Adjustable prestress inhaul cable reinforcing device for post-earthquake frame structure repair

Abstract

The invention discloses an adjustable prestressed inhaul cable reinforcing device for post-earthquake frame structure repair, which comprises a prestressed inhaul cable, a frame beam connecting piece and a frame column connecting piece, the frame beam connecting piece is used for being mounted on the lower surface of a frame beam, and the frame column connecting piece is used for being mounted on the outer surface of a frame column. The frame columns located at the two opposite ends of the frame beam are each provided with a frame column connecting piece, the positions of the frame column connecting pieces are higher than the positions of the frame beam connecting pieces, and the frame beam connecting pieces and the frame column connecting pieces are connected together through at least two prestress inhaul cables. Due to the fact that the frame column connecting plate is connected with the frame column through the bolt, the height of the frame column connecting plate can be adjusted at will, then the included angle between the oblique prestress inhaul cable and the frame beam can be flexibly adjusted, and the moment arm of the bending moment formed by the prestress inhaul cable is changed. The restoring force efficiency of the prestressed inhaul cable can be adjusted by flexibly adjusting the force arm, so that the working efficiency of the device for eliminating the vertical deflection of the frame beam is improved.

Description

Technical Field

[0001] The invention relates to the technical field of structural engineering, and in particular to an adjustable prestressed cable reinforcement device for repairing a frame structure after an earthquake. Background Art

[0002] After a reinforced concrete or pure steel frame structure encounters a horizontal earthquake, its structural components will be damaged to varying degrees. Since the design of the building structure generally follows the design principle of "strong columns and weak beams", the column components of a general structure can remain intact after an earthquake, while the beam components are prone to produce plastic hinges at the ends, which in turn produce excessive vertical deflections under the action of vertical deadweight and other vertical external loads. This vertical deflection can easily lead to fracture and damage of the beam components, and can also easily lead to insufficient support of the beam for the floor slab, causing the floor slab to fall and other problems. These problems are not conducive to the post-earthquake repair of the structure, and can easily cause secondary damage caused by structural collapse. In addition, if an aftershock occurs after a major earthquake, the beam components with excessive deflection are also prone to brittle fracture damage.

[0003] In order to repair the frame beam components after the earthquake, the following methods can be used:

[0004] (1) Vertical supports are provided at the bottom to prevent the beam components from falling. This method will significantly occupy the building space at the bottom and consume a large amount of materials. Since the component is a temporary component, the subsequent removal will cause additional labor, resulting in serious waste of labor and materials.

[0005] (2) By adding FRP to the bottom of the beam, vertical constraints are provided to further expand the beam deflection. Although this method can control the further expansion of the beam deflection, it cannot eliminate the vertical deflection that has already occurred, and therefore cannot achieve a good post-earthquake repair effect.

[0006] (3) By applying external prestress at the bottom of the beam, this method can eliminate the original vertical deflection by controlling the size of the tension prestress, and use the stiffness of the cable to prevent the further increase of the vertical deflection. However, since the prestress is only applied at the bottom, the efficiency of the prestressed cable is relatively low, and it is difficult to fix the cable at both ends. It is usually difficult to achieve efficient end anchoring connection in engineering. Summary of the invention

[0007] The purpose of the present invention is to provide an adjustable prestressed cable reinforcement device for post-earthquake frame structure repair in view of the technical defects existing in the prior art.

[0008] The technical solution adopted to achieve the purpose of the present invention is:

[0009] An adjustable prestressed cable reinforcement device for post-earthquake frame structure repair, comprising a prestressed cable, a frame beam connector and a frame column connector, wherein the frame beam connector is used to be installed on the lower surface of the frame beam, the frame column connector is used to be installed on the outer surface of the frame column, a frame column connector is installed on each of the frame columns located at opposite ends of the frame beam, the position of the frame column connector is higher than the position of the frame beam connector, the frame beam connector and the frame column connector are connected together by at least two prestressed cables, the prestressed cables are symmetrically arranged on the front and rear sides of the frame beam, the frame beam connector is in the middle position of the bottom of the frame beam, and the two frame column connectors are symmetrically arranged with the same height.

[0010] In the above technical solution, the number of the prestressed cables is 4.

[0011] In the above technical solution, the frame beam connector includes a frame beam connecting plate and four first connecting points located on the surface of the frame beam connecting plate, the frame column connector includes a frame column connecting plate and two second connecting points, one end of the prestressed cable is fixed on the first connecting point, and the other end is fixed on the second connecting point.

[0012] In the above technical solution, the second connection point is a prestressed torsion piece, the frame column connecting plate is in the shape of a rectangle, and two prestressed torsion pieces are symmetrically arranged in the length direction or width direction of the frame column connecting plate.

[0013] In the above technical solution, the first connection point is a fixing ring, the frame beam connecting plate is in the shape of a rectangle, and four fixing rings are symmetrically arranged in the length direction and the width direction of the frame beam connecting plate.

[0014] In the above technical solution, the prestressed torsion piece and the fixing ring are respectively connected to one end of the prestressed cable.

[0015] In the above technical solution, the position of the prestressed cable is higher than that of the fixing ring.

[0016] In the above technical solution, the frame column connecting plate is installed on the outer surface of the frame column by high-strength bolts, a plurality of bolt holes are opened on the frame column connecting plate, and the high-strength bolts are installed in the corresponding bolt holes.

[0017] In the above technical solution, the frame beam connecting plate is installed on the lower surface of the frame beam by high-strength bolts, bolt holes are opened on the frame beam connecting plate, and the high-strength bolts are installed in the corresponding bolt holes.

[0018] In the above technical solution, the position of the frame column connecting plate is higher than the position of the frame beam connecting plate.

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

[0020] 1. The reinforcement device of the present invention is provided with a frame beam connecting plate and a frame column connecting plate at the bottom of the frame beam and the outside of the frame column respectively, thereby forming an effective anchoring end for the prestressed cable; by adjusting the height of the frame column connecting plate, the working efficiency of the bending moment arm lifting device formed by the prestressed cable system to eliminate the vertical deflection of the beam can be flexibly changed; the prestressed tensioning method is more convenient and effective; the reinforcement device does not need to be disassembled after the structure is repaired, and can be used as a permanent component of the structural system to improve the vertical bearing performance of the frame beam component.

[0021] 2. In the present invention, since the frame column connecting plate is connected to the frame column by bolts, the height of the frame column connecting plate can be adjusted at will, and then the angle between the oblique prestressed cable and the frame beam can be flexibly adjusted, thereby changing the bending moment arm formed by the prestressed cable; by flexibly adjusting the size of the arm, the restoring force efficiency of the prestressed cable can be adjusted, thereby improving the working efficiency of the device in eliminating the vertical deflection of the frame beam.

[0022] 3. The prestressing tensioning of the present invention is achieved by twisting the prestressing twisting piece at the end of the prestressing cable, ensuring that the prestressing tensioning of the prestressing cable is convenient and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the reinforcement device of an embodiment of the present invention.

[0024] Figure 2 It is a front view of the reinforcement device according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of a frame beam connector according to an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of a frame beam connector according to an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of a frame beam connector according to an embodiment of the present invention.

[0028] Figure 6 Schematic diagram of a frame column connector according to an embodiment of the present invention.

[0029] Figure 7 Schematic diagram of a frame column connector according to an embodiment of the present invention.

[0030] Figure 8 Schematic diagram of a frame column connector according to an embodiment of the present invention.

[0031] Among them: 1: prestressed cable, 2: frame beam connecting piece, 3: frame column connecting piece, 4: frame beam connecting plate, 5: fixing ring, 6: frame column connecting plate, 7: prestressed torsion piece; 8: bolt hole, 9: high-strength bolt, 10: frame beam, 11: frame column. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Example 1

[0034] like Figure 1-Figure 8 As shown, an adjustable prestressed cable reinforcement device for post-earthquake frame structure repair includes a prestressed cable 1, a frame beam connector 2 and a frame column connector 3. The frame beam connector 2 is used to be installed on the lower surface of the frame beam 10, and a frame column connector 3 is installed on the outer surface of the frame columns 11 located at the opposite ends of the frame beam 10. Specifically, the frame beam connector 2 is in the middle position of the bottom of the frame beam 10, and the two frame column connectors 3 are symmetrically arranged with the same height.

[0035] The frame beam connector 2 and the frame column connector 3 are connected together by two prestressed cables 1. The two prestressed cables 1 are located at the front and rear sides of the frame beam 10 to fix the frame structure composed of the frame beam 10 and the frame column 11 together.

[0036] The frame beam connector 2 includes a frame beam connector plate 4 and four first connection points located on the surface of the frame beam connector plate 4, the frame column connector 3 includes a frame column connector plate 6 and two second connection points, one end of the prestressed cable 1 is fixed at the first connection point, and the other end is fixed at the second connection point.

[0037] The position of the frame column connecting plate 6 is higher than that of the frame beam connecting plate 4, and the position of the second connection point is higher than that of the frame beam 10, so that the prestressed cable 1 can better fix the frame structure composed of the frame beam 10 and the frame column 11 together.

[0038] Example 2

[0039] To further make the prestress adjustable, on the basis of Example 1, the second connection point is a prestressed torsion piece 7, the shape of the frame column connecting plate 6 is rectangular, and two prestressed torsion pieces 7 are symmetrically arranged in the length direction or width direction of the frame column connecting plate 6. By applying torque to the prestressed torsion piece 7, prestress can be applied to the prestressed cable 1. The prestressed torsion piece 7 is used to connect the other end of the prestressed cable 1, and is installed on the outer surface of the frame column 11 through high-strength bolts 9 on the frame column connecting plate 6. A plurality of bolt holes 8 are opened on the frame column connecting plate 6, and the high-strength bolts 9 are installed in the corresponding bolt holes 8.

[0040] Example 3

[0041] On the basis of embodiments 1 and 2, the first connection point is a fixing ring 5, the shape of the frame beam connecting plate 4 is rectangular, and four fixing rings 5 ​​are symmetrically arranged in the length direction and the width direction of the frame beam connecting plate 4. The fixing ring 5 is used to connect one end of the prestressed cable 1, the frame beam connecting plate 4 is installed on the lower surface of the frame beam 10 through high-strength bolts 9, and bolt holes 8 are opened on the frame beam connecting plate 4, and the high-strength bolts 9 are installed in the corresponding bolt holes 8.

[0042] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0043] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable prestressed cable reinforcement device for post-earthquake frame structure repair, characterized in that: It includes prestressed cables, frame beam connectors and frame column connectors, the frame beam connectors are used to be installed on the lower surface of the frame beam, the frame column connectors are used to be installed on the outer surface of the frame column, and the frame columns located at the opposite ends of the frame beam are each installed with a frame column connector, the position of the frame column connector is higher than the position of the frame beam connector, the frame beam connector and the frame column connector are connected together by at least two prestressed cables, the prestressed cables are symmetrically arranged on the front and rear sides of the frame beam, the frame beam connector is in the middle position of the bottom of the frame beam, and the two frame column connectors are symmetrically arranged with the same height.

2. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 1 is characterized in that: The number of the prestressed cables is 4.

3. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 1 is characterized in that: The frame beam connector includes a frame beam connecting plate and four first connecting points located on the surface of the frame beam connecting plate, the frame column connector includes a frame column connecting plate and two second connecting points, one end of the prestressed cable is fixed on the first connecting point, and the other end is fixed on the second connecting point.

4. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 3 is characterized in that: The second connection point is a prestressed torsion piece, the frame column connecting plate is in the shape of a rectangle, and two prestressed torsion pieces are symmetrically arranged in the length direction or the width direction of the frame column connecting plate.

5. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 4 is characterized in that: The first connection point is a fixed ring, the frame beam connecting plate is in the shape of a rectangle, and four fixed rings are symmetrically arranged in the length direction and the width direction of the frame beam connecting plate.

6. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 5, characterized in that: The prestressed torsion piece and the fixing ring are respectively connected to one end of the prestressed cable.

7. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 5, characterized in that: The position of the prestressed cable is higher than that of the fixing ring.

8. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 1, characterized in that: The frame column connecting plate is installed on the outer surface of the frame column through high-strength bolts, a plurality of bolt holes are opened on the frame column connecting plate, and the high-strength bolts are installed in the corresponding bolt holes.

9. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 1, characterized in that: The frame beam connecting plate is installed on the lower surface of the frame beam through high-strength bolts, bolt holes are opened on the frame beam connecting plate, and the high-strength bolts are installed in the corresponding bolt holes.

10. The adjustable prestressed cable reinforcement device for post-earthquake frame structure repair according to claim 1, characterized in that: The position of the frame column connecting plate is higher than that of the frame beam connecting plate.

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