Document Type

Structural health monitoring and damage identification paper

Publication details

Chen, XH, Omenzetter, P & Beskhyroun, S 2014, 'Assessment of a segmental post-tensioned box girder bridge using ambient vibration testing', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 1103-1108. ISBN: 9780994152008.

Peer Reviewed

Peer-Reviewed

Abstract

The condition and load carrying capacity of a bridge needs to be properly assessed to operate the structure safely and efficiently. The conventionally utilized static and quasi-static loading tests with weight-controlled heavy trucks have shown distinct limitations in practical applications for the assessment of existing bridges. New and efficient approaches are thus required. In this paper, the assessment of condition and load carrying capacity of the 12-span Newmarket Viaduct, situated in Auckland, New Zealand was conducted using finite element modelling and vibration testing. A finite element model was built to predict the response of the bridge. The ambient vibration testing provided the real properties of the full-scale structure and improved the accuracy of the finite element model of the bridge via model updating process. The significant parameters in calibrating the model were the stiffness of the deck and the boundary conditions at the bearings. The load capacity of the structure was then studied under dead and live loading through the analysis using the calibrated finite element model. The availability of the calibrated, reliable finite element model enhanced the effective structural assessment.

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