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RISS 인기검색어
- 검색키워드
- 저자 : Mesut Özdemir (검색결과 2 건)
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Performance Analysis of Steel Structures with A3 Irregularities
Ercan Işık,Mesut Özdemir,İbrahim Baran Karaşin 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.3
Determination of the behaviour of structures during earthquakes is a very important engineering concern. Irregularities in the structure may lead to more damage imposed on it by weakening its defence mechanism during an earthquake. Some of these irregularities may be indentations or protrusions in the plan. Such irregular buildings may be encountered in practice because of various reasons. This study examined the state of irregularity by the A3 plan in the Turkish Building Earthquake Regulation of 2016. Four diff erent A3-type irregularity cases were considered. The building with no irregularities in its plan was taken as the reference building. The fi ve steel structures were compared by obtaining pushover curves for both the X and Y directions. Additionally, as a rapid assessment method, the Canada Seismic Screening Method was used in the study. Both in the rapid assessment method and from the pushover curves, it was determined that buildings without irregularities are safer. The study also allows a comparison among the earthquake performances of the structures using the rapid assessment method. It may be stated that there was an agreement between the two methods. This shows that the rapid assessment method may be used for steel structures. The importance of constructing structures that do not include irregularities is emphasized with the study. If one has to construct such structures, the defence mechanism of the structure should be strengthened by taking various measures.
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Performance Based Assessment of Steel Frame Structures by Different Material Models
Ercan Işık,Mesut Özdemir 한국강구조학회 2017 International Journal of Steel Structures Vol.17 No.3
Acceptable limit conditions for materials used in structures are one of the influential factors for design and evaluation of buildings. These limits are described using different material models. Material models can be generally defined by the stressstrain relationship. Stress-strain relationship varies based on the material. Mathematical models are used for describing the stress-strain relationship for any material. The material model takes a very important role in the seismic analysis of structures. The aim of this study is investigate of effects of steel models on structural performance of steel frame buildings. For this aim, pushover curves were obtained for three different steel models. It was determined that the pushover curves obtained according to three various steel models used in the study were consonant with each other.
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