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Shock and Vibration
Volume 2017 (2017), Article ID 2030462, 19 pages
https://doi.org/10.1155/2017/2030462
Research Article

Numerical Study on the Seismic Response of Structure with Consideration of the Behavior of Base Mat Uplift

1Hubei Key Laboratory of Roadway Bridge & Structure Engineer, Wuhan University of Technology, Wuhan 430070, China
2The Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
3Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
4School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China

Correspondence should be addressed to Xian-Feng Ma; nc.ude.ijgnot@am.fx

Received 12 June 2017; Accepted 31 July 2017; Published 3 October 2017

Academic Editor: Xing Ma

Copyright © 2017 Guo-Bo Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The foundation might be separated from the supporting soil if the earthquake is big enough, which is known as base mat uplift. This paper proposed a simplified calculation model in which spring element is adopted to simulate the interaction between soil and structure. The load-deformation curve (- curve) of the spring element can be designated to represent the base mat uplift, in which the pressure can be applied while tensile forces are not allowed. Key factors, such as seismic wave types, seismic wave excitation directions, seismic wave amplitudes, soil shear velocities, structure stiffness, and the ratio of structure height to width (), were considered in the analysis. It is shown that () seismic wave type has significant influence on structure response due to different frequency components it contained; () the vertical input of seismic wave greatly affected structure response in vertical direction, while it has little impacts in horizontal direction; () base mat uplift is easier to take place in soil with higher shear velocity; () structure value has complicated influence on base mat uplift. The outcome of this research is assumed to provide some references for the seismic design of the structure due to base mat uplift.