I-Concrete FixEFreced Concrete (SFRC) uhlobo olusha lwezinto ezihlanganisiwe ezingathululwa futhi lufafazwe ngokungeza inani elifanele lensimbi emfushane yensimbi kukhonkolo ojwayelekile. Isungule ngokushesha ekhaya nakwamanye amazwe eminyakeni yamuva. Inqoba ukushiyeka kwamandla aphansi aphansi, ukugcwala okuncane kokugcina kanye ne-brittle impahla kakhonkolo. Inezakhiwo ezinhle kakhulu njengamandla ashubile, ukumelana nokugoba, ukumelana nokuphefumula, ukumelana kokuqhekeka, ukumelana nokukhathala kanye nokuqina kokukhathala. Kusetshenziswe ku-Hydraulic Engineering, umgwaqo kanye nebhuloho, ukwakhiwa kanye nezinye izinkambu zobunjiniyela.

 

一.Ukuthuthukiswa kwensimbi fiber aqinisiwe ukhonkolo

 

Ukhonkolo oqinisiwe wefayibha (i-FRC) yisifinyezo sokhonkolo oqinisiwe wefayibha. Imvamisa iyinhlanganisela esekwe ngosimende eyakhiwa unamathisela usimende, udaka noma ukhonkolo kanye nensimbi yensimbi, i-inorganic fiber noma izinto eziqinisiwe ze-viber. Yizinto ezintsha zokwakha ezakhiwe ngokusabalalisa ngokufana nemicu emifushane futhi emihle ngamandla aphezulu aphezulu, ukuqina okuphezulu okuphezulu kanye nokuphikiswa okuphezulu kwe-alkali ku-matrix ekhonkolo. I-fiber in ukhonkolo ingakhawulela isizukulwane semifantu kusenesikhathi ngokhonkolo kanye nokwanda okwengeziwe kwemifantu ngaphansi kwesenzo samandla angaphandle, ngempumelelo ukuqiniseka okuphansi okufana nokuqina kokhonkolo okuphansi, futhi kuthuthukisa kakhulu ukusebenza kokungaphambi kokungapheli, okungangeni manzi, ukumelana nesithwathwa kanye nokuqiniswa kukakhonkolo. Ukhonkolo oqinisiwe wefayibha, ikakhulukazi ukhonkolo wensimbi waqiniswa ukhonkolo, uhehe ukunakwa okuningi ngokwemibuthano yezifundo nezobunjiniyela ebunjiniyela obusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza kwayo okusebenzayo ngenxa yokusebenza okuphezulu kwayo. I-1907 Isazi Soviet B П. I-Hekpocab yaqala ukusebenzisa indwangu yensimbi ekhonkolo; Ngo-1910, i-HF PORTER yashicilela umbiko wokucwaninga ngokhonkolo omfushane we-fiber, iphakamisa ukuthi imicu emifushane yensimbi kufanele ihlakazeke ngokulinganayo kukhonkolo ukuze iqinise izinto zokwenziwa ze-matrix; Ngo-1911, uGraham wase-United States angezelwa ngokhonkolo ojwayelekile ukuze athuthukise amandla nokuqina kokhonkolo; Ngawo-1940s, United States, eBrithani, eFrance, iJalimane, iJapan namanye amazwe benze ucwaningo oluningi ngokusebenzisa i-fiber yensimbi ukuthuthukisa ukumelana kwensimbi kanye nokhonkolo kakhonkolo, kanye nokwenza ngcono i-chaincree Ukwakheka kwe-fiber yensimbi ukuthuthukisa amandla okubopha phakathi kwe-fiber kanye ne-matrix kakhonkolo; Ngo-1963, uJP Rualdi noGB Batson bashicilela iphepha ngendlela yokuthuthukisa ukuthuthukiswa kwe-fiber ekhishwe ngokhonkolo yensimbi, bese bebeka phambili esiphethweni sokuthi amandla okuqhekeka wensimbi egcizelelwa yi-spacesing yensimbi edlala indima esebenzayo Ekucindezelekeni okuthe xaxa (i-fiber spacering theory), ngaleyo ndlela iqale isigaba sokuthuthuka salezi zinto ezintsha zenhlanganisela. Kuze kube manje, ngokuthandwa kanye nokusetshenziswa kokhonkolo wensimbi okuqinisiwe, ngenxa yokusatshalaliswa okuhlukile kwemicu ngokhonkolo, kunezinhlobo ezine zensimbi eziqinisiwe, i-hybrid fiber eqinisiwe fiber okuqiniswe ngokhonkolo ukhonkolo oqinisiwe.

 

二.Ukuqinisa indlela yensimbi yensimbi eqinisiwe kukhonkolo

 

I-FisePososposte mechanics theory. Ithiyori of composite mechanics isuselwa emcabangweni we-fiber composites aqhubekayo futhi ahlanganiswe nezimpawu zokusatshalaliswa kwemicu yensimbi ngokhonkolo. Kulombhalo, ama-composites athathwa njengezihlanganisela zesigaba ezimbili nge-fiber njengesigaba esisodwa ne-matrix njengesinye isigaba.

 

I-fiber spacesing theory. I-fiber spacering theory, eyaziwa nangokuthi i-mbono yokumelana nokuqhekeka, okuhlongozwayo ngokusekelwe kumakhenikha we-laire elastic fracture. Lo mbono ubamba ukuthi umphumela wokuqinisa imicu uhlobene kuphela nokuhlukaniswa kwe-fiber ngokufanayo (ukuhlukaniswa okuncane).

 

三.Ukuhlaziywa kwesimo sokuthuthuka kwensimbi yensimbi eqinisiwe

 

1.I-Concrete eqinisiwe yensimbi.Ukhonkolo oqinisiwe wensimbi uluhlobo lukakhonkolo ophefumulelwe ofanayo nowokuqonda okuqinisile olwakhiwe ngokungeza inani elincane lensimbi ephansi ye-carbon, insimbi engenasici kanye ne-frp kukhonkolo ojwayelekile. Inani lokuxuba le-fiber yensimbi ngokuvamile i-1% ~ 2% ngevolumu, kuyilapho i-70 ~ 100kg fiber fiber ixutshwe kumitha ngayinye kakhonkolo kakhonkolo. Ubude be-fiber yensimbi kufanele kube ngu-25 ~ 60mm, ububanzi kufanele kube ngu-0.25 ~ 1.25mm, kanye nesilinganiso esihle kakhulu sobude kububanzi kufanele kube ngu-50 ~ 700. Uma uqhathanisa nokhonkolo ojwayelekile, ama-shear, ukugoba , ukugqoka nokuqhekeka kokuqhekeka, kepha futhi kukhulisa kakhulu ubunzima bokuqhekeka kanye nokuphikiswa komthelela kokhonkolo, futhi kuthuthukisa kakhulu ukumelana nokukhathala nokuqina kwesakhiwo, ikakhulukazi ukuqina kwesakhiwo, ikakhulukazi Ubunzima bungandiswa ngezikhathi eziyi-10 ~ 20. Izakhiwo zemishini zokhonkolo eziqiniswe ngokhonkolo kanye nokhonkolo ojwayelekile kuqhathaniswa eChina. Lapho okuqukethwe kwensimbi yensimbi kungu-15% ~ 20% kanye nesilinganiso sensimu yamanzi kungu-0.45, amandla ashukumisayo anda ngo-50% ~ 70%, amandla okuqina anda ngo-10 ~ 20 Amandla wokukhathala umthelela akhuphuka ngezikhathi eziyi-15 ~ 20, ubunzima obuguqukayo bukhuphuka ngamahlandla ayi-14 ~ 20, futhi ukumelana nokugqoka nakho kuthuthukiswa kakhulu. Ngakho-ke, ukhonkolo oqinisiwe wensimbi unezinto ezingcono ezingokomzimba nezemishini kunekhonkolo ecacile.

I-2.hybrid fiber ukhonkolo. Imininingwane yokucwaninga efanelekile Khombisa ukuthi i-fiber yensimbi ayikhuthazi kakhulu amandla acindezelayo kakhonkolo, noma anciphise; Uma kuqhathaniswa nokhonkolo olucacile, kukhona okuhle nokungalungile (ukukhuphuka nokuncipha) noma ukubukwa okuphakathi kokungaphambi kokuvinjwa, ukugqoka kanye nokuvimbela ukumelana kwensimbi eqinisiwe ngokhonkolo. Ngaphezu kwalokho, ukhonkolo oqinisiwe wensimbi uqinisile kunezinkinga ezithile, njengemithamba enkulu, intengo ephezulu, ukugqwala, ukugqwala futhi kungabikho ukumelana okubangelwa umlilo, okuthinte isicelo sayo kuma-degree ahlukahlukene. Eminyakeni yamuva nje, ezinye izazi ezifuywayo nakwamanye amazwe zaqala ukunaka i-hybrid fiber ukhonkolo (HFRC), zizama ukuxuba imicu enezakhiwo ezahlukahlukene nezinzuzo, funda komunye nomunye, futhi ninikeze ukudlala "ekudleni okuhle kwe-hybrid" emazingeni ahlukene futhi Ukulayisha izigaba ukuthuthukisa izakhiwo ezahlukahlukene zikakhonkolo, ukuze kuhlangatshezwane nezidingo zamaphrojekthi ahlukile. Kodwa-ke, maqondana nezakhiwo zayo ezahlukahlukene zemishini, ikakhulukazi ukukhathala ukukhathala kanye nomonakalo wokukhathala, umthetho wokuthuthukiswa kwezimo ngaphandle kokulimala ngaphansi kwemithwalo ye-static and ashukumisayo noma inani eliphakeme lokuxuba kanye nokuxubana kwe-fiber, ubudlelwano phakathi kwezingxenye zezinto ezihlanganisiwe, umphumela wokuqinisa kanye nendlela yokuqinisa, ukusebenza kwe-anti catking, indlela yokuhluleka kanye nobuchwepheshe bokwakha, izinkinga zokuklanywa kwengxenye yokuxubana kudingeka ukuba kubuye kufundwe.

3.Ukusebenza kwensimbi yensimbi okuqinisekisiwe ngokhonkolo.I-monolithic fiber fiber okuqinisiwe akulula ukuxuba ngokulinganayo, i-fiber ilula kakhulu, inani le-fiber likhulu, futhi izindleko ziphezulu kakhulu, okuthinta uhlelo lwayo oluphezulu. Ngenani elikhulu lemikhuba yobunjiniyela kanye nocwaningo lwe-theoretical, uhlobo olusha lwesakhiwo sensimbi yensimbi, ungqimba lwensimbi yensimbi eqinisiwe ngokhonkolo (LSFRC), okuhlongozwayo. Inani elincane lensimbi yensimbi liyasatshalaliswa ngokulinganayo ezindaweni ezingenhla nezingaphansi ze-Slab yomgwaqo, futhi eliphakathi liseyinto ecacile ukhonkolo. I-fiber yensimbi ku-LSFRC ivame ukusatshalaliswa ngesandla noma ngomshini. I-fiber yensimbi yinde, futhi isilinganiso sobubanzi obuphakathi ngokuvamile phakathi kuka-70 ~ 120, okukhombisa ukusatshalaliswa okunezinhlangothi ezimbili. Ngaphandle kokuthinta izakhiwo zemishini, lokhu okuqukethwe akukunciphisi kakhulu inani le-fiber fiber, kodwa futhi kugwema into ye-fiber agglomeration ekuxubeni kokhonkolo okuhlanganisiwe kwe-fiber okuqinisiwe. Ngaphezu kwalokho, isikhundla sensimbi ye-fiber ungqimba ngokhonkolo sinomthelela omkhulu emandleni aguquguqukayo kakhonkolo. Umphumela wokuqiniswa kwensimbi yensimbi yensimbi ezansi kokhonkolo uhamba phambili. Ngesikhundla sensimbi ye-fiber ungqimba, umphumela wokuqinisa uncipha kakhulu. Amandla aguqukayo we-LSFRC angaphezulu kwama-35% aphezulu kunalokhonkolo olucacile olunengxenye efanayo yokuxubana, ephansi kancane kuneyokhonkolo ehlanganisiwe yensimbi eqinisiwe. Kodwa-ke, i-LSFRC ingagcina izindleko eziningi ezibonakalayo, futhi ayikho inkinga yokuxuba okunzima. Ngakho-ke, i-LSFRC iyinto entsha enezinzuzo ezinhle zenhlalo nezomnotho namathemba wohlelo lokusebenza olubanzi, olufanele ukuthandwa kanye nesicelo ekusetshenzisweni kokwakhiwa kwepantuli.

 

4.Ukhonkolo we-hybrid fiber crecrete.I-ConcRid Hybrid fiber aqinisiwe Concrete (LHFRC) iyisitatimende esiyinhlanganisela esakhiwe ngokungeza i-polypropylene fiber ngesisekelo se-LSFRC futhi sisatshalaliswe i-polypropylene ephakeme kakhulu ngensimbi ephezulu nephansi ukhonkolo ukhonkolo kanye nokhonkolo ocacile engxenyeni ephakathi. Kungakunqoba ubuthakathaka be-LSFRC Intermediate Plain ungqimba lukakhonkolo kakhonkolo futhi uvikele izingozi zokuphepha ezingaba khona ngemuva kokuthi i-surver yensimbi yensimbi igayiwe. I-LHFRC ingathuthukisa kakhulu amandla aguqukayo kakhonkolo. Uma kuqhathaniswa nokhonkolo olucacile, amandla alo aguqukayo kakhonkolo osobala akhuphuka ngamaphesenti angama-20, futhi aqhathaniswa ne-LSFRC, amandla alo aguqukayo anda ngo-2.6%, kepha anethonya elincane ku-modulus ye-cleccrete. I-Flemral Elastic Modulus ye-LHFRC iphakeme ngo-1.3% ngaphezulu kwekhonkolo ecacile no-0.3% ephansi kunaleyo ye-LSFRC. I-LHFRC ingaphinde futhi ithuthukise kakhulu ubulukhuni be-flemral lwekhonkolo, futhi inkomba yayo yokuqina ye-flexiral Ghity imayelana nezikhathi eziyi-8 kukhonkolo kakhonkolo. Ngaphezu kwalokho, ngenxa yokusebenza okuhlukile kwemicu emibili noma ngaphezulu ku-LHFRC ngokhonkolo, ngokuya ngezidingo zobunjiniyela, umphumela we-hybrid omuhle, umphumela wensimbi omuhle wokwenziwa ngokhonkolo ungasetshenziswa ukuthuthukisa i-dectility, ukuqina, ukuqina, ubulukhuni, amandla okuqhekeka , Amandla aguqukayo namandla ashubile wezinto ezibonakalayo, athuthukise ikhwalithi yezinto ezibonakalayo futhi andise impilo yenkonzo yezinto ezibonakalayo.

-Abstract (Shanxi Architecture, Vol. 38, No. 11, Chen HuiQing)