Passive hybrid systems for earthquake protection of cable-stayed bridge

The performance of passive hybrid control systems for the earthquake protection of a cable-stayed bridge under real earthquake ground motion is presented. A simplified lumped mass finite-element model of the Quincy Bay-view Bridge at Illinois is used for the investigation. A viscous fluid damper (VFD) is used as a passive supplemental energy dissipation device in association with elastomeric and sliding isolation systems to form a passive hybrid control system. The effects of non-linear viscous damping of the VFD on the seismic response of an isolated cable-stayed bridge are examined by taking different values of velocity exponent of the damper. Further, the influence of a variation in viscous damping on the response of the isolated bridge is also investigated. The seismic response of the bridge with passive hybrid systems is compared with the corresponding response of the bridge with only isolation systems, as well as with the uncontrolled bridge. The results of the investigation show that the addition of supplemental damping in the form of a viscous fluid damper significantly reduces the earthquake response of an isolated cable-stayed bridge. The non-linear viscous damping is found to be more effective in controlling the peak isolator displacement of the isolated bridge while simultaneously limiting the base shear in towers.

[1]  Kyu-Sik Park,et al.  Hybrid seismic protection of cable‐stayed bridges , 2004 .

[2]  Kyu-Sik Park,et al.  Hybrid control systems for seismic protection of a phase II benchmark cable-stayed bridge , 2003 .

[3]  John C. Wilson,et al.  Ambient vibration measurements on a cable-stayed bridge , 1991 .

[4]  Michael C. Constantinou,et al.  EXPERIMENTAL STUDY OF SLIDING ISOLATED STRUCTURES WITH UPLIFT RESTRAINT , 1992 .

[5]  Shih-Po Chang,et al.  Effect of viscous, viscoplastic and friction damping on the response of seismic isolated structures , 2000 .

[6]  Nicos Makris,et al.  Viscous Dampers: Testing, Modeling and Application in Vibration and Seismic Isolation , 1990 .

[7]  N J Gimsing.  ANCHORED AND PARTIALLY ANCHORED STAYED BRIDGES , 1966 .

[8]  Michael C. Constantinou,et al.  Experimental study of seismic response of buildings with supplemental fluid dampers , 1993 .

[9]  R. S. Jangid,et al.  EFFECTIVENESS OF SEISMIC ISOLATION FOR CABLE-STAYED BRIDGES , 2006 .

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

[11]  Kyu-Sik Park,et al.  HYBRID CONTROL STRATEGY FOR SEISMIC PROTECTION OF BENCHMARK CABLE-STAYE BRIDGE , 2002 .

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

[13]  Kyu-Sik Park,et al.  INTEGRATED PASSIVE-ACTIVE SYSTEM FOR SEISMIC PROTECTION OF A CABLE-STAYED BRIDGE , 2003 .

[14]  John C. Wilson,et al.  Seismic isolation of cable‐stayed bridges for near‐field ground motions , 2003 .

[15]  Michael D. Symans,et al.  Fuzzy logic control of bridge structures using intelligent semi‐active seismic isolation systems , 1999 .

[16]  T. T. Soong,et al.  Supplemental energy dissipation: state-of-the-art and state-of-the- practice , 2002 .

[17]  Panos Tsopelas,et al.  Experimental study of bridge seismic sliding isolation systems , 1996 .

[18]  Hirokazu Iemura,et al.  Passive and semi‐active seismic response control of a cable‐stayed bridge , 2002 .

[19]  Dinar Camotim,et al.  GBT-BASED LOCAL AND GLOBAL VIBRATION ANALYSIS OF LOADED COMPOSITE OPEN-SECTION THIN-WALLED MEMBERS , 2006 .

[20]  John C. Wilson,et al.  Modelling of a cable‐stayed bridge for dynamic analysis , 1991 .

[21]  Billie F. Spencer,et al.  “Smart” Base Isolation Strategies Employing Magnetorheological Dampers , 2002 .

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

[23]  Erik A. Johnson,et al.  "SMART" BASE ISOLATION SYSTEMS , 2000 .

[24]  Ahmed M. Abdel-Ghaffar,et al.  SEISMIC ENERGY DISSIPATION FOR CABLE-STAYED BRIDGES USING PASSIVE DEVICES , 1994 .

[25]  Erik A. Johnson,et al.  "Smart" base isolation systems , 2000 .