土-相邻结构相互作用子结构振动台试验研究

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Abstract In this paper, the soil-adjacent structure system and the soil-monomer structure system were studied.Based on the shaking table and the substructure test technique, the branch mode method was introduced into the test.The numerical calculation of foundation soil substructure and the physical test of the upper model structure were analyzed by using the interaction coupling terms between the multiple substructures.Thus the shaking table test of the substructure considering the effect of soil-adjacent structure interaction (SASI) and soil-structure interaction (SSI) was carried out.Taking the soil-adjacent structure system composed of two identical four-story steel frame structures and foundation soil as an example, the variation law of the acceleration amplification coefficient of the model structure under various earthquake actions was discussed, and the top displacement, acceleration and bottom shear of the model structure in the soil-monomer structure system and the soil-adjacent structure system were compared and analyzed.The influence of the SASI effect on structural dynamic response was studied.The results show that, compared with the soil-monomer structure system, the SASI effect makes the peak value of the seismic response of the structure show a downward trend in varying degrees, and the degree of influence is related to the spectrum composition of the seismic wave and the dynamic characteristics of the system itself.

Key words： soil-adjacent structure interaction substructure shaking table test branch mode method coupling term seismic response

Received: 07 August 2018 Published: 15 February 2020

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	HE Tao
	JIANG Nan

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HE Tao,JIANG Nan. A substructure shaking table test of soil-adjacent structure interaction[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(4): 207-214.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I4/207

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