阅读说明：本技术 采用抗剪-不抗拔连接件的双钢板-混凝土组合结构及其施工方法 (Double-steel-plate concrete combined structure adopting shear-non-pulling-resistant connecting piece and construction method thereof ) 是由 樊健生 孔思宇 孙运轮 于 2019-10-28 设计创作，主要内容包括：本发明提供了一种采用抗剪-不抗拔连接件的双钢板-混凝土组合结构及其施工方法。该双钢板-混凝土组合结构包括：外侧钢板筒和内侧钢板筒；所述外侧钢板筒和内侧钢板筒之间填充有混凝土；所述外侧钢板筒和内侧钢板筒的内表面上均设置有多个抗剪-不抗拔连接件；所述抗剪-不抗拔连接件包括：钉杆和钉帽；所述钉杆的底部与所述外侧钢板筒或内侧钢板筒的内表面连接；所述钉帽设置在所述钉杆的顶部。应用本发明可以有效地释放由于温度升高时在混凝土中产生的环向拉应力,防止内填混凝土开裂。(The invention provides double-steel-plate-concrete composite structures adopting shear-non-pulling resistant connecting pieces and a construction method thereof.)

1, kinds of double steel plate-concrete composite structure using shear-not pulling resistant connector, characterized in that, the double steel plate-concrete composite structure includes an outside steel plate cylinder and an inside steel plate cylinder;

concrete is filled between the outer steel plate cylinder and the inner steel plate cylinder;

the inner surfaces of the outer side steel plate cylinder and the inner side steel plate cylinder are both provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces;

the shear-non-pullout connector includes: a nail rod and a nail cap;

the bottom of the nail rod is connected with the inner surface of the outer side steel plate cylinder or the inner side steel plate cylinder; the nail cap is arranged at the top of the nail rod.

2. The double steel plate-concrete composite structure according to claim 1, wherein:

and soft foaming materials with preset thickness are further arranged on the top of the nail cap and the inner surfaces of the outer side steel plate cylinder and the inner side steel plate cylinder.

3, construction method of double steel plate-concrete composite structure using shear-not-pulling resistant connector, characterized in that, the construction method includes the following steps:

respectively calculating the size, the arrangement distance and the thickness of the soft foaming material of the shear-resistant and non-pull-resistant connecting piece according to the temperature rise degree of the inner steel plate cylinder and the value of the out-of-plane load;

according to the calculation result, welding the anti-shearing-non-anti-pulling connecting piece on the inner surfaces of the outer side steel plate cylinder and the inner side steel plate cylinder;

soft foaming materials with preset thickness are bonded on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder and the top of the nail cap;

fixing and installing the outer steel plate cylinder and the inner steel plate cylinder as templates filled with concrete;

and concrete is poured between the outer steel plate cylinder and the inner steel plate cylinder to form a double steel plate-concrete combined structure adopting the shear-non-pulling resistant connecting piece.

Technical Field

The application relates to the technical field of structural engineering, in particular to double-steel-plate concrete composite structures adopting shear-non-pull-resistant connecting pieces and a construction method thereof.

Background

The double-steel-plate-concrete combined structure is types of structures which enable concrete and steel plates between the steel plates to play a combined role through different forms of connecting pieces such as studs, angle steels and the like between the two steel plates and resist the external action together, at present, the double-steel-plate-concrete combined structure has been applied to large-scale projects such as nuclear power station containment vessels, large silos, seabed containers, immersed tube tunnels and the like due to excellent mechanical properties.

Compared with the traditional structure form, the double-steel-plate-concrete combined structure has the advantages in multiple aspects: the cost of the steel structure is high, and the construction difficulty is high; the reinforced concrete structure is easy to crack; the construction of the prestressed concrete structure is complicated, and the prestress is gradually lost to lower the structural reliability.

At present, the connection between the double steel plate-concrete combined structure adopts complete connection, and the deformation between the steel and the concrete is ensured, however, the problem of is also existed in the form.

Therefore, it is necessary to propose novel double steel plate-concrete combined structure forms, which can locally release the combined action between steel and concrete under the action of temperature, so that the filled concrete does not generate cracks, but can still exert the combined action between steel and concrete under constant and live load and even out-of-plane impact dynamic load to work synergistically.

Disclosure of Invention

In view of this, the present invention provides double steel plate-concrete composite structures using shear-non-pull connectors and a construction method thereof, so that hoop tensile stress generated in concrete due to temperature increase can be effectively released, and cracking of the infill concrete can be prevented.

The technical scheme of the invention is realized as follows:

double steel plate-concrete composite structure using shear-not-pulling connector, which comprises an outer steel plate cylinder and an inner steel plate cylinder;

concrete is filled between the outer steel plate cylinder and the inner steel plate cylinder;

the inner surfaces of the outer side steel plate cylinder and the inner side steel plate cylinder are both provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces;

the shear-non-pullout connector includes: a nail rod and a nail cap;

the bottom of the nail rod is connected with the inner surface of the outer side steel plate cylinder or the inner side steel plate cylinder; the nail cap is arranged at the top of the nail rod.

Preferably, soft foaming materials with preset thickness are further arranged on the top of the nail cap and the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder.

The invention also provides construction methods of the double steel plate-concrete composite structure adopting the shear-non-pulling resistant connecting piece, which comprises the following steps:

respectively calculating the size, the arrangement distance and the thickness of the soft foaming material of the shear-resistant and non-pull-resistant connecting piece according to the temperature rise degree of the inner steel plate cylinder and the value of the out-of-plane load;

according to the calculation result, welding the anti-shearing-non-anti-pulling connecting piece on the inner surfaces of the outer side steel plate cylinder and the inner side steel plate cylinder;

soft foaming materials with preset thickness are bonded on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder and the top of the nail cap;

fixing and installing the outer steel plate cylinder and the inner steel plate cylinder as templates filled with concrete;

and concrete is poured between the outer steel plate cylinder and the inner steel plate cylinder to form a double steel plate-concrete combined structure adopting the shear-non-pulling resistant connecting piece.

As can be seen from the above, in the double steel plate-concrete composite structure using the shear-non-pulling resistant connector and the construction method thereof according to the present invention, since a plurality of shear-non-pulling resistant connectors are provided on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder, the concrete between the two steel plates and the steel plates can relatively slide (can relatively slide in the thickness direction) in the normal direction of the contact surface, so that the hoop tensile stress generated in the concrete due to the temperature increase can be effectively released, and the crack of the infill concrete can be prevented; meanwhile, the shear-non-pull resistant connecting piece also has stronger shear resistance, so that the concrete and the steel plate still have stronger integrity. In addition, the shear-non-pull resistant connecting piece is also provided with the nail cap, so that outward bulging of the steel plate can be effectively restrained, and the local buckling load of the steel plate is improved.

Drawings

Fig. 1 is a schematic structural view of a double steel plate-concrete composite structure using a shear-non-pulling connector according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a shear-no-pull connector in an embodiment of the present invention.

Fig. 3 is a schematic flow chart illustrating a construction method of a double steel plate-concrete composite structure using a shear-non-pulling connector according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution and advantages of the present invention more apparent, the present invention is further illustrated in in detail with reference to the accompanying drawings and the specific embodiments.

Fig. 1 is a schematic structural view of a double steel plate-concrete composite structure using a shear-non-pullout connector according to an embodiment of the present invention, and fig. 2 is a schematic structural view of a shear-non-pullout connector according to an embodiment of the present invention. As shown in fig. 1 and 2, the double steel plate-concrete composite structure using the shear-non-pulling connector according to the embodiment of the present invention specifically includes: an outer steel plate cylinder 11 and an inner steel plate cylinder 12;

concrete 13 is filled between the outer steel plate cylinder 11 and the inner steel plate cylinder 12;

the inner surfaces of the outer steel plate cylinder 11 and the inner steel plate cylinder 12 are respectively provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces 14;

the shear-no-pull connector 14 includes: a nail rod 21 and a nail cap 22;

the bottom of the nail rod 21 is connected with the inner surface of the outer steel plate cylinder 11 or the inner steel plate cylinder 12; the nail cap 22 is arranged on the top of the nail rod 21.

Therefore, it can be seen that the above-mentioned double steel plate-concrete composite structure using the shear-non-pulling resistant connector is composed of an inner steel plate and an outer steel plate, a filling concrete, and a shear-non-pulling resistant connector with a nut for combining the two.

Compared with the fully bonded double steel plate-concrete combined structure in the prior art, the double steel plate-concrete combined structure adopting the shear-non-pulling resistant connecting piece with the nail cap has the advantages that as the plurality of shear-non-pulling resistant connecting pieces are arranged on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder, the concrete and the steel plates between the two steel plates can slide relatively (can slide relatively along the thickness direction) along the normal direction of a contact surface, so that the hoop tensile stress generated in the concrete when the temperature rises can be effectively released, and the cracking of the filled concrete can be prevented; meanwhile, the shear-non-pull resistant connecting piece also has stronger shear resistance, so that the concrete and the steel plate still have stronger integrity. In addition, the shear-non-pull resistant connecting piece is also provided with the nail cap, so that outward bulging of the steel plate can be effectively restrained, and the local buckling load of the steel plate is improved.

In addition, , in preferred embodiments of the present invention, the top of the nail cap 22 and the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder are further provided with a soft foaming material 23 with a preset thickness.

Because the soft foaming materials with preset thicknesses are arranged (for example, adhered) on the inner surface of the outer steel plate cylinder, the inner surface of the inner steel plate cylinder and the nail caps, the normal rigidity of the contact surface of the steel plates and the concrete is very weak, and the steel plates hardly have the pulling resistance, so that the concrete and the steel plates can relatively slide along the direction, but have stronger shearing resistance, and the concrete and the steel plates still have stronger integrity. Therefore, the good working performance can be ensured under the action of temperature and out-of-plane impact load.

In addition, the invention also provides construction methods of the double-steel-plate concrete composite structure adopting the shear-non-pull connecting piece in the technical scheme.

Fig. 3 is a schematic flow chart illustrating a construction method of a double steel plate-concrete composite structure using a shear-non-pulling connector according to an embodiment of the present invention. As shown in fig. 3, the construction method of the double steel plate-concrete composite structure using the shear-non-pulling connector according to the present invention includes the steps of:

and 301, respectively calculating the size, the arrangement distance and the thickness of the soft foaming material of the shear-resistant and non-shear-resistant connecting piece according to the temperature rise degree of the inner steel plate cylinder and the value of the out-of-plane load.

And 302, welding the anti-shearing-non-anti-pulling connecting piece on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder according to the calculation result.

And step 303, bonding soft foaming materials with preset thickness on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder and on the top of the nail cap.

The steps 302 and 303 may be performed in a factory, and the outer steel plate cylinder and the inner steel plate cylinder may be transported to a construction site after completion of the steps.

And step 304, fixing and installing the outer steel plate cylinder and the inner steel plate cylinder as templates filled with concrete.

And 305, pouring concrete between the outer steel plate cylinder and the inner steel plate cylinder to form a double steel plate-concrete combined structure adopting the shear-non-pull-resistant connecting piece.

Through the steps 301 to 305, the double-steel-plate and concrete combined structure adopting the shear-non-pull resistant connecting piece can be completed.

In summary, compared with the prior art, the technical scheme of the invention has the following advantages:

(1) due to the adoption of the double-steel-plate and concrete combined structure, when the composite material is subjected to the action of an out-of-plane impact load, the bearing capacity and the rigidity of the composite material exceed those of the traditional structure with the same steel content, and the composite material can resist seepage and crack;

(2) when the steel plate is subjected to an out-of-plane impact load, shearing force is generated between the steel plate and the concrete interface, and the shearing force-non-pulling-resistant connecting piece can effectively transmit the shearing force, so that the steel plate has stronger shearing resistance and the concrete and the steel plate still have stronger integrity;

(3) because the concrete and the steel plate can relatively slide along the normal direction of the contact surface, the hoop tensile stress generated in the concrete when the temperature is increased can be effectively released, and the cracking of the filled concrete is prevented;

(4) the shear-non-pulling-resistant connecting piece is provided with the nail cap, so that outward bulging of the steel plate can be effectively restrained, and the local buckling load of the steel plate is improved;

(5) the connecting piece has simple structure and convenient material taking, the shearing-non-pulling resistant connecting piece is welded on the steel plate in a factory in advance, and the soft foaming material is bonded on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder and the surface of the nail cap, so that the concrete is only needed to be poured on the construction site, and the method is quick and convenient.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.