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| Seismic residual deformation control for RC frame structures based on a novel self-centering friction damping brace |
| BI Zhongjun, HU Zhiqiang, WANG Qi, HU Xiaobin |
| School of Civil Engineering, Wuhan University, Wuhan 430072, China |
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Abstract Utilizing the Cu-Al-Be alloy wires, a novel self-centering friction damping brace was developed in this paper. The hysteresis performance of the brace was studied experimentally and the corresponding numerical analysis model was established on the OpenSEES platform. Finally, the brace was applied to control the residual deformation of reinforced concrete (RC) frame structures under seismic excitations. The results show that, as the friction force increases, the brace achieves a better energy dissipation capacity while having larger residual displacement. The hysteresis curves computed using the OpenSEES analysis model agree well with the test ones, indicating that the established analysis model has a fairly good accuracy. In addition, it can cost-effectively mitigate the residual displacements of the RC frame structure under seismic excitations on the whole by installing the proposed braces at the storeys where the residual displacements are relatively larger.
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Received: 21 January 2019
Published: 28 July 2020
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