Abstract
This paper proposes an innovative externally-hung self-centering rocking wall (ESRW) structural system for retrofitting existing reinforced concrete structures. Reinforced corbels are installed on the columns of an existing structure to which rocking walls having unbonded post-tensioned tendons are connected using H-shaped connectors. The seismic performance and self-centering ability of the ESRW were investigated through a series of shaking table tests. For comparison, an unretrofit control structure (UCS) was also tested. The UCS was severely damaged under peak ground acceleration (PGA) = 1.2 g test conditions: some reinforcing bars were fractured and the UCS was close to collapse. For the ESRW, the damage was significantly reduced: there were only minor cracks appearing at PGA = 1.5 g test conditions and no damage appeared at the corners of the rocking walls. The maximum story drift and residual deformation of the ESRW were reduced 88% and 92%, respectively, relative to the UCS test. The ESRW structure showed desirable seismic performance and self-centering characteristics during shaking table tests.
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Acknowledgements
This work was financially supported by the National Key Research and Development Program of China (Grant No. 2017YFC0702902). The authors acknowledge Prof. Kent A. Harries from the University of Pittsburgh for his kindly help and contribution.
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Li, X., Zhang, F., Tian, K. et al. Shaking table test for externally-hung self-centering rocking wall structure. Bull Earthquake Eng 19, 863–887 (2021). https://doi.org/10.1007/s10518-020-01010-y
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DOI: https://doi.org/10.1007/s10518-020-01010-y