Full-fabricated high-ductility anti-buckling support

Abstract

The invention relates to a full-fabricated high-ductility anti-buckling support. A reset counter-force spring is connected between two axial force-transmitting steel pipes in a rigid mode, and the reset counter-force spring and the two ends of the axial force-transmitting steel pipes connected to the two ends of the reset counter-force spring are located in a middle steel sleeve and can make relative sliding. Pin shaft anchorage plates are welded to the two sides of the middles of the two axial force-transmitting steel pipes, the two ends of bent energy consumption steel plates in arched facesare hinged to the pin shaft anchorage plates of the two axial force-transmitting steel pipes through pin shafts, and the two ends can make relative rotation in the faces. Joint connecting end platesare welded to the outer ends of the two axial force-transmitting steel pipes. According to the full-fabricated high-ductility anti-buckling support, differing from a force-bearing mechanism of a traditional anti-buckling support, supporting property parameters can be adjusted flexibly, the extremely-high continuity is achieved, full-fabricated construction measures are adopted, energy consumptionsections are exposed so that damage observing and replacing can be facilitated, and the full-fabricated high-ductility anti-buckling support has the self-resetting function through simple construction; and the economical efficiency is good, many functions are achieved, design is flexible, the earthquake-resistant ductility is good, and the very good application prospects and promotional value areachieved.

Description

technical field [0001] The invention relates to the technical field of anti-seismic and disaster prevention of building structures, belongs to the category of passive control of structural anti-seismic, and is specifically a fully assembled high ductility anti-buckling support. Background technique [0002] Traditional anti-buckling braces are also called buckling-restrained braces, or unbonded braces. Its main stress mechanism is similar. The core axial force unit of the support provides lateral continuous support through the external restraint unit, so that the buckling instability and failure of the core unit will not occur when the core unit is under compression, and the support can reach its core under axial tension and compression. The section yield force is close to the tension and compression bearing capacity of the member, thus making full use of the strength of the material. At present, there are two main structural forms of buckling-resistant bracing: (1) concret...

AI Technical Summary

Problems solved by technology

[0004] The structure of the current buckling-resistant brace determines that its manufacturing is relatively complicated, and the energy-consuming parts are inconvenient to replace after an earthquake. Usually, the entire component needs to be dismantled, resulting in waste of materials.

More importantly, the core unit of the current buckling-resistant brace is an axially stressed member, and its ultimate ductility is basically proportional to the length of the energy-dissipating core unit. The maximum deformation capacity is only tens of millimeters, and the yield deformation is only a few millimeters. The axial force mechanism and the physical characteristics of steel determine that these performance parameters cannot be easily adjusted according to needs.

When a rare earthquake strikes, the current anti-buckling braces are very likely to fail due to insufficient axial limit deformation capacity, that is, insufficient ductility, and fail to work.

In addition, the current anti-buckling supports have the ability to recover from plastic deformation is still less, although some anti-buckling supports have this function, but they are mostly realized by prestressed steel strands and converted steel casings, resulting in too complicated structure and inconvenient actual processing , and the cost is very high, it is rarely used in practical engineering

Images