According to the analysis on the factors causing damage of the hinge joints in hinged voided slab bridges, this article put forward to the plans for strengthening of a bridge under the condition of open to traffic, which include the shear steel and transversly prestressing mothods, and it gives the result evaluation for using the shear steel method.

The paper examines the shearing strength of hinge joints between slab bcams by the principle of the same deflection in slab beam span of semi-wave sine loading and vehicle loading for slab beam in assembly simple slab bridge.

In particular,the hinge joints between the beam and the rubber bearings as the site to connect bridge , which will lead to the injury status of the bridge by the force of change, it is worth attention and study their impact of injury on the bridge.

Based on the experiment of beam using three kinds of hinge joint under different load.

Finite element software is used to establish solid model and do calculations so that the load force of cement concrete overlay of different span hollow slab bridge is analyzed and the analysis and calculations are conducted about the stress influence of different kinds of hinge joint.

Application of new-type hinged joints to the design ofbridges in heavy traffic roads;

In situ test method of equivalent dead-load was used to inspect and verify the structure s performance of a simply supported reinforced concrete single plate beam bridge with 13 meter span before and after warping joint treatment.

Although grillage method is an effective method of analyzing bridge deck,it has not been widely used in analyzing simply-supported hinged joint slab for the restriction of that the traditional method can t be used resonably in simulating the hinged joint.

Based on basic principles of grillage an improved grillage model of making the vertical constraint of cross beam ends couple at the same hinged joint to simulate longitudinal hinged joint was proposed.