Pseudo-static test of reinforced concrete walls

For many year, ACI 318 limited the acceptable range of values for mechanical properties of reinforcing bars, including the yield strength, tensile-to-yield strength ratio, and fracture elongation. The maximum yield strength permitted for design purposes was set to prevent brittle failures of members and to attain sufficient deformation capacity. The use of high-strength reinforcement with yield strength in excess of 80 ksi (550 MPa) can help reduced congestion of reinforcing bars, improved quality of construction, reduced constructions time, smaller member sizes, and more usable space. The main scope of this study was to examine the effects of the mechanical properties of high-strength reinforcement on the seismic behavior of concrete walls. Two large-scale T-shaped structural walls were subjected to reversed cyclic loading to evaluate the influence of the uniform and fracture elongation, the yield strength and the tensile-to-yield strength ratio of high-strength reinforcement on the deformation capacity of concrete walls. The primary variables were the nominal yield strength of the reinforcement (Grades 100 and 120 [690 and 830 MPa]), and the tensile-to-yield strength ratio, nominally 1.2 or 1.3. These data were recorded as part of the following research project: Burgos, E. A., Lequesne, R. D., and Lepage, A., “Earthquake-Resistant T-Shaped Concrete Walls with High-Strength Steel Bars,” SM Report No. 142, The University of Kansas Center for Research, Inc., Lawrence, KS, August 2020, 330 pp. https://iri.ku.edu/sites/iri.ku.edu/files/files/pdf/SM142b.pdf and
http://hdl.handle.net/1808/30768