Concrete interface seawater flow effect and fatigue loading coupling device

Abstract

The utility model belongs to the technical field of concrete interface durability test equipment, and particularly relates to a concrete interface seawater flow effect and fatigue loading coupling device which comprises a base, supporting rods are fixedly connected to the four corners of the top face of the base, the top ends of the supporting rods are fixedly connected with the same top plate, and a fatigue test structure is arranged on the top face of the top plate. The movable end of the fatigue test structure extends into the saline solution environment box, lower supports are symmetrically and fixedly connected to the inner bottom wall of the saline solution environment box, a test piece is placed on the lower supports, and the test piece and the fatigue test structure are vertically and correspondingly arranged; a solution box is placed on one side of the top surface of the base, and the solution box is communicated with the saline solution environment box; electrode plates are mounted on two correspondingly arranged side walls in the saline solution environment box, one electrode plate is an anode, and the other electrode plate is a cathode. According to the utility model, the use state of the bridge under the action of seawater and load coupling environment can be analyzed, and the safety performance of the bridge structure can be truly and comprehensively evaluated.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete interface durability test equipment, and particularly relates to a coupling device for the action of seawater flow and fatigue loading on a concrete interface. Background Technique

[0002] Ultra-high performance concrete (UHPC) is increasingly applied to ordinary concrete structures, and the bonding performance of the UHPC-NC interface is one of the key factors restricting the use of UHPC.

[0003] In a marine environment, concrete structures not only suffer from the erosion of seawater but also face the water flow impact caused by waves, tides, etc. and long-term fatigue loading. Under the combined action of these factors, the deterioration of concrete will be accelerated. When the seawater flow erosion and fatigue loading exist simultaneously, a coupling effect will occur between the two, exacerbating the deterioration of the concrete structure. Fatigue loading will accelerate the penetration of chloride ions, and the presence of chloride ions will reduce the fatigue resistance of concrete. This mutually promoting negative effect makes the durability and safety of concrete structures in a marine environment a major challenge. However, traditional instruments for simulating the damage process and failure characteristics of concrete by erosive substances cannot meet the requirement of synchronism in the experimental process. Content of the Utility Model

[0004] The purpose of the utility model is to provide a coupling device for the action of seawater flow and fatigue loading on a concrete interface to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] A coupling device for the action of seawater flow and fatigue loading on a concrete interface, comprising: a base, four corners of the top surface of the base are fixedly connected with support rods, the top ends of the support rods are fixedly connected with the same top plate, a fatigue test structure is arranged on the top plate, the movable end of the fatigue test structure extends into the salt solution environment box, the salt solution environment box is installed on the base through a reaction frame, lower supports are symmetrically and fixedly connected to the inner bottom wall of the salt solution environment box, a test specimen is placed on the lower supports, and the test specimen is vertically arranged corresponding to the fatigue test structure;

[0007] A solution box is placed on one side of the top surface of the base, and the solution box is communicated with the salt solution environment box;

[0008] Electrode plates are installed on two corresponding side walls inside the salt solution environment box, one of the electrode plates is an anode and the other electrode plate is a cathode.

[0009] Preferably, the fatigue test structure includes a servo motor, which is installed in the middle of the top surface of the top plate. The output end of the servo motor is fixedly connected to a pressure rod, and the other end of the pressure rod is fixedly connected to a pressure head. Two upper supporting seats are symmetrically and fixedly connected to the bottom surface of the pressure head. The test specimen is located between the upper supporting seat and the lower support.

[0010] Preferably, the water outlet end on one side of the top surface of the solution tank is communicated with the water inlet end of a water inlet pipe. The water outlet end of the water inlet pipe extends into the salt solution environment tank. The water outlet end of the salt solution environment tank is communicated with the water inlet end of a water outlet pipe, and the water outlet end of the water outlet pipe is communicated with the top surface of the solution tank.

[0011] Preferably, a baffle is fixedly connected inside the solution tank. The baffle divides the solution tank into a solution storage cavity and a waste liquid storage cavity. The solution storage cavity is communicated with the water inlet pipe, and the waste liquid storage cavity is communicated with the water outlet pipe.

[0012] Preferably, a water pump is arranged in the solution storage cavity.

[0013] Preferably, a water outlet is opened in the middle of the bottom surface of the salt solution environment tank, and a sealing plug is hermetically clamped at the water outlet.

[0014] Preferably, the salt solution environment tank is made of a transparent material, and scales are arranged on the outer wall of the salt solution environment tank.

[0015] Compared with the prior art, the present utility model has the following advantages and technical effects:

[0016] The present utility model can simulate the fatigue effect generated by the repeated action of vehicle loads on a bridge, so as to analyze the use state of the bridge under environmental effects and can truly and comprehensively evaluate the safety performance of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0018] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0019] Figure 2 It is a front view of the partial structure of Embodiment 1 of the present utility model;

[0020] Figure 3 It is Figure 2 a side view of

[0021] Figure 4 It is a sectional view of the solution tank;

[0022] Figure 5 It is a schematic diagram of the test specimen of the present utility model;

[0023] Figure 6 It is a schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0024] Figure 7 It is the front view of the partial structure of Embodiment 2 of the utility model;

[0025] Figure 8 It is an exploded view of the wave-making structure of Embodiment 2;

[0026] Figure 9 It is the front view of the wave-making structure of Embodiment 3;

[0027] Wherein, 1, base; 2, support rod; 3, top plate; 4, fatigue test structure; 5, salt solution environment box; 6, wave-making structure; 7, solution tank; 8, water flow simulation control device; 9, fatigue control device; 10, data control device; 11, test specimen; 12, lower support; 13, electrode plate; 14, reaction frame; 401, servo motor; 402, pressure rod; 403, pressure head; 404, upper top seat; 601, wave-making motor; 602, rotating shaft; 603, spiral plate; 604, fixed support; 605, fixed shaft; 606, wave-making plate; 701, water inlet pipe; 702, water outlet pipe; 703, sealing plug; 704, baffle; 705, water pump. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] To make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Embodiment 1:

[0031] Refer to Figures 1 to 5, this embodiment discloses a coupling device for the action of seawater flow and fatigue loading on a concrete interface, comprising: a base 1, support rods 2 are fixedly connected to the four corners of the top surface of the base 1, the top ends of the support rods 2 are fixedly connected to the same top plate 3, a fatigue test structure 4 is provided on the top plate 3, the movable end of the fatigue test structure 4 extends into the salt solution environment box 5, the salt solution environment box 5 is installed on the base 1 through a reaction frame 14, lower supports 12 are symmetrically and fixedly connected to the inner bottom wall of the salt solution environment box 5, a test specimen 11 is placed on the lower supports 12, and the test specimen 11 is vertically corresponding to the fatigue test structure 4;

[0032] A solution tank 7 is placed on one side of the top surface of the base 1, and the solution tank 7 is communicated with the salt solution environment box 5; a box door is rotatably connected to the front end of the salt solution environment box 5, through which the salt solution environment box 5 can form a closed space and is convenient for placing or taking out the test specimen 11.

[0033] Electrode plates 13 are installed on two corresponding side walls inside the salt solution environment box 5, one of the electrode plates 13 is an anode and the other electrode plate 13 is a cathode. The electrode plates 13 are used to evaluate the ability of the concrete to resist chloride ion penetration. In the test, the test specimen 11 is placed between one end containing a chloride solution and the other end of a buffer solution, and the electrode plates 13 are used to apply a voltage. When an electric current passes through, chloride ions migrate from the anode to the cathode under the action of the electric field, thereby pushing the chloride ions through the concrete specimen. By measuring the current and time passing through the specimen, the electric flux of the concrete can be calculated, and thus its chloride ion penetration resistance performance can be reflected.

[0034] In a further optimized solution, the fatigue test structure 4 includes a servo motor 401, the servo motor 401 is installed in the middle of the top surface of the top plate 3, the output end of the servo motor 401 is fixedly connected to a pressure rod 402, the other end of the pressure rod 402 is fixedly connected to a pressure head 403, and two upper top seats 404 are symmetrically and fixedly connected to the bottom surface of the pressure head 403. The test specimen 11 is located between the upper top seats 404 and the lower supports 12.

[0035] In a further optimized solution, the water outlet end on one side of the top surface of the solution tank 7 is communicated with the water inlet end of a water inlet pipe 701, the water outlet end of the water inlet pipe 701 extends into the salt solution environment box 5, and the water outlet end of the salt solution environment box 5 is communicated with the water inlet end of a water outlet pipe 702. The water outlet end of the water outlet pipe 702 is communicated with the top surface of the solution tank 7.

[0036] In a further optimized solution, a baffle 704 is fixedly connected inside the solution tank 7. The baffle 704 divides the solution tank 7 into a solution storage chamber and a waste liquid storage chamber. The solution storage chamber is communicated with the water inlet pipe 701, and the waste liquid storage chamber is communicated with the water outlet pipe 702. One solution tank 7 is divided into two cavities, which can store the solution to be used and the waste liquid that has been used at the same time, with complete functions.

[0037] For a further optimized solution, a water pump 705 is provided inside the solution storage cavity. The water pump 705 is used to pump water so that the solution enters the inside of the salt solution environment box 5.

[0038] For a further optimized solution, a water outlet is provided in the middle of the bottom surface of the salt solution environment box 5, and a sealing plug 703 is hermetically clamped at the water outlet. During use, the sealing plug 703 is pulled out, and the water outlet pipe 702 is inserted into the water outlet to drain the waste liquid into the waste liquid storage cavity.

[0039] For a further optimized solution, the salt solution environment box 5 is made of a transparent material, and scales are provided on the outer wall of the salt solution environment box 5.

[0040] For a further optimized solution, a deflection collector is provided in the middle of the bottom surface of the test specimen 11, and a displacement and strain measuring instrument is provided on the side surface of the test specimen 11. The deflection collector and the displacement and strain measuring instrument are electrically connected to the data control device 10, and the data control device 10 is located on one side of the base 1. The deflection collector and the displacement and strain measuring instrument are respectively used to collect the deflection change and displacement change of the test specimen 11 during the loading process and transmit them to the corresponding control device.

[0041] A solution detector for detecting the solution state inside the salt solution environment box 5 is fixedly connected to the inner top wall of the salt solution environment box 5. The solution detector is electrically connected to the water flow simulation control device 8, and the water flow simulation control device 8 is located on the other side of the base 1.

[0042] The servo motor 401 is electrically connected to the fatigue control device 9. The fatigue control device 9 is located on the base 1. The data control device 10, the fatigue control device 9, and the water flow simulation control device 8 are electrically connected to the total controller.

[0043] During use, a solution is introduced. The temperature of the solution is normal temperature, 10 - 30 °C, and the height of the solution inside the salt solution environment box 5 is 5 cm above the test specimen.

[0044] Example 2:

[0045] As Figures 6 - 8 shown, the difference between this embodiment and Embodiment 1 is only that: a wave-making structure 6 is provided inside the salt solution environment box 5. The wave-making structure 6 includes two fixed supports 604 installed on the inner top wall of the salt solution environment box 5. The two fixed supports 604 are symmetrically arranged, and a fixed shaft 605 is fixedly connected between the two fixed supports 604. A plurality of wave-making plates 606 are rotatably sleeved on the outside of the fixed shaft 605;

[0046] A wave-making motor 601 is fixedly connected to the middle of the outer side wall of the salt solution environment box 5. The output shaft of the wave-making motor 601 is hermetically rotationally connected to the salt solution environment box 5. The output shaft of the wave-making motor 601 is shaft-connected to a rotating shaft 602, and a spiral plate 603 is fixedly connected to the outside of the rotating shaft 602. The wave-making plate 606 is in contact with the spiral plate 603.

[0047] When the wave-making motor 601 is started, the rotating shaft 602 rotates. At this time, the spiral plate 603 rotates synchronously with the rotating shaft 602. Since the spiral plate 603 is in contact with the wave-making plate 606, it can drive the wave-making plate 606 to move in a wave-like manner, thereby making the solution generate waves, and the erosion effect on the concrete structure under the real seawater environment can be simulated.

[0048] Embodiment 3:

[0049] As Figure 9 shown, the difference between this embodiment and Embodiment 1 is only that: a wave-making structure 6 is provided in the salt solution environment box 5. The wave-making structure 6 includes a hinge seat installed on the inner side wall of the upper part of the salt solution environment box 5. A wave-making plate is hinged on the hinge seat. A camshaft is rotatably connected to the inner side wall of the lower part of the salt solution environment box 5. A cam is fixedly connected to the middle of the camshaft. One end of the camshaft is rotatably connected to the inner side wall of the salt solution environment box 5. The other end of the camshaft is axially connected to the output shaft of the rotating motor. The rotating motor is installed on the outer side wall of the salt solution environment box 5. The cam is in contact with the wave-making plate. When the rotating motor is started, it drives the camshaft to rotate, and then drives the cam to rotate. The cam drives the wave-making plate to make waves.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0051] The above-described embodiments are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for coupling seawater flow action and fatigue loading on a concrete interface, characterized in that: include: A base (1), wherein the four corners of the top surface of the base (1) are fixedly connected to support rods (2), the top ends of the support rods (2) are fixedly connected to the same top plate (3), a fatigue test structure (4) is provided on the top plate (3), the movable end of the fatigue test structure (4) extends into the interior of a salt solution environment box (5), the salt solution environment box (5) is mounted on the base (1) via a reaction frame (14), a lower support (12) is symmetrically fixedly connected to the inner bottom wall of the salt solution environment box (5), a test specimen (11) is placed on the lower support (12), and the test specimen (11) is arranged vertically corresponding to the fatigue test structure (4); A solution box (7) is placed on one side of the top surface of the base (1), and the solution box (7) is connected to the salt solution environment box (5); Electrode plates (13) are installed on two corresponding side walls inside the salt solution environment box (5), one of the electrode plates (13) is an anode, and the other electrode plate (13) is a cathode.

2. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 1, characterized in that: The fatigue test structure (4) comprises a servo motor (401), wherein the servo motor (401) is mounted in the middle of the top surface of the top plate (3), the output end of the servo motor (401) is fixedly connected to a pressure rod (402), the other end of the pressure rod (402) is fixedly connected to a pressure head (403), the bottom surface of the pressure head (403) is symmetrically fixedly connected to two upper top seats (404), and the test specimen (11) is located between the upper top seat (404) and the lower support (12).

3. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 1, characterized in that: The water outlet end on one side of the top surface of the solution tank (7) is connected to the water inlet end of the water inlet pipe (701), the water outlet end of the water inlet pipe (701) extends into the interior of the salt solution environment tank (5), the water outlet end of the salt solution environment tank (5) is connected to the water inlet end of the water outlet pipe (702), and the water outlet end of the water outlet pipe (702) is connected to the top surface of the solution tank (7).

4. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 3 is characterized in that: A baffle (704) is fixedly connected to the interior of the solution box (7), and the baffle (704) divides the solution box (7) into a solution storage chamber and a waste liquid storage chamber. The solution storage chamber is connected to the water inlet pipe (701), and the waste liquid storage chamber is connected to the water outlet pipe (702).

5. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 4, characterized in that: A water pump (705) is provided in the solution storage chamber.

6. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 1, characterized in that: A water outlet is provided in the middle of the bottom surface of the salt solution environment box (5), and a sealing plug (703) is provided on the water outlet sealing card.

7. The device for coupling seawater flow action and fatigue loading on a concrete interface according to claim 1, characterized in that: The salt solution environment box (5) is made of a transparent material, and a scale is provided on the outer wall of the salt solution environment box (5).

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