American Society of Civil Engineers


Structures on Sliding Base Subject to Horizontal and Vertical Motions


by T. C. Liauw, (Reader, Dept. of Civ. & Struct. Engrg., Univ. of Hong Kong, Hong Kong), Q. L. Tian, (Prof., Inst. of Mechanics, Chinese Academy of Sciences, Peking, China), and Y. K. Cheung, F.ASCE, (Prof., Dept. of Civ. & Struct. Engrg., Univ. of Hong Kong, Hong Kong)

Journal of Structural Engineering, Vol. 114, No. 9, September 1988, pp. 2119-2129, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9445(1988)114:9(2119))

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Document type: Journal Paper
Abstract: In this paper particular investigation is directed towards the combined effects of horizontal and vertical motions of real earthquakes to structures resting on sliding base. A simplified method is presented to treat the nonlinear effects of time dependent frictional force of the sliding base as a function of the vertical reaction produced by the foundation. As an example, the El Centro 1940 earthquake record is used on a structural model to show the structural responses due to a sliding base with different frictional and stiffness characteristics. The study shows that vertical ground motion does affect both the superstructure response and the base sliding displacement. Nevertheless, the sliding base isolator is shown to be effective for the reduction of seismic response of a superstructure.


ASCE Subject Headings:
Earthquakes
Friction
Seismic effects
Superstructures
Sliding