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Effects of Material Properties on Seismic Vulnerability Assessment of Unreinforced Masonry Buildings

  • Structural Engineering
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Abstract

This study investigates the seismic performance of existing unreinforced masonry buildings considering the effects of different material properties selected from design codes’ assumptions and experimental values. For this purpose, work was conducted to analyze a selection of existing buildings in Albania designed with typical methodologies of the past structural design codes. Experimental investigations were carried out on bricks and mortars extracted from the selected buildings, as well as a series of regular and irregular sized mortar specimens prepared in the laboratory for comparative evaluation purpose. In addition, diagonal compression tests were performed on two full-size (1.2 m × 1.2 m) masonry walls built in the laboratory, which were prepared based on the existing building’s construction method and material properties. Selected typical URM buildings were analyzed with commercial program CDSWin using different masonry mechanical characteristics that were obtained from experimental work in this study. The equivalent frame method (EFM) was used for the modeling of the buildings and pushover analysis was performed to obtain their seismic capacity. To evaluate the seismic response of each case, a comparison was established between the drift ratio and maximum base shear. As a result, using the code assumptions for the mechanical properties of masonry, overly conservative results were obtained. To understand better and clarify how stresses are being distributed in the walls, it is essential to perform experimental investigations to acquire the representative masonry characteristics such that a reliable structure assessment and retrofitting could be implemented.

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Authors and Affiliations

  1. Dept. of Civil and Environmental Engineering, Edinburgh University, Edinburgh, EH9 3FB, UK

    Yavuz Yardim

  2. Dept. of Civil Engineering, Epoka University, Tirana, 1032, Albania

    Enea Mustafaraj & Erion Luga

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  1. Yavuz Yardim
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  2. Enea Mustafaraj
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  3. Erion Luga
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Correspondence to Yavuz Yardim.

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Yardim, Y., Mustafaraj, E. & Luga, E. Effects of Material Properties on Seismic Vulnerability Assessment of Unreinforced Masonry Buildings. KSCE J Civ Eng 24, 1557–1567 (2020). https://doi.org/10.1007/s12205-020-1066-2

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  • DOI: https://doi.org/10.1007/s12205-020-1066-2

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