Analysis On Mechanical Properties Of Assembly Type Hollow Slab Bridge Loading Transverse Prestress

Among various highway bridges in China, especially small or medium span bridges, fabricated hollow slab bridge is the commonly used form. The traditional precast hollow slab bridge use hinged joint to connect the plate one by one together,the hinged joint transfer the shear between the plates make them subjected to the force together. Under the vehicular load, the hinge joint is broken easyer, when the situation is serious the plate may resists the loads alone, which will cause the plate has a deflection problem, it’s a potential safety hazard to the bridge. So it has great meaning to find out how to avoid the hinged joint crack appear on the bridge, how to improve the bearing capacity and the overall performance of hollow slab bridge.This thesis puts forward a new form of fabricated hollow slab’s horizontal connection with an I-shaped steel. Through using of Ansys, we can establish fabricated hollow slab bridge with hinge joints, and adopt fabricated hollow slab bridge’s space finite element model which is connected with I-shaped steel, using numerical simulation method to analyze the differences of the force performance between the two kinds of spatial conection of fabricated hollow slab bridge when the bridge is skew or straight. We can get the influence to the overall performance of fabricated hollow slab bridge and the bridge’s transverse connection effect, when the bridge use type steel horizontal to connection. Find out a reasonable layout of I-shaped steel and a suitable hollow beam section. The main research contents of this thesis are as follows:(1) This thesis uses the method of equivalent section and the original hinge joint’s Ansys to analyze the model of concrete section of I-shaped hollow slab bridge.Established the bridge 16 m bridge, 8m wide hollow slab gap model and I-shaped steel model, and also we make stress analysis, deformation analysis and lateral load transfer analysis to the whole bridge. Find out a optimal type of steel dimensions and layout. Based on this, we analyze the fabricated hollow slab bridge of 10 meters, 16 meters and 20 meters, and provide the steel industry layout scheme.(2) Checking an I-shaped steel flange concrete local force and space bridge stress analysis under the car loading, the stress of concrete and steel plate does not exceed the limit value specified in the specification, they are all meet the requirements.(3) Considering the calculation results of the whole bridge, to analysis the skew bridge’s stress and the performance of the whole space. Using the same method which used in the previous paper, we can get the steel industry layout scheme to different span, different oblique angle, oblique type hollow slab bridge. At this time, the stress values of concrete and steel plate meet the requirements of the specification.(4) To establish the hollow slab hinge joint model and I-shaped steel model with the establishment of pavement, analysis the influence of two kinds ot model of lateral force transmission capacity of pavement. It shows that when use I-shaped steel to connect the hollow slab bridge, the pavement layer of the bridge deck has a great improvement on the overall performance of the space.