Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheological intelligent isolation system and its key technique

被引：4

作者：

Qu W. ^{[1
]}

Tu J. ^{[1
]}

机构：

[1] Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology

来源：

Frontiers of Architecture and Civil Engineering in China | 2009年 / 3卷 / 1期

基金：

中国国家自然科学基金;

关键词：

Magnetorheological (MR) intelligent isolation system; Neural network; Sliding steel supporting; Three-Gorges ship lift tower; Whipping effect;

D O I：

10.1007/s11709-009-0003-8

中图分类号：

学科分类号：

摘要：

A vertical ship lift under earthquake excitation may suffer from a whipping effect due to the sudden change of building lateral stiffness at the top of the ship lift towers. This paper proposes a roof magnetorheological (MR) intelligent isolation system to prevent the seismic whipping effect on machinery structures. Theoretically, the dynamic models of MR damper and the mechanical model of ship lift was established, the inverse neural network controlling algorithm was proposed and the fundamental semi-active control equation for the Three-Gorges ship lift where the MR intelligent isolation system was installed was deduced. Experimentally, the experimental model of the ship lift was given, the vibrating table experiment of the MR intelligent isolation system controlling the whipping effect was carried out and the results of the inverse neural network control strategy and passive isolation strategy were compared. In practical aspect, the large-scale MR damper (500 kN) and a sliding support with limited stiffness were designed and fabricated. It was proven that the MR intelligent isolation system with proper control strategy can greatly reduce the seismic whipping effect on the top workshop of the ship lift and be simple and effective enough to be applied to real engineering structures. © 2009 Higher Education Press and Springer-Verlag.

引用

页码：32 / 41

页数：9

共 9 条

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