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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.76 No.4
- 발행연도
- 2020.1
- 수록면
- 465 - 477 (13page)
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This paper presents an investigation on the dynamic behavior of SRC columns with built-in cross-shaped steels under impact load. Seven 1/2 scaled SRC specimens were subjected to low-speed impact by a gravity drop hammer test system. Three main parameters, including the lateral impact height, the axial compression ratios and the stirrup spacing, were considered in the response analysis of the specimens. The failure mode, deformation, the absorbed energy of columns, as well as impact loads are discussed. The results are mainly characterized by bending-shear failure, meanwhile specimens can maintain an acceptable integrity. More than 33% of the input impact energy is dissipated, which demonstrates its excellent impact resistance. As the impact height increases, the flexural cracks and shear cracks observed on the surface of specimens were denser and wider. The recorded time-history of impact force and mid-span displacement confirmed the three stages of relative movement between the hammer and the column. Additionally, the displacements had a notable delay compared to the rapid changes observed in the measured impact load. The deflection of the mid-span did not exceed 5.90mm while the impact load reached peak value. The impact resistance of the specimen can be improved by proper design for stirrup ratios and increasing the axial load. However, the cracking and spalling of the concrete cover at the impact point was obvious with the increasing in stiffness.
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참고문헌 (40)
참고문헌 신청
Al-Rifaie, A. / 2017 / Lateral impact response of end-plate beam-column connections / Eng. Struct 151:221~234
Al-Thairy, H. / 2011 / A numerical study of the behaviour and failure modes of axially compressed steel columns subjected to transverse impact / Int. J. Impact Eng 38(8-9):732~744
Briaud, J.L. / 2007 / Introduction to Soil Erosion / Texas A&M University
Cai, J. / 2018 / Dynamic behaviour of axially-loaded RC columns under horizontal impact loading / Eng. Struct 168:684~697
Demartino, C. / 2017 / Response of shear-deficient reinforced circular RC columns under lateral impact loading / Int. J. Impact Eng 109:196~213
Al-Thairy, H. / 2011 / A numerical study of the behaviour and failure modes of axially compressed steel columns subjected to transverse impact / Int. J. Impact Eng 38(8-9):732~744
Briaud, J.L. / 2007 / Introduction to Soil Erosion / Texas A&M University
Cai, J. / 2018 / Dynamic behaviour of axially-loaded RC columns under horizontal impact loading / Eng. Struct 168:684~697
Demartino, C. / 2017 / Response of shear-deficient reinforced circular RC columns under lateral impact loading / Int. J. Impact Eng 109:196~213
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