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?????????2017/9/15

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Q345qD?????????????????? 10??2000??8000+ 70?? 10??2000??8000+ 76?? 10??2000??8000+ 70?? 4??1500??8000+ 21?? 10??2000??8000+ 70?? 4??1500??800035?? 4??1500??8000+ 80?? 8??1800??8000+ 70?? 6??1800??8000+ 80?? Q345qD?????????????????? ????????????????19?????1870??????????0.64??0.9%???????0.54??0.68%?????????

Q345qD??????????????????
10??2000??8000+ 70??
10??2000??8000+ 76??
10??2000??8000+ 70??
4??1500??8000+ 21??
10??2000??8000+ 70??
4??1500??800035??
4??1500??8000+ 80??
8??1800??8000+ 70??
6??1800??8000+ 80??

Q345qD??????????????????
????????????????19?????1870??????????0.64??0.9%???????0.54??0.68%?????????685Mpa?????????410Mpa????α?????????????????????158.5m??????????????????????????????????????????????????????е?????????????????????1????????????????????????????????????????????????????????????????Σ???20????20????????20??60?????60?????????????ι???????????????????Σ??????ο??????????????????Ρ?