(2) An 8-meter-height welded-I-section column, with pinned boundary conditions at each end, is subjected to the axial compression. Q235B steel is used. Two optional sections are shown in the following figure. Flanges are of cutting edges. Calculate design values of the axial compression by considering two optional sections, and compare the results. 201 20 25 HA 500 400 Knowns: The design strength 215N/mm², the yield strength fy=235N/mm². The effective lengths with respect to the two principal axes are identical, 1 = 8m. Class b sections for stability design.
(2) An 8-meter-height welded-I-section column, with pinned boundary conditions at each end, is subjected to the axial compression. Q235B steel is used. Two optional sections are shown in the following figure. Flanges are of cutting edges. Calculate design values of the axial compression by considering two optional sections, and compare the results. 201 20 25 HA 500 400 Knowns: The design strength 215N/mm², the yield strength fy=235N/mm². The effective lengths with respect to the two principal axes are identical, 1 = 8m. Class b sections for stability design.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:(2) An 8-meter-height welded-I-section column, with pinned boundary conditions at
each end, is subjected to the axial compression. Q235B steel is used. Two optional
sections are shown in the following figure. Flanges are of cutting edges.
Calculate design values of the axial compression by considering two optional sections,
and compare the results.
201 500
20
25 400
Knowns: The design strength 215N/mm², the yield strength fy=235N/mm². The
effective lengths with respect to the two principal axes are identical, 1 = 8m. Class b
sections for stability design.
Transcribed Image Text:Integer part
of λ
fy
235
0
88889
20
10 0.992
0.970
30 0.936
40 0.899
50 0.856
828
60 0.807
01
70 0.751
200
Table C-2 Stability factor , of axially loaded compression
members, for Class b sections
80 0.688
90
100
110
120 0.437 0.432
130 0.387 0.383
140 0.345 0.341
150 0.308 0.304
160 0.276
170
180
190
240
250
1.000 1.000 1.000 0.999
0.989 0.987
0.991
0.967 0.963
0.960 0.957
0.925
0.932 0.929
0.895 0.891
0.887
0.847 0.842 0.838 0.833
0.852
0.802 0.797 0.791 0.786 0.780
0.739 0.732 0.726
0.675 0.668 0.661 0.655
0.608 0.601
0.745
0.681
0.720
2 3
0.337
0.301
0.273 0.270 0.267
0.249 0.246
0.225 0.223
0.244 0.241
0.220 0.218
0.200 0.198
0.181
0.204
0.202
0.186 0.184
0.183
210 0.170 0.169 0.167 0.166
220 0.156 0.155 0.154 0.153
230 0.144 0.143 0.142
0.141
0.133 0.132 0.131 0.130
0.123
4
5
0.999
0.998
0.985 0.983
0.953
0.922 0.918
0.882 0.878
0.594
0.529
0.828
0.621 0.614
0.588 0.581
0.555 0.549 0.542 0.536
0.523
0.470 0.464
0.416
0.493 0.487 0.481 0.475
0.426
0.421
0.378 0.374 0.370
0.333
0.329
0.298 0.294
0.997
0.996 0.995 0.994
0.981
0.978 0.976 0.973
0.950 0.946 0.943 0.939
0.914
0.910 0.906
0.903
0.874
0.870 0.865
0.861
0.823 0.818
0.774
0.769 0.763
0.714
0.707 0.701
0.648 0.641 0.635
7
9
0.265
0.239
0.216 0.214
0.197 0.195
0.180 0.178
0.165 0.163 0.162
0.151 0.150 0.149
0.140 0.138
0.129
0.128 0.127
0.813
0.575 0.568
0.561
0.517 0.511
0.505
0.499
0.458
0.453
0.447
0.442
0.411 0.406
0.402
0.397
0.392
0.365 0.361
0.357
0.353
0.349
0.326 0.322
0.318
0.315
0.311
0.291 0.288
0.285 0.282
0.279
0.262 0.259
0.256 0.254
0.251
0.236 0.234
0.232
0.229
0.227
0.210
0.208 0.206
0.212
0.193
0.176 0.175
0.191
0.190 0.188
0.172
0.173
0.160 0.159 0.158
0.757
0.694
0.628
0.148 0.146 0.145
0.137 0.136 0.135 0.134
0.126
0.125
0.124
Decimal part
of λ
fy
235
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