Bridge base with adjustable friction force, design method of bridge base and bridge structure

Abstract

The invention discloses a friction-adjustable bridge base, a design method thereof and a bridge structure.The friction-adjustable bridge base comprises a bridge base part and an embedded part, the friction coefficient of the embedded part is larger than that of the bridge base part, the embedded part is fixed to the bridge base part, the upper surface of the embedded part is flush with the upper surface of the bridge base part, and the lower surface of the embedded part is flush with the upper surface of the bridge base part. The embedded part does not completely cover the bridge base part and only covers the edge of the bridge base part. According to the method, the friction coefficient of the embedded part and the bridge base part is determined firstly, and then the friction force of the bridge base is adjusted by adjusting and controlling the contact area proportions of the structural parts making contact with the bridge base part on the bridge base part and the embedded part, so that the problem that the friction coefficient of a traditional bridge base cannot be changed is solved; therefore, accidents such as beam falling and beam overturning can be effectively avoided, the anti-seismic and damping capacity of the bridge base is greatly improved, the service life of the bridge base is greatly prolonged, the safety coefficient is high, the application range is wide, and the bridge base can be used for new bridge construction or old bridge transformation.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a bridge foundation with adjustable friction force, a design method thereof, and a bridge structure. Background Art

[0002] Bridges generally refer to structures built across rivers, lakes, and seas to facilitate the smooth passage of vehicles and pedestrians. In order to adapt to the modern high-speed development of the transportation industry, bridges are also extended to buildings that are built across mountain streams, poor geology, or to meet other transportation needs to make passage more convenient.

[0003] At present, the existing bridge structures mainly rely on the strength and deformation of the bridge itself to resist earthquakes and dampen shocks. There is still a lot of room for improvement in the anti-seismic and shock-absorbing effects. In addition, since the bridge base in the existing bridge structure is usually made of specific materials, the friction coefficient will not change, resulting in the anti-seismic and shock-absorbing control effect of the existing bridge remaining unchanged under different dynamic responses. When in the extreme position, accidents such as falling beams and beam overturning are prone to occur, posing a major safety hazard.

[0004] Based on this, the present invention discloses a bridge foundation with adjustable friction force, a design method thereof, and a bridge structure. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a bridge foundation with adjustable friction, a design method thereof and a bridge structure.

[0006] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0007] A bridge base with adjustable friction includes a matching bridge base and an embedded component, wherein the friction coefficient of the embedded component is greater than the friction coefficient of the bridge base, the embedded component is fixed on the bridge base and the upper surfaces of the embedded component and the bridge base are flush, and the embedded component can only cover the edge of the bridge base.

[0008] Furthermore, a groove structure adapted to the embedded component is opened along the edge of the upper surface of the bridge base component, and the embedded component is fixed in the groove to ensure that the upper surface of the embedded component and the bridge base component are flush.

[0009] Furthermore, several fixing grooves are evenly opened along the groove, and several fixing columns compatible with the fixing grooves are evenly arranged along the edge of the lower surface of the embedded component. By inserting the fixing columns into the compatible fixing grooves, the embedded component can be fixed in the groove and the upper surface of the embedded component and the bridge base component can be flush.

[0010] Furthermore, the shape of the bridge base member is circular, square or elliptical, the shape of the groove is circular, square or elliptical, and the shape of the embedded member is circular, square or elliptical.

[0011] The present invention also discloses a method for designing a bridge foundation with adjustable friction, comprising the following steps:

[0012] 1) Select bridge base components and embedded components with different friction coefficients to ensure that the friction coefficient of the embedded components is greater than the friction coefficient of the bridge base components;

[0013] 2) A groove structure matching with the embedded component is provided along the edge of the upper surface of the bridge base member, a plurality of fixing grooves are evenly provided along the groove, and a plurality of fixing columns matching with the fixing grooves are evenly provided along the edge of the lower surface of the embedded component. The embedded component can be fixed in the groove provided on the bridge base member by inserting the fixing columns into the matching fixing grooves, and the upper surfaces of the embedded component and the bridge base member are ensured to be flush, and the embedded component does not completely cover the bridge base member, but only covers the edge of the bridge base member;

[0014] 3) The friction force of the bridge foundation is adjusted by regulating the contact area ratio of the structural parts in contact with the bridge foundation on the bridge foundation and the embedded parts respectively.

[0015] Furthermore, the calculation formula of the friction force f of the bridge foundation is:

[0016] f=f1×m×A1+f2×m×A2

[0017] Where f1 is the friction coefficient of the embedded component, f2 is the friction coefficient of the bridge base component, m is the weight of the structural component, A1 is the ratio of the contact area of ​​the structural component in contact with the bridge base on the embedded component to the total contact area, A2 is the ratio of the contact area of ​​the structural component in contact with the bridge base on the bridge base to the total contact area, and A1+A2=1.

[0018] The invention also discloses a bridge structure, comprising the above-mentioned bridge base with adjustable friction.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention discloses a bridge foundation with adjustable friction, a design method thereof and a bridge structure. Firstly, the friction coefficients of the bridge foundation and the embedded parts are determined. Then, the friction of the bridge foundation is adjusted by regulating the contact area ratios of the structural parts in contact with the bridge foundation on the embedded parts and the bridge foundation respectively. This overcomes the problem that the friction coefficient of the traditional bridge foundation cannot be changed, and at the same time overcomes the problem that the seismic and shock-absorbing control effect of the traditional bridge foundation remains unchanged under different dynamic responses. This can effectively avoid accidents such as falling beams and beam overturning, greatly improve the seismic and shock-absorbing capacity and service life of the bridge foundation, has a high safety factor, a simple overall structure, a short production cycle, a low cost, a wide range of applications, and can be used for the construction of new bridges or the reconstruction of old bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of embodiment 1 of the present invention;

[0022] Figure 2 It is a structural schematic diagram of embodiment 2 of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the bridge structure of Example 3 of the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0026] In one aspect, the present invention discloses a bridge foundation with adjustable friction force, such as Figure 1-2 As shown, the bridge base member 1 and the embedded member 2 are matched, and the friction coefficients of the bridge base member 1 and the embedded member 2 are different, and the friction coefficient of the bridge base member 1 is smaller than that of the embedded member 2, that is, the friction coefficient of the embedded member 2 is larger than that of the bridge base member 1. In order to achieve a stable connection between the bridge base member 1 and the embedded member 2, the present invention designs the structure of the bridge base member 1 and the embedded member 2 to ensure that the embedded member 2 is fixed on the bridge base member 1 and the upper surfaces of the bridge base member 1 and the embedded member 2 are flush, and at the same time ensure that the embedded member 2 can only cover the edge position of the bridge base member 1.

[0027] In some embodiments, the present invention can achieve a stable connection between the bridge base member 1 and the embedded member 2 in the following manner:

[0028] The present invention has a groove structure matched with the embedded component 2 along the edge of the upper surface of the bridge base 1, a plurality of fixing grooves are evenly arranged along the groove, and a plurality of fixing columns matched with the fixing grooves are evenly arranged along the edge of the lower surface of the embedded component 2. The embedded component 2 can be fixed in the groove opened on the bridge base 1 by inserting the fixing columns into the matched fixing grooves, and the upper surfaces of the bridge base 1 and the embedded component 2 can be flush. The embedded component 2 does not completely cover the bridge base 1, and it is sufficient to ensure that the embedded component 2 covers the edge position of the bridge base 1.

[0029] In some embodiments, the present invention can also achieve a stable connection between the bridge base member 1 and the embedded member 2 in the following manner:

[0030] The present invention has a groove structure matched with the embedded component 2 along the edge of the upper surface of the bridge base 1, a plurality of fixing columns are evenly arranged along the groove, and a plurality of fixing grooves matched with the fixing columns are evenly opened along the edge of the lower surface of the embedded component 2. The embedded component 2 can be fixed in the groove opened on the bridge base 1 by inserting the fixing columns into the matched fixing grooves, and the upper surfaces of the bridge base 1 and the embedded component 2 can be flush. The embedded component 2 does not completely cover the bridge base 1, and it is sufficient to ensure that the embedded component 2 covers the edge position of the bridge base 1.

[0031] In addition to the above two methods, the present invention can also use other methods to achieve a stable connection between the bridge base member 1 and the embedded member 2. It only needs to ensure that the upper surfaces of the bridge base member 1 and the embedded member 2 are flush, and the embedded member 2 does not completely cover the bridge base member 1. The embedded member 2 only covers the edge position of the bridge base member 1. The connection method can be flexibly selected according to actual needs.

[0032] In some embodiments, the shape of the bridge base member 1 is circular, square, oval, etc., which can be flexibly selected according to actual needs.

[0033] In some embodiments, the shape of the inner component 2 is circular, square, oval, etc., which can be flexibly selected according to actual needs. It is necessary to ensure that the shapes and sizes of the bridge base member 1 and the inner component 2 are compatible.

[0034] In some embodiments, the shape of the groove is circular, square, oval, etc., which can be flexibly selected according to actual needs.

[0035] On the other hand, the present invention also discloses a method for designing a bridge foundation with adjustable friction, comprising the following steps:

[0036] 1) Selecting a bridge base member 1 and an embedded member 2 with different friction coefficients, and ensuring that the friction coefficient of the embedded member 2 is greater than the friction coefficient of the bridge base member 1;

[0037] 2) A groove structure adapted to the embedded component is provided along the edge of the upper surface of the bridge base member 1, a plurality of fixed grooves are evenly provided along the groove, and a plurality of fixed columns adapted to the fixed grooves are evenly provided along the edge of the lower surface of the embedded component 2. The embedded component 2 can be fixed in the groove provided on the bridge base member 1 by inserting the fixed columns into the adapted fixed grooves, and the upper surfaces of the bridge base member 1 and the embedded component 2 are ensured to be flush, and the embedded component 2 does not completely cover the bridge base member 1, but only covers the edge of the bridge base member 1;

[0038] 3) The friction force of the bridge foundation is adjusted by adjusting the contact area ratio of the structural parts in contact with the bridge foundation on the bridge foundation 1 and the embedded part 2. The calculation formula of the friction force f of the bridge foundation is:

[0039] f=f1×m×A1+f2×m×A2

[0040] In the formula, f1 is the friction coefficient of the embedded component 2, f2 is the friction coefficient of the bridge base component 1, m is the weight of the structural component, A1 is the ratio of the contact area of ​​the structural component in contact with the bridge foundation on the embedded component 2 to the total contact area, A2 is the ratio of the contact area of ​​the structural component in contact with the bridge foundation on the bridge base component 1 to the total contact area, and A1+A2=1.

[0041] When the structural member in contact with the upper surface of the bridge foundation is vibrated and displaced, the lower surface of the structural member will more or less contact the upper surface of the bridge base member 1 and / or the embedded member 2. According to the above calculation formula, the friction force f of the bridge foundation is related to the friction coefficient of the bridge base member 1 and the embedded member 2, the contact area ratio of the structural member on the bridge base member 1 and the embedded member 2, and the magnitude of the gravity effect of the structural member on the bridge base member 1 and the embedded member 2. The change of the friction coefficient of the bridge base member 1 and the embedded member 2 will cause the friction force f to change accordingly, and the change of the contact area ratio of the structural member on the bridge base member 1 and the embedded member 2 will cause the friction force f to change accordingly. The change of the gravity effect of the structural member on the bridge base member 1 and the embedded member 2 will cause the friction force f to change accordingly, so that different friction forces can be obtained under different states, so that the extreme position and the extreme friction force can be obtained, so that the safety of the bridge can be met within the extreme position and the extreme friction force range. Sliding friction can also reduce shock and consumption, which is beneficial to improve the seismic and shock absorbing effect of the bridge and avoid accidents such as falling beams and beam overturning.

[0042] Example 1

[0043] like Figure 1 As shown, a bridge base with adjustable friction includes a matching bridge base 1 and an embedded component 2, the friction coefficients of the bridge base 1 and the embedded component 2 are different, the friction coefficient of the bridge base 1 is smaller than that of the embedded component 2, the shapes of the bridge base 1 and the embedded component 2 are both elliptical, in order to achieve a stable connection between the embedded component 2 and the bridge base 1, the present invention provides an elliptical groove matching the embedded component 2 along the edge of the upper surface of the bridge base 1, and a number of circular fixing grooves are evenly provided along the groove, and a number of fixing columns matching the fixing grooves are evenly arranged along the edge of the lower surface of the embedded component 2, and the embedded component 2 can be fixed in the groove opened on the bridge base 1 by inserting the fixing column into the matching fixing groove, and ensure that the upper surfaces of the embedded component 2 and the bridge base 1 are flush, and the embedded component 2 does not completely cover the bridge base 1, and it is only necessary to ensure that the embedded component 2 covers the edge position of the bridge base 1.

[0044] A method for designing a bridge foundation with adjustable friction force comprises the following steps:

[0045] 1) Select bridge base member 1 and embedded member 2 with different friction coefficients, and ensure that the friction coefficient of embedded member 2 is greater than the friction coefficient of bridge base member 1. In this embodiment, the friction coefficient of embedded member 2 is f1=0.1, and the friction coefficient of bridge base member 1 is f2=0.05. Bridge base member 1 and embedded member 2 can be directly purchased on the market;

[0046] 2) A groove matching the inner part is provided along the edge of the upper surface of the bridge base member 1, a plurality of fixing grooves are evenly provided along the groove, and a plurality of fixing columns matching the fixing grooves are evenly provided along the edge of the lower surface of the inner part 2. The inner part 2 can be fixed in the groove provided on the bridge base member 1 by inserting the fixing columns into the matching fixing grooves, and the upper surfaces of the bridge base member 1 and the inner part 2 are ensured to be flush, and the inner part 2 does not completely cover the bridge base member 1, but only covers the edge of the bridge base member 1;

[0047] 3) The friction force of the bridge foundation is adjusted by adjusting the contact area ratio of the structural parts in contact with the bridge foundation on the bridge foundation 1 and the embedded part 2. The calculation formula of the friction force f of the bridge foundation is:

[0048] f=0.1×m×A1+0.05×m×A2

[0049] Wherein, m is the weight of the structural member, A1 is the ratio of the contact area of ​​the structural member in contact with the bridge foundation on the embedded member 2 to the total contact area, A1=1 / 4, A2 is the ratio of the contact area of ​​the structural member in contact with the bridge foundation on the bridge foundation 1 to the total contact area, A2=3 / 4, A1+A2=1.

[0050] Example 2

[0051] like Figure 2 As shown, a bridge base with adjustable friction includes a matching bridge base 1 and an embedded component 2, the friction coefficients of the bridge base 1 and the embedded component 2 are different, the friction coefficient of the bridge base 1 is smaller than that of the embedded component 2, and the shapes of the bridge base 1 and the embedded component 2 are both square. In order to achieve a stable connection between the embedded component 2 and the bridge base 1, the present invention provides a square groove matching the embedded component 2 along the edge of the upper surface of the bridge base 1, and evenly provides a number of circular fixing grooves along the groove. Along the edge of the lower surface of the embedded component 2, a number of fixing columns matching the fixing grooves are evenly arranged. By inserting the fixing columns into the matching fixing grooves, the embedded component 2 can be fixed in the groove opened on the bridge base 1 and ensure that the upper and lower surfaces of the embedded component 2 and the bridge base 1 are flush. The embedded component 2 does not completely cover the bridge base 1, and it is only necessary to ensure that the embedded component 2 covers the edge position of the bridge base 1.

[0052] A method for designing a bridge foundation with adjustable friction force comprises the following steps:

[0053] 1) Select bridge base member 1 and embedded member 2 with different friction coefficients, and ensure that the friction coefficient of embedded member 2 is greater than the friction coefficient of bridge base member 1. In this embodiment, the friction coefficient of embedded member 2 is f1=0.1, and the friction coefficient of bridge base member 1 is f2=0.05. Bridge base member 1 and embedded member 2 can be directly purchased on the market;

[0054] 2) A groove matching the inner part is provided along the edge of the upper surface of the bridge base member 1, a plurality of fixing grooves are evenly provided along the groove, and a plurality of fixing columns matching the fixing grooves are evenly provided along the edge of the lower surface of the inner part 2. The inner part 2 can be fixed in the groove provided on the bridge base member 1 by inserting the fixing columns into the matching fixing grooves, and the upper surfaces of the bridge base member 1 and the inner part 2 are ensured to be flush, and the inner part 2 does not completely cover the bridge base member 1, but only covers the edge of the bridge base member 1;

[0055] 3) The friction force of the bridge foundation is adjusted by adjusting the contact area ratio of the structural parts in contact with the bridge foundation on the bridge foundation 1 and the embedded part 2. The calculation formula of the friction force f of the bridge foundation is:

[0056] f=0.1×m×A1+0.05×m×A2

[0057] Wherein, m is the weight of the structural member, A1 is the ratio of the contact area of ​​the structural member in contact with the bridge foundation on the embedded member 2 to the total contact area, A1=1 / 2, A2 is the ratio of the contact area of ​​the structural member in contact with the bridge foundation on the bridge foundation 1 to the total contact area, A2=1 / 2, A1+A2=1.

[0058] Example 3

[0059] The friction-adjustable bridge foundation disclosed in Example 2 is applied to Figure 3 In the bridge structure shown, specifically, the bridge structure includes a beam body 3 and a pier 4 arranged in sequence from top to bottom, a support upper steel plate 5 and a support lower steel plate 6 are arranged in sequence from top to bottom between the beam body 3 and the pier 4, and a friction-adjustable bridge base 7 as described above is arranged between the support upper steel plate 5 and the support lower steel plate 6 to replace the existing polytetrafluoroethylene plate structure that cannot adjust the friction.

[0060] The present invention can set the friction-adjustable bridge base at any suitable position of the bridge structure according to actual needs to achieve the purpose of adjustable friction. Example 3 is only one of the ways and does not constitute the scope of the patent. The present invention does not limit or elaborate on the specific setting position of the bridge base.

[0061] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0062] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bridge foundation with adjustable friction, characterized in that: It includes a matching bridge base member and an embedded member, wherein the friction coefficient of the embedded member is greater than the friction coefficient of the bridge base member, the embedded member is fixed on the bridge base member and the upper surfaces of the embedded member and the bridge base member are flush, and the embedded member can only cover the edge position of the bridge base member.

2. The friction-adjustable bridge foundation according to claim 1, characterized in that: A groove structure matched with the embedded component is opened along the edge of the upper surface of the bridge base component. The embedded component is fixed in the groove and ensures that the upper surface of the embedded component and the bridge base component are flush.

3. The friction-adjustable bridge foundation according to claim 2, characterized in that: Several fixing grooves are evenly opened along the groove, and several fixing columns matching the fixing grooves are evenly arranged along the edge of the lower surface of the embedded component. By inserting the fixing columns into the matching fixing grooves, the embedded component can be fixed in the groove and the upper surface of the embedded component and the bridge base component can be flush.

4. The friction-adjustable bridge foundation according to claim 2, characterized in that: The shape of the bridge base member is circular, square or oval, the shape of the groove is circular, square or oval, and the shape of the embedded member is circular, square or oval.

5. The method for designing a bridge foundation with adjustable friction force according to any one of claims 1 to 4, characterized in that: The following steps are involved: 1) Select bridge base components and embedded components with different friction coefficients to ensure that the friction coefficient of the embedded components is greater than the friction coefficient of the bridge base components; 2) A groove structure matching with the embedded component is provided along the edge of the upper surface of the bridge base member, a plurality of fixing grooves are evenly provided along the groove, and a plurality of fixing columns matching with the fixing grooves are evenly provided along the edge of the lower surface of the embedded component. The embedded component can be fixed in the groove provided on the bridge base member by inserting the fixing columns into the matching fixing grooves, and the upper surfaces of the embedded component and the bridge base member are ensured to be flush, and the embedded component does not completely cover the bridge base member, but only covers the edge of the bridge base member; 3) The friction force of the bridge foundation is adjusted by regulating the contact area ratio of the structural parts in contact with the bridge foundation on the bridge foundation and the embedded parts respectively.

6. The method for designing a bridge foundation with adjustable friction force according to claim 5, characterized in that: The calculation formula of the friction force f of the bridge foundation is: f=f1×m×A1+f2×m×A2 Where f1 is the friction coefficient of the embedded component, f2 is the friction coefficient of the bridge base component, m is the weight of the structural component, A1 is the ratio of the contact area of ​​the structural component in contact with the bridge base on the embedded component to the total contact area, A2 is the ratio of the contact area of ​​the structural component in contact with the bridge base on the bridge base to the total contact area, and A1+A2=1.

7. A bridge structure, characterized in that: A bridge foundation with adjustable friction force comprising any one of claims 1-4.

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