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Earthquakes and Structures Volume 11, Number 5, November 2016 , pages 823-840 DOI: https://doi.org/10.12989/eas.2016.11.5.823 |
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Experimental research on the propagation of plastic hinge length for multi-scale reinforced concrete columns under cyclic loading |
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Zhenyun Tang, Hua Ma, Jun Guo, Yongping Xie and Zhenbao Li
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| Abstract | ||
| The plastic hinge lengths of beams and columns are a critical demand parameter in the nonlinear analysis of structures using the finite element method. The numerical model of a plastic hinge plays an important role in evaluating the response and damage of a structure to earthquakes or other loads causing the formation of plastic hinges. Previous research demonstrates that the plastic hinge length of reinforced concrete (RC) columns is closely related to section size, reinforcement ratio, reinforcement strength, concrete strength, axial compression ratio, and so on. However, because of the limitations of testing facilities, there is a lack of experimental data on columns with large section sizes and high axial compression ratios. In this work, we conducted a series of quasi-static tests for columns with large section sizes (up to 700 mm) and high axial compression ratios (up to 0.6) to explore the propagation of plastic hinge length during the whole loading process. The experimental results show that besides these parameters mentioned in previous work, the plastic hinge of RC columns is also affected by loading amplitude and size effect. Therefore, an approach toward considering the effect of these two parameters is discussed in this work. | ||
| Key Words | ||
| reinforced concrete column; axial compression ratio; plastic hinge length; loading amplitude; size effect | ||
| Address | ||
| Zhenyun Tang, Hua Ma, Jun Guo, Yongping Xie and Zhenbao Li: The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology. Beijing, 100124, China Yongping Xie: College of Exploration Technology and Engineering ,Shijiazhuang University of Economics, Shijiazhuang,050031, China | ||