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Health Monitoring of Prestressed concrete structures based on finite element model updating with uncertainty

Biswal, S and Ramaswamy, A (2015) Health Monitoring of Prestressed concrete structures based on finite element model updating with uncertainty. In: 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, SEP 21-23, 2015, Vienna, AUSTRIA, pp. 1447-1456.

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Official URL: http://dx.doi.org/10.1061/9780784479346.170

Abstract

A finite element model updating technique based on measured strain responses is used to monitor the health of prestressed concrete structures. In this work health corresponds to the existing prestressing force present and the associated stiffness properties of the structure. Measurements are taken on post-tensioned beams, both bonded and un-bonded. The measured response is the total strain of the beams at predefined locations and the natural frequencies of the structures. In this work uncertainties in the measured data and those in the stiffness parameters are considered. The uncertainties are modeled using both Bayesian technique and interval analysis. The uncertain parameters in the finite element model are then estimated using Markov chain Monte Carlo technique in Bayesian framework and set inversion via interval analysis in interval analysis framework. The existing prestressing force estimated by both the mentioned techniques are then compared with the measured actual prestressing force present in the structure. To check the robustness of the proposed algorithm tests are conducted at different time spans corresponding to different prestress loss and different material stiffness.

Item Type: Conference Proceedings
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Additional Information: Copy right for this article belongs to the AMER SOC CIVIL ENGINEERS, UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 USA
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 19 Aug 2016 09:43
Last Modified: 19 Aug 2016 09:43
URI: http://eprints.iisc.ernet.in/id/eprint/54302

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