A large steel structure aqueduct and an aqueduct design method

Abstract

The present invention relates to the field of water conservancy transportation, and specifically to a large-scale steel structure aqueduct and an aqueduct design method, which includes a horizontally arranged corrugated steel bottom plate and corrugated steel webs arranged on both sides of the corrugated steel bottom plate in the vertical direction. The two corrugated steel webs and the corrugated steel bottom plate enclose to form an aqueduct for water flow transportation; the corrugation direction of the corrugated steel bottom plate is perpendicular to the water flow transportation direction, and the corrugation direction of the corrugated steel web is the same as the water flow transportation direction. The present invention greatly improves the seismic resistance effect of the aqueduct and has a simple structure.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy transportation, and particularly to a large steel structure aqueduct and an aqueduct design method. Background Art

[0002] As a common water transportation structure, an aqueduct can effectively adjust the water resource differences between regions and create more favorable water resource conditions for the benefit of mankind. With the development of water conservancy projects, large steel structure aqueducts are increasingly widely used. The aqueduct has a large water load, and the load is concentrated on the upper structure. At the same time, the fluid-structure coupling effect of the aqueduct is complex, with mutual cancellation and superposition effects. Under the action of an extreme load such as an earthquake, which is a high-frequency and high-risk event, the aqueduct structure is easily damaged and destroyed, and then serious secondary disasters are triggered, resulting in losses of life and property. Especially in some earthquake-prone areas where the earthquake intensity is high and the frequency is high, it is more necessary to improve the seismic safety of large steel structure aqueducts.

[0003] Traditional seismic strategies for aqueduct structures focus on base isolation or active control; most of the base isolation structures are single and simple in structure. For example, rubber bearings, elastic slide bearings, etc. are used for seismic isolation and vibration reduction design, and the seismic effect and applicable scope are limited, and the energy dissipation mechanism is single; active control is to resist the earthquake action by improving the strength, ductility, integrity and other properties of the structure itself. The seismic effect is very good, but in actual engineering applications, the structure is complex, the cost is expensive, and the economic benefit is not obvious. Therefore, it is urgent to solve. Summary of the Invention

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a large steel structure aqueduct. The present invention greatly improves the seismic effect of the aqueduct and has a simple structure. The present invention also provides a design method for the aqueduct.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A large steel structure aqueduct includes a corrugated steel bottom plate arranged horizontally and corrugated steel webs arranged on both sides of the corrugated steel bottom plate in the vertical direction. The two corrugated steel webs and the corrugated steel bottom plate enclose an aqueduct to convey water flow; the corrugation direction of the corrugated steel bottom plate is perpendicular to the water flow conveying direction, and the corrugation direction of the corrugated steel web is the same as the water flow conveying direction.

[0007] As a further scheme of the present invention: the corrugated steel bottom plates of adjacent two sections of aqueducts are connected and fixed through a comb-shaped plate. The teeth of the comb-shaped plate are arranged along the water flow conveying direction, and the tooth openings of the comb-shaped plate are arranged facing; a corrugated telescopic energy dissipation plate is fixed on the surface of the comb-shaped plate. The corrugated telescopic energy dissipation plate includes a corrugated section and straight sections located at both ends of the corrugated section; the corrugation direction of the corrugated section of the corrugated telescopic energy dissipation plate is the same as the water flow conveying direction. The straight sections of the corrugated telescopic energy dissipation plate are connected and fixed with the comb-shaped plate, and the contact surfaces of the straight sections and the comb-shaped plate are hermetically arranged.

[0008] As a further solution of the present invention: the length of the corrugated straight segment of the corrugated steel web is a1, the length of the corrugated inclined segment of the corrugated steel web is c1, and the corrugation height of the corrugated steel web is h1; the wavelength of the corrugated steel web is l1;

[0009] The length of the corrugated straight segment of the corrugated steel bottom plate is a2, the length of the corrugated inclined segment of the corrugated steel bottom plate is c2, and the corrugation height of the corrugated steel bottom plate is h2; the wavelength of the corrugated steel bottom plate is l2; then:

[0010]

[0011]

[0012]

[0013] Among them, η1, η2, λ1, and λ2 are all constants.

[0014] As a further solution of the present invention: the length ranges of the corrugated straight segment length a1 of the corrugated steel web and the corrugated straight segment length a2 of the corrugated steel bottom plate are both 350 - 600 mm;

[0015] The value ranges of η1 and η2 are both 0.90 - 1.05;

[0016] The value ranges of λ1 and λ2 are both 0.5 - 0.574.

[0017] As a further solution of the present invention: taking the corrugation height of the corrugated telescopic energy dissipation plate as h3, the length of the corrugated segment of the corrugated telescopic energy dissipation plate as d1, and the length of the straight segment of the corrugated telescopic energy dissipation plate as e3; the length of the corrugated straight segment of the corrugated telescopic energy dissipation plate is a3, the length of the corrugated inclined segment of the corrugated telescopic energy dissipation plate is c3, and the wavelength of the corrugated telescopic energy dissipation plate is l3, then:

[0018] d1 = μL;

[0019]

[0020]

[0021]

[0022]

[0023] The total length d of the corrugated telescopic energy dissipation plate is:

[0024] d = d1 + 2e3;

[0025] Among them, μ, λ3, η3, and g3 are all constants;

[0026] L is the span of the aqueduct;

[0027] The value of n is rounded to an integer.

[0028] As a further solution of the present invention: the value range of μ is 4.10 to 7.25;

[0029] The value range of λ3 is 0.50 to 0.574;

[0030] The value range of η3 is 0.9 to 1.05;

[0031] The value range of g3 is 100 to 200.

[0032] As a further solution of the present invention: the equivalent stiffness of the corrugated steel web, corrugated steel bottom plate, and corrugated telescopic energy dissipation plate is:

[0033]

[0034]

[0035] where k is a constant;

[0036] D x1 is the equivalent stiffness of the corrugated steel web in the X direction;

[0037] D x2 is the equivalent stiffness of the corrugated steel bottom plate in the X direction;

[0038] D x3 is the equivalent stiffness of the corrugated telescopic energy dissipation plate in the X direction; D y1 is the equivalent stiffness of the corrugated steel web in the Y direction;

[0039] D y2 is the equivalent stiffness of the corrugated steel bottom plate in the Y direction;

[0040] D y3 is the equivalent stiffness of the corrugated telescopic energy dissipation plate in the Y direction; E1 is the elastic modulus of the corrugated steel web;

[0041] E2 is the elastic modulus of the corrugated steel bottom plate;

[0042] E3 is the elastic modulus of the corrugated telescopic energy dissipation plate;

[0043] t1 is the thickness of the corrugated steel web;

[0044] t2 is the thickness of the corrugated steel bottom plate;

[0045] t3 is the thickness of the corrugated telescopic energy dissipation plate;

[0046] The equivalent stiffness in the X direction refers to the equivalent stiffness along the corrugation direction;

[0047] The equivalent stiffness in the Y direction refers to the equivalent stiffness along the direction perpendicular to the corrugation direction.

[0048] As a further solution of the present invention: the value range of k is 9.8 to 10.0.

[0049] A design method for aqueducts, characterized by comprising the following steps:

[0050] S1. Build the described large steel structure aqueduct and determine the navigation structure parameters according to the navigation requirements;

[0051] S2. Determine the initial parameters of the corrugated steel web, corrugated steel bottom plate and corrugated expansion energy dissipation plate according to the navigation structure parameters;

[0052] S3. Establish a finite element model of the aqueduct according to the initial parameters determined in step S2, input the equivalent stiffness of the corrugated steel web, corrugated steel bottom plate and corrugated expansion energy dissipation plate into the finite element model, and calculate the dynamic response of the aqueduct;

[0053] S4. Input seismic waves into the finite element model of the aqueduct, adjust the initial parameters of the corrugated steel web, corrugated steel bottom plate and corrugated expansion energy dissipation plate in the aqueduct to adjust the equivalent stiffness, and obtain the aqueduct with the optimal seismic isolation and vibration reduction effect.

[0054] As a further solution of the present invention: in step S1, the navigation structure parameters include the span of the aqueduct, the height of the corrugated steel web, the thickness of the corrugated steel web, the width of the corrugated steel bottom plate, and the thickness of the corrugated steel bottom plate.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] 1. The aqueduct of the present invention adopts a deformable corrugated steel bottom plate in the transverse direction, and corrugated steel webs and corrugated expansion energy dissipation plates in the longitudinal direction, enabling the aqueduct to have good deformation and energy dissipation capabilities in both the transverse and longitudinal directions, forming a two-way deformation and energy dissipation collaborative working mechanism, greatly improving the seismic resistance effect of the aqueduct, and having a simple structure; the groove depth of each corrugated plate of the aqueduct is coupled with the water body flow for energy dissipation. During strong earthquakes, the water flow generates large horizontal and longitudinal forces on the aqueduct body, and its corrugated structure is coupled with the water body flow for energy dissipation, thereby maximizing the seismic resistance effect.

[0057] 2. In the present invention, adjacent two sections of aqueducts are connected by corrugated expansion energy-dissipating plates, forming a multiple seismic insurance mechanism, effectively overcoming the drawback of the single energy-dissipating and seismic reduction mechanism of the traditional aqueduct structure, reducing the energy consumption of the main structure under different earthquake intensities. The comb-shaped plate can deform synergistically with the corrugated expansion energy-dissipating plate, further improving the seismic isolation and reduction effect; the corrugated expansion energy-dissipating plate can also be used in superposition combination with the existing seismic isolation and reduction bearings to further achieve multiple seismic isolation and reduction controls; since both ends of the corrugated expansion energy-dissipating plate are detachably fixed to the aqueduct, it is convenient and fast to remove and replace the components that have exceeded the service life or are severely damaged, improving the maintenance and management efficiency of the aqueduct.

[0058] 3. The present invention reasonably sets various parameters of the corrugated steel web, corrugated steel bottom plate and corrugated expansion energy-dissipating plate. Through the reasonable design and adjustment of each parameter, the aqueduct structure with the optimal seismic isolation and reduction effect can be calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a schematic structural diagram of the present invention.

[0060] Figure 2 is a schematic structural diagram of the corrugated steel web and corrugated steel bottom plate in the present invention.

[0061] Figure 3 is a schematic structural diagram of the corrugated expansion energy-dissipating plate in the present invention.

[0062] Figure 4 is a schematic structural diagram of the connection part of two sections of aqueducts in the present invention.

[0063] Figure 5 is the finite element model of the present invention.

[0064] In the figure:

[0065] 1. Corrugated steel web; 2. Corrugated steel bottom plate; 3. Corrugated expansion energy-dissipating plate; 4. Comb-shaped plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0066] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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.

[0067] Please refer to Figures 1 to 4, in the embodiments of the present invention, a large steel structure aqueduct includes a corrugated steel bottom plate 2 at the bottom and corrugated steel webs 1 arranged vertically on both sides of the corrugated steel bottom plate 2. The corrugation direction of the corrugated steel bottom plate 2 is perpendicular to the water flow conveying direction, that is, the trough length of the corrugated steel bottom plate 2 is arranged along the water flow conveying direction; the corrugation direction of the corrugated steel web 1 is the same as the water flow conveying direction, that is, the troughs of the corrugated steel webs 1 are arranged vertically. Two groups of corrugated steel webs 1 and the corrugated steel bottom plate 2 enclose an aqueduct with an open top for water flow conveyance.

[0068] For convenience of processing, the aqueduct is a segmented structure. The corrugated steel bottom plates 2 of multiple segments of the aqueduct are connected and fixed by corrugated expansion energy dissipation plates 3. The corrugated steel webs 1, the corrugated steel bottom plates 2, and the corrugated expansion energy dissipation plates 3 are all corrugated plates. A comb plate 4 is arranged at the bottom of the corrugated expansion energy dissipation plate 3. The comb plate 4 or the corrugated expansion energy dissipation plate 3 is fixed to the corrugated steel bottom plate 2, and the fixing method is not limited. Welding fixation is preferably used.

[0069] The corrugated expansion energy dissipation plate 3 includes a corrugated section and straight sections extending from the corrugated section to both sides. The straight sections are clamped on the comb plate 4 by steel plates and fixed by bolts after clamping. The corrugation direction of the corrugated expansion energy dissipation plate 3 is the same as the water flow conveying direction, and the teeth of the comb plate 4 are arranged along the water flow conveying direction. A sealing strip is arranged between the contact surfaces of the straight section of the corrugated expansion energy dissipation plate 3 and the comb plate 4 to improve the sealing performance. The sealing strip is preferably a flexible waterproof material. The comb plate 4 is preferably made of steel to improve durability.

[0070] The specific parameters of the corrugated steel web 1, the corrugated steel bottom plate 2, and the corrugated expansion energy dissipation plate 3 are as follows.

[0071] The length of the corrugated straight section of the corrugated steel web 1 is a1, and the length range of a1 is 350 - 600 mm.

[0072] The length of the corrugated inclined section of the corrugated steel web 1 is c1.

[0073] The length of the corrugated straight section of the corrugated steel bottom plate 2 is a2, and the length range of a2 is 350 - 600 mm.

[0074] The length of the corrugated inclined section of the corrugated steel bottom plate 2 is c2.

[0075]

[0076] Among them, η1 and η2 are both constants;

[0077] The value range of η1 is 0.90 - 1.05; the value range of η2 is 0.90 - 1.05.

[0078] The wave height of the corrugated steel web 1 is h1, and the wavelength of the corrugated steel web 1 is l1;

[0079] The wave height of the corrugated steel bottom plate 2 is h2; the wavelength of the corrugated steel bottom plate 2 is l2;

[0080]

[0081] Among them, both λ1 and λ2 are constants;

[0082] The value range of λ1 is 0.5 to 0.574, and the value range of λ2 is 0.5 to 0.574.

[0083]

[0084] The wave height of the corrugated telescopic energy dissipation plate 3 is h3;

[0085] The corrugated section length of the corrugated telescopic energy dissipation plate 3 is d1;

[0086] The straight section length of the corrugated telescopic energy dissipation plate 3 is e3;

[0087] The corrugated straight section length of the corrugated telescopic energy dissipation plate 3 is a3; the corrugated inclined section length of the corrugated telescopic energy dissipation plate 3 is c3; the wavelength of the corrugated telescopic energy dissipation plate 3 is l3;

[0088] The total length of the corrugated telescopic energy dissipation plate 3 is d.

[0089] d1 = μL;

[0090]

[0091]

[0092]

[0093]

[0094] d = d1 + 2e3;

[0095] Among them, μ, λ3, η3 and g3 are all constants;

[0096] The value range of μ is 4.10 to 7.25;

[0097] The value range of λ3 is 0.50 to 0.574;

[0098] The value range of η3 is 0.9 to 1.05;

[0099] The value range of g3 is 100 to 200.

[0100] L is the span of the aqueduct;

[0101] The n value is rounded to an integer.

[0102] The equivalent stiffnesses of the corrugated steel web 1, corrugated steel bottom plate 2, and corrugated telescopic energy dissipation plate 3 are as follows:

[0103]

[0104]

[0105] Among them, k is a constant, and its value range is 9.8 to 10.0;

[0106] D x1 is the equivalent stiffness of the corrugated steel web 1 in the X direction;

[0107] D x2 is the equivalent stiffness of the corrugated steel bottom plate 2 in the X direction;

[0108] D x3 is the equivalent stiffness of the corrugated telescopic energy dissipation plate 3 in the X direction;

[0109] D y1 is the equivalent stiffness of the corrugated steel web 1 in the Y direction;

[0110] D y2 is the equivalent stiffness of the corrugated steel bottom plate 2 in the Y direction;

[0111] D y3 is the equivalent stiffness of the corrugated telescopic energy dissipation plate 3 in the Y direction;

[0112] E1 is the elastic modulus of the corrugated steel web 1;

[0113] E2 is the elastic modulus of the corrugated steel bottom plate 2;

[0114] E3 is the elastic modulus of the corrugated telescopic energy dissipation plate 3;

[0115] t1 is the thickness of the corrugated steel web 1;

[0116] t2 is the thickness of the corrugated steel bottom plate 2;

[0117] t3 is the thickness of the corrugated telescopic energy dissipation plate 3;

[0118] The equivalent stiffness in the X direction refers to the equivalent stiffness along the corrugated direction;

[0119] The equivalent stiffness in the Y direction refers to the equivalent stiffness along the direction perpendicular to the corrugation.

[0120] When designing the aqueduct, it is achieved through the following steps:

[0121] S1. Build a large steel structure aqueduct and confirm the navigation structure parameters according to the navigation requirements; the navigation structure parameters include the span of the aqueduct, the height of the corrugated steel web 1, the thickness of the corrugated steel web 1, the width of the corrugated steel bottom plate 2, and the thickness of the corrugated steel bottom plate 2.

[0122] S2. Determine the initial parameters of the corrugated steel web 1, corrugated steel bottom plate 2, and corrugated telescopic energy dissipating plate 3 according to the navigation structure parameters.

[0123] S3. Establish a finite element model of the aqueduct based on the initial parameters determined in step S2, input the equivalent stiffness of the corrugated steel web 1, corrugated steel bottom plate 2, and corrugated telescopic energy dissipating plate 3 into the finite element model, and calculate the dynamic response of the aqueduct.

[0124] S4. Input seismic waves into the finite element model of the aqueduct, adjust the initial parameters of the corrugated steel web 1, corrugated steel bottom plate 2, and corrugated telescopic energy dissipating plate 3 in the aqueduct to adjust the equivalent stiffness, and obtain the aqueduct with the optimal seismic isolation and vibration reduction effect.

[0125] The optimal values of the parameters of the aqueduct of the present invention are shown in the following table:

[0126] Table 1

[0127]

[0128]

[0129] The optimal values of the parameters of the aqueduct of the present invention at the best equivalent stiffness are shown in the following table:

[0130] Table 2

[0131] Parameter Preferred value Parameter Preferred value Parameter Preferred value <![CDATA[t1]]> 24 mm <![CDATA[t3]]> 16 mm <![CDATA[D x3 > <![CDATA[6.144×10 10 N·mm]]> <![CDATA[t2]]> 24 mm <![CDATA[E3]]> <![CDATA[2.0×10 4 Mpa]]> <![CDATA[D y1 > <![CDATA[8.146×10 10 N·mm]]> <![CDATA[E1]]> <![CDATA[2.06×10 5 Mpa]]> <![CDATA[D x1 > <![CDATA[2.136×10 12 N·mm]]> <![CDATA[D y2 > <![CDATA[8.146×10 10 N·mm]]> <![CDATA[E2]]> <![CDATA[2.06×10 5 Mpa]]> <![CDATA[D x2 > <![CDATA[2.136×10 12 N·mm]]> <![CDATA[D y3 > <![CDATA[3.646×10 7 N·mm]]>

[0132] In step S4, the input seismic wave adopts the artificial seismic wave generated by the response spectrum. Through trial calculation, combined with Figure 5 the finite element model of the large steel structure aqueduct shown, the structural forms and equivalent stiffnesses of the corrugated steel web 1, corrugated steel bottom plate 2, and corrugated telescopic energy dissipating plate 3 in the aqueduct are adjusted, so as to obtain the aqueduct structure with the optimal seismic isolation and vibration reduction effect.

[0133] As shown in the following table, the structural strength check calculation results of the aqueduct of the present invention under the action of E1 earthquake.

[0134] Table 3

[0135]

[0136]

[0137] As shown in the following table, the structural strength check calculation results of the aqueduct of the present invention under the action of E2 earthquake.

[0138] Table 4

[0139]

[0140] It can be seen that whether under the E1 earthquake or the E2 earthquake, the aqueduct of the present invention has good safety and stability, and its capacity demand ratio reaches above 2.57 under the E1 earthquake and above 2.36 under the E2 earthquake.

[0141] The seismic effect and material consumption of the aqueduct structure of the present invention are compared with the existing seismic isolation and vibration reduction design methods, and the results are shown in the following table.

[0142] Table 5

[0143]

[0144] It can be seen that for the aqueduct structure of the present invention, when the material consumption is similar to that of the base-isolated aqueduct, its capacity demand ratio under earthquake action is greatly improved compared with the base-isolated aqueduct. When the capacity demand ratio is the same as that of the actively controlled aqueduct, its material consumption is greatly reduced, and the economy is prominent.

[0145] The basic principles of the present application are described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to implement.

[0146] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the word "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to" and can be used interchangeably with it.

Claims

1. A large steel structure aqueduct, characterized in that, It includes a horizontally arranged corrugated steel bottom plate (2) and corrugated steel web plates (1) arranged on both sides of the corrugated steel bottom plate (2) in the vertical direction. The two corrugated steel web plates (1) and the corrugated steel bottom plate (2) enclose a flume to convey water flow; the corrugation direction of the corrugated steel bottom plate (2) is perpendicular to the water flow conveyance direction, and the corrugation direction of the corrugated steel web plate (1) is the same as the water flow conveyance direction; The corrugated steel bottom plates (2) between adjacent two sections of flumes are connected and fixed by a comb-shaped plate (4). The teeth of the comb-shaped plate (4) are arranged along the water flow conveyance direction, and the tooth openings of the comb-shaped plate (4) are arranged towards the corrugated expansion energy dissipation plate (3); a corrugated expansion energy dissipation plate (3) is fixed on the surface of the comb-shaped plate (4). The corrugated expansion energy dissipation plate (3) includes a corrugated section and straight sections located at both ends of the corrugated section; the corrugation direction of the corrugated section of the corrugated expansion energy dissipation plate (3) is the same as the water flow conveyance direction. The straight sections of the corrugated expansion energy dissipation plate (3) are connected and fixed with the comb-shaped plate (4), and the contact surfaces of the straight sections and the comb-shaped plate (4) are arranged in a sealed manner; The length of the corrugated straight section of the corrugated steel web plate (1) is a1, the length of the corrugated inclined section of the corrugated steel web plate (1) is c1, and the wave height of the corrugated steel web plate (1) is h1; the wavelength of the corrugated steel web plate (1) is l1; The length of the corrugated straight section of the corrugated steel bottom plate (2) is a2, the length of the corrugated inclined section of the corrugated steel bottom plate (2) is c2, and the wave height of the corrugated steel bottom plate (2) is h2; the wavelength of the corrugated steel bottom plate (2) is l2; then: wherein, η1, η2, λ1, and λ2 are all constants; The length ranges of the corrugated straight section length a1 of the corrugated steel web plate (1) and the corrugated straight section length a2 of the corrugated steel bottom plate (2) are both 350 - 600 mm; The value ranges of η1 and η2 are both 0.90 - 1.05; The value ranges of λ1 and λ2 are both 0.5 - 0.

574.

2. A large steel structure aqueduct according to claim 1, characterized in that, Taking the wave height of the corrugated expansion energy dissipation plate (3) as h3, the corrugated section length of the corrugated expansion energy dissipation plate (3) as d1, and the straight section length of the corrugated expansion energy dissipation plate (3) as e3; the corrugated straight section length of the corrugated expansion energy dissipation plate (3) is a3, the corrugated inclined section length of the corrugated expansion energy dissipation plate (3) is c3, and the wavelength of the corrugated expansion energy dissipation plate (3) is l3, then: d1 = μL; The total length d of the corrugated expansion energy dissipation plate (3) is: d = d1 + 2e3; wherein, μ, λ3, η3, and g3 are all constants; L is the span of the flume; Round the n value to an integer; The value range of μ is 4.10 - 7.25; The value range of λ3 is 0.50 - 0.574; The value range of η3 is 0.9 - 1.05; The value range of g3 is 100 - 200.

3. The large steel structure aqueduct according to claim 2, characterized in that, The equivalent stiffness of the corrugated steel web plate (1), the corrugated steel bottom plate (2), and the corrugated expansion energy dissipation plate (3) is: wherein, k is a constant; D x1 is the equivalent stiffness in the X direction of the corrugated steel web (1); D x2 is the equivalent stiffness of the corrugated steel bottom plate (2) in the X direction; D x3 is the equivalent stiffness in the X direction of the waveform expansion and energy dissipation plate (3); D y1 is the equivalent stiffness of the corrugated steel web (1) in the Y direction; D y2 is the equivalent stiffness in the Y direction of the corrugated steel bottom plate (2); D y3 is the equivalent stiffness in the Y direction of the waveform expansion and energy dissipation plate (3); E1 is the elastic modulus of the corrugated steel web plate (1); E2 is the elastic modulus of the corrugated steel bottom plate (2); E3 is the elastic modulus of the corrugated expansion energy dissipation plate (3); t1 is the thickness of the corrugated steel web plate (1); t2 is the thickness of the corrugated steel bottom plate (2); t3 is the thickness of the corrugated expansion energy dissipation plate (3); The X-direction equivalent stiffness refers to the equivalent stiffness in the corrugation direction; The equivalent stiffness in the Y direction refers to the equivalent stiffness along the direction perpendicular to the corrugation; The value range of k is 9.8 to 10.

0.

4. A flume design method, characterized in that, It includes the following steps: S1. Build a large steel structure aqueduct as described in any one of claims 1 to 3, and determine the navigation structure parameters according to the navigation requirements; S2. Determine the initial parameters of the corrugated steel web (1), corrugated steel bottom plate (2), and corrugated expansion energy dissipation plate (3) according to the navigation structure parameters; S3. Establish a finite element model of the aqueduct according to the initial parameters determined in step S2, input the equivalent stiffness of the corrugated steel web (1), corrugated steel bottom plate (2), and corrugated expansion energy dissipation plate (3) into the finite element model, and calculate the dynamic response of the aqueduct; S4. Input seismic waves into the finite element model of the aqueduct, adjust the initial parameters determined in the aqueduct for the corrugated steel web (1), corrugated steel bottom plate (2), and corrugated expansion energy dissipation plate (3) to adjust the equivalent stiffness, and obtain the aqueduct with the optimal seismic isolation and vibration reduction effect.

5. The design method of an aqueduct according to claim 4, characterized in that In step S1, the navigation structure parameters include the span of the aqueduct, the height of the corrugated steel web (1), the thickness of the corrugated steel web (1), the width of the corrugated steel bottom plate (2), and the thickness of the corrugated steel bottom plate (2).

Images