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Reinforced concrete buildings suffered significant damage in the region affected by the 29 May 2011 earthquake in Simav (Kutahya), Turkey. Typical building damage is classified and potential causes of damage are investigated. Reinforced concrete moment resisting frames with hollow brick infill walls are the most common structural system in and around the Simav city center while masonry construction is common in rural areas. Although the Simav earthquake, with a magnitude of 5.7 to 5.9, can be classified as a moderate earthquake, many buildings experienced damage varying from frequent diagonal cracking and brittle failure of infill walls to collapse or severe damage to frames due to short columns, soft stories or other reasons including insufficient or poor detailing of reinforcement. This study investigates and presents the seismicity of the region, characteristics of the measured ground motions, seismic load demands including response spectra, and damage mechanisms, potential causes and classification of observed damage in reinforced concrete buildings

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ÖZETBu çalışmada hasar verilmiş kemerlere uygulanan değişik FRP ile güçlendirme teknikleri deneysel olarak incelenmiştir. Yedi adet kemer numunesi, pres tuğla ve tarihi yapılardaki harca benzer kireç esaslı düşük dayanımlı harç kullanılarak imal edilmiştir. Yeterli dayanıma ulaşan (28 gün dayanımı) kemerlerden, referans olarak adlandırılan numune göçme anına kadar yüklenmiş, diğer numunelere de belli oranda hasar verilmiştir. Sonra farklı boyutlardaki FRP şeritleri, ankraj uygulamaları ve derz dolgu tekniğini içeren altı farklı güçlendirme tekniği altı kemer numunesi üzerinde teste tabi tutulmuştur. Güçlendirme tekniği uygulanan hasar verilmiş kemer numuneler, ticari bir yapısal analiz programı kullanılarak nümerik olarak modellenmiş ve deneysel sonuçlarla nümerik sonuçlar karşılaştırılmıştır. Elde edilen sonuçlar, güçlendirilmemiş referans numunesine oranla güçlendirilmiş kemer numunesi kapasitesinin en az %58 arttığını ve aynı zamanda kemer derzlerinin yalnızca epoksi reçinesi ile güçlendirilmesinin hasar görmüş tuğla kemer kapasitesini artırmada etkili bir alternatif olduğunu göstermiştir. INVESTIGATION OF FRP EFFECTS ON DAMAGED ARCHES IN HISTORICAL MASONRY STRUCTURES ABSTRACTThe present paper deals with experimental behavior of deformed brick masonry arches strengthened with the fiber reinforced polymer (FRP). Seven arches were fabricated using commercial clay brick and low strength lime-based mortar, trying to mimic historical structures. After reaching sufficient strength (28 day strength), one arch called reference specimen is tested under the ultimate load and other arches are given damage to a certain extent. Then six different strengthening arrangements, including different dimensions of FRP strips, spike anchors and joint grouting are implemented on six arches damaged. The numerical modeling of damaged masonry arches strengthened with FRP is performed using a commercially available structural analysis program and the numerical results are compared with the experimental ones. The experimental results show that the capacity of damaged masonry arch strengthened increases at least 58% in comparison with unstrengthened masonry arches and strengthening of joints with epoxy resin is an effective alternative to increase the damaged masonry arch capacity.

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