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Izinto ezine zerubha eziphathekayo zentsimbi (i-RuCFST), enye ipayipi yentsimbi yekhonkrithi (CFST) kunye nento enye engenanto yavavanywa phantsi kweemeko zokugoba ezicocekileyo.Iiparamitha eziphambili ziyi-shear ratio (λ) ukusuka kwi-3 ukuya kwi-5 kunye ne-rubber replacement ratio (r) ukusuka kwi-10% ukuya kwi-20%.Ukugoba umzuzu wokugoba ijika, ukugoba umzuzu-ukujika ijika, kunye nokugoba-i-curvature curvature ifunyenwe.Indlela yokutshatyalaliswa kwekhonkrithi ene-rubber core yahlalutywa.Iziphumo zibonisa ukuba uhlobo lokungaphumeleli kwamalungu e-RuCFST kukungaphumeleli kwe-bend.Ukuqhekeka kwikhonkrithi yerubha ihanjiswa ngokulinganayo kwaye iyancipha, kwaye ukuzalisa ikhonkrithi engundoqo kunye ne-rubber kuthintela ukuphuhliswa kokuqhekeka.Umlinganiselo we-shear-to-span wawunempembelelo encinci ekuziphatheni kweesampuli zovavanyo.Izinga lokutshintshwa kwerabha linempembelelo encinci kwisakhono sokumelana nomzuzu wokugoba, kodwa linefuthe elithile ekugobeni kokuqina komzekelo.Emva kokuzaliswa ngekhonkrithi yerubha, xa kuthelekiswa neesampuli ezivela kumbhobho wensimbi engenanto, ukukwazi ukugoba kunye nokuqina kokugoba kuphuculwe.
Ngenxa yokusebenza kakuhle kwenyikima kunye nomthamo ophezulu wokuthwala, izakhiwo ze-tubular zekhonkrithi zemveli (CFST) zisetyenziswa ngokubanzi kubunjineli bale mihla1,2,3.Njengohlobo olutsha lwekhonkrithi yerabha, amasuntswana erabha asetyenziselwa ukubuyisela ngokuyinxenye iiaggregates zendalo.Izakhiwo zeRubber Concrete Filled Steel Pipe (RuCFST) zenziwe ngokuzalisa imibhobho yentsimbi ngerubha ikhonkrithi ukunyusa i-ductility kunye nokusebenza kakuhle kwamandla kwezakhiwo ezidibeneyo4.Ayisebenzisi nje kuphela ukusebenza kakuhle kwamalungu e-CFST, kodwa iphinda isebenzise ngokufanelekileyo inkunkuma yerabha, ehlangabezana neemfuno zophuhliso loqoqosho olusetyhula eluhlaza5,6.
Kwiminyaka embalwa edlulileyo, ukuziphatha kwamalungu e-CFST yendabuko phantsi komthwalo we-axial7,8, i-axial load-moment interaction9,10,11 kunye ne-bending12,13,14 ecocekileyo ifundwe kakhulu.Iziphumo zibonisa ukuba amandla okugoba, ukuqina, i-ductility kunye namandla okutshatyalaliswa kwamandla kwiikholomu ze-CFST kunye nemiqadi iphuculwe ngokuzaliswa kwekhonkrithi yangaphakathi kwaye ibonise i-fracture ductility efanelekileyo.
Okwangoku, abanye abaphandi baye bafunda ukuziphatha kunye nokusebenza kweekholamu ze-RuCFST phantsi kwemithwalo ye-axial edibeneyo.U-Liu no-Liang15 benza imifuniselo emininzi kwiikholamu ezimfutshane ze-RuCFST, kwaye xa kuthelekiswa neekholamu ze-CFST, umthamo wokuthwala kunye nokuqina kwehle ngokunyuka kwe-rubber substitution degree kunye nobukhulu bamasuntswana erabha, ngelixa i-ductility yanda.I-Duarte4, i-16 ivavanye iikholamu ezininzi ezimfutshane ze-RuCFST kwaye yabonisa ukuba iikholomu ze-RuCFST zaziyi-ductile kunye nomxholo okhulayo we-rubber.I-Liang17 kunye ne-Gao18 nazo zichaze iziphumo ezifanayo kwiipropati zeeplagi ze-RuCFST ezigudileyo kunye nezibhityileyo.UGu et al.19 kunye noJiang et al.20 bafunde umthamo wokuthwala izinto zeRuCFST kwiqondo lokushisa eliphezulu.Iziphumo zibonise ukuba ukongezwa kwerabha kwandisa i-ductility yesakhiwo.Njengoko iqondo lokushisa liphakama, amandla okuthwala ekuqaleni ayancipha kancane.I-Patel21 yahlalutya i-compressive and flexural behavior of short CFST beams and columns with round ends under axial and uniaxial loading.Imodeli yokubala kunye nohlalutyo lweparametric lubonisa ukuba izicwangciso zokulinganisa i-fiber-based simulation zinokuhlola ngokuchanekileyo ukusebenza kwee-RCFST ezimfutshane.Ukuguquguquka kunyuka ngomlinganiselo we-aspect ratio, amandla entsimbi kunye nekhonkrithi, kwaye iyancipha ngobunzulu ukuya kumlinganiselo wokutyeba.Ngokubanzi, iikholamu ezimfutshane ze-RuCFST ziziphatha ngendlela efanayo kwiikholamu ze-CFST kwaye zine-ductile kuneekholamu ze-CFST.
Inokubonwa ngokuphononongwa ngasentla ukuba iikholamu zeRuCFST ziphucula emva kokusetyenziswa ngokufanelekileyo kwezongezo zerubha kwisiseko sekhonkrithi yeekholomu zeCFST.Ekubeni kungekho mthwalo we-axial, ukugoba komnatha kwenzeka kwelinye icala lomqadi wekholomu.Enyanisweni, iimpawu zokugoba ze-RuCFST zizimeleyo kwiimpawu zomthwalo we-axial22.Kubunjineli obusebenzayo, izakhiwo zeRuCFST zihlala ziphantsi kwemithwalo yomzuzu wokugoba.Uphononongo lweempawu zayo ezisulungekileyo zokugoba kunceda ukumisela ukuguquka kunye neendlela zokungaphumeleli kwezinto ze-RuCFST phantsi kwesenzo se-seismic23.Kwizakhiwo ze-RuCFST, kuyimfuneko ukufunda iimpawu zokugoba ezicocekileyo zezinto ze-RuCFST.
Ngokuphathelele kulo mba, iisampulu ezintandathu zavavanywa ukuze kufundwe iipropathi zoomatshini zezinto zombhobho wentsimbi egobileyo.Inxalenye yeli nqaku ilungelelaniswe ngolu hlobo lulandelayo.Okokuqala, imizekelo emithandathu yecandelo lesikwere kunye okanye ngaphandle kokuzaliswa kweerubha zavavanywa.Qwalasela imo yokungaphumeleli kwesampulu nganye kwiziphumo zovavanyo.Okwesibini, ukusebenza kwezinto ze-RuCFST ekuguqeni okucocekileyo kwahlaziywa, kwaye umphumo we-shear-to-span ratio ye-3-5 kunye ne-rubber replacement ratio ye-10-20% kwizakhiwo ze-RuCFST zaxoxwa.Ekugqibeleni, ukungafani komthamo wokuthwala kunye nokuqina kokugoba phakathi kwezinto ze-RuCFST kunye nezinto ze-CFST zendabuko zithelekiswa.
Kwagqitywa imizekelo emithandathu yeCFST, emine yazaliswa ngekhonkrithi eyenziwe zerabha, omnye uzaliswe ngekhonkrithi eqhelekileyo, yaye owesithandathu wawungenanto.Iimpembelelo zokutshintsha kwerabha (r) kunye ne-span shear ratio (λ) zixoxwa.Iiparamitha eziphambili zesampulu zinikwe kwiThebhile 1. Unobumba t uchaza ubukhulu bombhobho, B ubude becala lesampulu, L bubude besampulu, i-Mue yimilinganiselo yokugoba, i-Kie yinto yokuqala. ukugoba ukuqina, i-Kse kukugoba kokuqina enkonzweni.indawo.
I-specimen ye-RuCFST yenziwe kwiipleyiti ezine zetsimbi ezidityanisiweyo ngababini ukuze zenze i-tube yentsimbi yesikwere esingenanto, eyazaliswa ngekhonkrithi.Ipleyiti yentsimbi eyi-10 mm eshinyeneyo idityaniswe kwisiphelo ngasinye somzekelo.Iimpawu zomatshini zentsimbi ziboniswa kwiThebhile 2. Ngokomgangatho waseTshayina we-GB / T228-201024, amandla e-tensile (fu) kunye namandla okuvunwa (fy) wombhobho wensimbi anqunywe yindlela yokuvavanya eqhelekileyo.Iziphumo zovavanyo ziyi-260 MPa kunye ne-350 MPa ngokulandelelanayo.Imodyuli ye-elasticity (Es) yi-176 GPa, kunye ne-Poisson's ratio (ν) yentsimbi yi-0.3.
Ngethuba lokuvavanya, i-cubic compressive force (fcu) yekhonkrithi yereferensi ngosuku lwe-28 ibalwa kwi-40 MPa.Ireyishini 3, 4 kunye ne-5 zikhethwe ngokusekelwe kwireferensi yangaphambili 25 njengoko oku kunokubonakalisa naziphi na iingxaki ngokuhanjiswa kweshifti.Amazinga amabini okutshintshwa kwerabha ye-10% kunye ne-20% endaweni yesanti kumxube wekhonkrithi.Kolu phononongo, kusetyenziswe umgubo werabha wesondo oqhelekileyo osuka kwi-Tianyu Cement Plant (i-brand ye-Tianyu e-China) yasetyenziswa.Ubungakanani beqhekeza lerabha ngu-1-2 mm.Itheyibhile 3 ibonisa umlinganiselo werubha ikhonkrithi kunye nemixube.Kuhlobo ngalunye lwekhonkrithi yerubha, ii-cubes ezintathu ezinecala le-150 mm zaphoswa kwaye zanyangwa phantsi kweemeko zovavanyo ezichazwe yimigangatho.Isanti esetyenziswe kumxube yintlabathi ye-siliceous kunye ne-coarse aggregate yi-carbonate rock e-Shenyang City, eMntla-mpuma we-China.I-28-day cubic compressive strength (fcu), amandla e-prismatic compressive (fc') kunye nemodyuli ye-elasticity (Ec) ye-rubber replacement ratios (10% kunye ne-20%) iboniswe kwiThebhile 3. Phumeza umgangatho we-GB50081-201926.
Zonke iisampuli zovavanyo zivavanywa nge-cylinder ye-hydraulic enamandla angama-600 kN.Ngexesha lokulayisha, imikhosi emibini egxininisiweyo isetyenziswe ngokulinganayo kwi-stand-point-bending test stand kwaye isasazwe phezu komzekelo.Utshintsho lulinganiswa ngeegeyiji zoxinzelelo ezintlanu kumphezulu ngamnye wesampulu.Ukuphambuka kubonwa kusetyenziswa iinzwa ezintathu zokufuduka eziboniswe kwiMifanekiso 1 kunye ne-2. I-1 kunye ne-2.
Uvavanyo lusebenzise inkqubo yokulayisha kwangaphambili.Layisha ngesantya se-2kN / s, emva koko umise kumthwalo ukuya kuthi ga kwi-10kN, khangela ukuba isixhobo kunye neseli yomthwalo zikwimeko eqhelekileyo yokusebenza.Ngaphakathi kwebhanti ye-elastic, ukunyuka komthwalo ngamnye kusebenza ngaphantsi kwesinye seshumi somthwalo wencopho oqikelelweyo.Xa umbhobho wensimbi uphela, umthwalo osetyenzisiweyo ungaphantsi kweshumi elinesihlanu lomthwalo oqikelelweyo.Bamba malunga nemizuzu emibini emva kokufaka inqanaba lomthwalo ngamnye ngexesha lesigaba sokulayisha.Njengoko isampuli isondela ekungaphumelelini, izinga lokulayisha okuqhubekayo liyancipha.Xa umthwalo we-axial ufikelela ngaphantsi kwe-50% yomthwalo wokugqibela okanye umonakalo ocacileyo ufunyenwe kwi-specimen, ukulayishwa kuphelile.
Ukutshatyalaliswa kwazo zonke iisampuli zovavanyo kubonise i-ductility elungileyo.Akukho zintanda ezicacileyo ezifunyenweyo kwindawo yokuqina yombhobho wentsimbi yesiqwenga sovavanyo.Iindidi eziqhelekileyo zomonakalo kwimibhobho yentsimbi ziboniswa kumkhiwane.3. Ukuthatha isampula ye-SB1 njengomzekelo, kwinqanaba lokuqala lokulayisha xa umzuzu wokugoba ungaphantsi kwe-18 kN m, isampula ye-SB1 ikwinqanaba eli-elastic ngaphandle kokuguqulwa okucacileyo, kwaye izinga lokunyuka kumzuzu wokugoba olinganisiweyo mkhulu kunoko. izinga lokunyuka kwe-curvature.Emva koko, umbhobho wensimbi kwindawo enqabileyo i-deformable kwaye idlulela kwinqanaba le-elastic-plastiki.Xa umzuzu wokugoba ufikelela malunga ne-26 kNm, indawo yoxinzelelo lwentsimbi ephakathi iqala ukwanda.I-Edema ikhula ngokuthe ngcembe njengoko umthwalo ukhula.I-curve-deflection curve ayinciphi de umthwalo ufikelele kwindawo ephezulu.
Emva kokuba uvavanyo lugqityiwe, isampuli ye-SB1 (i-RuCFST) kunye nesampuli ye-SB5 (i-CFST) yanqunyulwa ukuze ibone ngokucacileyo indlela yokungaphumeleli kwekhonkrithi yesiseko, njengoko kuboniswe kumfanekiso 4. Ingabonwa kwi-Figure 4 ukuba iintanda kwisampuli I-SB1 isasazwa ngokulinganayo kwaye incinci kwikhonkrithi yesiseko, kwaye umgama phakathi kwabo uvela kwi-10 ukuya kwi-15 cm.Umgama phakathi kokuqhekeka kwisampula ye-SB5 isuka kwi-5 ukuya kwi-8 cm, ukuqhekeka akuqhelekanga kwaye kucacile.Ukongeza, iintanda kwisampulu ye-SB5 yandisa malunga ne-90 ° ukusuka kwindawo yoxinzelelo ukuya kwindawo yoxinzelelo kwaye iphuhlise ukuya kuthi ga kwi-3/4 yobude becandelo.Iintanda zekhonkrithi eziphambili kwisampulu ye-SB1 zincinci kwaye zingaphantsi rhoqo kunesampulu ye-SB5.Ukutshintsha isanti ngerabha kunokuthintela ukuphuhliswa kweentanda kwikhonkrithi.
Kwikhiwane.U-5 ubonisa ukusasazwa kophambuko kubude bomzekelo ngamnye.Umgca oqinileyo yigophe lokuphambuka kwesiqwenga sovavanyo kwaye umgca onamachaphaza yi-wave yesiqingatha se-sinusoidal.Ukususela kwikhiwane.Umzobo we-5 ubonisa ukuba i-curve ye-rod deflection ihambelana kakuhle kunye ne-sinusoidal half-wave curve ekulayisheni kokuqala.Njengoko umthwalo usanda, ijika lokuphambuka liphambuka kancinci kwi-sinusoidal half-wave curve.Njengomthetho, ngexesha lokulayisha, i-curves ephambukayo yazo zonke iisampuli kwindawo nganye yokulinganisa i-symmetrical half-sinusoidal curve.
Ekubeni ukuphambuka kwezinto ze-RuCFST ekugobeni okucocekileyo kulandela ijika le-sinusoidal half-wave, i-equation yokugoba ingabonakaliswa ngolu hlobo:
Xa ubuninzi befiber strain yi-0.01, kuthathelwa ingqalelo iimeko zokwenyani zesicelo, umzuzu wokugoba ohambelanayo umiselwa njengowona mzuzu wokugoba we element27.Umthamo womzuzu wokugoba olinganisiweyo (i-Mue) ngoko ugqitywe uboniswe kwiThebhile 1. Ngokomlinganiselo womlinganiselo wokugoba umthamo (Mue) kunye nefomula (3) yokubala i-curvature (φ), i-M-φ curve kuMfanekiso 6 ingaba iyelenqe.Kwi-M = 0.2Mue28, ukuqina kokuqala kwe-Kie kuthathwa njengobunzima bokugoba be-shear obuhambelanayo.Xa i-M = 0.6Mue, ukugoba ukugoba (Kse) kwesigaba sokusebenza kumiselwe kwi-secant ehambelanayo yokugoba ukuqina.
Inokubonwa ukusuka kwigophe lomzuzu wokugoba ukuba umzuzu wokugoba kunye ne-curvature yonyuka kakhulu ngokulandelelana kwinqanaba elilastiki.Izinga lokukhula kwexesha lokugoba liphezulu ngokucacileyo kunolo lwe-curvature.Xa umzuzu wokugoba uM yi-0.2Mue, umzekelo ufikelela kwinqanaba lomda we-elastic.Njengoko umthwalo ukhula, isampuli idlula kwi-deformation yeplastiki kwaye idlulela kwinqanaba le-elastoplastic.Ngomzuzu wokugoba u-M olingana no-0.7-0.8 Mue, umbhobho wensimbi uya kuphazamiseka kwindawo yoxinzelelo kunye nendawo yoxinzelelo ngokutshintshana.Ngelo xesha, i-curve ye-Mf yesampuli iqala ukuzibonakalisa njengendawo ye-inflection kwaye ikhula ngokungaqhelekanga, ephucula umphumo odibeneyo wombhobho wensimbi kunye ne-rubber concrete core.Xa i-M ilingana ne-Mue, i-specimen ingena kwinqanaba lokuqina kweplastiki, kunye nokuphambuka kunye ne-curvature ye-specimen yanda ngokukhawuleza, ngelixa umzuzu wokugoba ukhula ngokukhawuleza.
Kwikhiwane.I-7 ibonisa iigophe zomzuzu wokugoba (M) ngokuchasene noxinzelelo (ε) kwisampulu nganye.Inxalenye ephezulu yecandelo le-middle-span yesampuli iphantsi koxinzelelo, kwaye inxalenye engezantsi iphantsi koxinzelelo.Iigeyiji zoxinzelelo eziphawulwe "1" kunye "2" zibekwe phezulu kwesiqwengana sovavanyo, iigeji zoxinzelelo eziphawulwe "3" zibekwe embindini wesampulu, kwaye iigeji zoxinzelelo eziphawulwe "4" kunye "5"” zibekwe phantsi kwesampulu yovavanyo.Inxalenye engezantsi yesampuli iboniswe kuMzobo 2. Ukususela kwi-Fig 7 kunokubonwa ukuba kwinqanaba lokuqala lokulayisha, i-longitudinal deformations kwi-tension zone kunye ne-compression zone ye-element isondele kakhulu, kwaye iziphene zimalunga nomgca.Kwinxalenye ephakathi, kukho ukunyuka okuncinci kwe-deformation longitudinal, kodwa ubukhulu bolu nyuso buncinci.Emva koko, ikhonkrithi yerubha kwindawo yoxinzelelo yaqhekeka.Ngenxa yokuba umbhobho wensimbi kwindawo yoxinzelelo kufuneka kuphela ukumelana namandla, kwaye Irubha ikhonkrithi kunye nombhobho wentsimbi kwindawo yokucinezela ithwele umthwalo kunye, ukuguqulwa kwindawo yoxinzelelo lwento inkulu kunoguquko kwi-deformation Njengoko umthwalo usanda, ukukhubazeka kudlula amandla emveliso yentsimbi, kwaye umbhobho wentsimbi ungena. Inqanaba le-elastoplastic.Izinga lokunyuka koxinzelelo lwesampulu laliphezulu kakhulu kunomzuzu wokugoba, kwaye indawo yeplastiki yaqala ukuphuhlisa kwinqanaba elipheleleyo.
I-M-um curves kwisampuli nganye iboniswe kuMfanekiso 8. Kwifig.I-8, zonke iijika ze-M-um zilandela indlela efanayo namalungu e-CFST yendabuko22,27.Kwimeko nganye, i-M-um curves ibonisa impendulo e-elastic kwisigaba sokuqala, ilandelwa ngukuziphatha kwe-inelastic kunye nokunciphisa ukuqina, de kube umzuzu wokugoba ovumelekileyo ufikeleleke ngokuthe ngcembe.Nangona kunjalo, ngenxa yeeparamitha zovavanyo ezahlukeneyo, iijika ze-M-um zahluke kancinane.Umzuzu wokuphambuka we-shear-to-span ratios ukusuka kwi-3 ukuya kwi-5 iboniswe kumkhiwane.8a.Umthamo ovumelekileyo wokugoba wesampulu ye-SB2 (i-shear factor λ = 4) yi-6.57% ngaphantsi kunesampulu SB1 (λ = 5), kunye nokukwazi ukugoba umzuzu wesampulu SB3 (λ = 3) mkhulu kunesampulu SB2 (λ = 4) 3.76%.Ngokuqhelekileyo, njengoko umlinganiselo we-shear-to-span usanda, umkhwa wenguqu kwithuba elivumelekileyo awubonakali.Ijika le-M-um alibonakali lihambelana ne-shear-to-span ratio.Oku kuhambelana noko uLu noKennedy25 bakubonayo kwimiqadi yeCFST enereyishini yokucheba ukuya kwi-span ukusuka kwi-1.03 ukuya kwi-5.05.Isizathu esinokwenzeka samalungu e-CFST sesokuba kwiireyishiyo ezahlukeneyo zokucheba, indlela yokuhambisa amandla phakathi kondoqo wekhonkrithi kunye nemibhobho yentsimbi iphantse yafana, nto leyo engacacanga njengaleyo yamalungu aqinisiweyo abambekayo25.
Ukususela kwikhiwane.I-8b ibonisa ukuba amandla okuthwala iisampuli SB4 (r = 10%) kunye ne-SB1 (r = 20%) iphezulu kancinane okanye ingaphantsi kunesampulu yemveli CFST SB5 (r = 0), kwaye yanda nge-3.15 ekhulwini kwaye yehla ngo 1 .57 ekhulwini.Nangona kunjalo, ukuqina kokugoba kokuqala (Kie) kweesampuli ze-SB4 kunye ne-SB1 ziphezulu kakhulu kunesampulu ye-SB5, eyi-19.03% kunye ne-18.11%, ngokulandelanayo.Ukuqina kokugoba (Kse) kweesampuli ze-SB4 kunye ne-SB1 kwisigaba sokusebenza yi-8.16% kunye ne-7.53% ephezulu kuneyesampuli ye-SB5, ngokulandelanayo.Babonisa ukuba izinga lokutshintshwa kwerabha linesiphumo esincinci kwisakhono sokugoba, kodwa linefuthe elikhulu ekugobeni kokuqina kwemizekelo ye-RuCFST.Oku kunokuba ngenxa yokuba iplastiki yerubha ikhonkrithi kwiisampulu zeRuCFST iphezulu kuneplastiki yekhonkrithi yendalo kwiisampuli zeCFST eziqhelekileyo.Ngokubanzi, ukuqhekeka kunye nokuqhekeka kwikhonkrithi yendalo kuqala ukusasazeka ngaphambili kunekonkrithi eyenziwe zerabha29.Ukususela kwimodi yokungaphumeleli eqhelekileyo yesiseko sekhonkrithi (umzobo 4), iintanda zesampulu ye-SB5 (ikhonkrithi yendalo) zikhulu kwaye zixinene kunezo zesampuli ze-SB1 (i-rubber concrete).Oku kunokuba negalelo ekuthinteleni okuphezulu okubonelelwa yimibhobho yentsimbi ye-SB1 Reinforced Concrete isampuli xa kuthelekiswa nesampuli ye-SB5 ye-Natural Concrete.Uphononongo lwe-Durate16 nalo lwafikelela kwizigqibo ezifanayo.
Ukususela kwikhiwane.I-8c ibonisa ukuba i-ruCFST element inamandla okugoba kunye ne-ductility kune-elementi yombhobho wentsimbi engenanto.Amandla okugoba esampula ye-SB1 esuka kwi-RuCFST (r = 20%) yi-68.90% ephezulu kuneyesampuli ye-SB6 evela kumbhobho wentsimbi engenanto, kunye nokuqina kokugoba kokuqala (Kie) kunye nokugoba ukuqina kwinqanaba lokusebenza (Kse) yesampuli ye-SB1 yi-40.52% ngokulandelelanayo., ephezulu kunesampuli ye-SB6, yayiyi-16.88% ephezulu.Isenzo esidibeneyo sombhobho wensimbi kunye nesiseko sekhonkrithi yerubha sandisa umthamo we-flexural kunye nokuqina kwento edibeneyo.Izinto ze-RuCFST zibonisa imizekelo emihle ye-ductility xa ziphantsi kwemithwalo ecocekileyo yokugoba.
Amathuba okugoba okubangele athelekiswe namaxesha okugoba achazwe kwimigangatho yoyilo lwangoku njengemithetho yaseJapan AIJ (2008) 30, imithetho yaseBritani BS5400 (2005) 31, imithetho yaseYurophu EC4 (2005) 32 kunye nemithetho yaseTshayina GB50936 (2014) 33. ukugoba umzuzu (Muc) kumzuzu wokugoba wokulinga (Mue) unikiwe kwiThebhile 4 kwaye inikezelwe kwifig.9. Amaxabiso abaliweyo of AIJ (2008), BS5400 (2005) kunye GB50936 (2014) yi 19%, 13.2% kunye 19.4% ngaphantsi kunomyinge wovavanyo amaxabiso, ngokulandelanayo.Umzuzu wokugoba obalwa ngu-EC4 (2005) ngu-7% ngaphantsi kwexabiso eliqhelekileyo lokuvavanya, elilelona likufutshane.
Iimpawu zomatshini zezinto ze-RuCFST phantsi kokugoba okucocekileyo ziphandwa ngovavanyo.Ngokusekelwe kuphando, ezi zigqibo zilandelayo zinokufikelelwa.
Amalungu avavanyiweyo e-RuCFST abonise ukuziphatha okufana neepateni ze-CFST zendabuko.Ngaphandle kweesampuli zemibhobho yensimbi engenanto, i-RuCFST kunye ne-CFST imizekelo ine-ductility enhle ngenxa yokuzaliswa kwekhonkrithi yerubha kunye nekhonkrithi.
Umlinganiselo we-shear ukuya kwi-span yahluka ukusuka kwi-3 ukuya kwi-5 kunye nefuthe elincinci kumzuzu ovavanyiweyo kunye nokuqina kokugoba.Ireyithi yokutshintshwa kwerabha ayinasiphumo kuxhathiso lwesampulu ukuya kumzuzu wokugoba, kodwa inefuthe elithile ekugobeni kokuqina kwesampulu.Ukuqina kokuqala okuguquguqukayo komzekelo we-SB1 kunye nomlinganiselo wokutshintshwa kwerabha we-10% yi-19.03% ephezulu kunomzekelo wendabuko we-CFST SB5.I-Eurocode EC4 (2005) ivumela ukuvavanywa okuchanekileyo kwamandla okugqibela okugoba kwezinto ze-RuCFST.Ukongezwa kwerabha kwisiseko sekhonkrithi kuphucula i-brittleness yekhonkrithi, ukunika izinto zeConfucian ukuqina okulungileyo.
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Ixesha lokuposa: Jan-05-2023