Preloaded spring self-restoring energy-dissipating support

Abstract

The invention discloses a setup spring self-recovery energy dissipation brace in the technical field of self-recovery energy dissipation braces. The brace comprises an inner pipe, an outer pipe, a spring, a spring baffle and a guide block; the inner pipe comprises a left inner pipe, a right inner pipe, a first steel pipe, a first steel pipe left baffle, a first steel pipe right baffle, an inner pipe left stopper, an inner pipe right stopper, an inner pipe outer friction plate, a high-strength bolt and an inner pipe connecting plate; the outer pipe comprises a left outer pipe, a right outer pipe, a second steel pipe, an outer pipe left baffle, an outer pipe right baffle, an outer pipe internal left stopper, an outer pipe internal right stopper, an outer pipe inner friction plate and an outer pipe connecting plate; the spring comprises a first spring and a second spring, wherein the first spring is sleeved outside the left inner pipe, and the second spring is sleeved outside the right inner pipe; two ends of the spring are connected with the spring baffle. The brace has the advantages that residual deformation of a structure is decreased, the brace is convenient to construct and easy to maintain and replace after earthquake action, and normal usage state affecting time is shortened.

Description

technical field [0001] The invention belongs to the technical field of self-restoring energy-dissipating supports, and in particular relates to a self-restoring energy-dissipating support of a preloaded spring. Background technique [0002] Earthquake is a major natural disaster faced by human beings for a long time, causing a large number of casualties and damage or collapse of buildings. With the development of science and technology and economy, the codes for seismic design are constantly being improved. The current code for seismic design in my country is "Code for Seismic Design of Buildings" (GB50011-2010). Xiu, the earthquake will not fall." Due to the complexity and uncertainty of earthquake action, the uncertainty of the structure itself (material, strength, geometric parameters, calculation model), the error of the simplified model for design analysis, and the uncertainty of site conditions, even if the seismic design is carried out according to the current code W...

AI Technical Summary

Problems solved by technology

These types of supports have the following problems: ordinary supports are prone to buckling under compression, and their tension-compression hysteretic responses are obviously asymmetrical. The reciprocating load during a large earthquake can easily cause the failure or destruction of the support itself and the connection, and the hysteretic loss after buckling It is difficult to effectively consume the energy input by the earthquake; the anti-buckling brace adopts a bilinear hysteresis model, the hysteresis curve is full, and the energy dissipation capacity is strong. , there is a large residual deformation, which makes reinforcement and repair difficult or even impossible, causing economic losses and affecting the use; shape memory alloy self-recovery energy dissipation support makes full use of the superelastic properties of shape memory alloys, and the flag-shaped hysteresis curve Plumps, reduces or even eliminates residual distortion

However, the performance of shape memory alloys is affected by temperature, and after deformation, it is necessary to heat the shape memory alloy to restore it to the state before deformation, and the temperature rise may have an adverse effect on other supporting components; self-recovery of prestressed steel bars Due to the shortcoming of the small elastic deformation of the prestressed steel bars, the energy-dissipating support cannot meet the needs of the interstory displacement of a typical frame structure.

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