| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a continued structure of main girders, which can be constituted while reducing negative bending moment based on a dead load to a part where a left span main girder and a right span main girder of a multiple span girder bridge are continued and can effectively prevent a crack due to tensile force applied by the negative bending moment based on a live load after completion. <P>SOLUTION: For the continued structure of main girders, girder ends 3a of a plurality of left span main girders 3 juxtaposed in a bridge width direction and girder ends 3a of a plurality of right span main girders 3 juxtaposed in the bridge width direction are supported on a common bridge footing 2, the girder end of the left span main girder and the girder end of the right span main girder are connected through a connection plate 7 extending over both girder ends at a main girder upper surface side end part 5a of a joint gap 5 formed between both girder ends, they are turned to a non-connected state at the main girder lower surface side end part 5b of the joint gap, the joint gap and the connection plate are buried in concrete 15 and the left span main girder and the right span main girder are continued. <P>COPYRIGHT: (C)2012,JPO&INPIT |
