Output-Only System Identification of Posttensioned Segmental Concrete Highway Bridges

This paper discusses the application of system identification of a highway bridge using finite-element method and ambient-vibration testing. The posttensioned Gulburnu Highway Bridge located on the Giresun-Espiye state highway was selected as a case study. A finite-element model of the bridge was developed using SAP2000 software, and dynamic characteristics were obtained analytically. During the test, sources of ambient excitations were provided by the traffic effects over the bridge. Ambient-vibration tests were applied to the bridge to identify dynamic characteristics. The selection of measurement time, frequency span, and effective mode number was considered from similar studies in the literature. Two output-only system identification methods, enhanced frequency domain decomposition and stochastic subspace identification, were used to estimate the dynamic characteristics of the bridge experimentally. The accuracy and efficiency of both methods were investigated and compared with finite-element results....

[1]  J. Bendat,et al.  Random Data: Analysis and Measurement Procedures , 1971 .

[2]  Tong Zhao,et al.  Experimental and Analytical Modal Analysis of Steel Arch Bridge , 2004 .

[3]  Jeong-Ho Kim,et al.  Development of a baseline for structural health monitoring for a curved post-tensioned concrete box–girder bridge , 2009 .

[4]  Wei-Xin Ren,et al.  EMD-based stochastic subspace identification of structures from operational vibration measurements , 2005 .

[5]  D. J. Ewins,et al.  Modal Testing: Theory and Practice , 1984 .

[6]  Temel Türker,et al.  Vibration Characteristics of Kömürhan Highway Bridge Constructed with Balanced Cantilever Method , 2009 .

[7]  Rune Brincker,et al.  Using Enhanced Frequency Domain Decomposition as a Robust Technique to Harmonic Excitation in Operational Modal Analysis , 2006 .

[8]  J. Juang.  Applied system identification , 1994 .

[9]  Guido De Roeck,et al.  Reference-based combined deterministic–stochastic subspace identification for experimental and operational modal analysis , 2006 .

[10]  Hong Guan,et al.  Vibration-based structural health monitoring of highway bridges , 2006 .

[11]  Andreas Johann Felber,et al.  Development of a hybrid bridge evaluation system , 1994 .

[12]  B. Peeters,et al.  Reference based stochastic subspace identification in civil engineering , 1999 .

[13]  Ratneshwar Jha,et al.  Real-time wireless vibration monitoring for operational modal analysis of an integral abutment highway bridge , 2009 .

[14]  E. Turiel.  The Development of Morality , 2007 .

[15]  Palle Andersen,et al.  Modal Identification from Ambient Responses using Frequency Domain Decomposition , 2000 .

[16]  Bart Peeters,et al.  System identification and damage detection in civil engineering , 2000 .

[17]  Carmelo Gentile,et al.  Output-only modal identification of a reinforced concrete bridge from radar-based measurements , 2008 .

[18]  Randall J. Allemang,et al.  THE MODAL ASSURANCE CRITERION–TWENTY YEARS OF USE AND ABUSE , 2003 .