Seismic protection of the horizontally curved bridge with semi-active variable stiffness damper and isolation system

Seismic vibration due to earthquake can damage the curved bridges that are the main interconnecting component for traffic separation structures of the urban highway system. Failure of bridges during and after a seismic event is vulnerable as bridges are lifeline structures. This work investigates the application of semi-active variable stiffness damper for a seismic control of the horizontally curved bridge isolated with different passive devices. The main objectives of the study are to investigate the effectiveness of the hybrid system and to find the optimum hybrid system for the seismic control of the curved bridge with different control laws of a damper. The selected bridge is a three-span continuous concrete box girder supported on pier and rigid abutment. The bridge deck is modeled as a single spine beam and the supporting pier is modeled as linear lumped mass system. The bridge is excited with four different ground motions having different ground motion characteristics with all three-ground motion components (horizontal as well as vertical). The results of the analysis demonstrate that the use of semi-active variable stiffness damper with different isolators is very effective in controlling the response of the curved bridge. The combination of semi-active variable stiffness damper and lead rubber bearing can provide an effective way for overall seismic control of the curved bridge. The use of modified switching control law for damper is as effective as switching control law with less number of sensors.

[1]  R. S. Jangid,et al.  Seismic behavior of isolated bridges: A-state-of-the-art review , 2003 .

[2]  A. K. Agrawal,et al.  CONTROL OF SEISMICALLY EXCITED CABLE-STAYED BRIDGE USING RESETTING SEMIACTIVE STIFFNESS DAMPERS , 2001 .

[3]  Zexiang Li,et al.  Control of seismic-excited buildings using active variable stiffness systems , 1994, Proceedings of 1994 American Control Conference - ACC '94.

[4]  Xing Jun Qi,et al.  Seismic Mitigation Analysis of Viscous Dampers for Curved Continuous Girder Bridge , 2011 .

[5]  Y. K. Wen,et al.  Random vibration of hysteretic systems under bi‐directional ground motions , 1986 .

[6]  Michael C. Constantinou,et al.  Example of application of response spectrum analysis for seismically isolated curved bridges including soil-foundation effects , 2011 .

[7]  Michael C. Constantinou,et al.  Example of application of response history analysis for seismically isolated curved bridges on drilled shaft with springs representing soil , 2011 .

[8]  R. S. Jangid.  Computational numerical models for seismic response of structures isolated by sliding systems , 2005 .

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

[10]  Ying-Hui Lei,et al.  Applications of LRB and FPS to 3-D Curved Box Bridges , 2004 .

[11]  Andrei M. Reinhorn,et al.  Teflon Bearings in Base Isolation II: Modeling , 1990 .

[12]  Stephen A. Mahin,et al.  A Simple Pendulum Technique for Achieving Seismic Isolation , 1990 .

[13]  Anil K. Agrawal,et al.  APPLICATIONS OF SOME SEMIACTIVE CONTROL SYSTEMS TO BENCHMARK CABLE-STAYED BRIDGE , 2003 .

[14]  Yan XINGHUA.  MODEL AND ANALYSIS OF VARIABLE STIFFNESS SEMI-ACTIVE CONTROL SYSTEM , 1999 .

[15]  Jann N. Yang,et al.  RESETTING SEMIACTIVE STIFFNESS DAMPER FOR SEISMIC RESPONSE CONTROL , 2000 .

[16]  R. S. Jangid,et al.  SEMIACTIVE CONTROL OF SEISMICALLY ISOLATED BRIDGES , 2008 .

[17]  Ian G. Buckle,et al.  Seismic Response of Full and Hybrid Isolated Curved Bridges , 2012 .

[18]  Takuji Kobori,et al.  Active variable stiffness system with non‐resonant control , 2001 .

[19]  R. S. Jangid,et al.  Semi-Active Stiffness Dampers for Seismic Control of Structures , 2007 .

[20]  Marina Daecher.  Design Of Seismic Isolated Structures From Theory To Practice , 2016 .

[21]  R. S. Jangid,et al.  Response of piping system with semi-active variable stiffness damper under tri-directional seismic excitation , 2013 .

[22]  W G Godden,et al.  Seismic response of a curved highway bridge model , 1976 .

[23]  W. H. Robinson,et al.  A LEAD-RUBBER SHEAR DAMPER , 1977 .

[24]  William Robinson,et al.  Lead‐rubber hysteretic bearings suitable for protecting structures during earthquakes , 1982 .

[25]  R. S. Jangid.  Optimum friction pendulum system for near-fault motions , 2005 .

[26]  W. H. Robinson,et al.  High-strain tests on lead-rubber bearings for earthquake loadings , 1984 .

[27]  Toshiro Hayashikawa,et al.  Damage Evaluation of Curved Steel Bridges Upgraded with Isolation Bearings and Unseating Prevention Cable Restrainers , 2009 .

[28]  Li Hui Wang,et al.  Earthquake Damage of Curved Highway Bridges in 2008 Wenchuan Earthquake , 2013 .

[29]  Gregory L Fenves,et al.  BEHAVIOR AND FAILURE ANALYSIS OF A MULTIPLE-FRAME HIGHWAY BRIDGE IN THE 1994 NORTHRIDGE EARTHQUAKE , 1998 .

[30]  Bijan Samali,et al.  Study of a semi-active stiffness damper under various earthquake inputs , 2002 .