The Earthquake Engineering Online Archive

Experimental investigation into the seismic behavior of critical regions of reinforced concrete components as influenced by moment and shear

Çelebi, Mehmet; Penzien, Joseph

UCB/EERC-73/04, Earthquake Engineering Research Center, University of California, Berkeley, 1973-01, 166 pages (530/C37/1973)

The behavior of reinforced concrete components simulating interior beams with column stubs is investigated. The stirrup spacing and shear span-to-depth ratios of each beam in a series of twelve were varied in order to study their influences on energy absorption and stiffness degrading properties. The beams were loaded by using a hydraulically powered, electronically controlled actuator. Similar beams were tested under quasi-static and dynamic conditions. Load-deflection, moment-curvature and shearforce, shear-deformation types of relationships have been obtained. The results are discussed in terms of energy absorption, stiffness deterioration, strength and deflection ductility. It is concluded that for low nominal shear stresses, the spacing requirements of the codes should be relaxed. It has been observed that dynamic loading has no significant influence on the behavior of the components except for increasing their yielding strength. The pinching due to shear which is significant for higher nominal shear stresses should be accommodated in mathematical models to correctly represent stiffness degradation and energy absorption properties.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-73-04.pdf (18 MB)