Development of a baseline model for a steel girder bridge using remote sensing and load tests

A new skewed two span continuous steel girder bridge was constructed and opened to traffic recently. This bridge uses high performance steel (HPS 100W) in the flanges of the negative moment region over the intermediate pier. For construction verification and long-term structural health monitoring purposes, a finite element (FE) model was developed for the bridge superstructure. Various field tests were performed to verify the model: 1) LiDAR scan, 2) static truck load tests, and 3) Laser doppler vibrometer testing. LiDAR scanner was introduced to gain geometrical information of the bridge in the real world. It was also used to measure girder deflections during load tests. The fundamental frequency of the bridge vibration was obtained by using a Laser doppler vibrometer. Both dynamic and static measurements are then used to update the FE model. This valid bridge superstructure FE model was provided to local DOT bridge engineers with the completion of this study.

[1]  Karl E Barth,et al.  Efficient nonlinear finite element modeling of slab on steel stringer bridges , 2006 .

[2]  E. Caetano,et al.  DYNAMIC TESTS ON A LARGE CABLE-STAYED BRIDGE AN EFFICIENT APPROACH By , 2000 .

[3]  Tommy H.T. Chan,et al.  The use of eccentric beam elements in the analysis of slab-on-girder bridges , 1999 .

[4]  Paul Ziehl,et al.  Structural performance and design evaluation of HPS 70W bridge girders , 2007 .

[5]  James M. W. Brownjohn,et al.  Dynamic Assessment of Curved Cable-Stayed Bridge by Model Updating , 2000 .

[6]  Kaoshan Dai,et al.  Baseline Model Establishment for a Bridge: I. Dynamic Testing , 2011 .

[7]  Wanqiu Liu,et al.  Application of 3D LIDAR Scan of a Bridge under Static Load Testing , 2010 .

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

[9]  Mohsen Shahawy,et al.  Analytical and Field Investigation of Lateral Load Distribution in Concrete Slab-On-Girder Bridges , 2001 .

[10]  Feng Lu,et al.  Nonlinear Finite-Element Analysis for Highway Bridge Superstructures , 2003 .

[11]  Narendra Taly.  Design of Modern Highway Bridges , 1997 .

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

[13]  Charles R. Farrar,et al.  MICROWAVE INTERFEROMETERS FOR NON-CONTACT VIBRATION MEASUREMENTS ON LARGE STRUCTURES , 1999 .

[14]  Paul A. Fuchs,et al.  LASER-BASED INSTRUMENTATION FOR BRIDGE LOAD TESTING , 2004 .

[15]  Elisa D. Sotelino,et al.  Three-dimensional finite element modeling of composite girder bridges , 2006 .

[16]  D. Satpathi,et al.  Dynamic characterization of a long span bridge: A finite element based approach , 1997 .

[17]  Jong-Jae Lee,et al.  Real-Time Displacement Measurement of a Flexible Bridge Using Digital Image Processing Techniques , 2006 .

[18]  Jian Jun Lin,et al.  Nonlinear analysis of composite bridges by the finite element method , 1991 .

[19]  Mounir Mabsout,et al.  FINITE-ELEMENT ANALYSIS OF STEEL GIRDER HIGHWAY BRIDGES , 1997 .

[20]  Jennifer Righman,et al.  Simplified Moment Redistribution of Hybrid HPS 485W Bridge Girders in Negative Bending , 2007 .

[21]  N. E. Shanmugam,et al.  Nonlinear analysis of steel-concrete composite beams curved in plan , 1999 .

[22]  Paul A. Fuchs,et al.  APPLICATIONS OF LASER-BASED INSTRUMENTATION FOR HIGHWAY BRIDGES , 2004 .

[23]  Hani Nassif,et al.  Comparison of laser Doppler vibrometer with contact sensors for monitoring bridge deflection and vibration , 2005 .

[24]  Maria Q. Feng,et al.  Baseline Models for Bridge Performance Monitoring , 2004 .

[25]  Michael J. Chajes,et al.  Experimental Load Rating of a Posted Bridge , 1997 .

[26]  Wei-Xin Ren,et al.  Baseline finite element modeling of a large span cable-stayed bridge through field ambient vibration tests , 2005 .

[27]  Kent Gylltoft,et al.  Improved bridge evaluation through finite element model updating using static and dynamic measurements , 2009 .