http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Sevket (검색결과 33 건)
- 무료
- 기관 내 무료
- 유료
-
-
Fragility based damage assesment in existing precast industrial buildings: A case study for Turkey
Sevket Murat Senel,Ali Haydar Kayhan 국제구조공학회 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.34 No.1
In Turkey, majority of industrial facilities are composed of precast buildings. However, precast buildings have suffered extensive damage during Kocaeli and Duzce (1999) and Adana-Ceyhan (1998) earthquakes. Therefore, in this study, fragilities of existing building stock and damage probabilities of precast buildings were studied. For this purpose, building inventories were prepared and variation of structural parameters was determined by investigating the design project of 65 precast buildings constructed in Denizli, Turkey. Twelve analysis models which reflect the stiffness, strength and ductility properties of building inventory were constructed. After the definition of strain based displacement limits and corresponding damage states for buildings, displacement demands were calculated by using non linear time history analysis. During the analyses 360 strong ground motion records were used. Exceedence ratios of concerned damage limits was calculated by checking the displacement demands and then PGV based fragility curves were constructed. Efficiency of strength, stiffness and ductility properties of existing precast buildings were investigated by comparing the fragility curves. The results have shown that the most effective parameters that govern the damage probabilities of precast buildings are stiffness and ductility. It was also stated that the results of fragility analysis and damage and failure observations performed after Kocaeli and Duzce Earthquakes are compatible.
-
-
Effects of soil-structure interaction on construction stage analysis of highway bridges
Sevket Ates,Barbaros Atmaca,Erdal Yildirim,Nurcan Asci Demiroz 사단법인 한국계산역학회 2013 Computers and Concrete, An International Journal Vol.12 No.2
The aim of this paper is to determine the effect of soil-structure interaction and time dependent material properties on behavior of concrete box-girder highway bridges. Two different finite element analyses, one stage and construction stage, have been carried out on Komurhan Bridge between Elazığ and Malatya province of Turkey, over Fırat River. The one stage analysis assume that structure was built in a second and material properties of structure not change under different loads and site conditions during time. However, construction stage analysis considers that construction time and time dependent material properties. The main and side spans of bridge are 135 m and 76 m, respectively. The bridge had been constructed in 3 years between 1983 and 1986 by balanced cantilever construction method. The parameters of soil-structure interaction (SSI), time dependent material properties and construction method are taken into consideration in the construction stage analysis while SSI is single parameter taking into consideration in the one stage analysis. The 3D finite element model of bridge is created the commercial program of SAP2000. Time dependent material properties are elasticity modulus, creep and shrinkage for concrete and relaxation for steel. Soft, medium, and firm soils are selected for evaluating SSI in both analyses. The results of two different finite element analyses are compared with each other. It is seen that both construction stage and SSI have a remarkable effect on the structural behavior of the bridge.
-
Earthquake response of isolated cable-stayed bridges under spatially varying ground motions
Sevket Ates,Kurtulus Soyluk,A. Aydin Dumanoglu,Alemdar Bayraktar 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.31 No.6
A comprehensive investigation of the stochastic response of an isolated cable-stayed bridge subjected to spatially varying earthquake ground motion is performed. In this study, the Jindo Bridge built in South Korea is chosen as a numerical example. The bridge deck is assumed to be continuous from one end to the other end. The vertical movement of the stiffening girder is restrained and freedom of rotational movement on the transverse axis is provided for all piers and abutments. The longitudinal restraint is provided at the mainland pier. The A-frame towers are fixed at the base. To implement the base isolation procedure, the double concave friction pendulum bearings are placed at each of the four support points of the deck. Thus, the deck of the cable-stayed bridge is isolated from the towers using the double concave friction pendulum bearings which are sliding devices that utilize two spherical concave surfaces. The spatially varying earthquake ground motion is characterized by the incoherence and wavepassage effects. Mean of maximum response values obtained from the spatially varying earthquake ground motion case are compared for the isolated and non-isolated bridge models. It is pointed out that the base isolation of the considered cable-stayed bridge model subjected to the spatially varying earthquake ground motion significantly underestimates the deck and the tower responses.
-
Sevket Günes,Basak Cigdem Karacay,Demirhan Diracoglu 국제물리치료연구학회 2022 Journal of International Academy of Physical Ther Vol.13 No.1
Background:The traditional treatment protocol in adhesive capsulitis cases is physical therapy agents and a home exercise program. The extensive majority of patients respond to conservative treatment, but the painful rehabilitation program makes it inconvenient for individuals to fully comply with the treatment. In order to reduce pain and spasm, intraarticular injections or suprascapular nerve block may be effective before the rehabilitation program. Objectives: To investigated the effect of suprascapular nerve block (SNB), which is added to standard physical therapy on pain, functionality and range of motion in patients with adhesive capsulitis (AC). Design: Retrospective study. Methods: This study included 46 patients who were treated for AC. Patients in both groups were given 15 season physical therapy and home exercise. The treatment group consisted of patients who underwent multiple SNB in addition to physical therapy and home exercise. Datas were analyzed retrospectively. Results: The Visual Analogue Scale (VAS), ROM, Shoulder Pain and Disability Index (SPADI) and Constant scores in both groups after treatment and at the third month follow-up (P<.001). In the comparison between the groups, it was determined that the improvement in VAS, ROM and SPADI scores in the treatment group at the 3-month control was statistically significant (P<.05). Conclusion: Multiple SNB added to physical therapy and home exercise program in cases of AC may be effective in terms of pain control, increasing joint range of motion and improving functionality.
-
Investigation of effectiveness of double concave friction pendulum bearings
Sevket Ates 사단법인 한국계산역학회 2012 Computers and Concrete, An International Journal Vol.9 No.3
This paper presents the investigation of the stochastic responses of seismically isolated bridges subjected to spatially varying earthquake ground motions including incoherence, wave-passage and site-response effects. The incoherence effect is examined by considering Harichandran and Vanmarcke coherency model. The effect of the wave-passage is dealt with various wave velocities in the response analysis. Homogeneous firm, medium and soft soil conditions are selected for considering the siteresponse effect where the bridge supports are constructed. The ground motion is described by filtered white noise and applied to each support points. For seismic isolation of the bridge, single and double concave friction pendulum bearings are used. Due to presence of friction on the concave surfaces of the isolation systems, the equation of motion of is non-linear. The non-linear equation of motion is solved by using equivalent linearization technique of non-linear stochastic analyses. Solutions obtained from the stochastic analyses of non-isolated and isolated bridges to spatially varying earthquake ground motions compared with each other for the special cases of the ground motion model. It is concluded that friction pendulum systems having single and double concave surfaces have important effects on the stochastic responses of bridges to spatially varying earthquake ground motions.
-
-
Decoding Turkey's Lust for Regional Clout in the Middle East: A Role Theory Perspective
Sevket Ovah 서울대학교 국제학연구소 2013 Journal of International and Area Studies Vol.20 No.1
This essay examines the domestic and external roots of Turkey's activism in the Middle East through the lens of role theory. Within this context, the essay falls into three sections. In the first part, the conceptual tools that are going to be used in decoding the roots of Turkish activism will be examined. The second section will discuss the national role conceptions of Turkish foreign policy elites for the Middle East, while the third section will examine the expectations of external actors about Turkey's role in the region. In the empirical sections of the essay, the methodology will involve a close examination of both Turkish foreign policy elites' and external actors' speeches, which are assumed to deliver cues about Turkey's role conceptions in the Middle East.
-
Earthquake response of isolated cable-stayed bridges under spatially varying ground motions
Sevket Ates,Kurtulus Soyluk,A. Aydin Dumanoglu,Alemdar Bayraktar 국제구조공학회 2009 Structural Engineering and Mechanics, An Int'l Jou Vol.32 No.1
A comprehensive investigation of the stochastic response of an isolated cable-stayed bridge subjected to spatially varying earthquake ground motion is performed. In this study, the Jindo Bridge built in South Korea is chosen as a numerical example. The bridge deck is assumed to be continuous from one end to the other end. The vertical movement of the stiffening girder is restrained and freedom of rotational movement on the transverse axis is provided for all piers and abutments. The longitudinal restraint is provided at the mainland pier. The A-frame towers are fixed at the base. To implement the base isolation procedure, the double concave friction pendulum bearings are placed at each of the four support points of the deck. Thus, the deck of the cable-stayed bridge is isolated from the towers using the double concave friction pendulum bearings which are sliding devices that utilize two spherical concave surfaces. The spatially varying earthquake ground motion is characterized by the incoherence and wavepassage effects. Mean of maximum response values obtained from the spatially varying earthquake ground motion case are compared for the isolated and non-isolated bridge models. It is pointed out that the base isolation of the considered cable-stayed bridge model subjected to the spatially varying earthquake ground motion significantly underestimates the deck and the tower responses.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
