Four-limb pre-stressed anti-buckling member connected through wavy webs

Abstract

A four-limb pre-stressed anti-buckling member connected through wavy webs is characterized in that the anti-buckling member comprises four cross core prestressed concrete filled steel pipe constraint type anti-buckling support limbs, four wavy webs, two end part end plates and eight end part reinforcing square steel pipes; each of the four cross core prestressed concrete filled steel pipe constraint type anti-buckling support limbs in the member comprises a cross core energy consumption member, a nonbonded material, a peripheral constraint square steel pipe, a prestressed rope and concrete; and the four limbs are distributed in the axis direction in parallel and sequentially connected through the four wavy webs in a welding manner so as to form a lattice type anti-buckling member with a square cross section. The four-limb pre-stressed anti-buckling member adopting the lattice type cross section can greatly improve the anti-bending rigidity and the bearing capability of the peripheral constraint member and is suitable for structures with large-tonnage shock absorbing energy consumption requirements. The wavy webs can be made high and thin, the steel usage of the webs is greatly saved under the condition of meeting peripheral rigidity requirements, and the economic benefit is improved.

Description

technical field [0001] The invention relates to a novel prestressed anti-buckling component of limbs connected by wave webs, and belongs to the technical field of structural engineering. Background technique [0002] The anti-buckling member is generally composed of two parts, the core member and the peripheral restraint member, and is a new type of lateral force-resistant member with excellent energy dissipation and shock absorption effects. Under the action of small earthquakes, the inner core of the buckling-resistant members remains elastic, providing sufficient lateral stiffness for the main structure; under the action of moderate and large earthquakes, the peripheral members provide sufficient constraints on the inner core members, so that the inner core can withstand repeated loads in tension and compression The lower full section enters yield, and its hysteresis curve is full, which can consume the energy input by the earthquake, and is widely used in the reinforceme...

AI Technical Summary

Problems solved by technology

Obviously, traditional buckling-resistant members and single prestressed concrete-filled steel tube-constrained buckling-resistant members cannot meet this demand.

The proposal of the separate anti-buckling member connects the two anti-buckling members through flat webs, corrugated webs or patch plates, so that the section of the peripheral constrained member can be expanded, and the stiffness of the peripheral constrained member and the overall load capacity of the member are improved. However, the separated anti-buckling member formed by the two limbs has a strong axis and a weak axis in its section. The bearing capacity of the member around the weak axis is much smaller than that of the member around the strong axis, and the advantages of section expansion have not been brought into play. and waste material

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