CN112064852A - Floor system structure with double-curved arch shell and construction method thereof - Google Patents

Abstract

The invention discloses a floor system structure with a hyperbolic arch shell, which is characterized by comprising an upright post (1), a beam (2), a filling layer (3) and a hyperbolic arch shell (4), wherein the upright post (1) and the beam (2) form a frame, the beam (2) is distributed along the transverse direction and the longitudinal direction, four beams connected end to end form a beam lattice, a hyperbolic arch shell is arranged in each beam lattice, the upper surface and the lower surface of the hyperbolic arch shell are in hyperbolic arches, and the edges of the hyperbolic arch shell are respectively fixedly connected with the side surfaces of the four beams; the filling layer covers the hyperbolic arch shell, and the top surface of the filling layer is flat. The invention fully utilizes the superior compression performance of the concrete, avoids the poor tensile property of the concrete and can save a large amount of steel bars and concrete; the double-curved arch shell evenly distributes and transmits load to the frame, so that the stress of the frame structure is balanced, the edge of the double-curved arch shell is fixed by utilizing the side of the frame beam, and the bearing capacity of the double-curved arch shell is improved.

Description

A kind of floor structure with double-curved arch shell and construction method thereof

technical field

The invention relates to a floor structure with a double-curved arch shell and a construction method thereof, belonging to the technical field of building structures.

Background technique

The tensile strength of concrete is generally only 1/10 to 1/20 of the compressive strength. Therefore, when designing concrete components, it is always hoped that concrete components can maximize their compressive performance and avoid tensile stress. In the structural design of bridges, arch bridges are the most common way, but arch structures are rarely seen in the design of residential buildings.

Brick arch floor slabs were used in brick masonry houses decades ago. The method is to make bricks at the top of the next floor, and fill the upper part of the arch to serve as the floor of the upper floor. With the improvement of the economy of reinforced concrete and the requirements of earthquake resistance , this practice has been eliminated.

At present, the reinforced concrete floor structure widely used in the span of 6 to 12 meters is the beam-slab structure, and the comprehensive economical efficiency of the large-slab floor structure is better. However, the beam-slab structure relies on the bending capacity of the slab and the secondary beam to bear the vertical load. This kind of structure does not give full play to the compressive capacity of the concrete, and the amount of concrete and steel bars is large.

Patent Document 1 (publication number CN103046769A) discloses a building with a double-curved arch floor slab and an energy-saving wall, wherein the floor slab is thick on four sides, thin in the middle, flat on the top, and double-curved arched concrete integral floor on the bottom, which conforms to the beamless floor. When the floor slab is subjected to a uniform vertical load, the steel bars on the upper part of the slab at the thickened part around the column are pulled and the concrete at the lower part is compressed. Lateral thrust; in the mid-span of the floor, the concrete on the upper part of the slab is compressed and the steel bars on the lower part are in tension; and the floor slab is an integral slab, and the tension of the steel bars on the upper part of the slab and the compression of the concrete on the lower part have a coordinated relationship of deformation. The disadvantage of the building in Patent Document 1 is that it is essentially a slab-column structure, similar to a large-slab floor structure with haunches, and the flexural capacity of the plate bears the vertical load. This structure does not give full play to the compressive capacity of concrete. The amount of concrete and steel bars is large.

SUMMARY OF THE INVENTION

Aiming at the fact that in the prior art, the high compressive strength of concrete is not fully exerted by the added haunch slab. A floor structure of an arch shell and its construction method. The specific technical scheme is as follows.

A floor structure with a double-curved arch shell is characterized in that it comprises uprights, beams, filling layers and a double-curved arch shell, the uprights and the beams form a frame, and the beams are along two horizontal and longitudinal directions Distribution, the four beams connected end to end form a beam grid, each beam grid is provided with the double-curved arch shell, the upper surface and the lower surface of the double-curved arch shell are double-curved The edges of the arch shell are respectively fixedly connected with the side surfaces of the four beams; the filling layer covers the double-curved arch shell, and the top surface of the filling layer is flat.

Using the above technical solution, the top of the double-curved arch shell is located in the center of the beam lattice, and the double-curved arch shell can convert the vertical load into the pressure on the shell section and transmit it to the beam. On the whole, the double-curved arch shell only bears compressive stress without tension. Stress; the surrounding edges of the double-curved arch shell are firmly connected to the beam, and the concrete frame beam can limit the displacement of the edge of the double-curved arch shell. The vertical bearing capacity of the arched shell can also save the consumption of concrete and reinforcement. The upper part of the double-curved arch shell is the filling layer, and the filling layer plays the role of evenly distributing the vertical load to the double-curved arch shell to prevent stress concentration. Among them, the double-curved arched shell refers to an arched shape in both lateral and longitudinal directions, and does not require the same curvature in any lateral or longitudinal section, and can be a hyperbolic parabolic twisted shell, spherical shell, etc.

Further, the filling layer is also provided with a panel, and the panel plays a role in meeting the usage requirements, for example, when carrying a vehicle, the panel evenly transmits the vertical pressure received to the filling layer.

Further, the ends of the reinforcing bars in the double-curved arch shell are anchored inside the beams, and transversely and longitudinally staggered reinforcing bars can be arranged in the double-curved arch shell, and the reinforcing bars are also arched, and both ends of the reinforcing bars are It is anchored inside the two beams, which can improve the reliability of the connection between the double-curved arch shell and the beam.

Further, the thickness of the middle of the double-curved arch shell is smaller than the thickness of the edge, which conforms to the stress condition of the double-curved arch shell, and is beneficial to reduce the amount of concrete.

Further, the lower surface of the double-curved arch shell is fixedly provided with a protruding stiffening rib, the stiffening rib extends laterally and longitudinally and is in the form of a grid; Preferably, the bottom surface of the stiffener is horizontal, and the stiffener is provided with prestressed steel bars.

Further, the material used for the filling layer includes at least one of slag, expanded perlite, aerated concrete, ceramsite concrete, sand, construction waste residue, and plain concrete.

Further, the material used for the double-curved arch shell is reinforced concrete, fiber concrete or plain concrete.

Further, the material used for the panel is reinforced concrete, fiber concrete, plain concrete or shotcrete.

Based on the same inventive concept, the present invention also relates to the above-mentioned construction method of the floor structure with the double-curved arch shell, which mainly includes the following steps:

1), for the column support form, pour the column;

2) For the beam and the double-curved arch shell formwork, set the steel cage of the beam and the steel bar of the double-curved arch shell, and the end of the steel bar of the double-curved arch shell extends into the interior of the beam;

3), pouring beams and double-curved arch shells;

4), lay the filling layer;

5) Bind the steel bars of the panel and pour the panel.

Compared with the existing floor structure, the present invention has the following beneficial effects.

The invention takes advantage of the characteristics of bi-directional (horizontal, vertical) section compression when the concrete double-curvature arch shell is subjected to vertical loads, distributes the loads evenly to the frame, and makes the frame structure stress balanced, thus ensuring the economy of frame design.

The invention makes full use of the double-curved arch shell to transmit the vertical load by pressure, makes full use of the superior compression performance of concrete, avoids the poor tensile performance of concrete, and thus can save a lot of steel bars and concrete.

The invention utilizes the lateral bending rigidity and bearing capacity of the bidirectional (horizontal and longitudinal) concrete frame beams, and uses the side of the frame beam to fix the edge of the double-curved arch shell, thereby improving the bearing capacity of the double-curved arch shell.

The invention utilizes the gap between the double-curved arch shell and the floor plane to fill light-weight materials and set up panels to disperse the concentrated load on the floor, and plays the role of protecting the double-curved arch shell and reducing the local bending moment, so it can reduce the Small double dome shell thickness.

The concrete double-curved arch shell of the present invention can use a reusable integral formwork. After the construction of the double-curved arch shell is completed, filling the top with lightweight materials and making the panel are common projects that do not require special equipment and processes, so the construction cost is low and the speed is fast.

Description of drawings

Fig. 1 is the top view of the floor structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 .

In the figure: column 1, beam 2, filling layer 3, double-curved arch shell 4, panel 5, steel bar 6, transverse X, longitudinal Y.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings.

Referring to Figure 1-2, the floor structure with double-curved arch shell includes column 1, beam 2, filling layer 3 and double-curved arch shell 4, column 1 and beam 2 form a frame, and beam 2 is along the lateral X and longitudinal direction Y Distributed in two directions, the four beams 2 connected end to end form a beam lattice, each beam lattice is provided with a double-curved arch shell 4, and the upper surface and the lower surface of the double-curved arch shell 4 are in the shape of a double-curved arch. The edges of the arch shell 4 are respectively fixedly connected with the side surfaces of the four beams 2; the filling layer 3 covers the double-curved arch shell 4, and the top surface of the filling layer 3 is flat. Preferably, a panel 5 is also provided on the filling layer 3 .

The reinforcing bars 6 in the double-curved arch shell 4 are arranged horizontally and vertically, and the reinforcing bars 6 are arched. sex.

Preferably, the thickness of the middle of the double-curved arch shell 4 is smaller than the thickness of the edge, which conforms to the stress condition of the double-curved arch shell and is beneficial to reduce the amount of concrete.

Preferably, a protruding stiffening rib (not shown) is fixed on the lower surface of the double-curved arch shell 4, and the stiffening rib extends laterally and longitudinally in a grid shape. Preferably, the bottom surface of the stiffening rib is horizontal, and prestressed steel bars are arranged in the stiffening rib.

The materials used for the filling layer 3 include at least one of slag, expanded perlite, aerated concrete, ceramsite concrete, sand, construction waste slag, and plain concrete, which should meet the requirements of local pressure checking.

The material used for the double-curved arch shell 4 is reinforced concrete, fiber concrete or plain concrete.

The material used for the face plate 5 is reinforced concrete, fiber concrete, plain concrete or asphalt concrete. The concrete strength of the face plate 5 should meet the requirements of local compression check and calculation, and has a certain waterproof function.

The above-mentioned construction method of the floor structure with the double-curved arch shell mainly comprises the following steps:

1), for the column support form, pour the column 1; the column 1 is arranged at intervals along the horizontal X and vertical Y directions;

2), for the beam 2 and the double-curved arch shell 4, set the reinforcement cage (not shown) of the beam 2 and the steel bar 6 of the double-curved arch shell 4, and the end of the steel bar 6 of the double-curved arch shell 4 extends into the beam The interior of 2; the formwork of the double-curved arch shell 4 can use a reusable integral formwork;

3), pour the concrete of beam 2 and double-curved arch shell 4;

4), laying the filling layer 3;

5) Bind the steel bars of the panel 5 and pour the concrete of the panel.

The floor structure of the present invention utilizes the force characteristic of the concrete double-curved arch shell 4 to resist the vertical pressure of the floor, and the double-curved arch shell 4 bears the vertical pressure on the floor. Strict constraints ensure good working performance of the double-curved shell 4 . The force transmission process is: the vertical external load received by the floor acts on the panel 5, the panel 5 transmits the load to the lightweight material of the filling layer 3, the filling layer 3 distributes the pressure to the hyperbolic arch shell 4, and the hyperbolic The arch shell 4 transmits the vertical load to the peripheral beam 2 through integral compression. Since the beam 2 itself has sufficient bearing capacity for the pressure from the double-curved arch shell 4, the horizontal pressure direction of the double-curved arch shell 4 on both sides of the beam 2 is reversed, so the beam 2 will not produce horizontal displacement, and the double-curved arch shell 4 will not produce horizontal displacement. The edges of 4 can remain approximately fixed. The entire double-curved shell 4 functions in a way that it is subjected to compressive stress.

The embodiments of the present invention are described above with reference to the accompanying drawings, and the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative rather than limiting. Those of ordinary skill in the art, under the inspiration of the present invention, do not deviate from the purpose and rights of the present invention. In the case of the claimed protection scope, many forms can also be made, which all fall within the protection scope of the present invention.

Claims (10)

1. A floor structure with a double-curved arch shell, characterized in that it comprises a column (1), a beam (2), a filling layer (3) and a double-curved arch shell (4), the column (1) and The beams (2) form a frame, the beams (2) are distributed in two directions, transverse and longitudinal, and the four beams (2) connected end to end form a beam lattice, and each beam lattice is provided with the hyperbola The dome shell (4), the upper surface and the lower surface of the double-curvature dome shell (4) are both in the shape of a double-curvature arch, and the edges of the double-curvature dome shell (4) are respectively connected with the edges of the four beams (2). The side surfaces are fixedly connected; the filling layer (3) covers the double-curved arch shell (4), and the top surface of the filling layer (3) is flat. 2 . The floor structure with a double-curved arch shell according to claim 1 , wherein a panel ( 5 ) is further provided on the filling layer ( 3 ). 3 . 3. A floor structure with a double-curved arch shell according to claim 1, characterized in that the ends of the reinforcing bars in the double-curved arch shell (4) are anchored inside the beam (2) . 4. A floor structure with a double-curved arch shell according to claim 1, characterized in that, the thickness of the middle of the double-curved arch shell (4) is smaller than the thickness of the edge. 5. A floor structure with a double-curved arch shell according to claim 1, characterized in that a protruding stiffening rib is fixed on the lower surface of the double-curved arch shell (4), and the stiffening rib is Extends horizontally and vertically in a grid pattern. 6 . The floor structure with a double-curved arch shell according to claim 5 , wherein the bottom surface of the stiffening rib is horizontal, and the stiffening rib is provided with prestressed steel bars. 7 . 7. A floor structure with a double-curved arch shell according to claim 1, characterized in that, the materials used for the filling layer (3) include slag, expanded perlite, aerated concrete, ceramsite concrete, At least one of sand, construction waste, and plain concrete. 8 . The floor structure with a double-curved arch shell according to claim 1 , wherein the material used for the double-curved arch shell ( 4 ) is reinforced concrete, fiber concrete or plain concrete. 9 . 9 . The floor structure with a double-curved arch shell according to claim 2 , wherein the material used for the panel ( 5 ) is reinforced concrete, fiber concrete, plain concrete or shotcrete. 10 . 10. A construction method of the floor structure with double-curved arch shell as described in any one of claims 1-9, mainly comprises the following steps: 1), for the column support form, pour the column (1); 2) For the formwork of the beam (2) and the double-curved arch shell (4), set the reinforcement cage of the beam (2) and the reinforcement of the double-curved arch shell (4). into the interior of the beam (2); 3), pouring beam (2) and double-curved arch shell (4); 4), laying the filling layer (3); 5) Bind the steel bars of the panel and pour the panel.

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