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Investigation of the mechanical characteristics of hollow reinforced concrete columns under impact loading
AbstractIn order to explore the mechanical characteristics of hollow reinforced concrete (RC) columns under impact loading, seven hollow RC column specimens were prepared to perform drop hammer impact tests. Impact force–time, mid‐span displacement–time, and steel bar strain–time curves were recorded, and their crack morphologies were observed. Axial compression tests were performed by a 5000 kN testing machine, and the failure modes and axial force–displacement curves of the specimens were drawn. Finite element model of hollow RC columns under impact loading was developed according to drop hammer test results. The obtained results showed that hollow RC member crack patterns under different impact velocities were mainly consisted of inclined cracks and a combination of inclined and vertical cracks. At constant impact velocity, an increase in concrete strength improved the impact resistance of the specimen while decreasing ductility. Replacing the inner steel cage with the same amount of steel tube increased ductility, but decreased residual load capacity. Finite element simulation results presented good agreement with impact test results.
Investigation of the mechanical characteristics of hollow reinforced concrete columns under impact loading
AbstractIn order to explore the mechanical characteristics of hollow reinforced concrete (RC) columns under impact loading, seven hollow RC column specimens were prepared to perform drop hammer impact tests. Impact force–time, mid‐span displacement–time, and steel bar strain–time curves were recorded, and their crack morphologies were observed. Axial compression tests were performed by a 5000 kN testing machine, and the failure modes and axial force–displacement curves of the specimens were drawn. Finite element model of hollow RC columns under impact loading was developed according to drop hammer test results. The obtained results showed that hollow RC member crack patterns under different impact velocities were mainly consisted of inclined cracks and a combination of inclined and vertical cracks. At constant impact velocity, an increase in concrete strength improved the impact resistance of the specimen while decreasing ductility. Replacing the inner steel cage with the same amount of steel tube increased ductility, but decreased residual load capacity. Finite element simulation results presented good agreement with impact test results.
Investigation of the mechanical characteristics of hollow reinforced concrete columns under impact loading
Structural Concrete
Fei, Honglu (author) / Duan, Guangyan (author) / Zhang, Zhiqiang (author) / Liu, Shuwang (author) / Guo, Jiwei (author)
2025-01-07
Article (Journal)
Electronic Resource
English
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