Ihe kacha mma igwe prestressed injinịa ihe nchara nchara
Ụdọ ígwè prestressed bụ eriri nchara nke nwere eriri igwe dị elu nke 2, 3, 7 ma ọ bụ 19, ma nwetala ọgwụgwọ mgbakasị ahụ (ngwọta nkwụsi ike), nke dabara maka kọmpụta prestressed ma ọ bụ ebumnuche yiri ya.
Isi njirimara nke eriri igwe a na-agbanyerịrị bụ ike dị elu, ịrụ ọrụ ezumike dị mma, yana dịtụ ogologo mgbe ekpughere ya. Ogo tensile ike a na-ahụkarị bụ 1860 MPa, yana enwere akara ule dị ka 1720, 1770, 1960, 2000, na 2100 MPa. Ike mkpụrụ nke ígwè a dịkwa oke elu.
A na-eji eriri ígwè dị elu nke carbon carbon na-agbanye n'ime waya ígwè mgbe a gwọchara ya n'elu, mgbe ahụ, a na-atụgharị ọnụ ọgụgụ ụfọdụ nke wires nchara n'ime eriri dị ka usoro eriri ígwè si dị, mgbe ahụ, a na-emepụta ha site na usoro nkwụsịtụ na-ebelata nrụgide. Iji gbasaa ogologo oge, eriri igwe nwere ike ịnwe ígwè ma ọ bụ ihe mkpuchi ma ọ bụ ihe mkpuchi, dị ka galvanizing, epoxy cover, wdg. The kpụrụ prestressed eriri eriri nchara na-enweta a ebu mkpakọ usoro mgbe stranding, Ọdịdị bụ denser na elu oyi akwa dabara adabara anchoring. Iji mee eriri igwe anaghị agba nchara (ụdọ igwe anaghị agba nchara) jiri eriri nchara nkịtị etinyere ya nke ọma, kpuchie ya na griiz mgbochi corrosion ma ọ bụ paraffin, wee kechie ya na polyethylene dị elu (HDPE).
Ngwa igwe
| Dn/mm | Ike ọdụdọ Rm/MPa | Ike kachasị nke strandFm/KN nchara niile | Ezipụta ike ndọtị na-abụghị oke FP0.2/KN | Mgbatị ike kachasị elu (L0≥500 mm) Agt/% | Ịrụ ọrụ izu ike nrụgide | Ụkpụrụ isi | |
| Ibu nke mbụ dabara na pasent kacha elu nke ọnụ ọgụgụ/% | Ọnụego ezumike nrụgide mgbe 1000hr/% | ||||||
| 15.2 | ≥1860 | ≥260 | ≥234 | ≥3.5 | 70 | ≤2.5 | GB/T5224-2014 |
| 80 | ≤4.5 | ||||||
| 15.24 | ≥1860 | ≥260.7 | ≥234.6 | ≥3.5 | 70 | ≤2.5 | ASTMA416-2003 |
Size na ndiiche
| Dn/mm | Ngbanwe nke dayameta/mm nwere ike ime | Ntụtụ aka n'ofe akụkụ sn/mm2 |
| 15.20 | + 0,40 -0.20 | 140 |
| 15.24 | + 0.65 -0.15 | 140 |
Ngosipụta nkọwa
