Nonlinear Dynamic Analysis of a RC Residential Building (Reconan FEA)

This video was developed by Dimitra Gkogkidou (supervisor: Dr G Markou) for the needs of her research work titled "A Case Study of Rehabilitation and Retrofitting of an Earthquake Damaged Reinforced Concrete Structure: Evaluation of the KAN.EPE Design Code Through the Use of 3D Detailed Modeling".

The crack pattern video is presented for the case of the nonlinear dynamic analysis of the initial frame of the real-life RC residential building that was seismically damaged during the earthquake on the 27th of September 2021, Arkalochori, Greece. This is the video that occurred for the case were the building undertakes the earthquake along the x-direction, where the deformations are increased x1000. It is easy to observe the asymmetry and large eccentricities due to the wrong design that was performed in 1985.

Abstract
The purpose of this thesis is the study a real earthquake-damaged building that was affected by the earthquake of Arkalochori on 27.09.2021. It is a two-storey building, constructed in 1985. For the building, a file for a repair permit has been submitted to the Directorate of Natural Disaster Restoration, Greece. The damage to the building's columns has been classified according to Government Gazette 455 B 25.02.2014 and resulted in a loss of load-bearing capacity of more than 60% at the critical ground floor level.
The building will be modelled through the use of FEMAP software and analysed with the ReConAn FEA software, with a nonlinear push-over analysis followed by a time-history analysis using the accelerograms of the main earthquake of magnitude 5.8R and the main aftershock, magnitude 5.3R, which occurred on the 28th September 2021. The purpose of this research work is to study the mechanism that caused these severe damages to the building and investigate what factors and failures in the original design of the building contributed to the development of the damage. A second analysis will explore methods to rehabilitate the building and address all the factors that led to these failures. Finally, the efficiency and accuracy of the regulation will be studied, based on the final numerical results obtained from the 3D detailed finite element analysis that was performed for the needs of this research work. The soil-structure interaction effect will be also taken into account, where an investigation was performed on whether it contributed to the development of the failures.