1??23?????20*1800*8m??201???·???????????в???????
??????????????????????12??2000??8000 32??<BR>14??2000??8000 65??<BR>14??2000??8000 35??<BR>16??2000??8000 42??<BR>16??2000??8000 32??<br><br>???????????????????????????????????????????????<BR>1?????????????1.95??105MPa???????????????????????????????<BR>??1.96 19.3 19.1??/3=1.93??105MPa?? <BR>2?????????????????μ??????á?
??????????????????????
12??2000??8000 32??
14??2000??8000 65??
14??2000??8000 35??
16??2000??8000 42??
16??2000??8000 32??
??????????????????????
?????????????????????????
1?????????????1.95??105MPa???????????????????????????????
??1.96 19.3 19.1??/3=1.93??105MPa??
2?????????????????μ???????????????
??L=P*L*(1-e-(kx ???))/(kL ???)/Ay/Eg
???????????????????????
?????????????????????????????????????????????????????????????????????????????????????????????????????????????????10?????25???/??????????3???/????????????????????4-5??????????????????????????????Щ????????????????????????????????????????????????????????????????????????????????????????????????????????????β??????????????????????????????????????????Щ????????????????????????????????????????????????
1??23?????20*1800*8m??q345qc????????????????????в???????
