Post on 26-Nov-2015
description
Steel Materials and Products for Steel Building
Construction
Steel Materials and Products for Steel Building Construction
Developed
Country
Thailand Y = 5,359 X = 200
: downstream
Demand
70%-80%
Crude Prod.
~ 14 60%
Infra
SN Grade
Revise Extreme Event
Steel 33.1%
1996
7
Source:
5
Source:
Bolt
Steel Materials and Products for Steel Building Construction
Billet: Area > 36 in2
Bloom: Area < 36 in2
Source:
CFT = Column Filled Tube
. 1227
2539 JIS G3101
1995 JIS G3106
1995 JIS G3136
1994 BS 4360
1986
BS EN 10025 1986
ASTM 1997
SS400 SS490 SS540
SS400 SS490 SS540
43A 50A
A36
SM400 SM400A SM400B
SN400A SN400B
43B 43C
S275JR A572 Gr.42
SM490 SM490B
SM490 YA SM490 YB
SN490B
50B 50C
S355JR A572 Gr.50
A992
SM520 SM570
SM520B SM570
( )
Source: www.syssteel.com
. 1227-2539
( )
Source: www.syssteel.com
. 1227-2539
( )
. 1228-2549
( )
Material
Grade
Chemical Composition (%) Mechanical Properties
C
Max
Si
Max
Mn
Max
P
Max
S
Max
Yield
Strength
N/mm2.
Tensile
Strength
N/mm2.
Elongation
(%)
t 5 t >5
SSC 40 0.25 - - 0.05 0.05 245 400 - 510 21 17
( )
. 107-2533
Source: www.pacificpipe.co.th
( )
. 276 & 277-2532
( )
. 107-2533
Source: www.pacificpipe.co.th
( )
. 107-2533
Source: www.pacificpipe.co.th
Steel Materials and Products for Steel Building Construction
Steel Materials and Products for Steel Building Construction
( )
.. 2544 .. 2522
( 2) .. 2535
( 3) .. 2543
( 4) .. 2549 .. 2522 48 (.. 2540) 60 (.. 2549)
.. 2552
( )
(1)
(2) 1,000
(3)
( )
23.00
10,000
2,000 15.00 1,000 2,000
( )
* (.)
150 x 150 . 50
300 x 300 . 25
*
200 x 200 . 40
50
( )
1 2
3
( )
1,000 8.00
ISO 834 ASTM E 119
Section Factor
The main factors affecting the behavior of steel structures in fire are: the elevated temperatures in the steel members; the applied loads on the structure; the mechanical properties of the steel; and the geometry and design of the structure.
Structural Steel Sections:
Temperature Calculation Protection Systems
( )
Section Factor: The ratio of the heated perimeter to the area or mass of the cross section The section factor is important because the rate of heat input is directly proportional to the area exposed to fire (S), and the rate of temperature increase is inversely proportional to the heat capacity of the member (cV) The section factor can be expressed as: S/V Heated surface area/Volume per unit length (m-1) Hp/A Heated perimeter/Area (m-1)
( )
( )
Section Factor: b
h Hp/A = 2(b+h) + 2(b t) A t
b
h Hp/A = 2(b+h) A
( )
Section Factor: b
h Hp/A = 2(b+h) A
D
Hp/A = D A
( )
Section Factor:
h Hp/A = 2(b+h) + 2(b t) b A t
b
h Hp/A = 2h + b A
b
( )
Fire Protection Systems:
Concrete encasement expensive, bulky and time-consuming Board systems calcium silicate or gypsum boards Spray-on systems (cement-based) wet & messy installation process, not suitable for decorative finishes Intumescent Paint swells up into a thick charry mass when heated, several coats required to obtain necessary thicknesses, high cost
( )
Fire Protection
Systems for Steel
ASTM E119 Fire Resistance Test
SubunitData
Logger
Computer
0.25 m
0.20 m
1.40 m
0.30 m
Buners
Themocouples
Themocouples
0.90 m0.30 m
( )
0
60
120
180
240
0 50 100 150 200 250 300 350 400
Hp/A (m-1)
FRR (min)
60
120
180 (1/138)
(18/138)
(122/138)
( )
Hp/A (m-1)
FRR (min)
60
120
180
(0/8)
(2/8)
0
60
120
180
240
0 50 100 150 200 250 300 350 400
( )
Hp/A (m-1)
FRR (min)
60
120
180
(0/10)
(7/10)
0
60
120
180
240
0 50 100 150 200 250 300 350 400
( )
0
5
10
15
20
0 20 40 60 80 100 120 140 160 180 200 220 240
0.0
0.2
0.4
0.6
0.8
1.0
0 60 120 180 240
Lower bound
Upper bound
Empirical distribution
Normal distribution
FRR (mins) FRR (mins)
Frequency CDF
P(FRR < 1hr) = 0.148 < 2hr) = 0.848
< 3hr) = 0.999
= 90.2 = 28.9
Thank you for your attention
Steel Materials and Products for Steel Building Construction