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

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...

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Bibliographic Details
Published in:Applied sciences 2017-11, Vol.7 (12), p.1238
Main Authors: Liu, Chengqing, Yang, Wei, Yan, Zhengxi, Lu, Zheng, Luo, Nan
Format: Article
Language:English
Subjects:
Acceleration
base isolation
base pounding model
Bearings
Computer simulation
Earthquakes
Energy dissipation
Finite element method
Impact loads
impact response
isolated structure
Mathematical models
Pounding
Rubber
Seismic activity
Seismic design
Seismic engineering
Seismic isolation
Seismic response
Sliding friction
Studies
time-history analysis
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Summary: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.
ISSN:2076-3417
2076-3417
DOI:10.3390/app7121238