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Proceedings Paper

Optimal sensor placement in the base-isolated structures subjected to near-fault earthquakes using a novel TTFD approach
Author(s): Seyed Kazem Sadat Shokouhi; Azam Dolatshah; Hamid Reza Vosoughifar; Yousef Rahnavard; Bijan Dowlatshahi
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Paper 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.

Paper Details

Date Published: 19 April 2013
PDF: 16 pages
Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86924N (19 April 2013); doi: 10.1117/12.2012010
Show Author Affiliations
Seyed Kazem Sadat Shokouhi, Islamic Azad Univ. (Iran, Islamic Republic of)
Azam Dolatshah, Islamic Azad Univ. (Iran, Islamic Republic of)
Hamid Reza Vosoughifar, Islamic Azad Univ. (Iran, Islamic Republic of)
Yousef Rahnavard, Technische Univ. Braunschweig (Germany)
Bijan Dowlatshahi, Univ. of Minnesota (United States)

Published in SPIE Proceedings Vol. 8692:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013
Jerome Peter Lynch; Chung-Bang Yun; Kon-Well Wang, Editor(s)

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