Seismic Retrofit of Bridge Steel Truss Piers Using a Controlled Rocking Approach

This paper investigates a seismic retrofit technique that allows bridge steel truss piers to uplift and rock on their foundation. Displacement-based passive energy dissipation devices (buckling-restrained braces, or BRBs) are implemented at the uplifting location to control the rocking response while providing additional energy dissipation. The hysteretic behavior of the controlled rocking system is developed for a static cyclic load applied to the top of a bridge pier, representing the dominant mode of vibration. Some existing methods of analysis are considered in predicting the response of the controlled rocking system in terms of maximum displacements. A capacity-based design procedure is established for sizing the BRBs and a design example provided to illustrate the key steps. Methods to predict design response values (displacements, velocity, forces) are discussed, and a parametric study, based on nonlinear time history analysis, is performed to verify the effectiveness of these methods. The paramete...

[1]  Ioannis N. Psycharis.  Dynamic behavior of rocking structures allowed to uplift , 1981 .

[2]  Mceer,et al.  Recommended LRFD Guidelines for the Seismic Design of Highway Bridges , 2003 .

[3]  Chia-Ming Uang,et al.  Cyclic Testing of Steel-Latticed Members for the San Francisco–Oakland Bay Bridge , 1999 .

[4]  Michel Bruneau,et al.  Ductile Seismic Retrofit of Steel Deck-Truss Bridges. II: Design Applications , 1998 .

[5]  George Deodatis,et al.  Non-stationary stochastic vector processes: seismic ground motion applications , 1996 .

[6]  I M Friedland,et al.  RECOMMENDED LRFD GUIDELINES FOR THE SEISMIC DESIGN OF HIGHWAY BRIDGES , 2002 .

[7]  G. Antaki.  Seismic Design and Retrofit , 2003 .

[8]  Anil K. Chopra,et al.  Dynamics of Structures: Theory and Applications to Earthquake Engineering , 1995 .

[9]  J. W. Meek,et al.  Effects of Foundation Tipping on Dynamic Response , 1975 .

[10]  M H Jones,et al.  SEISMIC RETROFIT OF THE 1927 CARQUINEZ BRIDGE BY A DISPLACEMENT CAPACITY APPROACH , 1997 .

[11]  Michel Bruneau,et al.  Seismic vulnerability evaluation of axially loaded steel built-up laced members II: evaluations , 2008 .

[12]  Michel Bruneau,et al.  Approaches for the Seismic Retrofit of Braced Steel Bridge Piers and Proof-of-Concept Testing of an Eccentrically Braced Frame with Tubular Link , 2005 .

[13]  Nicos Makris,et al.  The rocking spectrum and the limitations of practical design methodologies , 2003 .

[14]  Y Ouyang,et al.  SEISMIC RETROFIT CONCEPTS AND DETAILS FOR LONG-SPAN STEEL BRIDGES , 1997 .

[15]  W. J. Hall,et al.  Earthquake spectra and design , 1982 .

[16]  Y. Wen.  Method for Random Vibration of Hysteretic Systems , 1976 .

[17]  Mervyn J. Kowalsky,et al.  Direct displacement-based seismic design of concrete buildings , 2000 .

[18]  Michel Bruneau,et al.  Seismic vulnerability evaluation of axially loaded steel built-up laced members I: experimental results , 2008 .

[19]  Satoshi Yamada,et al.  EXPERIMENTAL STUDY ON DYNAMIC BEHAVIOR OF UNBONDED-BRACES , 1999 .

[20]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[21]  Chin Tung Cheng,et al.  SEISMIC RESISTANCE OF BRIDGE PIERS BASED ON DAMAGE AVOIDANCE DESIGN , 1997 .

[22]  M. J. N. Priestley,et al.  SEISMIC RESPONSE OF STRUCTURES FREE TO ROCK ON THEIR FOUNDATIONS , 1978 .

[23]  Masayoshi Nakashima,et al.  Strain-Hardening Behavior of Shear Panels Made of Low-Yield Steel. I: Test , 1995 .

[24]  C. V. Anderson,et al.  The Federal Emergency Management Agency (FEMA) , 2002 .

[25]  Stuart S. Chen,et al.  Design and Retrofit Methodology for Building Structures with Supplemental Energy Dissipating Systems , 1999 .

[26]  S. Weissman,et al.  Seismic Retrofit of the Golden Gate Bridge , 1990 .

[27]  Mjn Priestley,et al.  Seismic Design and Retrofit of Bridges , 1996 .

[28]  G. Housner.  The behavior of inverted pendulum structures during earthquakes , 1963 .