Irregular II type large-span concrete vierendeel sandwich plate floor and making method thereof

Abstract

The invention discloses an irregular II type large-span concrete vierendeel sandwich plate floor. The ratio of the long side and the short side of the reinforced concrete is that Lx / Ly is large than 1.5, a one-way stress plate is formed, the ratio of the long side Lx and support spacing does not have common divisor, the position where the support spacing is large is located in the center of the long side, and a grid structure comprises a square grid a, a right angled isosceles triangle grid b, a parallelogram grid c, an irregular quadrilateral grid d and a non-right angled isosceles triangle grid e. The invention further provides a making method of the irregular II type large-span concrete vierendeel sandwich plate floor. Accordingly, energy conservation and emission reduction are promoted, and the good technical-economic index is achieved.

Description

technical field [0001] The invention relates to the technical field of long-span concrete hollow sandwich slab floors, in particular to an irregular type II long-span concrete hollow sandwich slab floor and a manufacturing method thereof. Background technique [0002] Reinforced concrete hollow sandwich slab floor, following the first patent in 1997 "concrete shear key type two-way hollow slab" (ZL97200102. X). When the plan form of the floor is a narrow and long rectangular plane, a concrete large-span orthogonal oblique hollow sandwich slab floor was proposed, and it has been applied in public and industrial buildings in more than a dozen provinces and cities across the country, with a construction area of ​​more than 100 square meters. 10,000 square meters, the concrete hollow sandwich panel has high shear stiffness, but it is different from ordinary concrete panels with infinite shear stiffness. It is a sandwich panel (also known as sandwich panel) that considers the in...

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Problems solved by technology

[0003] Narrow and long plane with large span (L x ≥18m) concrete structure floor, its long side (L x ) and the short side of the span (L y ) ratio L x / L y After ≥1.5, the traditional method is to use concrete girders or prestressed concrete girders, which not only causes the problem of "fat beams and fat columns", but also increases the cost of the project. In the "Empterium Floor and Manufacturing Method" patent, for narrow and long long-span floors, the distance between the supports on the long side and the span side is equal, that is, the distance between the supports on the long side and the short side has a common divisor, for example, the distance between the supports is 3.6 m, long side L x =36m=10×3.6m, span side L y =21.6m=6×3.6m, i.e. the entire orthogonal slanted concrete hollow grid floor, with right-angled isosceles triangular grids around and square grids inside, with only two types of grids

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