In order to minish the interbedded shear stress of asphalt paving,3-D finite element model of bridge deck was set up,the influences of load position,steel deck thickness,the open width of U shape rib,asphalt thickness, asphalt modulus,contact condition and heavy load on the longitudinal-transverse shear stresses were analyzed,and the simplified calculation formulae of the stresses were concluded.

The longitudinal and lateral manganin gauges were used to determine the principal stresses in the shocked specimens,the lateral stress and longitudinal stress were measured in the 3～11 GPa range of shock stresses.

Lateral stress and longitudinal stress are calculated in the time response of lateral stimulation at different water level of rectangle Shahe aqueduct,the regularities of distribution is analyzed;horizontal displacements of midspan and 1/4 cross-section are calculated,two values are both small and equivalence.

Testing the vertical stress of railroad by the barkhausen effect;

Furthermore,formulae of vertical stress at cross section and shear stress at contact surface were presented without consideration of gravity.

Studs are welded at both ends of this composite slab to increase the longitudinal shear capacity.