Hollow slab bridge structure enhancing transverse rigidity

Abstract

The invention provides a hollow slab bridge structure enhancing transverse rigidity, and belongs to the technical field of bridge engineering. According to the technical method, a transverse bridge direction pre-stress rib pipeline is reserved on a bottom plate of each prefabricated plate. Full hinge joints are arranged between the prefabricated plates, and in other words, the height of the hinge joints is equal to that of the prefabricated plates. Meanwhile, the structure of the full hinge joints makes the interval between the bottoms of the prefabricated plates become larger, so that transverse pre-stress ribs are constructed smoothly. In addition, flat anchorage devices are adopted for the transverse pre-stress ribs, and the requirement for the thickness of the bottom plates of the prefabricated plates can be effectively lowered. By the application of the design method, compared with common hinge joints, the resistance to shearing of the hinge joints is better. In cooperation with the transverse pre-stress ribs, transverse linkage of a hollow slab bridge is further enhanced; meanwhile, the transverse pre-stress ribs can effectively balance transverse bending moment.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and relates to a hollow slab bridge structure with enhanced transverse rigidity. Background technique [0002] The design theory of prefabricated hollow slab bridges mostly adopts the "hinged slab method", that is, the connection between adjacent slabs is regarded as a hinge, and the hinge joint only transmits shear force, while ignoring the complex forces of bending, tension, and shear in the actual hinge joint structure. state. The hinge joints of prefabricated hollow slab bridges in my country generally adopt the structure of shallow hinge joints in the early stage. Practice has proved that the shallow hinge joint structure is seriously damaged, and it is easy to cause the stress on the single plate, which reduces the bearing capacity of the whole bridge and increases the deflection, which seriously affects the safety of driving and the service life of the bridge and culvert. [00...

AI Technical Summary

Problems solved by technology

Practice has proved that the damage of the shallow hinge joint structure is serious, and it is easy to cause the stress on the single plate, which reduces the bearing capacity of the whole bridge and increases the deflection, which seriously affects the safety of driving and the service life of the bridge and culvert.

[0003] In the 1990s, the hinge joints of my country's prefabricated hollow slab bridges gradually adopted the structure of deep hinge joints, which improved the shear performance of the hinge joints to a certain extent, but did not fundamentally solve the problem of hinge joint damage. It is still the weak point of the whole prefabricated hollow slab bridge

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