Fabricated high-strength and high-ductility concrete sleeve-free connection structure and method

Abstract

The invention provides a fabricated high-strength and high-ductility concrete sleeve-free connection structure and method. The fabricated high-strength and high-ductility concrete sleeve-free connection structure comprises prefabricated reinforced concrete beams, the prefabricated reinforced concrete beams comprise hoop ribs and lap joint section longitudinal ribs arranged on the lower portions ofthe beams, the upper portions of the hoop ribs are exposed, and reserved hoop ribs are arranged on the outer sides of the lap joint section longitudinal ribs. The lower portions of the prefabricatedreinforced concrete beams are lapped joint in a staggered mode through the lap joint section longitudinal ribs, and spiral hoop ribs are arranged at the staggered lap joints of the lap joint section longitudinal ribs. The upper portions of the prefabricated reinforced concrete beams are connected through the hoop ribs sequentially penetrating through the reserved hoop ribs and arranged in the prefabricated reinforced concrete beams, the high-strength and high-ductility concrete is post cast in a lap joint section, and the concrete is post cast on the upper portions of the prefabricated reinforced concrete beams. The lap joint length of rebars can be sharply shortened by utilizing the superhigh strength and the adhesive performance of the high-strength and high-ductility concrete, usage ofthe reserved hoop ribs is reduced or even omitted, anchor bending of beam rebars is avoided, and the problem of rebar overcrowding in a joint area is solved. Because a sleeve is not used, factory manufacturing is convenient, mounting is convenient, specialized personnel are not needed, and the quality is easy to control.

Description

technical field [0001] The invention belongs to the technical field of assembled concrete structures, and in particular relates to an assembled high-strength and high-ductility concrete sleeve-free connection structure and a connection method. Background technique [0002] Since the prefabricated components are prefabricated in the factory, the quality of the prefabricated components can be well guaranteed, and the safety of the prefabricated structure mainly depends on the connection between these components and the surrounding components. Reliable connection quality can realize the transmission of the specified internal force according to the design requirements, and will not cause problems in use and appearance. If there are defects in the quality of the joint connection, it will cause problems in use such as cracks and leakage, and it will affect the force transmission between components and components, components and supporting structures, causing problems in bearing ca...

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Problems solved by technology

Among them, welding connection and mechanical connection are extremely difficult to be applied in the connection of fabricated structural members in practice due to the extremely difficult on-site construction; lashing lap joints are only used in prefabricated laminated panels and joints due to the long lap length and poor connection performance. The connection of steel bars in some beams; sleeve grouting connection and restraint oar-anchor connection are two connection methods available for prefabricated concrete structures at present, but due to the large size, heavy weight and complex connection structure of prefabricated components, coupled with the fact that China's construction The low labor force level in the industry increases the difficulty of prefabricated building construction that requires a high degree of refinement. Therefore, both the sleeve grouting connection and the restraint paddle-anchor connection have disadvantages such as difficult alignment and complicated operation. Once the steel bars collide during construction Or if the error is large, the installation will not be possible, which will affect the construction period and cause waste

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