Retard-bonded shear nail, steel-concrete composite beam and construction method of steel-concrete composite beam
A shear nail and slow bonding technology, applied in bridges, structural elements, bridge parts, etc., can solve the problem of reducing the introduction of concrete prestress, and achieve the effect of convenient and simple construction, avoiding cumbersome procedures, and reliable construction quality.
Pending Publication Date: 2020-09-15
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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[0007] The object of the present invention is to overcome the defects of the prior art and provide a slow bonding shear nail with reasonable structure, outstanding stress performance, wide adaptability, convenient and flexible operation, and excellent economy. It not only ensures the real combined force of steel plate and concrete, but also solves the problem of the reduction of the negative moment concrete prestress introduction degree of steel-concrete composite beams
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] like Figure 1-Figure 3 , Embodiment 1 of the present invention provides a slow bonding shear stud, including a sleeve 1 and a stud welding stud 2, the sleeve 1 includes a cylinder body 3 and an upper cover 4, and the upper cover 4 and the cylinder body 3 Threaded connection, the upper cover 4 is located at the top of the cylinder body 3, the cylinder body 3 and the upper cover 4 form a storage cavity, the storage cavity is filled with slow-bonding adhe...
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The invention provides a retard-bonded shear nail. The retard-bonded shear nail comprises a sleeve and a stud welding nail; the sleeve comprises a barrel and an upper cover; a containing cavity is defined by the barrel and the upper cover; the containing cavity is filled with a retard-bonded adhesive; the stud welding nail comprises a welding part welded to a steel structure and a coating part extending into the barrel and coated with the retard-bonded adhesive, and the coating part blocks the barrel. The invention further provides a steel-concrete composite beam; the steel-concrete compositebeam comprises a steel structure, a concrete plate, a plurality of prestressed steel strands and the retard-bonded shear nails; the prestressed steel strands are tensioned in the concrete plate; the steel structure supports the concrete plate; and the retard-bonded shear nails are welded to the steel structure and poured in the concrete plate. The invention further provides a construction method of the steel-concrete composite beam. The construction method comprises the following steps that: S1, the steel structure is erected; S2, the stud welding nails are welded to the steel structure, and the sleeves of the retard-bonded shear nails are installed; S3, the concrete plate is poured on the steel structure; S4, the prestress of a hogging moment area is tensioned; and S5, a user waits for the curing of the retard-bonded adhesive.
Description
technical field [0001] The invention relates to the field of steel-concrete composite beams, in particular to a slow bonded shear nail, a steel-concrete composite beam and a construction method thereof. Background technique [0002] Shear connectors are key elements in steel-concrete composite beams to ensure that steel and concrete work together. Shear studs are currently commonly used shear connectors, and their main function is to resist shear (shear) and pull (lift) between steel beams and concrete beams. The concrete part in the negative bending moment area may generate tensile stress, which will cause the concrete slab to crack and affect the durability of the bridge. Usually, measures such as prestressing are applied in the negative bending moment area to control cracks, but the steel beam absorbs part of the prestress through the combined action, reducing the introduction of prestress. Therefore, how to increase the prestress introduction degree in the negative mom...
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IPC IPC(8): E01D19/12E04C3/293E01D21/00
CPCE01D19/125E01D21/00E04C3/293
Inventor 陈伟超陈致淳盛康李俊胡振吴转琴
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP