Fabricated self-resetting double-order energy dissipation support

Abstract

The assembly type self-resetting double-step energy dissipation support mainly comprises a first energy dissipation steel plate set and a second energy dissipation steel plate set which are located between an inner restraining pipe and an outer restraining pipe, and a long round hole is formed in one end of the second energy dissipation steel plate set so that a staged energy dissipation mechanism can be achieved. A group of prestressed tendons are anchored on the end plates at the two ends of the inner constraint pipe and the outer constraint pipe and can provide resetting capacity for supporting. The double-stage energy-dissipation structure has the double-stage energy-dissipation characteristic, the structure can adapt to the earthquake action of different strength grades, the weak layer effect of the structure under strong earthquakes can be effectively reduced, and the anti-collapse capacity is improved. The device has good reset capacity, the structure can have low residual displacement response after an earthquake, and the recovery speed of the normal use function of the structure is greatly increased.

Description

Technical Field

[0001] The invention relates to the field of energy dissipation and shock absorption in civil engineering, and in particular to an assembled self-resetting double-stage energy dissipation support. Background Art

[0002] Although adding ordinary steel braces or buckling-restrained braces to traditional moment-resistant frame structures can improve the seismic resistance of the structure to a certain extent, the structure often produces large residual deformations under the action of strong earthquakes, which affects the post-earthquake use function of the structure and is costly to repair.

[0003] In recent years, self-resetting energy-absorbing supports have gradually attracted the attention of academia and engineering circles as a new type of energy dissipation and shock absorption technology. By combining the reset device with the energy dissipation device, the self-resetting energy-absorbing support can achieve the goal of low or even zero residual displacement response of the structure under earthquake action. The self-resetting energy-absorbing support can be processed and assembled in the factory and is easy to install at the construction site, which has a wide range of application prospects.

[0004] However, most existing self-resetting energy-absorbing support technologies rely on a single energy-absorbing mechanism or reset mechanism, which makes it difficult to simultaneously meet the seismic requirements of structures under different earthquake intensities. Especially under extreme earthquakes, a single energy-absorbing element or reset element may fail due to excessive deformation, resulting in a decrease in the overall performance of the support, which in turn causes the structure to collapse due to weak layers. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide an assembled self-resetting double-stage energy-absorbing support with good reset ability, which can make the structure have a low residual displacement response after an earthquake and greatly improve the recovery speed of the normal use function of the structure.

[0006] In order to solve the above technical problems, the present invention provides an assembled self-resetting double-stage energy-absorbing support, comprising: a first energy-absorbing steel plate group (1) and a second energy-absorbing steel plate group (2) located between an inner constraint tube (3) and an outer constraint tube (4); the planes where the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2) are located are perpendicular to each other; two lateral constraint plates (5) and two pads (6) are welded on each surface of the inner constraint tube (3);

[0007] The two end plates (8) pass through the two ends of the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2), respectively, and are in a fitting state with the end surfaces of the inner restraining tube (3) and the outer restraining tube (4);

[0008] Four prestressed tendons (7) pass through the circular holes of the two end plates (8) and are fixed to the end plates (8) by means of anchor nuts (9); the first energy-absorbing steel plate group (1), the second energy-absorbing steel plate group (2) and the left connecting piece (10) are connected to the inner restraining tube connecting section (3a) by means of first bolts (12); the first energy-absorbing steel plate group (1), the second energy-absorbing steel plate group (2) and the right connecting piece (11) are connected to the outer restraining tube connecting section (4a) by means of second bolts (12).

[0009] In a preferred embodiment: the first energy-absorbing steel plate group (1) is composed of four energy-absorbing steel plates of the same size, each energy-absorbing steel plate includes a yield section (1a) with the smallest cross-section in the middle, connecting sections (1b) with the largest cross-sections at both ends, and an arc transition section (1c); the connecting section (1b) is provided with evenly distributed circular holes.

[0010] In a preferred embodiment: the second energy-absorbing steel plate group (2) is composed of four energy-absorbing steel plates of the same size, each energy-absorbing steel plate includes a yield section (2a) with the smallest cross-section in the middle, connecting sections (2b) with the largest cross-sections at both ends, and an arc transition section (2c). The left end connecting section (2b) is provided with evenly distributed oblong holes, and the right end connecting section (2b) is provided with evenly distributed circular holes.

[0011] In a preferred embodiment: the inner restraint tube (3) is a square or rectangular cross-section steel tube formed by welding four steel plates, and a middle area of ​​a certain length is cut off at the left end of each steel plate of the inner restraint tube (3) to form a connecting section (3a); the connecting section (3a) is provided with evenly distributed circular holes.

[0012] In a preferred embodiment: the outer restraining tube (4) is a square or rectangular cross-section steel tube formed by welding four steel plates, and a middle area of ​​a certain length is cut off at the right end of each steel plate of the outer restraining tube (4) to form a connecting section (4a), and the connecting section (4a) is provided with evenly distributed circular holes.

[0013] In a preferred embodiment: a portion of the triangular area is cut off at one end of the lateral restraint plate (5), and a certain gap exists between the lateral restraint plate (5) and the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2).

[0014] In a preferred embodiment: the thickness of the lateral restraining plate (5) is the same as the thickness of the first energy-absorbing steel plate group (1) or the second energy-absorbing steel plate group (2) in the same plane, and is smaller than the gap between the inner restraining tube (3) and the outer restraining tube (4);

[0015] The thickness of the pad (6) is greater than the thickness of the lateral restraining plate (5) and smaller than the gap between the inner restraining tube (3) and the outer restraining tube (4).

[0016] In a preferred embodiment: the number of the prestressed tendons (7) is four groups, each group containing a single tendon or multiple tendons; the prestressed tendons (7) are made of fiber composite material tendons with high elastic deformation ability or shape memory alloy cables.

[0017] In a preferred embodiment: the end plate (8) has four L-shaped slots symmetrically formed at the four corners, and four circular holes symmetrically formed near the L-shaped slots.

[0018] In a preferred embodiment: the left connecting piece (10) and the right connecting piece (11) are both welded by four angle steels and a steel plate, and circular holes are opened on the angle steels and the steel plate;

[0019] The left connecting piece (10) is longer than the right connecting piece (11).

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides an assembled self-resetting double-stage energy-absorbing support. Under the action of an earthquake, plastic damage only occurs in a first energy-absorbing steel plate group and a second energy-absorbing steel plate group connected by bolts, and the remaining components remain elastic, which can greatly reduce the cost of repairing the structure after an earthquake.

[0022] The present invention provides an assembled self-resetting double-stage energy-absorbing support, which provides a reset capability through prestressed tendons, and can make the structure have a very low residual displacement response after an earthquake, thereby greatly improving the recovery speed of the normal use function of the structure after an earthquake.

[0023] The present invention provides an assembled self-resetting double-stage energy dissipation support, which has unique double-stage energy dissipation characteristics, can adapt to earthquake effects of different intensity levels, and can flexibly adjust the deformation mode of the structure to reduce the possibility of collapse of the structure due to excessive inter-layer displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the present invention;

[0025] Figure 2 It is a disassembly schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of the first energy dissipation steel plate group of the present invention;

[0027] Figure 4 It is a schematic diagram of the second energy-absorbing steel plate group of the present invention;

[0028] Figure 5 It is a schematic diagram of welding and assembling the inner restraint tube, the lateral restraint plate and the backing plate;

[0029] Figure 6 is a schematic diagram of an end plate of the present invention;

[0030] Among them, the first energy absorbing steel plate group 1, the first energy absorbing steel plate group yield section 1a, the first energy absorbing steel plate group connecting section 1b, the first energy absorbing steel plate group transition section 1c, the second energy absorbing steel plate group 2, the second energy absorbing steel plate group yield section 2a, the second energy absorbing steel plate group connecting section 2b, the second energy absorbing steel plate group transition section 2c, the inner constraint tube 3, the inner constraint tube connecting section 3a, the outer constraint tube 4, the outer constraint tube connecting section 4a, the lateral constraint plate 5, the pad 6, the prestressed tendon 7, the end plate 8, the anchor nut 9, the left connecting piece 10, the right connecting piece 11, and the bolt 12. DETAILED DESCRIPTION

[0031] In order to make the technical solutions and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0032] In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower" and the like indicate directions or positional relationships based on the attached Figure 1 and attached Figure 2 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] like Figure 1-Figure 6 As shown, the present embodiment provides an assembled self-resetting two-stage energy-absorbing support, which is mainly composed of a first energy-absorbing steel plate group 1, a second energy-absorbing steel plate group 2, an inner constraint tube 3, an outer constraint tube 4, a lateral constraint plate 5, a pad 6, a prestressed tendon 7, an end plate 8, an anchor nut 9, a left connecting piece 10 and a right connecting piece 11 and other components.

[0034] The first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2 are both composed of four energy-absorbing steel plates of the same size, and the energy-absorbing steel plates are made of Q235 steel or low-yield point steel by wire cutting technology.

[0035] Each energy-absorbing steel plate of the first energy-absorbing steel plate group 1 includes a yielding section 1a with the smallest cross-section in the middle, a connecting section 1b with the largest cross-section at both ends, and an arc transition section 1c. The connecting section 1b is provided with evenly distributed circular holes. Each energy-absorbing steel plate of the second energy-absorbing steel plate group includes a yielding section 2a with the smallest cross-section in the middle, a connecting section 2b with the largest cross-section at both ends, and an arc transition section 2c. The left end connecting section 2b is provided with evenly distributed oblong holes, the length of which is determined according to design requirements; the right end connecting section 2b is provided with evenly distributed oblong holes.

[0036] The inner constraint tube 3 and the outer constraint tube 4 are square or rectangular cross-section steel tubes welded from four steel plates, and are made of Q355 steel. The left end of each steel plate of the inner constraint tube 3 has a middle area of ​​a certain length cut off to form a connecting section 3a, and the connecting section 3a has evenly distributed circular holes. The right end of each steel plate of the outer constraint tube 4 has a middle area of ​​a certain length cut off to form a connecting section 4a, and the connecting section has evenly distributed circular holes.

[0037] Two lateral restraint plates 5 and pads 6 symmetrical about the central axis of the inner restraint tube are welded on each surface of the inner restraint tube 3. A part of the triangular area is cut off at the left end of the lateral restraint plate 5, and there is a gap of 1 to 2 mm between the lateral restraint plate 5 and the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2. The thickness of the lateral restraint plate 5 is the same as the thickness of the first energy-absorbing steel plate group 1 or the second energy-absorbing steel plate group 2 in the same plane, and is 3 to 4 mm smaller than the gap between the inner restraint tube 3 and the outer restraint tube 4. The thickness of the pad 6 is about 2 to 3 mm thicker than the thickness of the lateral restraint plate 5, and about 1 mm smaller than the gap between the inner restraint tube 3 and the outer restraint tube 4.

[0038] The first energy absorbing steel plate group 1 and the second energy absorbing steel plate group 2 are symmetrically arranged in the gap between the inner restraining tube 3 and the outer restraining tube 4 , and the planes of the first energy absorbing steel plate group 1 and the second energy absorbing steel plate group 2 are perpendicular to each other.

[0039] There are four groups of prestressed tendons 7, each group includes a single tendon or multiple tendons, and the prestressed tendons 7 have a certain pretension. The pretension value and the number of prestressed tendons in each group are determined according to design requirements. The prestressed tendons 7 need to use fiber composite tendons with high elastic deformation ability or shape memory alloy cables.

[0040] The end plate 8 has four L-shaped slots symmetrically formed at the four corners, and four circular holes symmetrically formed near the slots.

[0041] The left connecting piece 10 and the right connecting piece 11 are both welded by four angle steels and a steel plate, and the angle steels and the steel plate are both provided with round holes. The left connecting piece 10 is longer than the right connecting piece 11.

[0042] The lateral restraining plate 5, the pad 6, the end plate 8, the left connecting piece 10 and the right connecting piece 11 are all made of Q355 steel.

[0043] The two end plates 8 pass through the two ends of the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2, respectively, and are in a state of being fitted with the end faces of the inner constraint tube 3 and the outer constraint tube 4. Four prestressed tendons 7 pass through the circular holes of the two end plates 8 and are fixed to the end plates 8 at both ends with anchor nuts 9. In order to reduce the prestress loss of the prestressed tendons 7, double nut anchoring can be used.

[0044] The first energy absorbing steel plate group 1, the second energy absorbing steel plate group 2 and the left connecting piece 10 are connected to the inner constraint tube connecting section 3a through high-strength bolts 12, and the first energy absorbing steel plate group 1, the second energy absorbing steel plate group 2 and the right connecting piece 11 are connected to the outer constraint tube connecting section 4a through high-strength bolts 12.

[0045] The assembly process of the above-mentioned assembled self-resetting double-stage energy dissipation support is as follows:

[0046] Step 1: Weld the lateral restraining plate 5 and the backing plate 6 to each surface of the inner restraining tube 3 .

[0047] Step 2: Place the inner restraint tube 3 upright with the left end facing downward, and then manually fix the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2 at corresponding positions on the surface of the inner tube 3. Then, the left end of the outer restraint tube 4 passes downward through the inner restraint tube 3, the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2. When the circular hole of the connecting section 4a of the outer restraint tube 4 is aligned with the circular hole at the right end of the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2, temporarily insert multiple high-strength bolts 12 to fix the position of the outer restraint tube 4.

[0048] Step 3: Place the above assembly horizontally, and pass the two end plates 8 through both ends of the first energy-absorbing steel plate group 1 and the second energy-absorbing steel plate group 2 until they are in contact with the end surfaces of the inner restraining tube 3 and the outer restraining tube 4 .

[0049] Step 4: Pass the four prestressed tendons 7 through the circular holes of the two end plates 8, fix the left end with the anchor nut 9, and use a through-type jack on the right end to tension each prestressed tendon 7 according to the "grading, diagonal" tensioning principle. After tensioning, use the anchor nut 9 to anchor each prestressed tendon 7 to the end plate 8 at the right end.

[0050] Step 5: Connect the first energy-absorbing steel plate group 1, the second energy-absorbing steel plate group 2 and the left connecting piece 10 to the connecting section 3a of the inner restraint tube 3 through high-strength bolts 12, and use an electric torque wrench to apply the specified pre-tension to the high-strength bolts 12; the high-strength bolts at the oblong holes only need to be tightened manually without applying pre-tension. Remove the temporary fixing bolts of the outer restraint tube 4, then connect the first energy-absorbing steel plate group 1, the second energy-absorbing steel plate group 2 and the right connecting piece 11 to the right end of the outer restraint tube 4 through high-strength bolts 12, and use an electric torque wrench to apply the specified pre-tension to the high-strength bolts 12.

[0051] So far, the assembly work of the present invention is completed.

[0052] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An assembled self-resetting double-stage energy dissipation support, Features include: A first energy-absorbing steel plate group (1) and a second energy-absorbing steel plate group (2) are located between the inner constraint tube (3) and the outer constraint tube (4); the planes on which the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2) are located are perpendicular to each other; two lateral constraint plates (5) and two pads (6) are welded on each surface of the inner constraint tube (3); The two end plates (8) pass through the two ends of the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2), respectively, and are in a fitting state with the end surfaces of the inner restraining tube (3) and the outer restraining tube (4); Four prestressed tendons (7) pass through the circular holes of the two end plates (8) and are fixed to the end plates (8) by means of anchor nuts (9); the first energy-absorbing steel plate group (1), the second energy-absorbing steel plate group (2) and the left connecting piece (10) are connected to the inner restraining tube connecting section (3a) by means of first bolts (12); the first energy-absorbing steel plate group (1), the second energy-absorbing steel plate group (2) and the right connecting piece (11) are connected to the outer restraining tube connecting section (4a) by means of second bolts (12).

2. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The first energy-absorbing steel plate group (1) is composed of four energy-absorbing steel plates of the same size, each of which comprises a yielding section (1a) with the smallest cross-section in the middle, connecting sections (1b) with the largest cross-sections at both ends, and an arc transition section (1c); the connecting section (1b) is provided with evenly distributed circular holes.

3. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The second energy-absorbing steel plate group (2) is composed of four energy-absorbing steel plates of the same size, each of which comprises a yielding section (2a) with the smallest cross-section in the middle, connecting sections (2b) with the largest cross-sections at both ends, and an arc transition section (2c). The left connecting section (2b) is provided with evenly distributed oblong holes, and the right connecting section (2b) is provided with evenly distributed circular holes.

4. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The inner restraining tube (3) is a square or rectangular cross-section steel tube formed by welding four steel plates, and a middle area of ​​a certain length is cut off at the left end of each steel plate of the inner restraining tube (3) to form a connecting section (3a); the connecting section (3a) is provided with evenly distributed circular holes.

5. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The outer restraining tube (4) is a square or rectangular cross-section steel tube formed by welding four steel plates. A middle area of ​​a certain length is cut off at the right end of each steel plate of the outer restraining tube (4) to form a connecting section (4a). The connecting section (4a) is provided with evenly distributed circular holes.

6. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: A portion of the triangular area is cut off at one end of the lateral restraining plate (5), and a certain gap exists between the lateral restraining plate (5) and the first energy-absorbing steel plate group (1) and the second energy-absorbing steel plate group (2).

7. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The thickness of the lateral restraining plate (5) is the same as the thickness of the first energy-absorbing steel plate group (1) or the second energy-absorbing steel plate group (2) in the same plane, and is smaller than the gap between the inner restraining tube (3) and the outer restraining tube (4); The thickness of the pad (6) is greater than the thickness of the lateral restraining plate (5) and smaller than the gap between the inner restraining tube (3) and the outer restraining tube (4).

8. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The number of the prestressed tendons (7) is four groups, and each group may be a single tendon or multiple tendons; the prestressed tendons (7) are made of fiber composite material tendons with high elastic deformation capability or shape memory alloy cables.

9. According to claim 1, an assembled self-resetting double-stage energy dissipation support, Features: The end plate (8) is symmetrically provided with four L-shaped slots at four corners, and is also symmetrically provided with four circular holes near the L-shaped slots.

10. The assembled self-resetting double-stage energy dissipation support according to claim 1, Features: The left connecting piece (10) and the right connecting piece (11) are both welded by four angle steels and a steel plate, and circular holes are opened on the angle steels and the steel plate; The left connecting piece (10) is longer than the right connecting piece (11).

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