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논문 기본 정보

자료유형
학술저널
저자정보
Seyed Mehdi Davoodnabi (Islamic Azad University) Seyed Mohammad Mirhosseini (Islamic Azad University) Mahdi Shariati (Anhui University of Technology)
저널정보
국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.40 No.6
발행연도
2021.9
수록면
853 - 868 (16page)

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초록· 키워드

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Steel- concrete composite beams are widely used in the construction of tall building with steel floors. In these floors, the bearing capacity of beams in which the performance of concrete and steel is composite is more than 30% of the same beams with non-composite performance. Fire, especially in buildings, has a devastating effect on the components of the structure including the columns, beams, floors, etc. Also, fire indirectly affects the shear connectors buried in floor concrete and reduces their strength, thus reducing the overall strength of the floor. In this research, the behavior of angle shear connectors as a type of shear connectors used in the steel-concrete composite floor due to temperature increase was investigated numerically. Thermo-mechanical finite element modeling was performed using Abaqus software on push-out samples, and the results have been compared with the results obtained from the laboratory tests. Similar to the laboratory conditions, samples with different dimensions of angle shear connectors were modeled at different temperatures including 25, 550, 700 and 850 degrees Celsius. According to the laboratory process, 24 samples were modeled in Abaqus software thermally. The research results showed that the models made in the software were able to accurately predict the laboratory results including shear strength and slip. It was found that the maximum shear force error between analytical and laboratory results is 21.6% and the minimum shear force error in some samples is near to zero. As the temperature increases, the error rate between the laboratory and analytical results increases. Also, shear connector dimensions, concrete strength and temperature value have direct effect on the final strength of steel-concrete composite floors and load slip diagrams. It was also concluded that increasing the angle height to a certain extent could increase the final shear strength of the steel-concrete floor and increasing the angle height after a certain limit had no effect on increasing the shear strength and results in material loss and uneconomical design. Moreover, results indicated that increasing the temperature up to 850°C leads to reducing the shear strength of the samples by approximately 56%.
#angle shear connector #finite element analysis #elevated temperature #load-slip graphs #push-out tests #steel-concrete composite floor #thermo- mechanical

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참고문헌 (142)

참고문헌 신청
Masoud Abedini / 2021 / Dynamic vulnerability assessment and damage prediction of RC columns subjected to severe impulsive loading / Structural Engineering and Mechanics, An Int＇l Journal 77(4):441~461 dbpia Mahdi Alipour / 2020 / Finite element and experimental method for analyzing the effects of martensite morphologies on the formability of DP steels / Mechanics Based Design of Structures and Machines 48(5):525~541 Crossref Mohammad Mehdi Arabnejad Khanouki / 2011 / Behavior of through Beam Connections Composed of CFSST Columns and Steel Beams by Finite Element Studying / Advanced Materials Research 168-170:2329~2333 Crossref M.M. Arabnejad Khanouki / 2016 / Investigation of through beam connection to concrete filled circular steel tube (CFCST) column / Journal of Constructional Steel Research 121:144~162 Crossref Raguvaran Balasubramanian / 2016 / Study on Behaviour of Angle Shear Connector in Steel-concrete Composite Structures / International Journal of STEEL STRUCTURES 16(3):807~811 Crossref

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