Nikos Lagaros

National Technical University of Athens, Civil Engineering, Faculty Member

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Dr. LAGAROS is an active member of the computational mechanics research community, focusing on (a) nonlinear dynamic analysis of concrete and steel structures under seismic loading, (b) performance-based earthquake engineering, (c) structural design optimization of real-world structures, (d) seismic risk and reliability analysis, (e) soft-computing in structural engineering, (f) fragility evaluation of reinforced concrete and steel structures, (g) inverse problems in structural dynamics, (h) parallel and distributed computing – Grid computing technologies, (i) evolutionary computations, (j) geotechnical earthquake engineering and (k) nano-modelling. Among others, his publication track record includes more than 95 peer reviewed journal paper, 10 books and 25 book chapters while he has presented his work in numerous international venues.
Address: Athens, Attikí, Greece

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Rot Index for Assessing the Torsional Effect on the Seismic Performance of RC Buildings

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2013), 2014

Due to the eccentric setback nature of structures, torsional moments will be induced by a set of ... more Due to the eccentric setback nature of structures, torsional moments will be induced by a set of lateral loads on buildings. Although the effect on the response of reinforced concrete buildings was the subject of intensive research over the last decades still lacks a criterion valid in both elastic and plastic region. In this study a criterion capable of assessing torsional effect is proposed. In order to evaluate the proposed criterion with code provisions, two test examples are considered. A torsionally stiff, mass eccentric one-storey and a fourstorey horizontally irregular building designed according to Eurocode provisions subjected to bidirectional excitation are considered. Nonlinear dynamic analyses are carried out implementing natural record selected for three hazard levels. The performance of the proposed criterion is evaluated and its correlation with other structural response quantities like interstorey drifts, displacements, base torque, shear forces and diaphragm rotation is presented. Through this investigation it was found that the proposed criterion is able to provide a reliable prediction of the magnitude of torsional effects for all test cases considered.

Nikos Lagaros

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