Part-filling assembling lapping buckling-proof support

Abstract

The invention provides a part-filling assembling lapping buckling-proof support. The part-filling assembling lapping buckling-proof support can greatly consume earthquake input energy, reduces damage on a structure by an earthquake, adopts a modularized installation mode, and reduces positioning difficulty of field installation. The support and pitch points are connected in a lap fillet weld mode, and connection ductility is improved. A plurality of connecting plates are used for connecting hollow steel tubes and concrete filled steel tubes to be a whole, wherein the hollow steel tubes provide whole flexural rigidity. Self-weight of the support is reduced, and material utilization ratio is improved. The hollow steel tubes can be recycled after the earthquake. The part-filling assembling lapping buckling-proof support has the advantages of being low in machining cost, light in self-weight, good in economic benefit, convenient to construct, and capable of partly recycled after the earthquake. The part-filling assembling lapping buckling-proof support at least comprises a pair of L-shaped energy dissipation steel cores, concrete filled steel tube units restraining the L-shaped energy dissipation steel cores respectively, a pair of hollow square steel tubes, a plurality of sleeve connecting plates and isolation materials between the energy dissipation steel cores and the restraining units.

Description

(1) 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 control, and specifically relates to a buckling-proof brace assembled with four tubes that is only partially filled and constrained, which can be used in building structures to resist horizontal earthquakes and improve the anti-seismic performance of structures , and the weight is light, it can be installed by on-site splicing, and some peripheral restraint units can be recharged and reused, which greatly reduces the cost, and the lap joint method is used to greatly improve the quality of the joint welds and increase the reliability of the joints. Welding quality, safety and ease of construction. (2) Background technology [0002] my country is in an earthquake-prone area, and earthquake disasters occur every year, which pose a huge threat to people's life and property saf...

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Problems solved by technology

[0005] At present, the buckling-resistant braces have the following problems: (1) Node connection problems: Usually, the buckling-resistant braces are connected to the structure by means of bolted connections or butt weld connections. The bolted connections weaken the section greatly, and 16 connecting plates are required , it is not easy to locate accurately, and requires high construction precision, and the bolt connection is prone to slippage, which is not conducive to the exertion of the energy dissipation effect of the support; although the butt weld connection has no cross-section weakening, its welding defects are inevitable, because the butt weld The rigidity is high, and the welding shrinkage deformation will produce a large welding residual stress, which is very suitable for brittle fracture under the impact load of the earthquake, which affects the safety of the structure; (2) there is still a lot of room for optimization and improvement of the support: the current pure steel support Due to structural reasons, the restraint effect is usually worse than that of concrete-filled steel tube supports, but the self-weight of concrete-filled steel tube concrete supports is heavier, and the production and processing procedures are more, and the cycle is longer; (3) The cost of repair and replacement after the earthquake is relatively high: the buckling-resistant supports are currently earthquake-resistant. Afterwards, it usually needs to be completely replaced, but in fact, the area where the support is damaged is mostly the energy-consuming core, and the peripheral restraint units can be reused, but the current anti-buckling support is not easy to disassemble, resulting in a lot of waste; (4) Construction positioning is more difficult : At present, the anti-buckling support has high requirements on construction accuracy, and the connection position between the support end and the node and the length error limit of the support are very strict

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