Abstract
Past models for the cyclic strength and deformation capacity of reinforced concrete walls are evaluated and new ones are developed using results from 866 wall tests. On the basis of the observed damage, the failure mode is classified into the following categories: in flexure, in diagonal tension, in diagonal compression, or in sliding shear. Among the past models evaluated are those proposed by two of the authors: (a) for the cyclic strength in diagonal tension after flexural yielding or in diagonal compression and (b) for the ultimate chord rotation capacity under cyclic flexure, which were adopted in Eurocode 8-Part 3 and in fib Model Code 2010. Walls with height-to-length ratio <1.2 (“squat”) are considered separately: past models are evaluated and two new ones are proposed on the basis of 321 cyclic tests. Past models for sliding shear strength are modified, using the results from 55 cyclic tests. The predictions for the failure mode and the cyclic strength and/or deformation capacity agree well with the tests.
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Acknowledgments
The research leading to these results receives funding from the Hellenic General Secretariat for Research and Technology under grant ERC-12 of the Operational Program “Education and lifelong learning”, co-funded by the European Union (European Social Fund) and national resources. The data for about 200 “squat” walls were provided by Prof. A.Whittaker, SUNY Buffalo.
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Grammatikou, S., Biskinis, D. & Fardis, M.N. Strength, deformation capacity and failure modes of RC walls under cyclic loading. Bull Earthquake Eng 13, 3277–3300 (2015). https://doi.org/10.1007/s10518-015-9762-x
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DOI: https://doi.org/10.1007/s10518-015-9762-x