A tension-resistant and compression-only steel plate-concrete composite wall tie system

Abstract

The present invention discloses a tension-resistant steel plate concrete composite wall tension system, including: steel tie rods, which are arranged in rows and columns inside the concrete, and both ends thereof are inserted through two oppositely arranged steel panels. Tightening nuts are respectively screwed at both ends of the steel tie rods, and spring washers are crimped between the tightening nuts and the steel panels; steel sleeves, there are multiple steel sleeves, and they are respectively sleeved on the corresponding steel tie rods, and both ends of the steel sleeves are in contact with the inner walls of the two steel panels. The present invention can completely transfer the pressure between the steel panels on both sides of the steel plate concrete composite wall, and effectively release the tension between the two steel panels, thereby greatly reducing the damage to the steel panels caused by external impact loads.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate concrete composite wall structures in nuclear power plants, and more specifically to a tension-resistant steel plate concrete composite wall tension system that resists compression but does not transmit tension. Background Art

[0002] During the design and construction of steel plate concrete composite wall structures in nuclear power plants, the tension system of the steel plate concrete composite wall is an important part to ensure the combined force of the steel panel and the core concrete. The tension system generally uses tension bars or truss structures composed of stiffeners, steel profiles, and tension steel strips. Since the general tension system is subject to the double constraints of the steel panels on both sides and the inner core concrete, it can transmit both tension and pressure between the steel panels. When the steel plate concrete composite wall in a nuclear power plant is subjected to a flying impact load on one side, in order to resist damage, the stress state of the tension system needs to be "resisting compression but not transmitting tension". However, the current general tension system cannot achieve the stress requirement of "resisting compression but not transmitting tension" under flying impact loads, so it often causes damage to the steel panels on both sides and reduces the service life of the steel panels.

[0003] Therefore, how to provide a tension system for a steel plate concrete composite wall in a nuclear power plant that can normally bear under flying impact loads, ensure that the steel panels on both sides are not damaged, and extend the service life of the steel panels is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a tension system for a steel plate concrete composite wall in a nuclear power plant that can normally bear under flying impact loads, ensure that the steel panels on both sides are not damaged, and extend the service life of the steel panels.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tension system for a steel plate concrete composite wall that resists compression but does not transmit tension, comprising:

[0007] Steel tie rods, which are arranged in rows and columns inside the concrete, and both ends thereof are penetrated through two oppositely arranged steel panels. Tightening nuts are respectively screwed at both ends of the steel tie rods, and spring washers are pressed between the tightening nuts and the steel panels;

[0008] Steel sleeves, there are multiple steel sleeves, and they are respectively sleeved on the corresponding steel tie rods, and both ends of the steel sleeves are in contact with the inner walls of the two steel panels.

[0009] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a tension-resistant and non-tension-transmitting tie system for a steel plate-concrete composite wall. Under the action of external impact loads, due to the relatively large axial stiffness of the steel casing and its contact only with the steel panel without welding fixation, it can effectively transmit the pressure between the two steel panels on both sides. Since spring washers are added between the steel tie rods and the steel panels, a certain amount of tension can be provided during the construction of pouring the inner core concrete. However, under the action of external impact loads, the spring washers can produce a certain amount of deformation, so the steel tie rods can release the internal tension between the two steel panels on both sides. Therefore, the present invention can completely transmit the pressure between the two steel panels of the steel plate-concrete composite wall and effectively release the tension between the two steel panels on both sides, thereby greatly reducing the damage of external impact loads to the steel panels, which is an effective supplement to the general tie system currently used in the steel plate-concrete composite wall of nuclear power plants.

[0010] Further, polytetrafluoroethylene material is filled between the steel casing and the steel tie rod. The frictional resistance between the steel casing and the steel tie rod can be reduced, which is conducive to the axial movement of the steel tie rod and the deformation of the spring washer, enabling the steel tie rod to release the internal tension between the two steel panels on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0012] Figure 1 The drawings are an axonometric structural schematic diagram of a tension-resistant and non-tension-transmitting tie system for a steel plate-concrete composite wall provided by the present invention.

[0013] Figure 2 The drawings are Figure 1 a top view structural schematic diagram of

[0014] Figure 3 The drawings are Figure 2 a structural enlarged schematic diagram of local A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0016] An embodiment of the present invention discloses a tension-resistant steel plate concrete composite wall tension system, including:

[0017] Steel tie rods 1 are arranged in rows and columns inside the concrete 100, and both ends thereof penetrate through two oppositely arranged steel panels 200. Fastening nuts 2 are screwed at both ends of the steel tie rods 1, and spring washers 3 are pressed between the fastening nuts 2 and the steel panels 200;

[0018] Steel sleeves 4 are multiple and are respectively sleeved on the corresponding steel tie rods 1, and both ends of the steel sleeves 4 are in contact with the inner walls of the two steel panels 200.

[0019] Polytetrafluoroethylene material 5 is filled between the steel sleeves 4 and the steel tie rods 1.

[0020] Under the action of external impact loads, due to the relatively large axial stiffness of the steel sleeves and only contacting but not welded and fixed to the steel panels, the pressure between the two side steel panels can be effectively transmitted. Since spring washers are added between the steel tie rods and the steel panels, a certain amount of tension can be provided during the construction of pouring the inner core concrete. However, under the action of external impact loads, the spring washers can produce a certain amount of deformation, so the steel tie rods can release the internal tension between the two side steel panels. Therefore, the present invention can completely transmit the pressure between the two side steel panels of the steel plate concrete composite wall and effectively release the tension between the two side steel panels, thereby greatly reducing the damage of external impact loads to the steel panels, which is an effective supplement to the general tension system used in the steel plate concrete composite wall of nuclear power plants at present.

[0021] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0022] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tension-resistant and non-compressive tie system for a steel plate-concrete composite wall, Characterized in that, It includes: Steel tie rods (1), the steel tie rods (1) are arranged in rows and columns inside the concrete (100), and both ends thereof are penetrated through two relatively arranged steel panels (200). Tightening nuts (2) are respectively screwed at both ends of the steel tie rods (1), and spring washers (3) are crimped between the tightening nuts (2) and the steel panels (200); Steel sleeves (4), there are multiple steel sleeves (4), and they are respectively sleeved on the corresponding steel tie rods (1), and both ends of the steel sleeves (4) are in contact with the inner walls of the two steel panels (200); Polytetrafluoroethylene material (5) is filled between the steel sleeve (4) and the steel tie rod (1), which can reduce the frictional resistance between the steel sleeve and the steel tie rod, facilitate the axial movement of the steel tie rod, and facilitate the deformation of the spring washer, so that the steel tie rod can release the internal tension between the two steel panels.

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