| 摘要 |
<p>The bridge has a support structure incorporating two or more single-span girder grids set together lengthways, with main girders each mounted on two supports, together with a plate covering the main girder of one span, and a roadway covering on this. The plates (9, 10) for adjacent spans are continuously coupled together along the edges running across the bridge length, by a fishplate joint which is rigid in relation to standard and thrust forces in the connecting plane, but resilient in relation to transverse forces and bending moment at right angles to this. The main girders of one single-span grid (2, 3), at least, are movable on the supports (1) lengthways along the line of the bridge.</p> |
