Abstract:
PROBLEM TO BE SOLVED: To provide a placing method and a joint structure dispensing with height adjustment when placing a horizontal member such as a beam or a girder on a predetermined receiving part of a column, a bridge pier, or the like. SOLUTION: Placing side steel plates 3, 4 provided at the predetermined space side ends of girders 1, 2 arranged to face with a predetermined space, so as to project in the longitudinal direction, are placed on a receiving side steel plate 6 provided at the upper end of the bridge pier 5 so as to be orthogonal to the placing side steel plates 3, 4. A hardening material 7 such as concrete is filled between the girders 1, 2 arranged to face each other, so as to integrate the girders 1, 2 with each other. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a novel and improved base isolation structure of a girder bridge and a base isolation structure of an aerial structure, capable of improving the base isolation effect, while maintaining a continuity between bridge girders. SOLUTION: This base isolation structure of the girder bridge 100 is composed of a plurality of piers 120 and a plurality of bridge girders 110 framed on the piers, and is characterized in that a base isolation device 160 is arranged in a joining part between the respective bridge girders and the respective piers, and rigidity and/or yield strength of the respective base isolation devices are adjusted so that a natural period becomes longer in the bridge girder 110e positioned in the center of the girder bridge than the bridge girder 110a positioned in an end part of the girder bridge among the plurality of bridge girders. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a shock absorption device for a structure, which facilitates setting thereof without requiring a setting space for a foundation, a support, etc., by being directly mounted on a bridge girder to be protected, and achieves effective reduction of a load transmitted to a portion to be protected, by absorbing members. SOLUTION: The shock absorption device is provided for the structure such as the bridge girder 11, by arranging a number of the absorbing members each formed of a small-diameter hollow cross-sectional member that is shaped on the premise of axial deformation thereof. Each small-diameter hollow cross-sectional member is subject to working such as notching, slitting, rippling, and corrugation, in a side surface thereof, for adjusting a peak load transmitted from an impact application body to an impact receiving body, and residual displacement of a member main body. The absorbing member formed of the small-diameter hollow cross-sectional member is an empty can 14 of a beverage can, for instance, and the shock absorption device is set up by arranging a number of the empty cans. COPYRIGHT: (C)2007,JPO&INPIT