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Tough combined bridge deck composed of cold-bent Z-shaped steel

A combined bridge and cold bending technology, applied in bridges, bridge parts, bridge materials, etc., can solve problems such as increasing the repair and maintenance costs of bridge structures, affecting the corrosion resistance and durability of bridge decks, and affecting structural fatigue performance. The processing process is simple and efficient, the effect of blocking the steel and the external environment, and reducing the cost of materials

Active Publication Date: 2021-01-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Tough combined bridge deck composed of cold-bent Z-shaped steel
  • Tough combined bridge deck composed of cold-bent Z-shaped steel
  • Tough combined bridge deck composed of cold-bent Z-shaped steel

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Embodiment Construction

[0034] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 and figure 2 As shown, a ductile composite bridge deck composed of cold-formed Z-shaped steel includes the following components: cold-formed and curled Z-shaped steel 1, transverse steel bar 2, and ultra-high toughness concrete 4.

[0036] Such as image 3 As shown, the cold-formed and curled Z-shaped steel 1 is continuously placed side by side along the transverse direction of the bridge deck, and the adjacent shaped steel 1 is welded by two fillet welds 3 to form the steel skeleton of the bridge deck. 5 is the longitudinal direction of the bridge deck.

[0037] Such as Figure 4 As shown, the lower flange of the cold-formed Z-shaped steel 1 is longer, which plays the role of external reinforcement of the plate surface; the upper flange of the cold-formed Z-shaped steel 1 is shorter and has a row of round holes on it. , t...

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Abstract

The invention discloses a tough combined bridge deck composed of cold-bent Z-shaped steel. The tough combined bridge deck comprises cold-bent curled Z-shaped steel, transverse reinforcing steel bars and ultrahigh-toughness concrete. And the cold-bent Z-shaped steel is transversely and continuously placed along the bridge deck and forms bridge deck steel framework through fillet weld welding. The lower side flange of the cold-bent Z-shaped steel is long and plays a role in reinforcing the outer side of the plate surface; the upper side flange is short and is provided with a row of circular holes, and the transverse reinforcing steel bars penetrate through the cold-bent Z-shaped steel flanges through the circular holes. And the ultrahigh-toughness concrete is poured on the bridge deck steelskeleton to play a role in protecting the 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 generated or only generated, and the toughness and durability of the structure are improved; the construction mode of combining the cold-bent Z-shaped steel and the transverse reinforcing steel bars replaces the anti-shearing and anti-pulling effects of studs, meanwhile, the out-of-plane stability of the bridge deck slab is improved, the material cost 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 ductile composite bridge deck composed of cold-formed Z-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 constr...

Claims

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Application Information

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IPC IPC(8): E01D19/12C04B28/00E01D101/26
CPCC04B28/00E01D19/125E01D2101/266C04B18/08C04B18/146C04B18/141C04B14/106
Inventor 徐世烺童精中李庆华
Owner ZHEJIANG UNIV
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