AN EXPERIMENTAL RESEARCH ON HYSTERETIC BEHAVIOR OF RC BEAMS UNDER SIGNIFICANT GRAVITY LOADS

Yıl 2018, Cilt: 10 Sayı: 4, 25 - 36, 01.10.2018

Cem Aydemir , Müberra Eser Aydemir , Pınar Yıldırım

Öz

In this study, hysteretic behavior of RC beams with and without significant
gravity load effects are investigated. To this purpose, an experimental program is
carried out in which gravity loads are applied by force controlled test procedure
whereas cyclic loads are applied by displacement controlled test procedure. The
results of tests with gravity load effect are compared with the results of control
specimens with increasing displacement loading profile. Experimentally observed
damage states and deformation demands are compared with the respective values
proposed by Turkish Seismic Design Code. It is found that, the loading procedure
with significant gravity load effect leads to the formation of unidirectional plastic
hinges. Besides, the deformation capacities of the specimens are found to be
much higher than the code based deformation capacities.

Anahtar Kelimeler

Damage Limits, Rotation Capacity, Strain Limits, Experimental Load Displacement Relations, Plastic Hinge Length

Kaynakça

• Turkish Seismic Design Code, Ministry of Public Works and Settlement, Ankara, 2007. EN 1998-3, Eurocode 8: “Design of Structures for Earthquake Resistance-Part 3: Assessment and Retrofitting of Buildings”, Brussels, 2003. ECCS, “Recommended testing procedure for assessing the behaviour of structural steel elements under cyclic loads”, European Convention for Constructional Steelwork, 1985. ACI T1.1-01, “Acceptance criteria for moment frames based on structural testing”, ACI, 2001. ATC Report No. 24, “Guidelines for seismic testing of components of steel structures”, ATC, 1992. Corley, G. W., “Rotational Capacity of Reinforced Concrete Beams”, Journal of the Structural Division, ASCE, V. 92, 121-146, 1966. Baker, A. L. L., and Amarakone, A. M. N., “Inelastic Hyperstatic Frame Analysis”, Flexural Mechanics of Reinforced Concrete, ACI, SP-12, 85-142, 1967. Mattock, A. H., “Rotational Capacity of Hinging Regions in Reinforced Concrete Beams”, Flexural Mechanics of Reinforced Concrete, ACI, SP-12, 143-181, 1967. Eligehausen, R., and Langer, P., “Rotation Capacity of Plastic Hinges and Allowable Moment Redistribution”, CEB Bulletin, No. 175, I7.9-I7.27, 1987. Hillerborg, A., “Fracture Mechanics Concepts Applied to Moment Capacity and Rotational Capacity of Reinforced Concrete Beams”, Engineering Fracture Mechanics, V. 35, 233-240, 1990. Bigaj, A. J., “Structural Dependence of Rotation Capacity of Plastic Hinges in RC Beams and Slabs”, PhD thesis, Delft University, the Netherlands, 1999. Bigaj, A. J., and Walraven, J., “Size Effects on Plastic Hinges of Reinforced Concrete Members”, Heron, V. 47, 53-75, 2002. Ma, S.Y.M., Bertore, V.V, and Popov, E.P., “Experimental and Analytical Studies On Hysteretic Behavior of Reinforced Concrete Rectangular and T-Beams”, Report EERC 76-2, University of California, Berkeley, May 1976, 241 pages. Walker A.F. and Dhakal R.P., “Assessment of material strain limits for defining plastic regions in concrete structures”, Bulletin of The New Zealand Society for Earthquake Engineering, Vol. 42, No. 2, 2009. Gião R., Lúcio V., and Chastre C., “Assessing the behaviour of RC beams subject to significant gravity loads under cyclic loads”, Engineering Structures, Vol. 59, 512-21, 2014. Megget, L. M. and Fenwick, R. C. (1989). “Seismic behaviour of a reinforced concrete portal frame sustaining gravity goads”, Bulletin of NZ Society for Earthquake Engineering, Vol. 22, No. 1 ASCE, (2006). “Seismic Rehabilitation of Existing Buildings,” ASCE Standard ASCE/SEI 41-06, American Society of Civil Engineers, Reston, Virginia. Y.Jiao, S.Kishiki, S.Yamada (2012). “Loading protocols employed in evaluation of seismic behavior of steel beams in weak-beam moment frames”, 2012 15 WCEE LISBOA