Amakuru - Imirasire ya H-grade y'ubwubatsi: Ikintu cy'ingenzi gitera imbaraga iterambere ry'inganda nziza

icyuma gikozwe mu byuma bya galvanised h cyakozwe mu bahanga mu Bushinwa

Mu minsi ishize, bitewe n’iterambere rikomeje mu iterambere ry’imijyi no kwihutisha imishinga y’ingenzi y’ibikorwa remezo, icyifuzo cy’ibyuma by’ubwubatsi bigezweho cyariyongereye. Muri byo harimo:Umurabyo wa H, nk'igice cy'ingenzi gitwara imizigo mu mishinga y'ubwubatsi, yabaye ingenzi mu guteza imbere iterambere ry'inganda z'ubwubatsi, hamwe n'imiterere yabwo myiza ya mekanike n'uburyo bwo kuyikoresha mu buryo bwagutse biganisha ku ihinduka rishya ku isoko.

Mu mushinga munini w’amazu maremare yo mu Burasirazuba bw’Ubushinwa, itsinda ryaHEB 150 Imirasire ya HInjeniyeri mukuru w’umushinga yavuze ko iyi porogaramu iherutse gushyirwa mu nyubako nyamukuru. Nk’icyitegererezo gisanzwe cy’i Burayi cya H-beam, HEB 150 ikundwa n’amashami y’ubwubatsi kubera igishushanyo mbonera cyayo cy’ibice, ubushobozi bwayo bwo kunama buhamye no gutwara imizigo buhamye. Yagize ati: “Ugereranyije n’ibice bisanzwe by’icyuma, HEB 150 ishobora kugabanya umubare w’aho ihurira ho 30% mu gihe cy’ubwubatsi, ikagabanya cyane igihe cyo kubaka mu gihe igenzura umutekano w’inyubako.” Iyi porogaramu ntiremeza gusa agaciro k’ibicuruzwa bisanzwe bya H-beam mu bwubatsi bw’amazu, ahubwo inatanga icyerekezo cyo guteza imbere inyubako z’ibyuma zisanzwe mu nganda.

Nubwo moderi zisanzwe zikoreshwa cyane,ibicuruzwa bya H-beam bikora neza cyaneihagarariwe naImirasire ya ASTM A572-50 HNanone zirimo kwihutisha kwinjira mu mishinga y'ingenzi. Birumvikana ko imirasire ya ASTM A572-50 H ifite ubushyuhe buke kandi irwanya ingese, kandi imbaraga zayo zishobora kugera kuri 345MPa, ibi bikaba bikwiriye cyane cyane mu mirimo minini, ibiraro byo ku muhanda n'indi mishinga ifite ibisabwa byinshi mu miterere. Kuri ubu, mu kubaka ikiraro cyambukiranya imigezi mu majyepfo y'Ubushinwa, imirasire ya ASTM A572-50 H yakoreshejwe mu nyubako nyamukuru y'inkingi, ikemura neza ikibazo cy'umuvuduko w'amazi mu bihe bigoye kandi igenzura ubuzima bw'ikiraro.

Byongeye kandi,Imitako y'urukiramende rwagutse ya ASTM A572-50, nk'umusaruro ukomoka kuri H-beam, byarushijeho kwagura uburyo H-beam ikoreshwa mu nganda z'ubwubatsi. Kubera ubugari bwa flange bwagutse, ubu bwoko bw'umuraba bushobora gukwirakwiza neza umutwaro no kunoza imiterere y'inyubako. Bwakoreshejwe cyane mu kubaka inyubako nini z'ubucuruzi n'inganda mu myaka yashize. Umuntu ushinzwe ikigo gikora ibyuma yagize ati: "Mu gice cya mbere cy'uyu mwaka, ingano y'imitako ya ASTM A572-50 ya flange yiyongereyeho 40% uko umwaka ugenda uhita, kandi ibicuruzwa byoherejwe mu masoko yo muri Aziya y'Amajyepfo y'uburasirazuba, biba ahantu hashya ho gukura ubucuruzi bwacu bwo kohereza mu mahanga."

Abahanga mu nganda bagaragaje ko iterambere ryihuse rya H-beam mu bwubatsi ritagaragaza gusa iterambere ry’inganda z’ubwubatsi mu byuma byiza, ahubwo rinateza imbere udushya mu ikoranabuhanga mu nganda z’ibyuma. Mu gihe kizaza, hamwe no kunoza amahame y’igihugu ku nyubako zirinda ibidukikije n’ubwubatsi budakoresha karubone nke, ibicuruzwa bya H-beam bifite imikorere myiza, kurengera ibidukikije no gukwirakwiza ibintu bitandukanye bizagira uruhare runini mu guteza imbere iterambere ry’inganda z’ubwubatsi rifite ireme.