FIRE DESIGN OF STEEL MEMBERS - Civil and Natural Resources ...

More documents

Recommendations

Info

*.str file developed by the pre processor in Figure B.1 for a 180UB16.1 beam exposed to an ISO 834 fire on 4 sides. NMAT 1 ELEMENTS SOLID 27 NG 2 NVOID 0 NODES NODE 1 0 0 NODE 2 0 0.0085 NODE 3 0 0.0171 NODE 4 0 0.0256 NODE 5 0 0.0342 NODE 6 0 0.0427 NODE 7 0 0.0472 NODE 8 0 0.0558 NODE 9 0 0.0643 NODE 10 0 0.0729 NODE 11 0 0.0814 NODE 12 0 0.09 NODE 13 0.007 0 NODE 14 0.007 0.0085 NODE 15 0.007 0.0171 NODE 16 0.007 0.0256 NODE 17 0.007 0.0342 NODE 18 0.007 0.0427 NODE 19 0.007 0.0472 NODE 20 0.007 0.0558 NODE 21 0.007 0.0643 NODE 22 0.007 0.0729 NODE 23 0.007 0.0814 NODE 24 0.007 0.09 NODE 25 0.0388 0.0427 NODE 26 0.0388 0.0472 NODE 27 0.0706 0.0427 NODE 28 0.0706 0.0472 NODE 29 0.1024 0.0427 NODE 30 0.1024 0.0472 NODE 31 0.1342 0.0427 NODE 32 0.1342 0.0472 NODE 33 0.166 0 NODE 34 0.166 0.0085 NODE 35 0.166 0.0171 NODE 36 0.166 0.0256 NODE 37 0.166 0.0342 NODE 38 0.166 0.0427 NODE 39 0.166 0.0472 NODE 40 0.166 0.0558 NODE 41 0.166 0.0643 NODE 42 0.166 0.0729 NODE 43 0.166 0.0814 NODE 44 0.166 0.09 NODE 45 0.173 0 NODE 46 0.173 0.0085 NODE 47 0.173 0.0171 NODE 48 0.173 0.0256 NODE 49 0.173 0.0342 157
NODE 50 0.173 0.0427 NODE 51 0.173 0.0472 NODE 52 0.173 0.0558 NODE 53 0.173 0.0643 NODE 54 0.173 0.0729 NODE 55 0.173 0.0814 NODE 56 0.173 0.09 NODELINE 0.0 0.0 YC ZC 0.0 0.0 FIXATIONS NOD<strong>OF</strong>SOLID ELEM 1 1 2 14 13 1 ELEM 2 2 3 15 14 1 ELEM 3 3 4 16 15 1 ELEM 4 4 5 17 16 1 ELEM 5 5 6 18 17 1 ELEM 6 6 7 19 18 1 ELEM 7 7 8 20 19 1 ELEM 8 8 9 21 20 1 ELEM 9 9 10 22 21 1 ELEM 10 10 11 23 22 1 ELEM 11 11 12 24 23 1 ELEM 12 18 19 26 25 1 ELEM 13 25 26 28 27 1 ELEM 14 27 28 30 29 1 ELEM 15 29 30 32 31 1 ELEM 16 31 32 39 38 1 ELEM 17 33 34 46 45 1 ELEM 18 34 35 47 46 1 ELEM 19 35 36 48 47 1 ELEM 20 36 37 49 48 1 ELEM 21 37 38 50 49 1 ELEM 22 38 39 51 50 1 ELEM 23 39 40 52 51 1 ELEM 24 40 41 53 52 1 ELEM 25 41 42 54 53 1 ELEM 26 42 43 55 54 1 ELEM 27 43 44 56 55 1 FRONTIER 1 FISO FISO FISO 2 FISO FISO 3 FISO FISO 4 FISO FISO 5 FISO FISO 6 FISO 7 FISO FISO 8 FISO FISO 9 FISO FISO 10 FISO FISO 11 FISO FISO FISO 12 FISO FISO 13 FISO FISO 14 FISO FISO 15 FISO FISO 16 FISO FISO 17 FISO FISO FISO 18 FISO FISO 19 FISO FISO 20 FISO FISO 21 FISO FISO 158
Page 1 and 2:
Fire Design of Steel Members K R Le
Page 4:
ABSTRACT: The New Zealand Steel Cod
Page 8 and 9:
TABLE OF CONTENTS: ABSTRACT:.......
Page 10 and 11:
5.4 RESULTS FOR FOUR SIDED EXPOSURE
Page 12 and 13:
LIST OF FIGURES: FIGURE 1.1: VARIAT
Page 14:
FIGURE 5.11: TEMPERATURE CONTOUR LI
Page 17 and 18:
designed with confidence. Full scal
Page 19 and 20:
eams and struts when subjected to a
Page 21 and 22:
Gilvery and Dexter, (1997), prepare
Page 23 and 24:
with conditions specified to ensure
Page 25 and 26:
1.6 BACKGROUND INFORMATION: 1.6.1 F
Page 27 and 28:
experienced in fire situations, but
Page 29 and 30:
The thermal conductivity is not imp
Page 31 and 32:
[ The heated perimeter of the steel
Page 33 and 34:
The advantages of board systems are
Page 35 and 36:
The values for the thermal properti
Page 37 and 38:
insulation has on the rise of the s
Page 39 and 40:
( T − T ) k H p f s ∆t ∆T
Page 41 and 42:
spreadsheet method very closely, wi
Page 43 and 44:
protection, and for user defined fi
Page 45 and 46:
This equation originates from the y
Page 47 and 48:
1400 1200 1000 800 600 400 200 0 0.
Page 49 and 50:
time. The value of the wall lining
Page 51 and 52:
The Eurocode does not define a meth
Page 53 and 54:
f f y y ( T ) (20) = 1.0 0 < T < 21
Page 55 and 56:
temperature is chosen because it is
Page 57 and 58:
The variation of yield stress data
Page 59 and 60:
15 m -1 < H p /A < 275 m -1 in NZS
Page 61 and 62:
= H p A (m -1 ) 7.85 The cons
Page 63 and 64:
Connections: NZS 3404 requires that
Page 66 and 67:
4 CALCULATION OF STEEL TEMPERATURES
Page 68 and 69:
4.1.2 Analysis Between Methods of T
Page 70 and 71:
Figure 4.2 shows the variation of t
Page 72 and 73:
Minimum temperatures Maximum temper
Page 74 and 75:
For all three sizes of beam, the sp
Page 76 and 77:
Temperature ( o C) 1200 1000 800 60
Page 78 and 79:
The ECCS equation has a time period
Page 80 and 81:
4.3.1 Results from simulations with
Page 82 and 83:
From Figure 4.5 a-c, the formula ra
Page 84 and 85:
Temperature ( o C) 1000 800 600 400
Page 86 and 87:
average temperature of the beam, be
Page 88 and 89:
Temperature ( o C) 1400 1200 1000 8
Page 90 and 91:
significantly decreased from a cool
Page 92 and 93:
Since both programmes use the same
Page 94 and 95:
Therefore, the ECCS equations provi
Page 96 and 97:
5 CALCULATION OF STEEL TEMPERATURES
Page 98 and 99:
calculations made by the spreadshee
Page 100 and 101:
susceptible to heating, heat up mor
Page 102 and 103:
Figure 5.3 a-c show the results fro
Page 104 and 105:
7850*600*10500 > 2*775*1100*(1869*2
Page 106 and 107:
As can be seen from Figure 5.4 a-c,
Page 108 and 109:
310 UB 40.4 beam H p /A = 241 m -1
Page 110 and 111:
The SAFIR results fit between the t
Page 112 and 113:
constant specific heat being used i
Page 114 and 115:
From Figure 5.7 a-c, it appears tha
Page 116 and 117:
800 Temperature ( o C) 600 400 200
Page 118 and 119:
To examine the limits of the thickn
Page 120 and 121:
1000 Temperature ( o C) 800 600 400
Page 122 and 123: Thermal conductivity, k i = 0.19 W/
Page 124 and 125: 1000 Temperature ( o C) 800 600 400
Page 126 and 127: the slab except to reduce the secti
Page 128 and 129: Figure 5.14 shows the correlation b
Page 130 and 131: 5.8 CONCLUSIONS: The thermal behavi
Page 132 and 133: 6 COMPARISON OF METHODS USING OTHER
Page 134 and 135: Temperature ( o C) 1200 1000 800 60
Page 136 and 137: 6.2.4 Results for protected steel:
Page 138 and 139: Figures 6.2 b shows the comparison
Page 140 and 141: Figure 6.3 a shows that the average
Page 142 and 143: The fire that the test beams were e
Page 144 and 145: 7 ADDITIONAL MATERIAL IN EUROCODE 3
Page 146 and 147: For thermal analysis in Eurocode 3,
Page 148 and 149: To determine the performance of a s
Page 150 and 151: The plastic neutral axis is located
Page 152 and 153: It is therefore recommended that th
Page 154 and 155: These methods may be used to provid
Page 156: Eurocode has a large annex with gui
Page 159 and 160: 8.3 CHANGES TO NZS 3404: The follow
Page 161 and 162: H v height of the ventilation (m) I
Page 163 and 164: EC3, 1995. Eurocode 3: Design of St
Page 165 and 166: Temperature Conditions. National Re
Page 168 and 169: APPENDIX A - SPREADSHEET METHOD: Be
Page 170 and 171: APPENDIX B - SAFIR: In Figure B.2 i
Page 174 and 175: 22 FISO 23 FISO FISO 24 FISO FISO 2
Page 176: APPENDIX C - FIRECALC Below in Figu
show all

FIRE DESIGN OF STEEL MEMBERS - Civil and Natural Resources ...

Create successful ePaper yourself

Delete template?

Save as template?