Apparatus for decreasing section force installed between girders in plate girder bridge for reduction of bending moment stress and introduction of re-tension force, and construction method thereof

摘要

The present invention is a plate girder bridge, acting on a plate girders mounted in succession one after another in the longitudinal branch unit In other words the bending moment and to reduce the size of the bending moment acting on the center of the plate girder, mounted to span the negative moment reduction device provided by connecting a certain length of the girder on both sides of which can reduce the size of the section moment of each other, birds to be introduced additionally when there is a need to introduce additional ginjangryeok due to reduction in load carrying capacity of a bridge is installed at regular intervals in a plurality of host center and the bottom bracket installed in the upper abdomen of the two side ends of the plate girders in combination, each supplemental tension bracket as the introduction of the connection installed ginjangryeok hyeonggo strand for reinforcing the load-carrying capacity and reduce the stress resultant acting on the plate girder by installing the stress resultant reduction device consisting of an upward force to the introduction apparatus for introducing a power of up to the girder, ; The consecutive points on top of the pier Mrs. Bell, a plurality of spaced vertical rib on the inside of the inner side of the upper abdomen and the inner flange of the lower plate between the transverse girder to girder and the girder are installed subsequently installed plate unit to be box-shaped plate the inner surface of the stomach and the upper bottom plate extends a distance from the intersection of each installation in contact with the top plate to form a box-shaped plate and the other unit is disposed inside the connecting portion meets an adjacent plate girder and the upper and lower parts of the connecting portion As the steel plate for welded joints or bolts to securely fixed by the anchor bolts to the box-shaped unit with the slab plate, and the unit box plate portion of the inner space in the closet as a urethane foam filled with lead and the upper slab of the box unit plate units of the gap portion of the lower part of the lower flange and the vertical rib provided in the inner portion in the longitudinal direction in the belly of the stud bolt and the adjacent unit is installed after the plate girder is filled with epoxy to closet is installed on the inside at regular intervals a plurality of box-shaped plate Installation close to the top, while the adjacent lower plate installed on the upper and lower plates of the connection of the unit with another box and tighten the bottom flange and the plate is installed and connected by tightening bolts welded or bolted connections, and the abdominal side has a steel plate The face plate is disposed inside the box-shaped unit after the fastening bolt installed at the "L" beams and "L" after the welding of the steel sheet and attached to the inside of the beams in the upper and lower parts of the installation of the steel sheet and a lower flange connected to the bolt the space portion of the plate is filled with lightweight concrete box units, or polyurethane foam and has upper and lower plates of the box-shaped unit is installed at the top and bottom of the vertical flange and connected to each other by fusing the rod after installing multiple anchorage by the X-shaped bracing with parents cement reduction device connected to each other vertically and horizontally adjacent to each of the plate girder is installed a predetermined distance to the continuous spot portions are installed, ; in the stomach, each upper end of both ends of the girder plate unit installed adjacent to the lateral The units are box-shaped bracket against the steel plate at the top and bottom of each meeting bolt connections or welded joints and installing the holder on the outside of the box-shaped bracket inside of the unit and a plurality of host brackets installed on the anchorage cradle attached to the bracket welded to the side of the unit box installing, installed on both sides of the cradle outside the box-shaped bracket and at regular intervals after the neighbor in the central portion of the lower flange of the unit of the lower plate provided in the horizontal girder is installed a plurality of connection provided on the adjacent box-shaped bracket and the lower flange portion and after installation of the anchorage, install attached to one side of the support of the fan shape at regular intervals on the inside at one side of the box-shaped bracket and install a flat forming surface, the groove is formed to combine the supplemental tension bracket attached to the installation saddle support plate Birds Birds installed in the lower part of the anchorage and the bracket is installed on both sides of the upper girder of the host unit and the fixing mount plate girder combine the strands in the tension of the auxiliary saddle bracket installed at regular intervals in the bottom center of the plate girder to combine the supplemental tension bracket Fixed settlement after settlers introduced ginjangryeok to secure the strand installed in the saddle combined with supplemental tension bracket settling on the strand of the host introduced the ginjangryeok bracket by introducing ginjangryeok the rod reduction device of the negative moment after fixing the strand on the installed anchorage and it will install equipment to reduce the stress resultant ginjangryeok to promote the introduction of load carrying capacity of the plate girder bridge.