Vibration table test device for high concrete dam whole reservoir area model

Abstract

The invention provides a vibration table test device for a high concrete dam whole reservoir area model, and belongs to the technical field of test devices. The device comprises a ground beam system fixed on a vibration table; the outer frame is fixed on the ground beam system; the lower part of the internal oblique beam is fixedly connected with the ground beam system, and the periphery is fixedly connected with the external frame; the front and rear ends of the inner box body are fixedly connected with the front and rear ends of the outer frame, the left and right ends of the inner box body are fixedly connected with the inner oblique beams, and reservoir water is contained in the inner box body; the wave absorbing device is arranged at the tail end of the inner box body and used for preventing the reservoir water from overflowing; and the test model is fixed in the internal box body. The connecting device can be firmly connected with a large vibration table, is stable in force transmission, and can be freely disassembled. Dam-reservoir water-foundation interaction can be accurately simulated, and joint vibration of a dam body, bedrock and reservoir water is achieved. Meanwhile, the whole reservoir area of the high concrete dam can be simulated, and the integrity of the test model is guaranteed.

Description

Technical Field

[0001] The invention relates to a test device, in particular to a vibration table test device for a full reservoir model of a high concrete dam, and more particularly to a detachable vibration table test device for a large-scale high concrete dam model capable of realizing three-dimensional earthquake loading of the full reservoir area. Background Art

[0002] During an earthquake, the concrete in the weak parts of the dam is prone to local damage, cracking, or even through cracks; at the same time, the cracks in the bedrock may further expand and develop, seriously affecting the seismic safety of the dam. Therefore, the study of the dynamic response of the dam body and bedrock of a high concrete dam under earthquake action is of great significance to the safety of the high concrete dam.

[0003] At present, the shaking table test is the most effective method for earthquake engineering simulation research. However, due to the limitation of the size of the shaking table at present, it is impossible to conduct dynamic model tests on dam prototypes or large scales. The dynamic test models at present are generally only a few tenths or even a few hundredths of the geometric scale. Another problem with the dynamic model test of high concrete dams at present is that it is impossible to accurately simulate the interaction between dam-reservoir water and bedrock, and it is impossible to create an environment in which the dam and reservoir water can work together. The dam can only be vibrated with the shaking table alone, and the reservoir water and the mountains around the reservoir water cannot be vibrated together with the dam. Summary of the invention

[0004] In view of this, in order to create an environment where the dam body and reservoir water can work together, the present invention provides a vibration table test device for the whole reservoir area model of a high concrete dam, which can achieve a firm connection with a large vibration table, stable force transmission, and free disassembly. It can accurately simulate the interaction between the dam-reservoir water-foundation and realize the joint vibration of the dam body, bedrock and reservoir water. At the same time, it can simulate the whole reservoir area of ​​the high concrete dam to ensure the integrity of the test model.

[0005] To achieve the above object, the present invention provides the following technical solutions: A shaking table test device for a full reservoir model of a high concrete dam, comprising: a ground beam system, which is fixed to the shaking table; an external frame fixed to the ground beam system; An internal inclined beam, the lower part of which is fixedly connected to the ground beam system and the surrounding parts are fixedly connected to the external frame; The internal box is located inside the external frame, and its front and rear ends are respectively fixedly connected to the front and rear ends of the external frame, and its left and right ends are respectively fixedly connected to the internal inclined beam, and is used to hold reservoir water; A wave-breaking device, which is arranged at the end of the internal box body and is used to prevent the reservoir water from overflowing; A test model, which is fixed in the internal box; The external frame and the internal inclined beams together constitute a support system for the internal box.

[0006] Preferably, it also includes: The water injection and drainage device has one end connected to the external water source and the other end connected to the internal box.

[0007] Preferably, the drainage device is arranged on the lower side of the internal box body, and the two are connected by a flange.

[0008] Preferably, the ground beam system is stably connected to the vibration table via bolts.

[0009] Preferably, the lower portion of the external frame is fixedly connected to the ground beam system by bolts or welding.

[0010] Preferably, the lower portion of the internal inclined beam is connected to the ground beam system by bolts or welding.

[0011] Preferably, the internal box is connected to the external frame and the internal oblique beam by welding.

[0012] Preferably, the bottom steel plate of the internal box body is ribbed to ensure the bearing capacity of the steel plate while ensuring a stable connection between the test model and the internal box body.

[0013] Preferably, the wave absorbing device comprises: The supporting frame is connected to the end of the internal box body by bolts or welding, and a plastic perforated plate is inserted in the supporting frame.

[0014] Preferably, it also includes: A lifting lug is fixed on the outer frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The vibration table test device for the whole reservoir area model of a high concrete dam provided by the present invention can realize the vibration table test of the whole reservoir area model of a high concrete dam with different reservoir water depths, model sizes, and river valley terrains, can realize the stable connection and stable force transmission between the vibration table and the model, and can realize free disassembly, thereby improving the application scope of large vibration tables and the implementation environment of the whole reservoir area model test. It can accurately simulate the interaction between the dam, reservoir water, and foundation, and realize the joint vibration of the dam body, bedrock, and reservoir water. At the same time, the whole reservoir area of ​​the high concrete dam can be simulated to ensure the integrity of the test model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional axial side structure of the present invention; Figure 2 It is a schematic diagram of the top view structure of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure of the AA section; Figure 4 for Figure 3 Schematic diagram of the structure of the middle BB section; Figure 5 for Figure 3 Structural diagram of the middle CC section; Figure 6 A schematic diagram of one of the connection methods between the ground beam system and the shaking table; Figure 7 It is a schematic diagram of another connection method between the ground beam system and the shaking table; In the figure, 1. ground beam system; 1-1. single ground beam; 1-2. stiffening plate; 1-3. connecting screw; 1-4. connecting pad; 1-5. connecting bolt; 1-6. ground beam hole plate; 2. external frame; 3. internal inclined beam; 4. internal box; 5. wave-absorbing device; 6. water injection and drainage device; 7. lifting lug; 8. vibration table; 9. test model. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1-7As shown, the present invention provides a vibration table 8 test device for a high concrete dam full reservoir model, comprising: The ground beam system 1 is fixed on the vibration table 8, wherein the vibration table 8 can be a high-frequency vibration table 8. The ground beam system 1 is preferably a low-carbon alloy steel frame structure with a modular design. Its length, width and height are determined according to the specific size information of the vibration table 8, the distribution of the bolt holes of the vibration table 8 and the weight of the upper model. Its composition includes but is not limited to I-beams, H-beams and channel steels. Preferably, the ground beam system 1 is stably connected to the tabletop of the vibration table 8 by bolts by drilling holes on the flange of the lower chord ground beam channel steel of the ground beam system 1 and welding a connecting plate on the flange of the I-beam or H-beam; like Figure 6 As shown, one of the connection methods is: a hole is opened on the flange of a single ground beam 1-1, and a connecting screw 1-3 passes through the hole and the connecting pad 1-4 in sequence, and then is fastened by a connecting bolt 1-5, and the bearing capacity is increased by a stiffening plate 1-2; like Figure 7 As shown, another connection method is: a hole is opened on the lower flange of a single ground beam 1-1, and a connecting screw 1-3 passes through the hole, the connecting hole plate 1-6 and the connecting pad 1-4 in sequence, and then fastened by a connecting bolt 1-5; The external frame 2 is fixed on the ground beam system 1. The external frame 2 is preferably a low-carbon alloy steel frame and truss combined structure with modular design. Its length, width and height are determined according to the size of the test model 9, the size of the vibration table 8, the length of the reservoir water area and the water depth. Its composition includes but is not limited to H-shaped steel, box columns, round steel pipes, etc. The lower part is preferably connected to the upper chord ground beam of the ground beam system 1 by bolts or welding, and the internal part and the internal inclined beam 3 described below together form the support system of the internal box 4 described below; The internal inclined beam 3 is fixedly connected to the ground beam system 1 at the bottom and fixedly connected to the external frame 2 at the periphery. The internal inclined beam 3 is preferably a low-carbon alloy steel frame structure with a modular design. Its length, width, height, etc. are determined according to the size of the test model 9, water depth, etc. Its components include but are not limited to H-shaped steel, box-type columns, etc. The lower part is preferably connected to the upper chord ground beam of the ground beam system 1 by bolts or welding. The angle between the internal inclined beam 3 and the ground beam system 1 can be adjusted according to the requirements of the test model 9 to meet the test requirements; the periphery is preferably connected to the external frame 2 to form the support system of the following internal box body 4; The internal box 4 is located inside the external frame 2, and its front and rear ends are respectively fixedly connected to the front and rear ends of the external frame 2, and its left and right ends are respectively fixedly connected to the internal inclined beam 3, and the internal box 4 is used to hold reservoir water. The internal box 4 is preferably made of steel plates, and its interior is divided into two areas (for fixing the test model 9 and holding reservoir water, such as Figure 1As shown, the left area is used to hold reservoir water, and the right area is used to fix the test model 9). It is placed on the ground beam system 1 as a whole, and the front and rear sides are connected to the external frame 2, and the left and right sides are connected to the internal inclined beam 3. The external frame 2 and the internal inclined beam 3 together constitute the support system of the internal box 4. The steel plate of the internal box 4 is preferably connected to the external frame 2 and the internal inclined beam 3 by welding. The bottom steel plates of the two areas are ribbed to ensure the bearing capacity of the steel plate and the stable connection of the test model 9 with the internal box 4; The wave-breaking device 5 is arranged at the end of the internal box 4 to prevent the reservoir water from overflowing. The wave-breaking device 5 includes: The support frame is connected to the end of the internal box 4 by bolts or welding, and a plastic perforated plate is inserted inside the support frame.

[0021] Its length, height, width, etc. are determined according to the length and depth of the reservoir water. The wave absorbing device is preferably fixed at the end of the reservoir water area of ​​the internal box 4, and connected to the internal box 4 by bolts or welding. It is ensured that the reservoir water waves do not overflow the device when the device vibrates.

[0022] A test model 9, which is fixed in the internal box 4; The external frame 2 and the internal inclined beam 3 together constitute a support system for the internal box 4 .

[0023] The present invention also includes: The injection and drainage device 6 has one end connected to the external water source and the other end connected to the internal box body 4. The injection and drainage device 6 is preferably composed of a water pipe, a flange, a valve and a U-shaped hoop. The width of the water pipe is determined according to the depth of the reservoir water, and the layout position is determined according to the form of the vibration table 8 and the position of the reservoir, so as to ensure that the reservoir water area of ​​the internal box body 4 is at the shortest distance from the reservoir position. The injection and drainage device 6 is arranged on the lower side of the internal box body 4 (preferably the lower side of the bottom), and the two are connected by a flange; the internal box body 4 is connected to the valve through a water pipe, and the connection part of the water pipe and the valve is connected by a flange; the other section of the valve is connected to the water pipe, which is passed into the external water source (preferably a reservoir); the water pipe, valve, etc. are fixed to the lower chord ground beam of the ground beam system 1 through a U-shaped hoop.

[0024] The present invention also includes: The lifting lug 7 is fixed on the external frame 2. The lifting lug 7 is preferably composed of an ear plate, and the thickness, width, height and aperture of the ear plate are determined according to the overall weight of the model and the lifting span. The ear plate is fixed to the external frame 2 by welding. The overall rigidity of the device is ensured during lifting and the internal model is not damaged.

[0025] The above-mentioned test device for the whole reservoir model vibration table 8 of a high concrete dam provided by the present invention is first connected to the vibration table 8 through the ground beam system 1, and the ground beam system 1 is firmly fixed to the surface of the vibration table 8 through the bolt preload. The ground beam system 1 with sufficiently high rigidity and the external frame 2 stably transmit the force to the test model 9 in the internal box 4. Secondly, the support system composed of the external frame 2 and the internal inclined beam 3 supports the internal box 4, ensuring that the internal box 4 does not deform too much when the reservoir water and the test model 9 coexist. Thirdly, the test device and the reservoir water are placed in two areas of the internal box 4 respectively. The device can create an environment in which the dam body, reservoir water, river valley, bedrock and surrounding mountains are forced to vibrate together, which can better restore the real earthquake situation. Among them, the river valley is reflected by adjusting the arrangement of the internal inclined beams and the box steel plates on the surface of the inclined beams, the surrounding mountains are reflected by the above methods and the design of the test model itself, and the bedrock is also reflected by the test model itself. The bedrock and the concrete dam body can be placed in the box together.

[0026] In addition, the wave-absorbing device 5 in the box can effectively suppress the shock wave of the reservoir water in the internal box body 4 when it vibrates, thereby preventing the reservoir water from overflowing the box body.

[0027] The technical solution of the present invention is clearly described in detail below in conjunction with specific embodiments, as follows: A detachable device suitable for the whole reservoir model vibration table 8 test of a high concrete dam is composed of a ground beam system 1, an external frame 2, an internal inclined beam 3, an internal box 4, etc. The device is 9.8 meters long, 7.8 meters wide and 4.5 meters high. The ground beam system 1 is a low-carbon alloy steel frame structure, consisting of H-shaped steel beams, channel steel beams, box columns and H-shaped steel columns; the H-shaped steel beams are of WH400×300×14×20 model, the channel steel beams are of channel 600×300×15×20 model, the box columns are of box 300×10, box 300×200×10 and box 200×10 models, and the H-shaped steel columns are of HM244×175×7×11 model. The frame beam structure is composed of H-shaped steel beams and channel steel beams, and the vertical box columns and H-shaped steel columns in the middle of the upper and lower frame beam structures together constitute the ground beam system 1. The external frame 2 is a low-carbon alloy steel frame structure composed of H-shaped steel beams, box columns, and H-shaped steel columns; the H-shaped steel beams are of HM294×200×8×12 and HM244×175×7×11 models, the box columns are of box 300×10 and box 300×200×10 models, and the H-shaped steel columns are of HM294×200×8×12. The internal inclined beam 3 is composed of a low-carbon alloy steel beam, the lower part of which is fixed to the upper frame beam of the ground beam system 1, and the upper part is fixed to the external frame 2 column, wherein the internal inclined beam 3 is HM294×200×8×12. The internal box body 4 is composed of a low-carbon alloy steel plate, wherein the thickness of the low-carbon alloy steel plate is 10mm. The wave-breaking device is composed of a stainless steel frame and a perforated plastic plate, and 36 sets are modularly arranged, the top is flush with the top of the model box, and the bottom is flush with the internal box body 4, each stainless steel frame is 283mm wide, and a plastic perforated plate is inserted inside. The upper part of the drainage device 6 is connected to the internal box 4, and the lower part is connected to the lower frame beam of the ground beam system 1. There are two sets of drainage devices, which are composed of drainage pipes, flanges, flange butterfly valves and U-shaped hoops of DN100. The lifting lug 7 is composed of a lug plate and a connecting plate, and the lug plate is 25mm thick.

[0028] In this embodiment, the test model 9 weighs 70 t, the water depth is 2 m, and the maximum earthquake acceleration is 0.336 g.

[0029] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shaking table test device for a full reservoir model of a high concrete dam, characterized in that: include: a ground beam system, which is fixed to the shaking table; an external frame fixed to the ground beam system; An internal inclined beam, the lower part of which is fixedly connected to the ground beam system and the surrounding parts are fixedly connected to the external frame; The internal box is located inside the external frame, and its front and rear ends are respectively fixedly connected to the front and rear ends of the external frame, and its left and right ends are respectively fixedly connected to the internal inclined beam, and is used to hold reservoir water; A wave-breaking device, which is arranged at the end of the internal box body and is used to prevent the reservoir water from overflowing; A test model, which is fixed in the internal box; The external frame and the internal inclined beams together constitute a support system for the internal box.

2. A shaking table test device for a full reservoir model of a high concrete dam according to claim 1, characterized in that: Also includes: The water injection and drainage device has one end connected to the external water source and the other end connected to the internal box.

3. A shaking table test device for a full reservoir model of a high concrete dam according to claim 2, characterized in that: The drainage device is arranged at the lower side of the internal box body, and the two are connected by a flange.

4. A shaking table test device for a full reservoir model of a high concrete dam according to claim 1, characterized in that: The ground beam system is stably connected to the vibration table via bolts.

5. The shaking table test device for the whole reservoir model of a high concrete dam according to claim 1 is characterized in that: The lower part of the external frame is fixedly connected to the ground beam system by bolts or welding.

6. A shaking table test device for a full reservoir model of a high concrete dam according to claim 1, characterized in that: The lower part of the internal inclined beam is connected to the ground beam system by bolts or welding.

7. The shaking table test device for the whole reservoir model of a high concrete dam according to claim 1 is characterized in that: The internal box is connected to the external frame and the internal oblique beam by welding.

8. The shaking table test device for the whole reservoir model of a high concrete dam according to claim 1 is characterized in that: The bottom steel plate of the internal box body is ribbed to ensure the bearing capacity of the steel plate while ensuring a stable connection between the test model and the internal box body.

9. The shaking table test device for the whole reservoir model of a high concrete dam according to claim 1 is characterized in that: The wave-breaking device comprises: The supporting frame is connected to the end of the internal box body by bolts or welding, and a plastic perforated plate is inserted in the supporting frame.

10. A shaking table test device for a full reservoir model of a high concrete dam according to any one of claims 1 to 9, characterized in that: Also includes: A lifting lug is fixed on the outer frame.

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