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RISS 인기검색어
- 검색키워드
- 저자 : Ahmet Turkeli (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Effect of introducing RC infill on seismic performance of damaged RC frames
Turk, Ahmet Murat,Ersoy, Ugur,Ozcebe, Guney Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.23 No.5
The main objective of this study was to investigate the seismic behavior of damaged reinforced concrete frames rehabilitated by introducing cast in place reinforced concrete infills. Four bare and five infilled frames were constructed and tested. Each specimen consisted of two (twin) 1/3-scale, one-bay and two-story reinforced concrete frames. Test specimens were tested under reversed-cyclic lateral loading until considerable damage occurred. RC infills were then introduced to the damaged specimens. One bare specimen was infilled without being subjected to any damage. All infilled frames were then tested under reversed-cyclic lateral loading until failure. While some of the test frames were detailed properly according to the current Turkish seismic code, others were built with the common deficiencies observed in existing residential buildings. The variables investigated were the effects of the damage level and deficiencies in the bare frame on the seismic behavior of the infilled frame. The deficiencies in the frame were; low concrete strength, inadequate confinement at member ends, 90 degree hooks in column and beam ties and inadequate length of lapped splices in column longitudinal bars made above the floor levels. Test results revealed that both the lateral strength and lateral stiffness increased significantly with the introduction of reinforced concrete infills even when the frame had the deficiencies mentioned above. The deficiency which affected the behavior of infilled frames most adversely was the presence of lap splices in column longitudinal reinforcement.
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Ozge Yilmaz,Ahmet Turkeli,Sebnem Sahin,Hasan Yuksel 대한천식알레르기학회 2014 Allergy, Asthma & Immunology Research Vol.6 No.4
Assessment of asthma control in preschool children is important for therapeutic decisions. Aim of this study was to evaluate the predictive value ofTRACK questionnaire scores for subsequent clinical parameters and to investigate the validity and reliability of the Turkish version of the TRACKquestionnaire. We enrolled 100 children with asthma aged 4 years or younger in this cohort study. We recorded sociodemographic characteristicsand clinical severity parameters. A pediatric allergist filled in the asthma severity scale and the caregiver of the child filled in the TRACK questionnaire. We called in the children again at the end of one month and recorded the same parameters and administered TRACK again. Uncontrolled asthmawas defined as a TRACK score below 80. According to the TRACK score, 65% of the children had controlled asthma initially while at the end ofthe study 64.1% had controlled asthma. At the beginning of the study, all clinical parameters were worse in children with uncontrolled asthma accordingto TRACK score. Similarly, other objective clinical parameters during the following one month period were worse in children with initial uncontrolledasthma. Cronbach’s alpha score for the TRACK questionnaire was 0.84. Turkish TRACK questionnaire is a valid and reliable tool that is predictiveof short term asthma prognosis.
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Hasan Tahsin Öztürk,Erdem Turkeli,Ahmet Durmus 사단법인 한국계산역학회 2016 Computers and Concrete, An International Journal Vol.17 No.4
The main purpose of this study is to perform optimum cost design of cut and cover RC shallow tunnels using Artificial bee colony and genetic algorithms. For this purpose, mathematical expressions of objective function, design variables and constraints for the design of cut and cover RC shallow tunnels were determined. By using these expressions, optimum cost design of the Trabzon Kalekapısı junction underpass tunnel was carried out by using the cited algorithms. The results obtained from the algorithms were compared with the results obtained from traditional design and remarkable saving from the cost of the tunnel was achieved.
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