Towards Earthquake-Resistant Concrete Structures with Ultra High-Strength Steel Reinforcement

Abstract eng:
New design provisions for structural concrete (ACI 318-08) allow the replacement of lower strength steels (e.g., ASTM A615 and ASTM A706) with steels having specified yield strengths well in excess of 80 ksi (550 MPa). Since the use of higher yield strength steel in member design is allowed only when determining required confinement reinforcement in compression members, and not when determining reinforcement required for shear, torsion, and/or flexure, the full potential for steel reduction is severely restricted. A collaborative experimental program between Penn State University and Purdue University is aimed at studying the behavior of concrete members reinforced both longitudinally and transversely with ultra high-strength steels. The investigation focuses on the deformation capacity of beams and columns subjected to displacement reversals and on corrective measures for achieving the rotation capacities associated with traditional reinforcing steels. A summary of the experimental program is presented with details on test setup, loading protocol, number of specimens, and specimen geometry.

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