Stud-free tough combined bridge deck slab system

Abstract

The invention discloses a stud-free tough combined bridge deck slab system. The stud-free tough combined bridge deck slab system comprises L-shaped hemming profile steel, longitudinal reinforcing steel bars and ultrahigh-toughness concrete. The L-shaped hemming section steel is continuously arranged side by side in the longitudinal direction of a bridge deck, and adjacent section steel is welded through two fillet welds to form a bridge deck steel framework. A row of circular holes are formed in each L-shaped hemming section steel flange plate, and the longitudinal reinforcing steel bars penetrate through the L-shaped hemming section steel flange plates through the circular holes. And the ultrahigh-toughness concrete is poured on the bridge deck steel skeleton to play a role in protectingthe bridge deck steel skeleton. In the combined bridge deck slab system provided by the invention, the ultra-high toughness concrete can ensure that tiny cracks of below 100 microns are not generatedor only generated under the action of various loads, and the toughness and durability of the structure are improved; the structural mode of combining the L-shaped hemming profile steel and the longitudinal reinforcing steel bars achieves the effective anti-shearing and anti-pulling effects, the effects of studs and transverse reinforcing steel bars are replaced, so that the material cost and the construction complexity are greatly reduced, and the fatigue performance is excellent.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a studless tough composite bridge deck system. Background technique [0002] With the continuous advancement of my country's infrastructure construction process, people realize that the convenience of intra-city traffic and inter-city traffic greatly affects the development of the national economy and social progress; therefore, the country has achieved great development in road and bridge engineering in recent decades . Among them, bridge structures are not only widely used in urban overpasses, subway light rails, high-speed railways, etc., but also in river-crossing and sea-crossing structures. In recent years, with the construction of super-large bridge projects such as the Hong Kong-Zhuhai-Macao Bridge and the Hangzhou Bay Bridge, bridge structures at home and abroad are facing unprecedented opportunities for development. In the construction of bridge structur...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the existing steel-concrete composite bridge deck: First, in order to ensure the sufficient shear connection between steel and concrete and prevent the detachment of the two interfaces, more bolts are usually arranged between the two Nails (playing the dual role of shear resistance and pull resistance), which greatly increases the construction workload, and the fatigue performance of the structure is affected due to the existence of welds; second, the steel deck part of the composite bridge deck usually needs to be welded out of the plane Multiple stiffeners, which also increase the amount of construction and affect the fatigue performance of the structure; third, ordinary concrete materials are prone to cracking under tension, and are sensitive to local defects, and are prone to cracks under long-term loads, causing water and ion erosion, affecting The corrosion resistance and durability of the bridge deck will significantly increase the repair and maintenance costs of the bridge structure, causing a huge waste of manpower and material resources

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