Study on the Whole Bridge Experiment of Box Girder Prestress Concrete Bridge Without Diaphragm

Zhidian Shahe bridge is a prestress concrete box grider bridge without diaphragm,in order to make sure whether the box girder without diaphragm can deliver loads goodly by changing the conformation of bridge deck to increase the whole structure rigidity,the 35 m simple-span prestress concrete box section with weighless thin web and seal,is applied to simple-beam bridge,under every condition′s whole bridge experiment,the results show that it is feasible to realize transverse connection through the steel bar framework formed by the double layers′ steel bar grid layed on the bridge′s surface spot welding with the extending top of the main beam,and adding steel bars among the wing of box girder and secondary welding plate.