Modal testing for a multispan continuous segmental prestressed concrete bridge

Ming L. Wang; Fan Li Xu; Debashis Satpathi; Zhen L. Chen

doi:10.1117/12.348683

18 May 1999 Modal testing for a multispan continuous segmental prestressed concrete bridge

Ming L. Wang, Fan Li Xu, Debashis Satpathi, Zhen L. Chen

Proceedings Volume 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways; (1999) https://doi.org/10.1117/12.348683
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Continuous segmental prestressed concrete bridges have been used extensively all over the world since the late 1960's. In this case the authors are investigating one such bridge in the state of Illinois. The bridge has developed extensive cracks on the webs of the segments. Yet, it is very difficult to assess the safety of this bridge. One of the possible ways of coming up with some quantification involves the estimation of the structural dynamic properties, such as modal frequencies and mode shapes. This approach is especially useful if a previous baseline has already been established for that structure. Such a baseline does exist for the structure. This paper is a summary of the ongoing of experimental investigations and Finite Element simulations that have been conducted on the bridge. In particular, three experimental modes have been identified using both forced vibration and ambient vibration excitation at two different seasons of the year and the results have been compared to results that were obtained by CTL twelve years ago.

Citation Download Citation

Ming L. Wang, Fan Li Xu, Debashis Satpathi, and Zhen L. Chen "Modal testing for a multispan continuous segmental prestressed concrete bridge", Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); https://doi.org/10.1117/12.348683

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