Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/10956
Title: Evaluation of seismic demand for substandard reinforced concrete structures
Authors: Kyriakides, Nicholas 
Ahmad, Sohaib 
Pilakoutas, Kypros 
Neocleous, Kyriacos 
Chrysostomou, Christis 
Tantele, Elia 
Votsis, Renos 
Keywords: Seismic demand predictions;Capacity-demand diagram methods;Degrading systems;Energy balance;Hysteretic behaviour;Cyclic
Category: Civil Engineering
Field: Engineering and Technology
Issue Date: 15-Feb-2018
Publisher: Bentham Science Publishers B.V.
Source: Open Construction and Building Technology Journal, 2018, Volume 12, Pages 9-33
DOI: http://dx.doi.org/10.2174/1874836801812010009
Abstract: Background: Reinforced Concrete (RC) buildings with no seismic design exhibit degrading behaviour under severe seismic loading due to non-ductile brittle failure modes. The seismic performance of such substandard structures can be predicted using existing capacity demand diagram methods through the idealization of the non-linear capacity curve of the degrading system, and its comparison with a reduced earthquake demand spectrum. Objective: Modern non-linear static methods for derivation of capacity curves incorporate idealization assumptions that are too simplistic and do not apply for sub-standard buildings. The conventional idealisation procedures cannot maintain the true strength degradation behaviour of such structures in the post-peak part, and thus may lead to significant errors in seismic performance prediction especially in the cases of brittle failure modes dominating the response. Method: In order to increase the accuracy of the prediction, an alternative idealisation procedure using equivalent elastic perfectly plastic systems is proposed herein that can be used in conjunction with any capacity demand diagram method. Results: Moreover, the performance of this improved equivalent linearization procedure in predicting the response of an RC frame is assessed herein. Conclusion: This improved idealization procedure has been proven to reduce the error in the seismic performance prediction as compared to seismic shaking table test results [1] and will be further investigated probabilistically herein.
URI: http://ktisis.cut.ac.cy/handle/10488/10956
ISSN: 18748368
Rights: © 2018 Kyriakides et al.
Type: Article
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