VIBRATION CONTROL AND VIBRATION ISOLATION STRUCTURE OF REINFORCED CONCRETE ELEVATED BRIDGE

摘要

PROBLEM TO BE SOLVED: To secure the earthquake resistant safety of a concrete elevated bridge used as a railroad bridge or a road bridge, and make the elevated bridge have a function for suppressing a spreading of traffic vibrations, which are caused by trains and vehicles traveling on slabs, over the surrounding ground.;SOLUTION: Gusset plates 6, 7 are installed in a protruded manner across at least two spots opposed in a sloped direction among the legs of bridge legs 1, the heads of bridge legs 1, the middle of beams 2, or the middle of girders 3. Between the opposed gusset plates 6, 7, a brace-type damper 4 having a brace body into which a damper is incorporated is constructed, and both ends of the damper 4 are coupled to the gusset plates 6, 7.;COPYRIGHT: (C)2003,JPO