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Assessment of Toughness of Concrete Subject to Elevated Temperatures from Complete Load-Displacement Curve - Part I:General Introduction


Zhang, B.; Bićanić, Nenad; Pearce, C.J.; Balabanić, Gojko
Assessment of Toughness of Concrete Subject to Elevated Temperatures from Complete Load-Displacement Curve - Part I:General Introduction // ACI Materials Journal, 97 (2000), 5; 550-555 (međunarodna recenzija, članak, znanstveni)


Naslov
Assessment of Toughness of Concrete Subject to Elevated Temperatures from Complete Load-Displacement Curve - Part I:General Introduction

Autori
Zhang, B. ; Bićanić, Nenad ; Pearce, C.J. ; Balabanić, Gojko

Izvornik
ACI Materials Journal (0889-325X) 97 (2000), 5; 550-555

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Load; temperature; toughness

Sažetak
The fracture and toughness of concrete is significantly influenced by heating scenarios, including heating temperature and exposure time ; however, information on the quantitative assessment of the concrete toughness is very limited. In this paper six energy-based and deformation-based toughness indexes were sumarised and compared for assessing the concrete toughness. A two-portion complete load-displacement relationship containing load, characteristic displacement and geometric coefficients was also proposed, and the physical meanings of these parameters were illustrated. Meanwhile, the effect of self-weight of the beam specimen under three-point bending on the concrete toughness was considered. In general, the energy-based toughness indexes were more appropriate than the deformation-based indexes, and toughness including covering the whole failure process were more appropriate and applicable than those only covering the ascending branch. In Part II of this paper, the relationships of these parameters with heating temperature, exposure time, and even curing age will be determined based on the three-point bending tests on preheated concrete beams. Thus, the effects of these influencing factors on the concrete toughness can be quantitatively assessed by using the six proposed toughness indexes.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo



POVEZANOST RADA


Projekt / tema
114102

Ustanove
Građevinski fakultet, Rijeka

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus