A mixed-strength shear connection based on pressure-bearing high-strength bolts

Abstract

The invention discloses a mixed-strength shear connection node based on pressure-bearing high-strength bolts, belonging to the technical field of bridge engineering, which includes a first steel plate with high cross-sectional tensile strength and a second steel plate with low cross-sectional tensile strength, The first steel plate and the second steel plate are fixedly connected by n bolts, starting from the end of the second steel plate close to the connection end, the n bolts are divided into m rows and arranged in sequence, wherein the number of bolts arranged in the first row is n1, the number of bolts in the second row is n2, and so on to the number of bolts in the mth row is nm; the number of bolts set in the first row, the second row... to the mth row decreases monotonically. The invention not only protects the reliability of the steel plates with low section tensile strength to be connected, but also realizes high-efficiency material utilization rate for the steel plates with high section tensile strength to be connected; Connecting steel plates can increase the utilization rate by 33%.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a 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-secti...

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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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