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Articles & Publications

Advanced use of image analysis and structural monitoring techniques to a series of physical model tests performed at a one degree of freedom force generator.

Advanced use of image analysis and structural monitoring techniques to a series of physical model tests performed at a one degree of freedom force generator.

Abstract. In this study, a review is carried out on the advanced use of image analysis and structural monitoring techniques to a series of physical model tests performed at a one degree of freedom force generator. Several scaled slope models with a variety of specific characteristics have been built and tested, aiming to the investigation of real-time measuring systems and in order to examine the behaviour of the geotechnical constructions when subjected to seismic loading. More specifically the Digital Image Correlation (DIC) technique and the Particle Image Velocimetry (PIV) analysis have been applied on the side face of scaled slope models in order to capture failure mechanisms during seismic loading. Furthermore, optical fibre sensors, recording strain, have been incorporated in the slope models and an accelerometer has been used for the recording of the seismic vibration. The monitoring scheme is presented, the test set up and model making procedure as well as indicative recordings via the utilized techniques. The wide range of applications and the combination of image analysis with other measuring techniques in order to provide comprehensive results about the behavior of the actual geotechnical models is presented. The physical model tests presented in the current study have also high educational interest.

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The behaviour of scaled geotechnical models subjected to seismic loading.

The behaviour of scaled geotechnical models subjected to seismic loading.

Abstract: The purpose of this study was to investigate the behaviour of scaled geotechnical models subjected to seismic loading. Several slope models were built and tested at the APS 400 Electro-Seis force generator, with a variety of specific characteristics and in particular (a) dry or semi-submerged, (b) with steep or minor slope inclination, (c) unreinforced or incorporating soil reinforcement, and (d) incorporating a pipe, aiming to simulate a scaled pipeline. The monitoring tools / methods utilized were (a) optical fibre sensors, aiming to strain recordings inside the slope models (b) the Digital Image Correlation (DIC) technique, in order to capture the failure mechanisms, and (c) accelerometer for the recording of the acceleration levels imposed.

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Rapid  assessment  of  the  seismic vulnerability  of  public  use  buildings.

Rapid assessment of the seismic vulnerability of public use buildings.

The subject of this research is to explore the Rapid assessment of the seismic vulnerability of public use buildings. The method of first degree pre-earthquake control of structures that has been developed in Greece is analyzed. Particular attention is given to the Rapid Visual Control administered by the Anti-Earthquake Planning and Protection Organization in our country

and graphs generated by our involvement with this program are presented. Finally, we briefly evaluate the Rapid Visual Control of Anti-Earthquake Planning and Protection Organization based on real damage data is evaluated.

The aim of this research is to present the available background of the subject of rapid vulnerability assessment of structures and to make conclusions for the further development

that can be realized on the issues of evaluation of the seismic vulnerability of public and

community use buildings in Greece.

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