Tough combined bridge deck slab composed of T-shaped steel

Abstract

The invention discloses a tough combined bridge deck slab system composed of T-shaped steel. The tough combined bridge deck slab system comprises hot-rolled T-shaped steel, transverse steel bars and ultrahigh-toughness concrete. The T-shaped steel is transversely and continuously placed side by side along a bridge deck, and adjacent steel is welded through two fillet welds to form a bridge deck steel framework. The lower side flange of the T-shaped steel is long and plays a role in reinforcing the outer side of the slab surface; the upper side flange of the hot-rolled T-shaped steel is short and is provided with a row of circular holes, and the transverse steel bars penetrate through the flanges of the T-shaped steel through the circular holes. The ultrahigh-toughness concrete is poured onthe bridge deck steel framework to play a role in protecting the bridge deck steel framework. In the combined bridge deck slab system provided by the invention, the ultra-high toughness concrete canensure that tiny cracks of 100 microns or below are not generated or only tiny cracks of 100 microns or below are generated, and the toughness and durability of the structure are improved; the T-shaped steel and the transverse steel bars are combined to replace the anti-shearing and anti-pulling effects of studs, so that the out-of-plane stability of the bridge deck slab is improved, the materialcost and the construction complexity are remarkably 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 tough composite bridge deck made of T-shaped steel. 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 s...

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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