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| Influence of parameters variation on the aseismic performance of a damped outriggers system |
| LIU Liangkun1，PAN Zhaodong1，TAN Ping2，ZHANG Shangrong3 |
1.School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China;
2.Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510405, China;
3.School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China |
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Abstract The finite element vibration equation of a damped outrigger system was deduced to analyse the mitigation performance of the system with the consideration of parameters variation.The “Maxwell type damper calculation method” was proposed to solve the random system seismic response and with the Gauss-Hermite descending dimension algorithm, the influence of the parameters variation on the system damping effects under deterministic and stochastic excitation was investigated.The results show that the Gauss-Hermite descending dimension algorithm has both higher computation efficiency and good accuracy.Under deterministic exercitation, the standard deviations of storey responses of both the traditional outrigger system and the damped outrigger system rise with the variation parameters increasing, and it is rather lower for the damped system.When considering the random exercitation, the damped outrigger system still remains in a good state of seismic mitigation and it is less sensitive to the system parameters variation and is of better robustness.
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Received: 02 September 2019
Published: 28 January 2021
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