Self-locking assembly type buckling-restrained brace for nuclear island structure

Abstract

The invention discloses a self-locking assembly type buckling-restrained brace for a nuclear island structure. The self-locking assembly type buckling-restrained brace comprises a core plate and stiffening ribs, wherein the core plate is sleeved with a sleeve; the sleeve comprises a plurality of steel pipe concrete blocks; each piece of steel pipe concrete is provided with concave-convex blocks which can be matched with each other; the sleeve is formed by splicing and assembling multiple pieces of steel pipe concrete; the multiple pieces of steel pipe concrete are restrained and fixed through self-locking devices; and the steel pipe concrete block a and the other steel pipe concrete blocks are fixed through long angle steel or short angle steel. The self-locking assembly type buckling-restrained brace has the advantages that the supporting outer sleeve is formed by assembling the multiple steel pipe concrete blocks, the multiple steel pipe concrete blocks are restrained and fixed through the self-locking devices and the angle steel, and the self-locking devices are ingeniously provided with knob switches capable of controlling lock catches to stretch out and draw back, so that the sleeve is convenient to disassemble and the quality inspection of the core plate in the using process is facilitated.

Description

technical field [0001] The invention relates to the technical field of building structure engineering, in particular to a self-locking assembled anti-buckling support for a nuclear island structure. Background technique [0002] Buckling-restrained bracing (BRB) is a bracing form that has the dual functions of ordinary bracing and metal energy-dissipating damper. It can provide steel frames with higher lateral stiffness and additional damping. It is the first to enter under the action of earthquake Plasticity, which exerts energy dissipation mechanism to reduce the response of the structure under earthquake motion. [0003] The buckling support is mainly composed of three parts: the supporting inner core, the outer constraining member and the unbonded material set between the above two. Under the action of moderate or large earthquakes, due to the lateral constraints of the outer restraint members, the yield section of the support inner core can fully yield and dissipate th...

AI Technical Summary

Problems solved by technology

There are often a large number of steel structure platforms inside the nuclear island plant, but due to the professional layout requirements of the nuclear island plant technology and construction, the span and support load of some steel platforms are relatively large, and the seismic response level of the steel platform is relatively low under the design basis earthquake. High, which brings great challenges to the seismic design of safety-related systems, equipment or pipelines on steel platforms, and increases the cost of seismic identification of related systems and equipment

At present, there is no "energy dissipation and shock absorption" design in the form of buckling restraint bracing in the seismic design of the nuclear island's steel structure platform in the existing nuclear power plants in operation and under construction in China to reduce the response of the structure under earthquake motion.

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