Long-span bi-prestressed superposed framework, floor system and construction method

Abstract

The invention relates to a long-span bi-prestressed superposed framework, a floor system and a construction method. The long-span bi-prestressed superposed framework comprises a prefabricated pillar with a bracket, wherein the prefabricated pillar supports a superposed beam; the superposed beam comprises two parts; the first part is a factory-made pre-tensioned or post-tensioned prestressed prefabricated part; the second part is a tensioned anchorage part formed by cast-in-place superposed partial concrete and external prestressed bars. According to the long-span bi-prestressed superposed framework, during application of a long-span assembled structure, the cross-sectional size of a prefabricated component can be reduced, and requirements for production, transportation and installation aremet; a pre-tension method can realize efficient production and mechanical operation of the prefabricated component; application of the external prestressed bars and anchoring of supporting componentscan improve the overall anti-seismic property of the structure; the progressive collapse resistance of the structure can be enhanced; efficient utilization of a design and construction integration prestressing technology can be realized; the requirements of the building industry for an assembled development tendency in an ultralong span and overweight load public buildings in the future can be met.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a large-span double-prestressed composite frame, a floor system and a construction method. Background technique [0002] Prefabricated buildings have become the development direction of the industrialization of the construction industry, and the establishment of a standard system to promote the design, construction, and production of parts of the construction industry will promote the standardization of structural parts, parts, and components, enrich the types of standard parts, and improve versatility and reliability. Replaceability, popularizing prefabricated structural systems suitable for industrialized production, accelerating the development of prefabrication and assembly technology for construction projects, and improving the integration level of construction industrialization technology have become an urgent task for the development of prefabricated b...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that when ordinary prefabricated reinforced concrete components are applied in long-span and heavy-duty structures, due to the need to meet the performance requirements of bearing capacity, deflection and cracks, it is often necessary to increase the size of the prefabricated components, and at the same time increase the weight of the prefabricated components. It brings difficulties to the production, transportation, hoisting and on-site installation of components, which limits the application of prefabricated structures in long-span and heavy-duty structures

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