Joint device with controllable displacement limit value for reinforced concrete structure

Abstract

The utility model discloses a displacement limit controllable node device for a reinforced concrete structure, which comprises an SMA core material, an outer sleeve, a steel encircling support, a steel pin anchoring support, a steel pin and a fastening nut, the outer sleeve is of a cylindrical structure with a hollow shaft cavity, connecting holes are formed in the side walls of the two ends of the outer sleeve in the length direction, and the fastening nut is arranged in the outer sleeve. And each group of connecting holes are elliptical connecting holes which are symmetrical relative to the axis of the outer sleeve. The oval connecting holes in the two ends of the outer sleeve can limit the deformation displacement value of the shape memory alloy bar and the soft steel spring, namely, the controllable effect is achieved, restoring force can be provided through combination of the shape memory alloy bar, the soft steel spring and the outer sleeve, so that the joint has the self-resetting capacity in the earthquake process, and therefore the earthquake resistance is improved. And meanwhile, after the joint returns to the normal state, the outer sleeve serves as a pull rod to limit excessive deformation of the joint, so that the deformation rigidity, the bearing capacity, the ductility and the energy dissipation capacity of the joint are improved, and the joint is endowed with a good active anti-seismic function.

Description

Technical Field

[0001] The utility model relates to a node device for a reinforced concrete structure with controllable displacement limit. Background Art

[0002] The beam-column joint is very important for the entire building structure, so the seismic performance of the beam-column joint needs to be strengthened. In the prior art, the beam-column joint is generally strengthened by increasing the amount of concrete at the beam-column joint. However, this method requires formwork and wet concrete work, which is complicated to operate, has low work efficiency, and the displacement limit is uncontrollable.

[0003] Therefore, a node device for reinforced concrete structure with controllable displacement limit which is simple in structure and easy to install is urgently needed. Utility Model Content

[0004] In order to solve the defects in the prior art, the utility model provides a node device for a reinforced concrete structure with controllable displacement limit.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model provides a node device for reinforced concrete structure with controllable displacement limit, comprising an SMA core material, an outer sleeve, a steel sleeve support, a steel pin anchor support, a steel pin and a fastening nut, wherein the steel sleeve support is sleeved on a steel beam and a steel column arranged orthogonally to each other, the steel pin anchor support is arranged on the steel sleeve support, the outer sleeve is a cylindrical structure with a hollow axial cavity, at least one group of connecting holes are arranged on the side walls at both ends in the length direction of the outer sleeve, each group of connecting holes is an elliptical connecting hole symmetrical with respect to the axis of the outer sleeve, the steel pin is penetrated in the elliptical connecting hole and installed on the steel pin anchor support through a fastening nut; the SMA core material is arranged in the outer sleeve and its two ends in the length direction are sleeved on the steel pin.

[0007] Preferably, the SMA core material comprises at least two shape memory alloy rods and at least one soft steel spring distributed along the length direction of the steel pin, and a soft steel spring is arranged between any two adjacent shape memory alloy rods.

[0008] Preferably, the steel sleeve support is a U-shaped structure.

[0009] Preferably, the steel pin anchor support includes two trapezoidal fixing plates, the trapezoidal fixing plates are provided with mounting through holes, and the two ends of the steel pin in the length direction are inserted into the mounting through holes.

[0010] Preferably, the major axis direction of the elliptical connecting hole is consistent with the axial direction of the outer sleeve, and the minor axis direction of the elliptical connecting hole is consistent with the circumferential direction of the outer sleeve.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The elliptical connection holes at both ends of the outer sleeve in the utility model can limit the deformation displacement value of the shape memory alloy rod and the soft steel spring, that is, play a controllable role. Through the combination of the shape memory alloy rod, the soft steel spring and the outer sleeve, the structure is simple, the construction is convenient and fast, and the work efficiency is greatly improved. The restoring force can be provided to enable the node to have the ability to self-reset during the deformation of the earthquake process. At the same time, after returning to the normal state, the outer sleeve acts as a pull rod to limit the excessive deformation of the node, thereby improving the deformation stiffness, bearing capacity, ductility and energy consumption capacity of the node, and giving the node a good active anti-seismic function. The utility model can be applied to the fields of reconstruction, reinforcement and new construction of building structures, especially for protecting buildings, important buildings and lifeline projects, etc. It has important practical significance and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a node device for reinforced concrete structure with controllable displacement limit value of the utility model;

[0014] Figure 2 It is a structural schematic diagram of an SMA core material and an outer sleeve in a node device for a reinforced concrete structure with controllable displacement limit of the utility model;

[0015] Figure 3 The utility model is a structural schematic diagram of a steel sleeve support, a steel pin anchor support, a steel pin and a fastening nut in a node device for a reinforced concrete structure with controllable displacement limit. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] In the description of the present invention, it should be understood that the terms "left" and "right" indicate directions or positional relationships based on the drawings in the specification. Figure 1 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.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figures 1 to 3 As shown, this embodiment provides a node device for reinforced concrete structure with controllable displacement limit, including an SMA core material 1, an outer sleeve 2, a steel sleeve support 3, a steel pin anchor support 4, a steel pin 5 and a fastening nut 6.

[0020] like Figure 3 As shown, the steel sleeve support 3 is a U-shaped structure, and the steel sleeve support 3 is sleeved on the steel beams and steel columns that are orthogonally arranged.

[0021] like Figure 3 As shown, the steel pin anchor support 4 includes two trapezoidal fixing plates, which are installed on the steel sleeve support 3. The trapezoidal fixing plates are provided with mounting holes, and the two ends of the steel pin in the length direction are inserted into the mounting holes.

[0022] like Figure 2 As shown, the outer sleeve 2 is a cylindrical structure with a hollow shaft cavity. Three groups of connection holes are provided on the side walls at both ends of the length direction of the outer sleeve 2. Each group of connection holes is an elliptical connection hole 21 symmetrical with respect to the axis of the outer sleeve. The steel pin 5 is inserted into the elliptical connection hole 21 and installed on the steel pin anchor support 4 through a fastening nut 6. The SMA core material 1 includes three shape memory alloy rods 11 and two soft steel springs 12 distributed along the length direction of the steel pin, and a soft steel spring 12 is provided between any two adjacent shape memory alloy rods 11. The shape memory alloy rods 11 and the two soft steel springs 12 are arranged in the outer sleeve 2 and the two ends of the length direction thereof are sleeved on the steel pin 5. Among them, the long axis direction of the elliptical connection hole 21 is consistent with the axis direction of the outer sleeve 2, and the short axis direction of the elliptical connection hole 21 is consistent with the circumferential direction of the outer sleeve 2.

[0023] The working principle of this embodiment is further described below:

[0024] After the steel pin anchor support is welded to the U-shaped steel sleeve support in advance and the direction is adjusted according to the design requirements, the two U-shaped steel sleeve supports are respectively mounted on the mutually orthogonal steel beams and steel columns. Then, the two ends of the SMA core material are installed at the steel pin anchor support through steel pins and nuts, and the two ends of the outer sleeve are also installed at the steel pin anchor support through steel pins and nuts.

[0025] In this embodiment, the elliptical connection holes at both ends of the outer sleeve can limit the deformation displacement value of the shape memory alloy rod and the soft steel spring, that is, play a controllable role. During the deformation of the earthquake process, when the node changes from a right angle to an acute angle, the SMA core material is squeezed and begins to rebound to provide a restoring force; when the node changes from a right angle to an obtuse angle, the outer sleeve is stretched and begins to become a pull rod to provide tension. Therefore, the node has a good active seismic function, in which the restoring force and the tension can be calculated as design parameters through material strength and component cross-sectional area.

[0026] According to the design requirements, multiple arrangements can be made for different nodes, which can further improve the overall active seismic resistance of the reinforced concrete structure.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A node device for reinforced concrete structure with controllable displacement limit, characterized in that: The invention comprises an SMA core material (1), an outer sleeve (2), a steel sleeve support (3), a steel pin anchor support (4), a steel pin (5) and a fastening nut (6), wherein the steel sleeve support (3) is sleeved on a steel bar cross beam and a steel bar column arranged orthogonally to each other, and the steel pin anchor support (4) is arranged on the steel sleeve support (3). The outer sleeve (2) is a cylindrical structure with a hollow axial cavity. At least one group of connecting holes is provided on the side walls at both ends in the length direction of the outer sleeve (2), and each group of connecting holes is an elliptical connecting hole (21) symmetrical with respect to the axis of the outer sleeve. The steel pin (5) is inserted into the elliptical connecting hole (21) and is installed on the steel pin anchor support (4) through a fastening nut (6); the SMA core material (1) is arranged in the outer sleeve (2) and its two ends in the length direction are sleeved on the steel pin (5).

2. The node device for reinforced concrete structure with controllable displacement limit according to claim 1, characterized in that: The SMA core material (1) comprises at least two shape memory alloy rods (11) and at least one soft steel spring (12) distributed along the length direction of the steel pin, and a soft steel spring (12) is arranged between any two adjacent shape memory alloy rods (11).

3. The node device for reinforced concrete structure with controllable displacement limit according to claim 1, characterized in that: The steel sleeve support (3) is a U-shaped structure.

4. The node device for reinforced concrete structure with controllable displacement limit according to claim 1, characterized in that: The steel pin anchor support (4) comprises two trapezoidal fixing plates, each of which is provided with a mounting through hole, and both ends of the steel pin in the length direction are inserted into the mounting through holes.

5. The node device for reinforced concrete structure with controllable displacement limit according to claim 1, characterized in that: The long axis direction of the elliptical connection hole (21) is consistent with the axial direction of the outer sleeve (2), and the short axis direction of the elliptical connection hole (21) is consistent with the circumferential direction of the outer sleeve (2).

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