Therefore,reinforcement calculation by the current design specification(one-way bending) should be regulated properly to make design of the wall structure more reasonable,perfect,economic and reliable,while the total amount of reinforced bars is not increased.

With the development of our national traffic and transport,the vehicle flowrate increased rapidly and the structure of the vehicle is also changed greatly,it result in the problem of single plank with strength at bridge culvert.

The single plank with strength would reduce the capability of bridge culvert.

The single lining, the combined bearing double-lining and the independent bearing double-lining are discussed.

So in the recent years,the exiting diseases of hinge joints such as the crushing ,abscission and leakage cause the failure of bridge transverse joint,the exiting of the phenomenon of single beam bearing poses great harm to the driving safety of the road.

With the development of transport industry, overweight and overloading vehicles increase rapidly, causing single beam bearing to some extent in some bridges on those highway, which results in crack on deck and serious damage.

The transverse internal force in the flanged top panel of single-box and single-cell reinforced concrete box girders after concrete cracking is discussed, and the nonlinear behavior of the effective distribution width in the panel is presented.