Design of segmental model box for multi-point shaking table tests and its numerical analysis

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (19) : 156-162.

WANG Guobo1， HAO Pengfei2，3, YUAN Mingzhi2， XIE Weiping2

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Abstract

In order to conduct multi-point shaking table tests of underground structure under non-uniform ground motion input, a segmental rigid model box consisting of two active boxes and one driven box was designed. A connecting joint composed of several springs was arranged between active and driven boxes. Acceleration responses of the empty model box and the free field under sinusoidal traveling wave load and different spring stiffness conditions were analyzed, respectively using numerical simulation. Results showed that the spring stiffness of the joint has a significant influence on the acceleration time-history peak value and time-delay at the driven box bottom; adjusting spring stiffness can make the driven box acceleration response peak value, main frequency and time-delay basically meet the target requirements, and verify the feasibility of this model box design scheme.

Key words

multi-point shaking table test / non-uniform input / traveling wave effect / segmental model box

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WANG Guobo1， HAO Pengfei2，3, YUAN Mingzhi2， XIE Weiping2. Design of segmental model box for multi-point shaking table tests and its numerical analysis[J]. Journal of Vibration and Shock, 2020, 39(19): 156-162

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