Optimal sensor placement in the base-isolated structures subjected to near-fault earthquakes using a novel TTFD approach

Seyed Kazem Sadat Shokouhi; Azam Dolatshah; Hamid Reza Vosoughifar; Yousef Rahnavard; Bijan Dowlatshahi

doi:10.1117/12.2012010

19 April 2013 Optimal sensor placement in the base-isolated structures subjected to near-fault earthquakes using a novel TTFD approach

Seyed Kazem Sadat Shokouhi, Azam Dolatshah, Hamid Reza Vosoughifar, Yousef Rahnavard, Bijan Dowlatshahi

Author Affiliations +

Proceedings Volume 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013; 86924N (2013) https://doi.org/10.1117/12.2012010
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

As a consequence of the ground motions during near-field earthquakes, stronger design and controlling damages of vital structures should be significantly paid attention. Seismic base isolation system is an effective approach for passive protection of structure when an earthquake occurs, because it modifies the structural global response and improves seismic performance. In this study, a Base-Isolated (BI) structure was modeled using Finite Element Method (FEM) in which modal and nonlinear time-history analyses were undertaken using the seismic scaled records of near-fault earthquakes. Furthermore, three various Optimal Sensor Placement (OSP) algorithms were used and Genetic Algorithm (GA) was selected to act as the solution of the optimization formulation. A novel numerical approach was proposed for OSP which was called Transformed Time-history to Frequency Domain (TTFD) algorithm. The TTFD method uses nonlinear time-history analysis results as an exact seismic response despite the common OSP algorithms which utilize modal analysis results. Results show that with a proper OSP method for Structural Health Monitoring (SHM) can detect the weak points of BI structures.

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Seyed Kazem Sadat Shokouhi, Azam Dolatshah, Hamid Reza Vosoughifar, Yousef Rahnavard, and Bijan Dowlatshahi "Optimal sensor placement in the base-isolated structures subjected to near-fault earthquakes using a novel TTFD approach", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86924N (19 April 2013); https://doi.org/10.1117/12.2012010

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