地震作用下振动台试验刚性模型箱侧壁柔性材料研究

doi:10.13722/j.cnki.jrme.2018.0471

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Abstract The boundary of the model box in shaking table test directly affects the reliability of the test data. Lining the flexible material in the side wall of model box has become an important method to mitigate the boundary effect. A model in terms of concentrated mass to represent the soil-box-flexible material was established based on the principle of mode superposition. A theoretical formula for determining the rational parameters of flexible material parameters for model box was deduced. The influence of elastic modulus，thickness，Poisson?s ratio，density and damping ratio of flexible material was analyzed. When the input wave and the parameters of soil are determined，the parameters of the flexible material are governed by an indefinite equation. With the designated input wave and soil parameters，the error of the optimal elastic modulus of flexible materials is only 3.3% by using the theoretical formula derived in this paper and the numerical calculation. The maximum error of the soil displacement in the free field and in the model box is only 3.7%，showing that the flexible material can significantly weaken the boundary effect of the rigid model box.

Key words： tunnelling engineering geotechnical model test boundary effect flexible material rigid model box shaking table test mode superposition method

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	Articles by authors
	ZHANG Tao
	GAO Bo
	FAN Kaixiang
	ZHENG Qing
	HUANG Haifeng
	SHEN Yusheng
	ZHAO Hongdu

Cite this article:

ZHANG Tao,GAO Bo,FAN Kaixiang, et al. Study on flexible material in the sidewall of rigid model box in shaking table test[J]. , 2018, 37(10): 2415-2424.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0471 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I10/2415

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