Steel-UHPC composite structure shear connector and manufacturing and mounting method thereof
A combined structure and connector technology, applied in auxiliary devices, manufacturing tools, bridge parts, etc., can solve the problems of easy cracking of stud caps, insufficient shear strength, low material utilization, etc., and achieve relative slippage of the interface The effect of small quantity, shortening the construction period and simplifying the construction process
Active Publication Date: 2021-01-05
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology
[0008] The technical problem to be solved by the present invention is to provide a traditional stud shear member with insufficient shear strength, weak stud root, low material utilization rate of steel and UHPC, and easy cracking at the stud cap. A steel-UHPC composite structure shear connector with high shear strength, high rigidity, simple construction process, and low engineering cost and its manufacturing and installation method
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[0046] The present invention will be further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.
[0047] For the convenience of description, the relative positional relationship of each component, such as: the description of up, down, left, right, etc., is described according to the layout direction of the drawings in the specification, and does not limit the structure of this patent.
[0048] Such as figure 1 - image 3 As shown, an embodiment of the steel-UHPC composite structure shear connector of the present invention includes four formed steel bars 1 bent from high-ductility hot-rolled ribbed steel bars, and the two ends of the formed steel bars 1 are straight sections 11. The middle part is an arc section 13, the straight section 11 and the arc section 13 are smoothly connected by a transition section 12, and the four formed steel bars 1 are spliced orthogonally to each other to...
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Abstract
The invention discloses a steel-UHPC composite structure shear connector and a manufacturing and mounting method thereof. The steel-UHPC composite structure shear connector comprises four forming steel bars and studs, the two ends of each forming steel bar are arranged to be straight sections, the middle of each forming steel bar is bent to be arc-shaped sections, and the straight sections and thearc-shaped sections are smoothly connected through transition sections; the four forming steel bars are orthogonally spliced to form a square structure, the straight sections of the four forming steel bars are located in the same horizontal plane, the arc-shaped sections of the four forming steel bars are vertically arranged upwards, and the studs are symmetrically arranged at the four corners ofthe inner side of the square structure. A groove with a U-shaped cross section is formed in the upper surface of the steel beam, the straight section of the formed steel bar is arranged in the groove, and the straight section is connected with the steel beam through double-sided groove welding. Firm connection of the steel beam and the UHPC plate can be achieved, and therefore the material characteristics of steel and ultra-high performance concrete can be fully utilized.
Description
technical field [0001] The invention relates to bridge engineering, in particular to a steel-UHPC (Ultra High Performance Concrete) composite structure shear connector and a manufacturing and installing method thereof. Background technique [0002] At present, most long-span bridge structures are steel-concrete composite structures. This structure fully combines the performance of steel bridges and concrete bridges. However, due to the influence of concrete weight, the steel bridge deck is prone to fatigue cracks and cracks under the repeated action of wheel loads. Pavement layer cracking and steel-concrete interface voids and other diseases will affect the safety and service life of the structure. Ultra-high performance concrete (UHPC for short) is a cement-based composite material formulated based on the principle of maximum compactness, which has excellent mechanical properties (compressive strength is generally above 120MPa, tensile strength is generally 7-10MPa) and dur...
Claims
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IPC IPC(8): E01D19/00E01D21/00B23K37/00B23K31/02E01D101/24E01D101/30
CPCE01D19/00E01D21/00B23K37/00B23K31/02E01D2101/24E01D2101/30
Inventor 刘扬曾丹曹磊鲁乃唯陈方怀
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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