Seismic behavior of high strength concrete beams

✍ Scribed by Xiao, Yan ;Ma, Rui

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 707 KB
• Volume: 7
• Category: Article
• ISSN: 1062-8002
• DOI: 10.1002/(sici)1099-1794(199803)7:1<73::aid-tal92>3.0.co;2-a

✦ Synopsis

Experimental and analytical studies on the seismic performance of high strength concrete beams in moment resisting frame structures are described. Two large-scale high strength concrete and two counterpart normal strength concrete model beams with a length-to-depth ratio of 6⋅0 (i.e. shear span ratio of 3⋅0) have been tested under cyclic shear and double bending. The beams were heavily reinforced in the longitudinal direction to study beam performance under high seismic shear demand. Transverse reinforcement was designed following the seismic design provisions of current ACI 318-95 code. Both high and normal strength concrete beams developed ductile flexural responses. High strength concrete beams exhibited increased capacity and improved hysteretic performance compared to normal strength concrete beams. A simple analytical approach based on the moment curvature characteristics of critical sections has also been developed to predict the flexural behavior of structural beams. Comparison of analytical and test results indicates that behavior of high strength concrete beams can be satisfactorily predicted.