Tenth U.S. National Conference on Earthquake Engineering Frontiers of Earthquake Engineering July 21-25, 2014 Anchorage, Alaska 10NCEE DUCTILE DESIGN OF SLENDER REINFORCED CONCRETE STRUCTURAL WALLS Sriram Aaleti 1 , Hongbo Dai 2 and Sri Sritharan 3 ABSTRACT Slender reinforced concrete structural walls are commonly used in mid- to high-rise buildings as a main lateral load resisting element in earthquake regions. Past research has shown these walls to be efficient and effective in limiting the building lateral drifts due to their large in-plane stiffness. However, the damage sustained by concrete walls in recent earthquakes have demonstrated that current design requirements of these walls may need modifications, which is further supported by a NEES experimental study completed on slender concrete walls. To further understand the behavior of concrete walls and address the shortcomings of the current design requirements, an analytical study was conducted on slender rectangular concrete walls designed according to ACI 318-11. First, a simplified computational method to estimate force-displacement response of a structural wall, utilizing the moment-curvature relationship, was developed and validated using experimental data. Next, the influence of the following six design parameters on the structural behavior of slender rectangular walls was investigated: aspect ratio; longitudinal reinforcement ratio; volume ratio of spiral reinforcement in wall boundary elements; length of confined wall boundary elements; axial loading ratio; and distribution of longitudinal reinforcement. The results of the analytical study found that the current code requirements for boundary element length and amount of the transverse reinforcement are not sufficient and need to be increased for improved performance. More details of the analysis and design recommendations to improve the performance of concrete walls are presented in this paper. 1 Assistant Professor, Dept. of Civil, Construction & Environmental Engineering, University of Alabama, Tuscaloosa, AL 35487; Email: [email protected] 2 Graduate Student Researcher, Dept. of Civil Engineering, University of Delaware 3 Professor, Dept. of Civil, Construction & Environmental Engineering, Iowa State University, Ames, IA, 50011 Aaleti. S, Dai. H., and Sritharan, S. Ductile Design Of Slender Reinforced Concrete Structural Walls. Proceedings of the 10 th National Conference in Earthquake Engineering, Earthquake Engineering Research Institute, Anchorage, AK, 2014. DOI: 10.4231/D3B853J5Q
DUCTILE DESIGN OF SLENDER REINFORCED CONCRETE STRUCTURAL WALLS
May 19, 2023
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