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Open AccessArticle

Base Pounding Model and Response Analysis of Base-Isolated Structures under Earthquake Excitation

1
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(12), 1238; https://doi.org/10.3390/app7121238
Received: 31 October 2017 / Revised: 26 November 2017 / Accepted: 27 November 2017 / Published: 29 November 2017
In order to study the base pounding effects of base-isolated structure under earthquake excitations, a base pounding theoretical model with a linear spring-gap element is proposed. A finite element analysis program is used in numerical simulation of seismic response of based-isolated structure when considering base pounding. The effects of the structure pounding against adjacent structures are studied, and the seismic response of a base-isolated structure with lead-rubber bearing and a base-isolated structure with friction pendulum isolation bearing are analyzed. The results indicate that: the model offers much flexibility to analyze base pounding effects. There is a most clearance unfavorable width between adjacent structures. The structural response increases with pounding. Significant amplification of the story shear-force, velocity, and acceleration were observed. Increasing the number of stories in a building leads to an initial increase in impact force, followed by a decrease in such force. As a result, it is necessary to consider base pounding in the seismic design of base-isolated structures. View Full-Text
Keywords: base isolation; isolated structure; base pounding model; time-history analysis; seismic response; impact response base isolation; isolated structure; base pounding model; time-history analysis; seismic response; impact response
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MDPI and ACS Style

Liu, C.; Yang, W.; Yan, Z.; Lu, Z.; Luo, N. Base Pounding Model and Response Analysis of Base-Isolated Structures under Earthquake Excitation. Appl. Sci. 2017, 7, 1238.

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