Session

Civil Engineering, Infrastructure and Environment

Description

This paper provides a comprehensive overview of the structural investigations performed on the existing municipal building of Gjakova, intended to be refurbished as part of the Refurbishment project by the European Commission. The municipal building of Gjakova built in the end of 1960s is a reinforced concrete structure with bearing masonry walls which are scattered without any logical pattern. This structural system poses a great challange for the seismic assessment of this building. In order to obtain the confidence factors and the mechanical parameters for the appropriate numerical modeling, a series of structural investigations is carried out in detail. Initially a visual inspection is conducted, and a photographic survey is carried out with a detailed marking of each picture to visualize the building and plan the detailed inspection. The detailed plan is drafted in compliance with the gathered information and the existing documentation, so that maximal information concerned with the structure is acquired with the most minimal interferring. The detailed scrutiny is carried out in a series of frequent site visits and through the help of the measurement techniques a precise geometry is formed which supports the following phases. To obtain the correct mechanical parameters with very few damages to the structural elements a combination of destructive and non-destructive methods is utilized. Reinforced concrete core samples and reinforcement samples are drilled from the structural elements and combined with the rebound hammer measurements, a correlation is formed between these two. The reinforcement is located with the help of the profoscope and a discrepancy between the old drawings and the actual structure is noted. Afterwards, a spreadout testing utilizing the rebound hammer and the profoscope is carried out to achieve the required number of measurements. A compilation of all this information is utilized to assess the structural integrity of the structure and obtain the mechanical parameters. A qualitative measurement is performed for the structural arrangement of the elements and the regularity parameters are assessed as per the Eurocode 8 demands. With the data obtained from the measurements and the testing, reliable mechanical parameters and confidence factors are achieved to form a numerical model which represents appropriately the real building.

Keywords:

structural investigation, non-destructive techniques, refurbishment, retrofitting, reinforced concrete structures;

Session Chair

Muhamet Ahmeti

Session Co-Chair

Bruno Dal Lago

Proceedings Editor

Edmond Hajrizi

ISBN

978-9951-550-19-2

First Page

37

Last Page

43

Location

Pristina, Kosovo

Start Date

26-10-2019 11:00 AM

End Date

26-10-2019 12:30 PM

DOI

10.33107/ubt-ic.2019.182

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Oct 26th, 11:00 AM Oct 26th, 12:30 PM

Structural Investigations for the Refurbishment Project of the Municipal Building of Gjakova

Pristina, Kosovo

This paper provides a comprehensive overview of the structural investigations performed on the existing municipal building of Gjakova, intended to be refurbished as part of the Refurbishment project by the European Commission. The municipal building of Gjakova built in the end of 1960s is a reinforced concrete structure with bearing masonry walls which are scattered without any logical pattern. This structural system poses a great challange for the seismic assessment of this building. In order to obtain the confidence factors and the mechanical parameters for the appropriate numerical modeling, a series of structural investigations is carried out in detail. Initially a visual inspection is conducted, and a photographic survey is carried out with a detailed marking of each picture to visualize the building and plan the detailed inspection. The detailed plan is drafted in compliance with the gathered information and the existing documentation, so that maximal information concerned with the structure is acquired with the most minimal interferring. The detailed scrutiny is carried out in a series of frequent site visits and through the help of the measurement techniques a precise geometry is formed which supports the following phases. To obtain the correct mechanical parameters with very few damages to the structural elements a combination of destructive and non-destructive methods is utilized. Reinforced concrete core samples and reinforcement samples are drilled from the structural elements and combined with the rebound hammer measurements, a correlation is formed between these two. The reinforcement is located with the help of the profoscope and a discrepancy between the old drawings and the actual structure is noted. Afterwards, a spreadout testing utilizing the rebound hammer and the profoscope is carried out to achieve the required number of measurements. A compilation of all this information is utilized to assess the structural integrity of the structure and obtain the mechanical parameters. A qualitative measurement is performed for the structural arrangement of the elements and the regularity parameters are assessed as per the Eurocode 8 demands. With the data obtained from the measurements and the testing, reliable mechanical parameters and confidence factors are achieved to form a numerical model which represents appropriately the real building.