A cooperative energy-dissipative buckling-resistant bracing member with large earthquake protection function

Abstract

Provided is a collaborative energy dissipation anti-buckling supporting construction member with a major earthquake protection function. An outer arresting cylinder encloses an energy dissipation inner core plate from the outer portion, an end portion connecting plate and an outer arresting cylinder outer connecting plate are arranged at two ends of the outer arresting cylinder, one end of the outer arresting cylinder is fixed on the end portion connecting plate, the other end is free from being connected, one end of the energy dissipation inner core plate is fixed on the end portion connecting plate, the other end of the energy dissipation inner core plate is connected with the end portion connecting plate in a welded mode, the end portion connecting plate is fixed on the outer arresting cylinder outer connecting plate, the energy dissipation inner core plate is connected with a friction automatic restoration device through an outer arresting cylinder outer connecting plate of a welding end, and thus series connection between a traditional anti-buckling supporting construction member and the friction automatically reset device is achieved to form the novel anti-buckling supporting construction member which has an automatic restoration characteristic and can achieve friction and cross-section yield collaborative energy consumption in an over-expected earthquake even a mega-earthquake. The problems of safety, continuous energy dissipation ability and restoration after the earthquake of the traditional anti-buckling supporting construction member in the over-expected earthquake even the mega-earthquake are resolved.

Description

technical field [0001] The invention relates to a support member, in particular to a support member capable of realizing energy dissipation and shock absorption control, in particular to a cooperative energy dissipation anti-buckling support member. Background technique [0002] In recent years, strong earthquakes have occurred frequently around the world. In view of this, scholars have proposed to define the concept of giant earthquakes beyond the fortification level of major earthquakes, moderate earthquakes, and small earthquakes. Efforts to achieve giant earthquake safety. Therefore, for buildings with important functions, it has important practical significance and safety value to introduce anti-seismic fortification measures of building structures in the case of unexpected large earthquakes or even huge earthquakes in the traditional design concept, and also improves the performance-based design to a certain extent. theoretical framework for seismic design. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] As a new type of support member with sufficient stiffness under moderate and small earthquakes and good energy dissipation performance under large earthquakes, Buckling-restrained braces (often abbreviated as BRB braces) can meet the specific requirements of multi-level fortification. With the development of application, various forms of anti-buckling braces have appeared one after another. As far as the forms of anti-buckling braces proposed and adopted are concerned, the energy dissipation design under large earthquakes is often characterized by full-section yielding. It will lead to several problems, such as: the strong elastic-plastic deformation of the energy-dissipating brace under a large earthquake will produce a large residual displacement, which makes it difficult to reset and replace after the earthquake; in view of the current design concept, the strong elastic-plastic deformation of the buckling-resistant brace The elastic-plastic deformation performance often cannot meet the energy consumption and safety requirements under unexpected large earthquakes or even huge earthquakes; if the energy consumption and work safety of anti-buckling braces under unexpected large earthquakes are considered, on the one hand, it will lead to an increase in material and production costs , on the other hand, it will actually lead to the use of the stiffness characteristics of the buckling-resistant brace instead of the elastic-plastic energy dissipation capacity under large earthquakes, which is equivalent to improving the design level, which is not the most effective way to solve the problem

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