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Earthquakes and Structures
  Volume 15, Number 2, August 2018, pages 133-144
DOI: http://dx.doi.org/10.12989/eas.2018.15.2.133
 


Effect of the limiting-device type on the dynamic responses of sliding isolation in a CRLSS
Xuansheng Cheng, Wei Jing, Xinlei Li and Changde Lu

 
Abstract
    To study the effectiveness of sliding isolation in a CRLSS (concrete rectangular liquid-storage structure) and develop a reasonable limiting-device method, dynamic responses of non-isolation, sliding isolation with spring limiting-devices and sliding isolation with steel bar limiting-devices are comparatively studied by shaking table test. The seismic response reduction advantage of sliding isolation for concrete liquid-storage structures is discussed, and the effect of the limiting-device type on system dynamic responses is analyzed. The results show that the dynamic responses of sliding isolation CRLSS with steel bar-limiting devices are significantly smaller than that of sliding isolation CRLSS with spring-limiting devices. The structure acceleration and liquid sloshing wave height are greatly influenced by spring-limiting devices. The acceleration of the structure in this case is close to or greater than that of a non-isolated structure. Liquid sloshing shows stronger nonlinear characteristics. On the other hand, sliding isolation with steel bar-limiting devices has a good control effect on the structural dynamic response and the liquid sloshing height simultaneously. Thus, a limiting device is an important factor affecting the seismic response reduction effect of sliding isolation. To take full advantage of sliding isolation in a concrete liquid-storage structure, a reasonable design of the limiting device is particularly important.
 
Key Words
    sliding isolation; concrete rectangular liquid-storage structure; limiting device; shaking table test; dynamic response
 
Address
Xuansheng Cheng, Wei Jing: Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, 730050, PR China; Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, 730050, PR China
Xinlei Li: Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, 730050, PR China
Changde Lu: The Second Engineering Co., LTD, China Railway 21 Bureau Group Co., LTD, Lanzhou, 730070, PR China
 

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