CN2923870Y - Long-span and large-column spacing quasi-rib type prestressed steel grid roof - Google Patents

Abstract

The utility model discloses a large-span and large-column-distance quasi-rib type prestressed steel grid roof, which comprises a quadrangular pyramid flat grid frame (1), and prestressed The stress space tube truss (2), the quadrangular pyramid flat grid (1) is connected to the prestressed space tube truss (2); the utility model mainly solves the problem of large span (80m≤L≤150m), large column a≤60m), the super-long-span steel grid structure roof has the characteristics of small steel consumption and low engineering cost.

Description

Long-span and large-column spacing quasi-rib type prestressed steel grid roof

Technical field:

The utility model relates to a roof, in particular to a large-span (80m≤L≤150m) large column spacing (32m≤a≤60m) quasi-ribbed floor type prestressed steel grid roof.

Background technique:

In civil engineering construction, reinforced concrete ribbed floor and prestressed concrete ribbed floor are the common floor structure forms in engineering, but when the plane size and column distance of the building are increased by 5 to 8 times, and the indoor When there is no column, it is unreliable to use reinforced concrete ribbed floor and prestressed concrete ribbed floor. At present, for this kind of roof with large span (80m≤L≤150m) and large column spacing (32m≤a≤60m), the flat steel grid structure is generally used, and it must be made into three layers, but the amount of steel used is relatively large. If it reaches ^more than 100kg/m2, the project cost is relatively high, and it is not the best roof structure form.

Invention content:

The purpose of this utility model is to provide a prestressed steel grid roof with a large span and large column spacing, which not only meets the strength and rigidity requirements of the structure, but also has the characteristics of small steel consumption and low engineering cost. To overcome the deficiencies in the prior art.

The utility model is constituted as follows: it includes a quadrangular pyramid flat grid, and a prestressed space pipe truss is installed on the support column of the roof, and the quadrangular pyramid flat grid is connected to the prestressed space pipe truss.

The prestressed space pipe truss is a prestressed space pipe truss in the body. It is equipped with a force transmission device on the middle part of the lower chord of the pipe truss. on the seat node.

The force transmission device is composed of a steel box, a fixed pulley installed in the steel box and a tie rod fixed at the bottom of the steel box.

The roof of the utility model adopts prestressed space pipe trusses at the supporting columns, and adopts square pyramid flat grids between the prestressed space pipe trusses to form a quasi-ribbed floor type prestressed steel grid structure, thereby To achieve the purpose of saving steel consumption and reducing project cost under the conditions of structural strength, rigidity and integrity. Among them, the mechanical model of the quadrangular pyramid planar grid is "pseudo-sandwich plate", while the mechanical model of the prestressed space tube truss is "pseudo-sandwich beam". Compared with non-prestressed steel grid, its steel consumption can be reduced by 25-30% per square meter, which has significant economic benefits.

Description of drawings:

Accompanying drawing 1 is the planar structural representation of the utility model;

Accompanying drawing 2 is the planar structure schematic diagram of the quadrangular pyramid plate type network frame that is placed upright of the present utility model;

Accompanying drawing 3 is the structural representation of the internal prestressed space pipe truss of the utility model;

Accompanying drawing 4 is the A-A sectional view of accompanying drawing 3 (that is, the web layer plane and steel cable layout plan of the internal prestressed space pipe truss of the present utility model);

Accompanying drawing 5 is the structure diagram of the force transmission device of the present utility model.

Detailed ways:

Embodiment of the present utility model: as shown in accompanying drawing 1, it is made of uprightly placed quadrangular pyramid planar grid truss 1 and prestressed space pipe truss 2, and prestressed space pipe truss 2 is installed on the support column 3 of roof, The upright quadrangular pyramid flat grid frame 1 is connected above the oblique web of the prestressed space pipe truss 2 . Among them, the prestressed space pipe truss 2 adopts the prestressed space pipe truss in the body, and its structure is as follows: it is equipped with a force transmission device 4 on the middle part of the lower chord of the pipe truss, and the prestressed steel cable 5 is located in the pipe truss and passes through the force transmission device 4. Both ends are fixed on the upper chord support node of the pipe truss, wherein the force transmission device 4 is composed of a steel box 6, a fixed pulley 7 installed in the steel box 6 and a tie rod 8 fixed at the bottom of the steel box 6. The prestressed space tube truss 2 mentioned above can also be flexibly selected according to the span and column spacing as "the prestressed space tube truss structure in the lower chord tube" or "short strut type new string tension truss structure".

The utility model mainly solves the super large-span steel grid structure roof with large span (80m≤L≤150m) and large column spacing (32m≤a≤60m). The square-pyramid flat grid frame 1 is equivalent to a plate, which forms a prestressed steel grid roof of a quasi-ribbed floor type, providing a new type of roof for large-span public buildings and industrial buildings. build.

Claims (3)

1. large-span large-column distance quasi-ribbed floor type prestressed steel grid roof, it comprises quadrangular pyramid plate net support (1), it is characterized in that: on the support column (3) of roof system prestressed space tube truss (2) is housed, quadrangular pyramid plate net support (1) is connected on the prestressed space tube truss (2).

2. large-span large-column distance quasi-ribbed floor type prestressed steel grid roof according to claim 1, it is characterized in that: prestressed space tube truss (2) is the prestressing with bond space tube truss, it is equipped with load transfer device (4) on the lower edge middle part of pipe truss, prestressed cable (5) is positioned at the pipe truss and passes two ends, load transfer device (4) back and is fixed on the support node that winds up of pipe truss.

3. large-span large-column distance quasi-ribbed floor type prestressed steel grid roof according to claim 2 is characterized in that: load transfer device (4) by steel case (6), be contained in the fixed pulley (7) in the steel case (6) and be fixed on pull bar (8) formation of steel case (6) bottom.