Dual pipe constraint type self-resetting buckling-restrained brace device based on belleville springs

Abstract

The invention provides a dual pipe constraint type self-resetting buckling-restrained brace device based on belleville springs. The dual pipe constraint type self-resetting buckling-restrained brace device comprises an inner constraint pipe, an outer constraint pipe, a core energy consuming pipe, two guide pipes, two positioning plates, two inner end plates, two outer end plates, two positioning end plates, two connecting end plates and two groups of belleville springs; ends of the positioning plates are correspondingly inserted into two end openings of the inner constraint steel pipe; the positioning plates and the inner constraint steel pipe are correspondingly inserted into the core energy consuming steel pipe; and the two ends of the core energy consuming steel pipe and the end openings, far from the inner constraint steel pipe, of the two positioning plates are correspondingly and fixedly connected to the positioning end plates. According to the dual pipe constraint type self-resetting buckling-restrained brace device, the self-resetting resilience is provided by the belleville springs connected in series, the mechanical property of the belleville springs is stable, during theusing process, the supporting elastic resilience is equivalent to the design level, the stress loss is not caused, and the stable supporting self-resetting capacity is achieved.

Description

technical field [0001] The invention relates to the field of energy-dissipating supports, in particular to an anti-buckling support device based on a butterfly spring and a manufacturing method thereof. Background technique [0002] With the needs of the development of the times, my country's civil and structural engineering is facing a series of severe challenges. On the one hand, due to the uncertainty and complexity of the earthquake action, the structure may be subjected to an earthquake greater than the fortification intensity and cause serious damage to the structural members; on the other hand, even if the structure does not collapse after being subjected to an earthquake of the fortification intensity, some The special components were seriously damaged and could not be reinforced and repaired, so the structure could only be demolished and rebuilt, resulting in huge waste. [0003] The recoverable functional structure provides an effective solution to the above probl...

AI Technical Summary

Problems solved by technology

First of all, one of the main forms of existing self-resetting anti-buckling braces is to combine the concrete-constrained energy-dissipating inner core with unbonded prestressed tendons, which is heavy and inconvenient to install; the prestressed tendons cannot give full play to their performance , resulting in unstable support performance, asymmetric tension and compression hysteresis, and reduced energy dissipation capacity; there is a loss of prestress, resulting in a significant difference between the performance of the support in use and the design performance

Secondly, the buckling-resistant bracing members constrained by square casings have obvious strong and weak axes. Considering the randomness of the earthquake, it may lead to buckling and instability of the braces along the weak axes under the earthquake; Need to set multiple welds at the end, which is difficult to construct

Finally, the compactness has a great influence on the bearing capacity and buckling mode of the concrete-filled anti-buckling brace, and improper fabrication will seriously affect the energy dissipation capacity of the brace

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