Qhov zoo tshaj plaws Steel Prestressed Engineering Prestressed Concrete Steel Strand
Prestressed steel strand yog ib txoj hlua khi steel uas muaj 2, 3, 7 lossis 19 high-strength steel hlau, thiab tau dhau los ntawm kev kho kev ntxhov siab (kev kho kom ruaj khov), haum rau cov pob zeb prestressed lossis zoo sib xws.
Cov yam ntxwv tseem ceeb ntawm prestressed steel strands yog siab zog, zoo so kev ua tau zoo, thiab kuj ncaj thaum unfolded. Lub zog tensile qib yog 1860 MPa, thiab muaj cov qib zog xws li 1720, 1770, 1960, 2000, thiab 2100 MPa. Lub zog tawm los ntawm cov hlau no kuj siab heev.
Lub high-carbon steel hlau qws yog txias-dhau mus rau hauv steel hlau tom qab kev kho mob saum npoo, thiab tom qab ntawd ib co xov hlau hlau yog twisted rau hauv cov hlua raws li cov qauv hlau, thiab tom qab ntawd lawv tau tsim los ntawm cov txheej txheem kev ntxhov siab. Txhawm rau kom ntev lub neej ntev, cov hlau xaim hlau tuaj yeem muaj hlau lossis cov hlau tsis yog hlau plating lossis txheej txheej, xws li galvanizing, epoxy txheej, thiab lwm yam. Txhawm rau ua kom muaj zog ntawm daim ntawv cog lus nrog cov pob zeb, qhov saum npoo yuav muaj nicks thiab lwm yam. Cov molded prestressed steel strand undergoes pwm compression txheej txheem tom qab stranding, cov qauv yog denser thiab txheej txheej yog tsim nyog rau anchoring. Txhawm rau ua kom tsis muaj cov hlau tsis sib txuas (tsis muaj cov hlau tsis sib txuas) siv cov txheej txheem ua ntej kev ntxhov siab, coated nrog cov roj los tiv thaiv corrosion lossis paraffin wax, thiab tom qab ntawd qhwv nrog high-density polyethylene (HDPE).
Mechanical zog
| Dn / hli | Tensile zog Rm/MPa | Lub zog siab tshaj plaws ntawm tag nrho cov hlau strandFm / KN | Specified non-proportional extension quab yuam FP0.2 / KN | Maximum quab yuam tag nrho txuas ntxiv (L0 ≥ 500 hli) Agt /% | Kev ntxhov siab so kev ua haujlwm | Tus txheej txheem tswj hwm | |
| Thawj qhov load yog sib npaug rau qhov siab tshaj plaws ntawm qhov nominal /% | Kev ntxhov siab tom qab 1000hr /% | ||||||
| 15.2 | ≥1860 | ≥260 | ≥234 | ≥3.5 | 70 | ≤ 2.5 | GB/T5224-2014 |
| 80 | ≤4.5 | ||||||
| 15.24 Nws | ≥1860 | ≥260.7 | ≥234.6 | ≥3.5 | 70 | ≤ 2.5 | ASTMA 416-2003 UAS |
Loj thiab sib txawv
| Dn / hli | Tso cai sib txawv ntawm txoj kab uas hla / hli | Siv qhov chaw hla ntu sn/mm2 |
| 15.20 Nws | +0.40 -0.20 | 140 |
| 15.24 Nws | +0.65 -0.15 | 140 |
Paub meej Display
