A fully prefabricated steel-concrete composite floor system and its design calculation method

Abstract

The invention discloses a fully prefabricated assembled steel-concrete composite floor system and a design calculation method. The floor system includes a prefabricated concrete floor (1), H-shaped steel beams (2), beam-slab UHPC mortise and tenon connection nodes ( 3) UHPC mortise and tenon connection joints (4) with slabs, in which: the two sides of the precast concrete floor (1) are provided with shear slots (11) along the thickness direction of the slab; the upper flange of the H-shaped steel beam (2) is Stud connectors (21) are welded; two precast concrete floors (1) and H-shaped steel beams (2) are connected by beam-slab UHPC mortise and tenon joints (3); between two adjacent precast concrete floors (1) The board-to-board UHPC mortise and tenon joints (4) are used to connect. The design of the present invention adopts ultra-high-performance concrete UHPC to connect the prefabricated concrete floor, the H-shaped steel beam and the prefabricated concrete floor. The prefabricated floor system has the advantages of simple structure, reliable performance, convenient and fast construction, and environmental protection.

Description

technical field [0001] The invention relates to the technical field of building structure connection construction, in particular to a fully prefabricated steel-concrete composite floor system and a design calculation method. Background technique [0002] As an important part of the overall lateral force resistance system of the building structure, the floor not only needs to bear the constant and live loads of the floor, but also effectively transmit the horizontal earthquake action and wind load to other lateral force resistant components. The traditional steel-cast-in-place concrete floor has good mechanical properties and stiffness, but it has problems such as on-site formwork operations, steel bar binding operations, and large concrete pouring operations, slow construction operations, high labor costs, and serious environmental pollution. It does not conform to the development concept of building industrialization and green building. In order to meet the needs of indust...

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Problems solved by technology

The traditional steel-cast-in-place concrete floor has good mechanical properties and stiffness, but it has problems such as on-site formwork operations, steel bar binding operations, and large concrete pouring operations, slow construction operations, high labor costs, and serious environmental pollution. Does not conform to the development concept of building industrialization and green building

In order to meet the needs of industrialized construction, the floor forms of the existing prefabricated steel-concrete composite floors mainly include traditional truss-reinforced floor slabs, detachable bottom formwork truss-reinforced floor slabs, and laminated slab composite floors, etc. However, market verification shows that the above-mentioned The product is still not a mature solution for prefabricated residential building floors: traditional truss-reinforced floor slabs have poor aesthetics due to exposed profiled steel plates, hinder decoration, and have low consumer acceptance; the construction process of truss-reinforced floor slabs with removable bottom formwork is complicated , the actual reusability of the bottom form is not high, and the cost control is difficult; while the actual thickness of the laminated slab composite floor is often greater than 150mm, and the adaptability in residential buildings is low

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