Modulus of luthambe ngekonkriti: koko kwaye ukuchaza njani?

Ngoko ke abantu abaninzi abanomdla ukuba nomthelela kuyilo amandla ezahlukeneyo eziphathekayo kunye nomthwalo nempembelelo. Eziphathekayo umzimba okuqinileyo ukusoloko ukuxhathisa deformation xa baboniswa imikhosi yangaphandle. Yeyona ukukwazi deformation elastic (uhlobo okwethutyana) ibonisa modulus obubambekayo luthambe.

Ubukhulu luthambe wayezimisele kwi iimvavanyo ezahlukeneyo isampuli zokumelana ungakhululekanga, okanye ucinezelo. Nangona kunjalo, qaphela ukuba eziphathekayo, nto leyo aliqulathanga unyanzeliso, eqine ezingazinzanga. Ngokusekelwe kwiziphumo zovavanyo iyelenqe asahlumayo lwegciwane umbandela isicelo ukuya umgudu. Kuyabonakala negalelo ekuqondeni ngcono. Kuyimfuneko ukwazi modulus lokuqala okubuyela kwimo ye ebambekayo isixa deformation.

Phantsi umthwalo, deformation ukunyuka ngenxa yokuba eziphathekayo unalo impahla ezifana alawule. Okokuqala, phantsi koxinzelelo ethile, kukho kwenzeka deformation ilastiki. It is a isenzeko apho umzimba gqitha yi umthwalo returns ukuba ifomu yalo yokuqala emva Ukunyamalala kwayo. Ngoko, xa umthamo ngakumbi ekuqaleni izinto ukuba zenzeke, vuhlayiseki (iplastiki) deformation. Noko ke, ahlulelane zeplastiki kunye notshintsho elastic nzima kakhulu. Ngenxa yokuba utshintsho lwephanyazo kwi imilo ixhomekeke isantya sokwanda umthwalo. Ngenxa yale deformation ngexesha ukwanda umthwalo kuthiwa ilastiki, kunye nokwanda ngakumbi sengozini - yeplastiki. Oku kungenxa ukungenelela eziphathekayo. deformation vetshe sele ukutshatyalaliswa into. Le modulus of luthambe ngekonkriti isoloko ekwabizwa ngokuba modulus of deformation. It uzimisele besebenzisa iindlela ezahlukeneyo.

Modulus of luthambe ngekonkriti kuxhomekeke nzima kakhulu ekuqaleni. Noko ke, ixabiso layo omalunga zingasetwa ngokungangqalanga. Iitshathi abaninzi umgca secant ukuya kwigophe, ebonisa ukuxhomekeka yengcinezelo-ubunzima, ngokufuthi kakhulu, nangona akusoloko, kufana ilayini ezibambanayo kodwa azikweli, elihamba nge imvelaphi.

Ngokwentelekiso ethembekile ngoluvo ukuba modulus obubambekayo luthambe kwandisa ngokomlinganiselo ngqo ukuya ingcambu yamandla akhe. Nangona kunjalo, oku kuyinyaniso kwindawo engundoqo ye igrafu (uxinzelelo-ubunzima) kuphela kwaye kuxhomekeke kokusingqongileyo kunye neemeko uvavanyo. Ngokomzekelo, iintlobo izinto ngamanzi ayegcwele kwi uvavanyo abe modulus enkulu kwisalathisi luthambe ngaphezu iisampuli ezomileyo. Nangona iimpawu zazo amandla ziyafana.

Ngomhla modulus of luthambe zichaphazela kakhulu umgangatho aggregate irhabaxa. Oku kuxhomekeka kukuba rectilinear. Ngokwendalo, inani le ngekhonkrithi ezilula kuya kuba ngaphantsi kwe iisampuli enzima. Le luthambe kwandisa kunye nobudala izinto. Umzekelo, ukuba modulus of luthambe of B25 eziphathekayo, kuya kuba ngaphezulu konyaka omnye kunokuba bekunjalo ekuqaleni, kodwa emva kweminyaka 10 kuya kukhula ngakumbi. Ukuze ubone Ipharamitha luthambe kukho itafile okhethekileyo, nto leyo ebonisa ukuba modulus uqikelelo yokuqala material kwegama ngalinye.