Estimation of Whole Building Seismic Response Using Limited Number of Sensors -Verification in Shaking Table Test of Steel High-Rise Building-

Abstract eng:
Structural health monitoring systems of buildings are being developed, in order to evaluate the structural safety and function recover of buildings shortly after an earthquake. However, the applicability of an evaluation method has not been examined in detail for nonlinear deformation of buildings and for the effects of location and the number of sensors in a simulated response. The estimation method according to the mode shape (participation function) based on the design model of a building was applied to a large shaking table test of a 1/3-scale 18-story steel high-rise building in December 2013 at EDefense. In this paper, we can draw our conclusions as follows: 1)The estimated results from 5 sensor points (1, 4, 10, 15 and RFL) correspond approximately to the observed results in the 18-story steel high-rise building specimen up to 0.03 radians of the maximum story drift angle. 2) It is important that sensors should be properly installed on the building by considering the mode shape of the design model in order to evaluate better seismic response. 3) It is true that more sensors give better accuracy in evaluating building response. Especially, more sensors are needed if the building shows strong nonlinearities over 0.02 radians.

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