The problem of seismic protection of short skew two-span highway bridges against the lateral seismic wave is considered. A new concept of seismic protection with the set of rubber bearings and dynamic absorbers is developed. The superstructure is isolated from the ground motion with the set of sliding-less laminated rubber bearings of relatively soft horizontal stiffness. The temporary resonant amplifications in the response of the bridge deck are eliminated by attaching three modal dynamic absorbers to the bottom of the deck. The paper also deals with computer simulation of artificial strong motion earthquake shakings without the "fall-off" effect. The matrix equation of motion of the bridge-dynamic absorbers system excited kinematically, taking into account the time lag resulting from the finite propagation velocity of the seismic wave, has been formulated. The concept of seismic protection has been examined on the exemplary skew bridge using the simulation method.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £65 +P&P)