One-way haunching structure for one-way large-span column grid underground garage top plate

Abstract

The utility model discloses a one-way haunching structure for a one-way large-span column grid underground garage top plate. The one-way haunching structure comprises a plurality of large-span direction main beams, a plurality of short-span direction main beams, a floor slab and a plurality of haunching structures. A plurality of large-span direction main beams are sequentially arranged in the direction where the space between the frame columns in the one-way large-span column net is large and enable the frame columns to be connected, and a plurality of short-span direction main beams are sequentially arranged in the direction where the space between the frame columns in the one-way large-span column net is small and enable the short-span frame columns to be connected. The floor slab is supported on the main beams in the large-span direction and the main beams in the short-span direction, haunching structures are symmetrically arranged on the two sides of the main beams in the large-span direction, and the haunching structures are located at the corners between the floor slab and the main beams in the large-span direction and connected with the floor slab and the main beams in the large-span direction respectively.

Description

Technical Field

[0001] This utility model relates to the field of underground garage structural design technology, specifically to a unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground garage. Background Technology

[0002] The choice of structural system for the roof slab of an underground parking garage has a significant impact on the overall cost of the project, making the selection of a reasonable structural system crucial for structural design. The main beam-large slab with haunches structure, as a relatively new basement roof slab structural system, has seen small-scale application in the more advanced design concepts of the southern coastal regions of my country. This structural form is often used in underground parking garages with a two-way large column grid, achieving an interior space aesthetic comparable to a flat slab floor, and reducing the basement floor height by 15-20cm compared to traditional beam-slab structures. However, due to the relative scarcity of parking garages using a two-way large column grid, and the complexity of construction due to haunches on the roof slab in both directions, its actual application in projects is limited.

[0003] Compared to underground parking garages with two-way large column grids, those with one-way large column grids are more common. The column spans in the larger direction are 7.8–8.4m, accommodating three vehicles; the shorter column spans are 5.0–5.4m, approximately the length of one vehicle. This column grid effectively meets the requirements of parking garage construction and is more economical than large column grid structures, hence its wider application. One-way large column grids often employ frame beam-slab structures. However, due to the larger span in the larger direction, the frame beams are higher, increasing the overall height of the parking garage and reducing the economic efficiency of one-way large column grids. Using a two-way haunched large slab structure is more complex to construct; and because one direction has a smaller span, its economic advantages are not significant.

[0004] Based on the above technical background, a unidirectional haunched structure is proposed to improve the economy of using haunched large plate structures under unidirectional column grid conditions, while also facilitating construction. Utility Model Content

[0005] To address the aforementioned technical problems with existing double-sided haunched slab structures, the purpose of this invention is to provide a unidirectional haunched structure for the roof slab of a single-sided large-span column grid underground parking garage. This solution significantly increases the stiffness of the frame beams in the large-span direction by adding a haunched structure 400 only in that direction. Furthermore, the addition of the haunched structure 400 reduces the beam height in the large-span direction, allowing for a 10-20cm reduction in the overall floor height of the parking garage, thus improving its overall economic efficiency. Simultaneously, unidirectional haunching simplifies construction, effectively overcoming the complex construction drawbacks of double-sided haunched slabs, and is more conducive to practical engineering applications.

[0006] To achieve the above objectives, the present invention provides a unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground garage, comprising several main beams in the large-span direction, several main beams in the short-span direction, a floor slab, and several haunch structures.

[0007] Several large-span main beams are sequentially arranged along the direction of larger frame column spacing in the unidirectional large-span column grid and connected to several frame columns. Several short-span main beams are sequentially arranged along the direction of smaller frame column spacing in the unidirectional large-span column grid and connected to several span columns. The floor slab is supported on several large-span main beams and several short-span main beams. The large-span main beams are symmetrically provided with haunches on both sides. The haunches are located at the corners between the floor slab and the large-span main beams and are connected to the floor slab and the large-span main beams respectively.

[0008] Furthermore, the armhole structure is a right-angled triangular structure, which is fitted into the right-angled corner between the floor slab and the main beam in the large span direction.

[0009] Furthermore, the thickness of the floor slab can be taken as 1 / 45 to 1 / 50 of the spacing between adjacent frame columns in the large span direction of the unidirectional large span column grid.

[0010] Furthermore, the side length connecting the haunch structure to the main beam in the large span direction is 1.5-2.0 times the thickness of the floor slab.

[0011] Furthermore, the side length of the haunch structure connected to the floor slab is in the range of 1 / 6 to 1 / 4 of the spacing between adjacent frame columns in the large span direction of the unidirectional large span column grid.

[0012] Furthermore, the main beam in the large span direction can be taken as 1 / 13 to 1 / 15 of the spacing between adjacent frame columns in the large span direction of the unidirectional large span column grid.

[0013] This utility model provides a unidirectional haunch structure for the roof slab of a one-way large-span column grid underground parking garage. This solution significantly increases the stiffness of the frame beams in the large-span direction by adding a haunch structure 400 only in that direction. Furthermore, the haunch structure 400 reduces the beam height in the large-span direction, allowing for a 10-20cm reduction in the overall floor height of the parking garage, thus improving its overall economic efficiency. Simultaneously, the unidirectional haunch is easier to construct, effectively solving the problem of complex construction associated with haunches on two-way floor slabs, and is more conducive to practical engineering applications. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 A top view schematic diagram of the unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground parking garage provided by this utility model;

[0016] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0017] Figure 3 for Figure 1 Cross-sectional view along the BB direction.

[0018] Illustration:

[0019] 10 frame columns;

[0020] The main beam in the long span direction is 100mm, the main beam in the short span direction is 200mm, the floor slab is 300mm, and the haunch structure is 400mm. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0022] The unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground garage provided by this utility model can be applied to a unidirectional large-span column grid underground garage, which can reduce the floor height of the underground garage, and the overall construction is simple and convenient, reducing costs.

[0023] See Figures 1-3 The diagram shows a schematic of the unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground garage provided by this utility model.

[0024] As shown in the figure, the unidirectional haunch structure for the roof slab of a unidirectional large-span column grid underground garage provided by this utility model includes four components: several main beams 100 in the large-span direction, several main beams 200 in the short-span direction, floor slab 300, and several haunch structures 400.

[0025] Among them, several large-span main beams 100 are arranged sequentially along the direction of large spacing of frame columns 10 in the unidirectional large-span column grid and several frame columns 10 are connected together.

[0026] Several short-span main beams 200 are sequentially arranged along the direction of smaller spacing of frame columns 10 in the unidirectional large-span column grid and connected to several span columns 10. The floor slab 300 is supported on several large-span main beams 100 and several short-span main beams 200. The large-span main beams 100 are symmetrically provided with haunches 400 on both sides. The haunches 400 are located at the corner between the floor slab 300 and the large-span main beams 100 and are respectively connected to the floor slab 300 and the large-span main beams 100.

[0027] Compared to existing technologies, this solution significantly increases the stiffness of the frame beams in the large-span direction by adding a haunch structure 400 only in that direction. Furthermore, the addition of the haunch structure 400 reduces the beam height in the large-span direction, allowing for a 10-20cm reduction in the overall floor height of the garage, thus improving its overall economic efficiency. Simultaneously, unidirectional haunching simplifies construction, effectively addressing the complexities of unidirectional haunching in two-way floor slabs, and is more conducive to practical engineering applications.

[0028] Furthermore, the haunch structure 400 is a right-angled triangular structure, which is fitted into the right-angled corner between the floor slab 300 and the main beam 100 in the large span direction;

[0029] This scheme only sets up main beams, such as main beam 100 in the large span direction and main beam 200 in the short span direction. No secondary beams are set up. The floor slab 300 is directly supported on the main beams. The floor slab 300 only adopts a one-way floor slab with haunches on both sides of the main beam 100 in the large span direction.

[0030] For a 300mm thick floor slab, the spacing between adjacent frame columns in the large-span direction of the unidirectional large-span column grid can be taken as 1 / 45 to 1 / 50.

[0031] In the haunch structure 400, the side length connecting to the main beam 100 in the large span direction is 1.5-2.0 times the thickness of the floor slab 300.

[0032] The length of the side connecting the haunch structure 400 to the floor slab 300 is 1 / 6 to 1 / 4 of the spacing between adjacent frame columns 10 in the large span direction of the unidirectional large span column grid.

[0033] The height of the main beam 100 in the large span direction can be appropriately reduced. The main beam 100 in the large span direction can be taken as 1 / 13 to 1 / 15 of the spacing between adjacent frame columns 10 in the large span direction of the unidirectional large span column grid, which can effectively reduce the structural height of the underground garage.

[0034] The floor slab 300 in the short span direction does not have a haunch structure 400. The beam height of the main beam 200 in the short span direction is the same as that of the ordinary frame slab structure. The haunch structure 400 intersects the main beam 200 in the short span direction perpendicularly.

[0035] The working principle of this utility model is as follows: Since the 300mm floor slab has a relatively large load and a thick slab, and the negative bending moment at the slab's junction with the beam often plays a controlling role, the addition of a haunch at the junction of the slab and beam ensures that the slab thickness matches the change in bending moment, thereby reducing reinforcement and achieving the most rational structural layout. In a unidirectional large column grid, due to the significant difference in span between the two directions, the load transfer area differs considerably. The unidirectional haunch structure forms a unidirectional load-bearing slab, making the frame beams more evenly stressed, unlike cross beams which generate concentrated forces at the mid-span of the main beam. This allows the performance of each section of the frame beam to be fully utilized. From the perspective of shape and stress mechanism, the unidirectional haunch slab can form a unidirectional arch shell effect, which is superior to planar members. Under the same vertical load, considering the arch shell effect of the 400mm haunch structure on both sides of the 100mm main beam in the large span direction, the height of the 100mm main beam in the large span direction can be less than the height of the main beam in a traditional main and secondary beam floor slab, thus reducing the basement floor height while meeting the basement's clear height requirements.

[0036] The beneficial effects of this utility model after adopting the above technical solution are as follows: In the case of a unidirectional large column grid, the unidirectional haunched floor slab and unidirectional arch shell effect make the frame beams more evenly stressed. The beam height can be less than the traditional main beam height, reducing the basement floor height. This expands the usable space, creating a simple and elegant aesthetic, making the basement layout more open, and providing a comfortable visual experience and spacious environment. The unidirectional haunched floor slab structure saves materials and labor in all processes, from formwork installation to rebar fabrication and tying. Given the current labor shortage, rising labor costs, and high financial and time costs in the capital-intensive construction industry, this provides favorable conditions for improving work efficiency and shortening the construction period, making it both economical and practical.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A one-way haunching construction for a one-way long-span column grid underground garage roof, characterized by, The structure comprises several large-span direction main beams, several short-span direction main beams, a floor, and several haunch structures. The several large-span direction main beams are arranged along the direction of large frame column spacing in the single-direction large-span column net and connect several frame columns, the several short-span direction main beams are arranged along the direction of small frame column spacing in the single-direction large-span column net and connect several frame columns, the floor is supported on the several large-span direction main beams and the several short-span direction main beams, the haunch structures are symmetrically arranged on both sides of the several large-span direction main beams, and the haunch structures are located at the corners between the floor and the large-span direction main beams and are connected with the floor and the large-span direction main beams respectively.

2. The unidirectional haunching configuration for unidirectional long-span column grid underground garage roof according to claim 1, characterized in that, The haunch structure is a right-angled triangle structure and is embedded in the right-angled corner between the floor and the large-span direction main beam.

3. The one-way haunching configuration for one-way long span column grid underground garage roof slab as claimed in claim 1, wherein, The thickness of the floor can be 1 / 45-1 / 50 of the spacing between adjacent frame columns in the large-span direction of the single-direction large-span column net.

4. The one-way haunching configuration for one-way long span column grid underground garage roof slab of claim 1, wherein, The length of the side connected with the large-span direction main beam in the haunch structure is 1.5-2.0 times the thickness of the floor.

5. The one-way haunching configuration for one-way long span column grid underground garage roof slab of claim 1, wherein, The length of the side connected with the floor in the haunch structure is 1 / 6-1 / 4 of the spacing between adjacent frame columns in the large-span direction of the single-direction large-span column net.

6. The one-way haunching configuration for one-way long span column grid underground garage roof slab of claim 1, wherein, The length of the large-span direction main beam can be 1 / 13-1 / 15 of the spacing between adjacent frame columns in the large-span direction of the single-direction large-span column net.

Images