A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Električno zavarena armaturna rešetka u armiranobetonskim rebrastim pločama ; Electro-welded lattice reinforcement in reinforced concrete ribbed slabs
U radu se provodi eksperimentalna provjera posmične čvrstoće montažnih betonskih rebrastih ploča različitih visina s električno zavarenom armaturnom rešetkom. Prikazano je tehničko obrazloženje korištenja visokih rešetki u armaturi montažnih lakih rebrastih ploča u obliku dvostrukog slova T i montažnih armiranobetonskih ploča debljine 30 cm. Utvrđeno je da je doprinos betona posmičnoj čvrstoći uvijek veći od vrijednosti koje se mogu očekivati prema španjolskim normama. Osim toga, kako se niske rešetkaste rebraste ploče odlikuju nižim vrijednostima granične posmične čvrstoće od onih koje se očekuju prema normama, utvrđeno je da se treba osigurati odgovarajuća visina rešetaka u rebrastim pločama kako bi se osiguralo sidrenje tlačne zone te razvoj mehanizama štapova i zatega. Zato se u armiranobetonskim rebrastim pločama svakako preporučuje korištenje rešetkastih nosača na otprilike 80 % visine uzorka kada dužina pojasa rešetke iznosi 20 cm. ; Shear strength of precast concrete ribbed slabs reinforced with electro-welded lattice girders of variable height is experimentally verified. Technical justification is given for the use of high latticework in the reinforcement of precast lightweight double-tee ribbed slabs and precast reinforced concrete slabs 30 cm in thickness. It was established that the contribution of concrete to shear strength was always higher than the expected values according to Spanish standards. Furthermore, as low lattice ribbed slabs exhibited lower ultimate shear strength values than the ones expected based on the standards, the need arose to provide an adequate height of lattices in ribbed slabs to ensure anchorage of the compressed area in order to develop the strut-and-tie mechanisms. Consequently, lattice girders with approximately 80% of specimen height are highly recommended in reinforced concrete ribbed slabs, when the length of lattice chords is 20 cm.
Električno zavarena armaturna rešetka u armiranobetonskim rebrastim pločama ; Electro-welded lattice reinforcement in reinforced concrete ribbed slabs
U radu se provodi eksperimentalna provjera posmične čvrstoće montažnih betonskih rebrastih ploča različitih visina s električno zavarenom armaturnom rešetkom. Prikazano je tehničko obrazloženje korištenja visokih rešetki u armaturi montažnih lakih rebrastih ploča u obliku dvostrukog slova T i montažnih armiranobetonskih ploča debljine 30 cm. Utvrđeno je da je doprinos betona posmičnoj čvrstoći uvijek veći od vrijednosti koje se mogu očekivati prema španjolskim normama. Osim toga, kako se niske rešetkaste rebraste ploče odlikuju nižim vrijednostima granične posmične čvrstoće od onih koje se očekuju prema normama, utvrđeno je da se treba osigurati odgovarajuća visina rešetaka u rebrastim pločama kako bi se osiguralo sidrenje tlačne zone te razvoj mehanizama štapova i zatega. Zato se u armiranobetonskim rebrastim pločama svakako preporučuje korištenje rešetkastih nosača na otprilike 80 % visine uzorka kada dužina pojasa rešetke iznosi 20 cm. ; Shear strength of precast concrete ribbed slabs reinforced with electro-welded lattice girders of variable height is experimentally verified. Technical justification is given for the use of high latticework in the reinforcement of precast lightweight double-tee ribbed slabs and precast reinforced concrete slabs 30 cm in thickness. It was established that the contribution of concrete to shear strength was always higher than the expected values according to Spanish standards. Furthermore, as low lattice ribbed slabs exhibited lower ultimate shear strength values than the ones expected based on the standards, the need arose to provide an adequate height of lattices in ribbed slabs to ensure anchorage of the compressed area in order to develop the strut-and-tie mechanisms. Consequently, lattice girders with approximately 80% of specimen height are highly recommended in reinforced concrete ribbed slabs, when the length of lattice chords is 20 cm.
Električno zavarena armaturna rešetka u armiranobetonskim rebrastim pločama ; Electro-welded lattice reinforcement in reinforced concrete ribbed slabs
Aragón, Ángel (author) / Pérez-Acebo, Heriberto (author) / Aragón, Guillermo (author) / Salas, Miguel Ángel (author)
2021-01-01
Građevinar ; ISSN 0350-2465 (Print) ; ISSN 1333-9095 (Online) ; Volume 73 ; Issue 07.
Article (Journal)
Electronic Resource
English , Croatian
DDC:
690
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