Title:
1???????
?4???????????? (????????) ?3? ??1
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2- ?????????
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3- ?????56???????????????????????????????????
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- ??56?????????
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- ??2?????????
4(1) ??????
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5?????
??(N/mm2) 1000 800 600 400
200 0
780N/mm2?
590N/mm2?
590N/mm2????
SM490
SS400
????
??????????????????
????
0 10 20 30 40 ??()
6- ???????
- ??????????
- ???????????
7???????
???????????????
8??????????
??(N/mm2) 600 400 200 0
SS400
0 10 20 30 40 ??()
9(2) ????????
- ???????????????
- ?????????????????
- ?????????????
- ???????????
- ?????????
10????????(1)
- ????????????
- ??????????????????
11????????(2)
???????? ???? ?????
12- ??????????
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13????????????
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14- ????????
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15???????????
- ???????????????????????(??)??????
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16??????????????????
??????????? ????? ??????????????????????
??(N/mm2) 600 400 200 0
SS400
0 10 20 30 40 ??()
17- ????????????
- ???????????
- ???????????
- ?????????????
- ????????????????
- ???????????????
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18(3)?????????????
?????????3??????????????????????(1)
?? ?? ???? ?? ??? ??????
1 ??? ??????? 0.3G ???????
2 ????????? ??????? 0.2G 0.3G ??????? ??????? ??????? ????????? ?????????
3 ????????? ???????? ???????? 0.2G 1.0G ?????????
???
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(1)??12?????????????????????????(???????)????????
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19???1???
????? ??????????????
- ??? ????????(??3??13m??9m???6m???500? ??)
- ???? ?????????
- ??? 0.3G(???1.5?)
- ????? ???????
20???2???
????? ????????????? ??????????????????
- ??? ????????????????????????(??????????)
- ???? ?????????
- ??? 0.2G????????????????0.3G
- ????? ?????????????????????????(?????)
- ??? ?????????(???????)
21???3???
????? ???????????????
- ??? ????????
- ???? ????????????????
- ??? ??????? 0.2G???????? 1.0G(???????????0.25
0.55????) - ????? ???????? (???????????????)
- ??? ?????????(???????)
22(4)????????SN?
??? YR YP / TS
??(N/mm2) 600 400 200 0
????
SS400
???? TS
????? YP
0 10 20 30 40 ??()
23SS??SN????(2)
????? YP(N/mm2) ???? TS(N/mm2 ??? YR() ??? C() ????(??) ??
SS400 16ltt ?40 235 ? 400 ? ?510 --- --- 21 ? ????????????
SN400A t ?40 235 ? 400 ? ?510 --- ?0.23 21 ? ???????????C???
SN400B 12ltt ?40 235 ? ?355 400 ? ?510 ? 80 ?0.20 22 ? ??? SM400???
SN400C 12ltt ?40 235 ? ?355 400 ? ?510 ? 80 ?0.18 21 ? ????????????
BCR295 12ltt ?22 295 ? ?445 400 ? ?550 ? 90 ?0.20 27 ? (23 ?) ?????? ()? tlt16
BCP235 16ltt ?40 235 ? ?355 400 ? ?510 ? 80 ?0.20 22 ? ??????
24SS400???
????????????????????
??(N/mm2) 600 400 200 0
????????
???????????
0 10 20 30 40 ??()
25SN400B,C , BCP235???
????????
????2????????
??(N/mm2) 600 400 200 0
????80
0 10 20 30 40 ??()
26BCR295???
?????????????????????? (0.2????????)
????1????????
??(N/mm2) 600 400 200 0
????90
0 10 20 30 40 ??()
27???????
- SN400B ?????? BCR295
- ????????
- SN400B??????
- SS400 ?????? STKR400
- ???????? (??355N/mm2)
- ??SS400??????????
- SN400B ?????? BCP235
- ?????????
- SN400B?????
28????????????????
?? 500 (N/mm2)
SN400B
???
?? -4 -2 0 2 4 ()
???
-500
29 30????
- ???? / ??????????? / ?????????
- (?)????? / ?????????(SN?)JIS G3136-1994
- (?)???????? / ?????????????????
- ???? / ???????????? / ?????
31?????????
32???
- ??????????????????????????????????????????
??????????56????????0.2????????????????????0.2??
???????????????????????????? ?????????????????????
????????0.2????????????????????????????
0.2?
????
33??????1?????????????0.2G(?200??)?????????????????
?????????????????????????????????????? 1G 980??
980cm/sec2 ??? ????TV??????????????????????????
?????????????????????????? ??????????????????????1
???????
?200??
- ?????(1923) 330?? M7.9?????(1968)?? 235?? M7.9
??????(1978) 432?? M7.4???????(1995) 818?? M7.2
34- ?????????????????????????????????????
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- ??8????????????????????????????????????????
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- 0.3?????????????????
- ????????
1 2 3
????
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35???????????????? ????????????????????????????????
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36??????????????????????2?????????10????????????????
????????????????0???????7?????????3000???????????
????????????????????????????????? ????7??????????
??????12??????????????????????????????????????????
????????? ???????????????????????????????????????1
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