Seismic Simulation Shaking Table Multidirectional Expansion System

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (8) : 73-77.

CHENG Mai-li, LI Qing-ning, WU Duo, BI Yan-chao, MIAO Ru-song

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Abstract

For the multidimensional multipoint excitation vibration table test research of large span space structure by using single vibration table, put forward seismic simulation shaking table redirection extended system concept. Combined with curved mechanism be able to change the direction of the seismic wave transfer characteristics, make structural dynamic analysis of the shaking table expand system. Based on the multi-point excitation theory, consider the inference of superstructure inertia force to sub-units, the formula of the sub-units of equivalent mass. Under the harmonic load, multidirectional extended system dynamic response analytic expression has given. Studies show that multidirectional extended system can effectively change the peak of seismic wave acceleration, phase and the transfer direction, it is a effective method to achieve the large span structure multipoint excitation test using single shaking table. Examples show that the theory is correct, the method is reliable.

Key words

Shaking table / extended system / multi-dimensional multi-point / curved bar mechanism

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CHENG Mai-li, LI Qing-ning, WU Duo, BI Yan-chao, MIAO Ru-song. Seismic Simulation Shaking Table Multidirectional Expansion System[J]. Journal of Vibration and Shock, 2016, 35(8): 73-77

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