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Title: Seismic isolation of two dimensional periodic foundations

Phononic crystal is now used to control acoustic waves. When the crystal goes to a larger scale, it is called periodic structure. The band gaps of the periodic structure can be reduced to range from 0.5 Hz to 50 Hz. Therefore, the periodic structure has potential applications in seismic wave reflection. In civil engineering, the periodic structure can be served as the foundation of upper structure. This type of foundation consisting of periodic structure is called periodic foundation. When the frequency of seismic waves falls into the band gaps of the periodic foundation, the seismic wave can be blocked. Field experiments of a scaled two dimensional (2D) periodic foundation with an upper structure were conducted to verify the band gap effects. Test results showed the 2D periodic foundation can effectively reduce the response of the upper structure for excitations with frequencies within the frequency band gaps. When the experimental and the finite element analysis results are compared, they agree well with each other, indicating that 2D periodic foundation is a feasible way of reducing seismic vibrations.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4] ;  [5]
  1. University of Houston, Houston, Texas 77004 (United States)
  2. Indian Institute of Technology Bombay, Powai, Mumbai (India)
  3. Beijing Jiaotong University, Beijing (China)
  4. University of Texas, Austin, Texas 78712 (United States)
  5. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
22308572
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CIVIL ENGINEERING; CRYSTALS; EXCITATION; FINITE ELEMENT METHOD; FOUNDATIONS; PERIODICITY; REFLECTION; SEISMIC ISOLATION; SEISMIC WAVES; SOUND WAVES; TWO-DIMENSIONAL CALCULATIONS