Novel assembly type self-resetting buckling restrained brace device with SMA (Shape Memory Alloy)

Abstract

The invention provides a novel assembly type self-resetting buckling restrained brace device with SMA (Shape Memory Alloy). According to the self-resetting system of the device, the SMA cable material is pulled no matter the whole structure is pressed or pulled, so that considerable self-resetting performance is provided for the structure. An energy consumption system of the device enables the whole structure to have excellent energy consumption performance. Therefore, when the whole structure is applied to engineering through an external connecting system, the anti-seismic function that a building structure is not damaged in small earthquakes and medium earthquakes and can be replaced in large earthquakes can be achieved, it is guaranteed that a building only generates small residual deformation, and meanwhile the excellent energy dissipation performance is achieved; and the requirements of rigidity, energy consumption and bearing capacity in the design of a normal use limit state and a bearing capacity limit state of a building structure can be met.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a buckling restraint support device. Background technique [0002] China is located in the world's two largest earthquake-concentrated belts—the circum-Pacific seismic belt and the Eurasian seismic belt. The earthquakes in China are numerous and strong, making China one of the countries that suffer the most earthquake damage in the world. Therefore, the building The seismic performance of the structure is of great significance to the safety of people's lives and property. The damage of earthquakes to building structures mainly comes from the shear waves generated by earthquakes. Ductility and energy dissipation performance become the measure index of structure's seismic capacity. [0003] Traditional building structures are designed with ductile anti-seismic concepts to effectively dissipate earthquake energy at the cost of joint plastic deformation or support buc...

AI Technical Summary

Problems solved by technology

[0003] Traditional building structures are designed with ductile anti-seismic concepts to effectively dissipate earthquake energy at the cost of joint plastic deformation or support buckling constraints, but the excessive residual deformation caused by energy consumption makes the building lose its use immediately after the earthquake. , or even permanent failure, which is extremely unfavorable to the resettlement of victims after the earthquake and the safety of urban economic property, and needs further improvement

In the prior art, most self-resetting energy-dissipating supports have a single form of energy consumption, and most of them only use materials or friction to dissipate energy, resulting in poor energy-dissipating performance of the overall support. Sliding large displacements between them are used to create the self-resetting displacement difference. Therefore, there must be no connection between the components that generate relative displacements. This often results in structural stiffness only provided by the tensile stiffness of the self-resetting cables. The overall structural rigidity is insufficient. Large lateral movement occurs when the force is applied, which does not meet the building code and normal use requirements

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