Novel mixed-strength shear-resistant connection joint based on pressure-bearing type high-strength bolts

Abstract

The invention discloses a novel mixed-strength shear-resistant connecting joint based on pressure-bearing type high-strength bolts, and belongs to the technical field of bridge engineering. The novel mixed-strength shear-resistant connecting joint comprises a first steel plate with high section tensile strength and a second steel plate with low section tensile strength, wherein the first steel plate and the second steel plate are fixedly connected through n bolts, the n bolts are sequentially divided into m rows to be arranged from the end, close to the connecting end, of the second steel plate, the number of the bolts arranged in the first row is n1, the number of the bolts arranged in the second row is n2, the number of the bolts arranged in the mth row is nm in proper order, and the number of the bolts arranged in the first row, the second row, ..., to the mth row is monotonically decreased in sequence. According to the novel mixed-strength shear-resistant connecting joint, while the reliability of the to-be-connected steel plate with low section tensile strength is protected, the material utilization rate of the to-be-connected steel plate with high section tensile strength is high; and under the same joint shearing resistance requirement, the utilization rate of the to-be-connected steel plate with high section tensile strength in the novel joint can be increased by 33%.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a novel mixed-strength shear-resistant connection node based on pressure-bearing high-strength bolts. Background technique [0002] The pressure-bearing high-strength bolt connection is one of the commonly used steel shear connection forms at present. The ideal shear connection bearing capacity should mainly come from the pressure of the steel plate hole wall and the shear of the bolt and screw, and try to avoid the form of net section damage, so as to ensure High material utilization and reliable ductility. [0003] In engineering, the problem of overlapping steel materials with different tensile properties of sections often occurs due to different section thicknesses, widths or steel types. Existing pressure-bearing bolted shear connection nodes mostly adopt regular or staggered arrangements. Considering the need to avoid excessive weakening of the cross...

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Problems solved by technology

Existing pressure-bearing bolted shear connection nodes mostly adopt regular or staggered arrangements. Considering the need to avoid excessive weakening of the cross-section caused by the arrangement of too many bolts in a single cross-section of the steel plate with low cross-sectional tensile strength, the single cross-section can The number of bolts to be arranged is limited, and more bolts cannot be reasonably arranged on the steel plate section with high tensile strength to be connected. To make full use of its strong performance, it is often necessary to arrange a long connection area, resulting in low efficiency of steel utilization

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