor a.c		0.60
54	Bending coefficient kb1		0.384
55	Bending coefficient kb2		0.089
56
57	Buckling Capacity Na		9263	kN
58	Axial buckling Resistance Nc		6786	kNm
59	(due to combined axial & bending)
60
61	Axial Capacity N		6786	kN
62	(minimum of Nu, Na, Nc)
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101