A Numerical Study on the Strain Based Monitoring Method for Lateral Structural Response of Buildings using FBG Sensors

In this study, the strain based monitoring method to evaluate the lateral structural response of buildings is presented and an applicability of the proposed method is confirmed through the numerical study. It is assumed that the fiber Bragg grating(FBG) strain sensor is employed to measure the strain response of members due to the excellent properties such as multiplexing, and higher sampling frequency. These properties of FBG sensors is proper for buildings the a lot of sensors are required to monitor the reponses of those. FBG sensors measure the strain response of vertical members and are employed to calculate the curvatures of members using the measured strain responses. Then the lateral displacement, and lateral acceleration is evaluated based on the curvatures of vertical members. Additionally, these dynamic responses of buildings are used to evaluate the dynamic properties of buildings such as the natural frequencies and mode shapes using the frequency domain decomposition(FDD) method. Through the application of nine-story steel moment frame example structure, it is confirmed that the proposed method is appropriate to evaluate the lateral structural responses and dynamic properties of buildings.

[1]  J. Hoffman Numerical Methods for Engineers and Scientists , 2018 .

[2]  Hyun Myung,et al.  Vision-based displacement measurement method for high-rise building structures using partitioning approach , 2010 .

[3]  Gangbing Song,et al.  Recent applications of fiber optic sensors to health monitoring in civil engineering , 2004 .

[4]  T. K. Gangopadhyay,et al.  Fibre Bragg gratings in structural health monitoring—Present status and applications , 2008 .

[5]  Hyo Seon Park,et al.  Multi-objective seismic design method for ensuring beam-hinging mechanism in steel frames , 2012 .

[6]  Norris Stubbs,et al.  Damage identification in beam-type structures: frequency-based method vs mode-shape-based method , 2003 .

[7]  Ki-Tae Park,et al.  The determination of bridge displacement using measured acceleration , 2005 .

[8]  김남식,et al.  Estimation of Bridge Deflection Using Fiber Optic Bragg-grating Sensors , 2002 .

[9]  Rune Brincker,et al.  Modal identification of output-only systems using frequency domain decomposition , 2001 .

[10]  Won Seok Chung,et al.  Estimation of Dynamic Displacement and Characteristics of A Simple Beam from FBG Sensor Signals , 2006 .

[11]  Nam-Sik Kim,et al.  Estimation of Displacement Response from the Measured Dynamic Strain Signals Using Mode Decomposition Technique , 2008 .

[12]  Hyo Seon Park,et al.  A wireless vibrating wire sensor node for continuous structural health monitoring , 2010 .

[13]  Jae-Hung Han,et al.  Estimation of dynamic structural displacements using fiber Bragg grating strain sensors , 2007 .

[14]  Kyriacos Kalli,et al.  Fibre Bragg Gratings , 2006 .

[15]  Myung-Hyun Noh,et al.  Performance assessment using the inverse analysis based a function approach of bridges repaired by ACM from incomplete dynamic data , 2010 .