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Earthquakes and Structures Volume 12, Number 1, January 2017 , pages 35-45 DOI: https://doi.org/10.12989/eas.2017.12.1.035 |
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Effect of seismic pounding on buildings isolated by triple friction pendulum bearing |
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Gholamreza Ghodrati Amiri, Ayoub Shakouri, Sajad Veismoradi
and Pejman Namiranian
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| Abstract | ||
| The current paper investigates the effect of the seismic pounding of neighboring buildings on the response of structures isolated by Triple Friction Pendulum Bearing (TFPB). To this end, a symmetric three-dimensional single story building is modeled for analysis with two specified levels of top deck and base deck, to capture the seismic response of the base isolators and building´s roof. Linear elastic springs with different level of gaps are employed to calculate the impact between the buildings. Nonlinear Dynamic Time History Analyses (NDTHA) are conducted for seismic evaluation. Also, five different sizes with four different sets of friction coefficients are assumed for base isolators to cover a whole range of base isolation systems with various geometry configurations and fundamental period. The results are investigated in terms of base shear, buildings&aqute; drift and top deck acceleration of the superstructure. The results also indicate the profound effect of the stiffness of the adjacent buildings on the value of the impact they impose to the superstructure. Also, in situations of potential pounding, the increment of the fundamental period of the TFPB base isolator could intensify the impact force up to nearly five-fold. | ||
| Key Words | ||
| triple friction pendulum bearing; impact; nonlinear dynamic time history analysis; base isolation; pounding | ||
| Address | ||
| Gholamreza Ghodrati Amiri: Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran Ayoub Shakouri, Sajad Veismoradi and Pejman Namiranian: School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran | ||