Browsing by Author "Sezen, Halil"
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Item Seismic performance of masonry buildings during the 2007 Bala, Turkey earthquakes(Springer, 2012-02) Ural, Ali; Sezen, Halil; Angin, Zekai; Doğangün, Adem; Uludağ Üniversitesi/Mühendislik Mimarlık Fakültesi/İnşaat Mühendisliği Bölümü.; 0000-0002-1867-7103; AAR-6126-2020; 6602349830A field investigation was conducted near the town of Bala after two strong earthquakes struck the region on December 20 and 27, 2007. The main objectives of this study are to present the results of the field investigation and examine the characteristics of the recorded ground motions and the corresponding response spectra. The focus of the research was on the causes of damage and failures commonly observed in masonry structures. This study classifies single family masonry dwellings in rural areas and investigates the seismic damage in unreinforced masonry structures. Turkish Earthquake Code requirements for masonry buildings are summarized and compared with the field observations. Our field investigation showed that there has been lack of quality control and regulation for the masonry construction. Diagonal shear cracking and out-of-plane failure were the two major factors that contributed to widespread damage in masonry structures.Item Seismic vulnerability and preservation of historical masonry monumental structures(Techno-Press, 2012-02) Sezen, Halil; Doğangün, Adem; Uludağ Üniversitesi/Mühendislik-Mimarlık Fakültesi/İnşaat Mühendisliği Bölümü.; 0000-0002-1867-7103; AAR-6126-2020; 6602349830Seismic damage and vulnerability of five historical masonry structures surveyed after the 1999 Kocaeli and Duzce, Turkey earthquakes are discussed in this paper. The structures are located in two neighboring cities that have been struck by five very large (M-s >= 7.0) earthquakes during the 20th century alone. Older masonry mosques with arches and domes and their masonry minarets (slender towers) were among the most affected structures in this highly seismic region. While some of the religious and historical structures had virtually no damage, most structures suffered significant damage or collapsed. In the city of Bolu, for example, approximately 600-year-old Imaret, 500-year-old Kadi, 250-year-old Sarachane, and 100-year-old Yildirim Bayezid mosques suffered substantial structural damage after the 1999 earthquakes. Another historical mosque surveyed in Duzce partially collapsed. Most common factors contributing to deterioration of historical structures are also presented. Furthermore, a brief overview of issues associated with analysis and modeling of historical masonry structures is provided.