Abstract
Based on the comprehensive analysis of various stress research schemes for steel-concrete composite truss joints, the current research status of steel-concrete composite truss joints and epoxy resin concrete at home and abroad are systematically elaborated. The existing problems in the current composite truss joints are analyzed, and possible solutions are proposed. At present, the research on epoxy resin concrete has been very extensive. Epoxy resin concrete has high strength, good toughness, high impact strength, good chemical corrosion resistance, wear resistance, water resistance, frost resistance, tensile resistance and compressive resistance, which make it widely used in engineering. The problem of using epoxy resin concrete instead of ordinary concrete in steel-concrete composite truss is put forward, analyzed and discussed.
Highlights
With the continuous development of our country's economy and building technology, people's requirements for buildings are gradually increasing
The failure modes of lug-plate gusset plate include: (1) concrete cracking in the middle of chord side;(2) Cracks appear in the concrete at the corner contact parts of chord and tension and compression web members;(3): There is a through crack in the concrete at the bottom of the chord between the tension and compression web members
The failure modes of external joints in the main composite truss joints are tearing failure of joint plates at tension web members and buckling deformation of joint plates at compression web members
Summary
With the continuous development of our country's economy and building technology, people's requirements for buildings are gradually increasing. Steel trusses are often used in large-span spaces such as industrial plants, but their high cost will cause unnecessary waste to a certain extent. The structural rigidity is significantly higher than that of steel truss beams, which greatly reduces the engineering cost of truss beams. In the steel-concrete composite truss, the joint area is the key connection area of the members in its structural system, connecting chords and web members, etc. Epoxy resin concrete can replace ordinary concrete in composite trusses, which can further reduce the engineering cost, and can optimize the complex stress situation in the joint area of composite trusses. The author discusses the stress situation of joints of steel-epoxy resin concrete composite trusses by replacing ordinary concrete with epoxy resin concrete
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