Strengthening Method of Coupling Beam Based on Viscoelastic Material

Abstract

The invention relates to a connecting beam strengthening method based on viscoelastic materials. The components and materials used in the method include steel plates, viscoelastic materials, backing plates and connectors. The viscoelastic material is bonded between the steel plates, and there are bolt holes on the steel plates, and the steel plates and the backing plates are connected to the shear wall limbs on both sides of the connecting beam with connecting pieces. The invention improves the energy dissipation and vibration reduction capacity of the coupling beam without increasing the stiffness of the coupling beam by utilizing the superior energy dissipation capacity of the viscoelastic material and the characteristics of small initial stiffness, thereby reducing the earthquake load and wind load of the entire structure. The lower response overcomes the shortcomings of the existing steel plate reinforcement that increases the stiffness of the coupling beam and poor energy dissipation effect, as well as the poor vibration reduction effect of FRP reinforcement. The invention is applicable to old high-rises and the like that have not considered the anti-seismic design or do not meet the current anti-seismic standards.

Description

technical field [0001] The invention relates to a connecting beam strengthening method based on a viscoelastic material, belonging to the technical field of structural engineering. Background technique [0002] The reinforced concrete shear wall structure occupies an important position in various high-rise structural systems because of its large lateral stiffness and high bearing capacity. Due to the needs of building doors, windows, etc., openings in the shear wall slices often form coupling beams with relatively large heights and spans. As the first line of defense for seismic fortification of shear wall structures, the coupling beams are preceded by rare earthquakes. The shear wall pier yields, and the seismic energy is dissipated through the formation of plastic hinges at the ends of the coupling beams, while the energy dissipation reduces the stiffness and strength of the coupling beams, weakens or even fails the restraint on the shear wall pier, and greatly reduces the...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for strengthening the connecting beam based on viscoelastic materials, which overcomes the existing shortcomings of increasing the stiffness of the connecting beam and poor energy dissipation effect by using steel plates, and improves the efficiency of the connecting beam. Energy-dissipating and vibration-absorbing capabilities to reduce the response of the entire structure under earthquake loads and wind loads

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