Double-steel-plate concrete combined structure adopting shear-non-pulling-resistant connecting piece and construction method thereof
阅读说明：本技术 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 (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侧均设置有多个抗剪-不抗拔连接件；所述抗剪-不抗拔连接件包括：钉杆；所述钉杆的底部与所述外侧钢板筒或内侧钢板筒的内侧连接；所述钉杆的表面涂覆有特殊脱模剂。应用本发明可以有效地释放温度效应作用下钢与混凝土之间的组合作用,使内填混凝土不产生裂缝。(The invention provides a double-steel-plate concrete composite structure adopting a shear-non-pulling-resistant connecting piece and a construction method thereof. The double steel plate-concrete composite structure includes: 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 sides of the outer steel plate cylinder and the inner steel plate cylinder are respectively provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces; the shear-non-pullout connector includes: a nail rod; the bottom of the nail rod is connected with the inner side of the outer side steel plate cylinder or the inner side steel plate cylinder; the surface of the nail rod is coated with a special release agent. The invention can effectively release the combined action between the steel and the concrete under the action of temperature effect, so that the filled concrete does not generate cracks.)
1. A double steel plate-concrete composite structure using a shear-not-pull connector, comprising: 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 sides of the outer steel plate cylinder and the inner steel plate cylinder are respectively provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces;
the shear-non-pullout connector includes: a nail rod;
the bottom of the nail rod is connected with the inner side of the outer side steel plate cylinder or the inner side steel plate cylinder; the surface of the nail rod is coated with a special release agent.
2. The double steel plate-concrete composite structure according to claim 1, wherein:
the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder are coated with special release agents.
3. A construction method of a double-steel-plate-concrete combined structure adopting a shear-non-pull-resistant connecting piece is characterized by comprising the following steps:
respectively calculating the size and the arrangement distance of the shearing-resisting and non-pulling-resisting 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 shearing-resisting and non-pulling-resisting connecting piece on the inner sides of the outer steel plate cylinder and the inner steel plate cylinder;
coating a special release agent on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder;
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 a double-steel-plate concrete composite structure adopting a shear-non-pull-resistant connecting piece and a construction method thereof.
Background
The steel-concrete combined structure reasonably combines steel and concrete through the shear connector to form a common stressed whole, fully exerts the material characteristics of the steel and the concrete, and is widely used due to the reasonability of the stress performance, the economical efficiency of materials and the superiority of the whole structure. As an important combined structure form, the double-steel-plate-concrete combined structure has the advantages in multiple aspects: convenient construction, reliable stress, water and seepage prevention, etc.
The connecting piece is the guarantee that the steel and the concrete play a combined role and provide indispensable guarantee. The form of the connecting member is numerous, and the design goal of the general connecting member is to realize complete bonding of the steel and the concrete, namely, not only to transmit the shearing force at the interface, but also to prevent the situation that the steel and the concrete are lifted due to the separation of the interface. In addition to being fully bonded, there are connectors that provide only a restraint perpendicular to the steel-concrete interface to prevent cracking of the concrete in the hogging moment zone, and a release of the restraint along the steel-concrete interface due to the presence of the hogging moment zone in the structure.
With the wide application of the structural form of the annular steel plate-wrapped composite shear wall, new requirements are also put forward on the connecting piece. At elevated temperatures, if the connection between the steel and the concrete is a perfect bond, the concrete inside will develop tensile strain with increasing temperature and will crack when it exceeds the cracking strain.
Therefore, a new structural form is needed to release the combined action between steel and concrete under the effect of temperature, so that the filled concrete does not crack.
Disclosure of Invention
In view of the above, the present invention provides a double steel plate-concrete composite structure using a shear-non-pull connector and a construction method thereof, so that the composite action between steel and concrete under the action of temperature effect can be effectively released, and cracks are not generated in the filled concrete.
The technical scheme of the invention is realized as follows:
a double steel plate-concrete composite structure using a shear-not-pull connector, the double steel plate-concrete composite structure comprising: 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 sides of the outer steel plate cylinder and the inner steel plate cylinder are respectively provided with a plurality of shearing-resistant and non-pulling-resistant connecting pieces;
the shear-non-pullout connector includes: a nail rod;
the bottom of the nail rod is connected with the inner side of the outer side steel plate cylinder or the inner side steel plate cylinder; the surface of the nail rod is coated with a special release agent.
Preferably, the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder are further coated with a special release agent.
The invention also provides a construction method of the double-steel-plate concrete composite structure by adopting the shearing-non-pulling-resistant connecting piece, which comprises the following steps:
respectively calculating the size and the arrangement distance of the shearing-resisting and non-pulling-resisting 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 shearing-resisting and non-pulling-resisting connecting piece on the inner sides of the outer steel plate cylinder and the inner steel plate cylinder;
coating a special release agent on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder;
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 at the inner sides 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.
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 scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and 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
the inner sides of the outer
the shear-no-
the bottom of the
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, an outer steel plate, an inner filled concrete, and a shear-non-pulling resistant connector which makes the two exert a combined action.
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 sides 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.
Furthermore, in a preferred embodiment of the present invention, the inner surfaces of the outer steel cylinder and the inner steel cylinder are further coated with a special release agent 22.
Because the special release agents with preset thicknesses are coated on the inner side of the outer steel plate cylinder and the inner surface of the inner steel plate cylinder, the normal rigidity of the contact surface of the steel plate and the concrete is very weak, and the steel plate has almost no pulling resistance, so that the concrete and the steel plate can relatively slide along the direction, but the steel plate has strong shearing resistance, and the concrete and the steel plate still have strong integrity. Therefore, the good working performance can be ensured under the action of temperature and out-of-plane impact load.
In addition, the technical scheme of the invention also provides a construction method of the double-steel-plate concrete composite structure adopting the shear-non-pull-resistant connecting piece.
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 and the arrangement distance of the shearing-non-shearing 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 sides of the outer steel plate cylinder and the inner steel plate cylinder according to the calculation result.
The process of the step can be completed in a factory, and the outer steel plate cylinder and the inner steel plate cylinder are transported to a construction site after the completion.
And
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) because the concrete and the steel plate can relatively slide along the normal direction of the contact surface, the hoop tensile stress in the concrete can be effectively released when the temperature rises, and the cracking of the filled concrete is prevented;
(2) due to the adoption of the double-steel-plate-concrete combined structure, when the double-steel-plate-concrete combined structure is subjected to the action of an out-of-plane impact load, the bearing capacity and the rigidity of the double-steel-plate combined structure exceed those of the traditional structure with the same steel content, and meanwhile, the double-steel-plate combined structure can resist seepage and crack;
(3) the connecting piece has simple structure and convenient material taking, and the shearing-non-pulling resistant connecting piece is welded on the steel plate in a factory in advance, so that concrete can be poured after special release agents are coated on the inner surfaces of the outer steel plate cylinder and the inner steel plate cylinder and the surface of the nail rod in a construction site, and the method is quick and convenient;
(4) 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 transfer the shearing force, so that the steel plate has stronger shearing resistance, and the concrete and the steel plate still have stronger integrity.
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.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种索膜协同作用的大曲率索膜结构