Seismic Vulnerability Assessment of Historical Unreinforced Masonry Buildings in Osijek using Capacity Spectrum Method

Abstract

The limitation of deformation, the desired level of bearing capacity of the structural elements and the dissipation of the energy produced by an earthquake ensure sufficient bearing capacity, stiffness and ductility of structures. These requirements are met by buildings which are designed and constructed in accordance with the latest technical regulations for buildings exposed to the earthquake. Most of the existing buildings in the city of Osijek do not meet these requirements. It is possible to use a capacity spectrum method for the purpose of considering possible responses of such structures to earthquakes and their estimates of seismic vulnerability. Calculation of seismic vulnerability by this method is based on the expected behavior of the building, obtained by overlapping the demand curve and capacity curve. The performance point is the point at which the capacity curve intersects the reduced response curve, at which capacity and demand are equal. The values of spectral displacement obtained for the performance point of a specific building class are used as the input parameters for the fragility curve for different levels of damage. This method will be applied to the collected database of traditional unreinforced masonry buildings of the city Osijek in Croatia. The database is prepared and the main characteristics of the buildings are processed using geographic information system.

A Contribution to a UHS-Based Seismic Risk Assessment in Croatia—A Case Study for the City of Osijek

“…Analytical methods applied in the territory of the City of Osijek, and based on the structural models and results of dynamic or static analyses, are presented in the works of Galista and Hadzima-Nyarko [60], Hadzima-Nyarko et al [61], and Pavić et al [62].…”

Development of Seismic Vulnerability and Exposure Models—A Case Study of Croatia

“…The first meaningful scientific research, listing and characterization of buildings in Croatia, based on original data and in situ observations, was carried out at the Faculty of Civil Engineering and Architecture in Osijek, as part of the "Earthquake Risk of Urban Areas" project [24][25][26][27][28][29].…”

Structural Analysis of Five Historical Minarets in Bitlis (Turkey)

“…Such works contain information about the social life of the societies of the period and construction technologies. The fact that they have survived over time is an indication that such structures receive outstanding engineering services without any high-level technology [1][2][3]. The protection of cultural heritage and its safe transfer to the future are among essential engineering research and implementation subjects of the 21st century.…”