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PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by: B.H.V. Topping
Seismic Performance Assessment of a Reinforced Concrete Building designed using the Albanian Seismic Code
E. Zhulegu and H. Bilgin
Department of Civil Engineering, Epoka University, Tirana, Albania
E. Zhulegu, H. Bilgin, "Seismic Performance Assessment of a Reinforced Concrete Building designed using the Albanian Seismic Code", in B.H.V. Topping, (Editor), "Proceedings of the Eleventh International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 200, 2012. doi:10.4203/ccp.99.200
Keywords: performance evaluation, 1989 Albanian seismic code, pushover analysis, SAP2000.
During the last two decades, seismic codes in many European countries have been revised and updated after destructive earthquakes . The Albanian seismic code (KTP-89)  is expected to undergo a revision in a near future after the implementation of the adoption to Eurocode norms. However, many existing Albanian reinforced concrete buildings are designed according to this code provisions.
Being a country surrounded with seismically active regions, there is a potential risk for existing reinforced concrete buildings in Albania. The need for a simple and rapid evaluation of existing reinforced concrete building stock is of growing concern to the engineering community . As a result of insufficient lateral load capacity and inadequate deformation capacity of the old buildings, recent earthquakes have caused severe damage to these structures. Performance assessment of the current building stock and estimates their response are vital for decisions regarding the rehabilitation of deficient buildings. Performance based assessment procedures [3,4,5] are commonly accepted as a practical approach to evaluate the seismic capacity of structures.
The study, described in this paper, conducted a seismic performance evaluation for an eight storey reinforced concrete structure representative of late 1990s construction in Albania. Using the same plan area and structural configurations, another imaginary building is designed according to Eurocode 8 and 2 [6,7] standards to make a comparison between the current code and Eurocode regulations. The performance of the existing building is compared with the EC8 code designed building. The structural response is evaluated using pushover analysis with the commercial software SAP2000 .
The performance of an existing reinforced concrete residential building from Albania is evaluated and compared with the performance of the same structure designed according to the EC8 seismic provisions. The inadequacies in detailing are incorporated in the model in the form of moment-rotation properties for the structural elements. The ATC-40 criteria were used to evaluate the seismic performance of the case study buildings. The results of the analysis showed that the performance of the existing building is not satisfactory as a result of the low lateral strength capacity and high drift state demands. The building designed to EC8 code provisions performed satisfactorily. The pushover analysis results indicated a desirable plastic hinge distribution at failure.
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