Shaking table tests for independent stone hoop cave reinforcement model

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (23) : 222-229.

XUE Jianyang1, LING Huaiquan1, ZHOU Hanliang1, ZHANG Fengliang2, ZHAO Xiangbi1

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Abstract

A reinforced mortar belt and other reinforcement technologies were used to strengthen a 1/4 scaled free-standing stone cave dwelling earthquake damage model, and a earthquake simulation shaking table test was performed to study the dynamic responses and seismic performances of the reinforced model. The dynamic characteristics such as natural frequency and damping ratio were obtained by sweeping the white noise. The damage characteristics of the model structure and the dynamic responses such as acceleration and displacement were studied. The experimental research results show that the natural frequency and stiffness of the model structure decrease, the damping ratio increases, and the acceleration amplification factor generally decreases as the peak acceleration of the input seismic wave increases. Under X-direction horizontal earthquake, the acceleration response of the vault on the side of the kiln face is larger than the back wall side vault, and the acceleration response of the middle hole vault is greater than that of the side hole vault. The relative displacement value of the middle cave leg was always higher than that of the side cave leg, and even greater than the top of the side arch. After the earthquake excitation with a peak acceleration of 1.00 g, the maximum shift angles of the top, dome and arch foot of the structure in X direction reached 1/29, 1/229 and 1/201, respectively. Although the local damage of the model was obvious, the overall collapse trend did not appear, indicating that the method proposed in this paper has a significant effect on the reinforcement of the free-standing stone cave dwelling.
Keywords: free-standing stone cave dwelling; damaged model;

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free-standing stone cave dwelling / damaged model;

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XUE Jianyang1, LING Huaiquan1, ZHOU Hanliang1, ZHANG Fengliang2, ZHAO Xiangbi1. Shaking table tests for independent stone hoop cave reinforcement model[J]. Journal of Vibration and Shock, 2022, 41(23): 222-229

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