阅读说明：本技术 一种自锁式锚固形状记忆合金预应力加固装置 (Self-locking anchoring shape memory alloy prestress reinforcing device ) 是由 邓军 黄海帆 李俊辉 谢燕 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种自锁式锚固形状记忆合金预应力加固装置,包括钢梁、承拉板、单程形状记忆合金薄板、上楔块、下楔块和侧板,单程形状记忆合金薄板沿承拉板的长度方向绕接在承拉板上,承拉板设于钢梁的底面上；承拉板的侧面上均连接有下楔块,侧板可滑动套设于钢梁的底部侧面上,下楔块与开口的下内侧面可滑动连接,上楔块与开口的上内侧面可滑动连接。本发明通过单程形状记忆合金的变形力作为动力,即可实现对钢梁的预应力施加,无需对钢梁做任何加工而不会对钢梁的承载力产生影响,并且通过楔块与楔块之间位移上的相互限制,实现自行锚固,无需使用螺栓作为锚固件,具有结构简单、施工方便和效率高的有益效果。(The invention discloses a self-locking anchoring shape memory alloy prestress reinforcing device, which comprises a steel beam, a bearing plate, a one-way shape memory alloy thin plate, an upper wedge block, a lower wedge block and a side plate, wherein the one-way shape memory alloy thin plate is wound on the bearing plate along the length direction of the bearing plate, and the bearing plate is arranged on the bottom surface of the steel beam; the side surfaces of the tension bearing plates are connected with lower wedge blocks, the side plates are slidably sleeved on the side surfaces of the bottoms of the steel beams, the lower wedge blocks are slidably connected with the lower inner side surfaces of the openings, and the upper wedge blocks are slidably connected with the upper inner side surfaces of the openings. The invention can realize the prestress application to the steel beam by taking the deformation force of the one-way shape memory alloy as the power, does not need to process the steel beam and does not influence the bearing capacity of the steel beam, realizes the self-anchoring by the mutual limitation of the displacement between the wedge block and the wedge block, does not need to use a bolt as an anchoring part, and has the advantages of simple structure, convenient construction and high efficiency.)

1. A self-locking anchoring shape memory alloy prestress reinforcing device is characterized by comprising a steel beam, a bearing plate, a one-way shape memory alloy thin plate, an upper wedge block, a lower wedge block and a side plate, wherein the one-way shape memory alloy thin plate is wound on the bearing plate along the length direction of the bearing plate, and the bearing plate is arranged on the bottom surface of the steel beam; the side surfaces of the bearing plates in the width direction are both connected with lower wedge blocks, the side plates are slidably sleeved on the side surfaces of the bottoms of the steel beams through the openings, the lower wedge blocks are slidably connected with the lower inner side surfaces of the openings, and the upper wedge blocks are slidably connected with the upper inner side surfaces of the openings; after the one-way shape memory alloy thin plate is heated to martensite inverse phase transformation, the one-way shape memory alloy thin plate is deformed, extended and shortened to drive the pulling plate to move forwards, the pulling plate drives the lower wedge block to move forwards, the lower wedge block pushes the side plate to move forwards, and the side plate slides towards the upper wedge block to be pressed against the wedge-shaped surface of the upper wedge block to form a force-increasing locking structure.

2. The self-locking type prestressed reinforcement device for anchoring shape memory alloy according to claim 1, wherein said lower wedge block is provided with an "L" -shaped groove, and the side surface of said tension bearing plate in the width direction is provided with an "L" -shaped connecting block, said "L" -shaped connecting block being fitted in said "L" -shaped groove to connect said tension bearing plate to said lower wedge block.

3. The self-locking anchoring shape memory alloy pre-stress reinforcing device according to claim 1 or 2, wherein the wedge-shaped surface of the lower wedge block is provided with a first sliding groove with equal depth, the lower inner side surface of the opening is provided with a first protrusion, and the first protrusion is slidably sleeved in the first sliding groove to connect the lower wedge block and the side plate together.

4. The self-locking type prestressed reinforcement device for anchoring shape memory alloy according to claim 1, wherein the wedge-shaped surface of the upper wedge block is provided with a second sliding groove with equal depth, the upper inner side surface of the opening is provided with a second protrusion, and the second protrusion is slidably sleeved in the second sliding groove to connect the upper wedge block and the side plate together.

5. The self-locking anchored shape memory alloy pre-stress reinforcing device according to claim 1, wherein the number of turns of the one-way shape memory alloy thin plate wound on the tension bearing plate is not less than 1.5.

6. The self-locking anchored shape memory alloy pre-stress reinforcement device of claim 3, wherein the upper surface of the first protrusion is an inclined surface parallel to the wedge surface of the lower wedge.

7. The self-locking anchored shape memory alloy pre-stress reinforcement device of claim 4, wherein the bottom surface of the second protrusion is an inclined surface parallel to the wedge surface of the upper wedge.

8. The self-locking anchored shape memory alloy pre-stress reinforcement device of claim 1, wherein the angle between the wedge-shaped surface of the lower wedge and the upper wedge and the horizontal plane is 2 to 8 degrees.

9. The self-locking anchoring shape memory alloy pre-stress reinforcing device according to claim 1 or 5, wherein the single-pass shape memory alloy sheet is made of Ni-Ti based single-pass shape memory alloy.

10. The self-locking anchored shape memory alloy pre-stress reinforcement device of claim 1, wherein the steel beam is an i-steel.

Technical Field

The invention relates to a reinforcing device, in particular to a self-locking anchoring shape memory alloy prestress reinforcing device.

Background

A commonly used steel beam prestress reinforcement method is an external prestress reinforcement method, in which other materials that can be used for prestress reinforcement are anchored to a steel beam, and the steel beam is prestressed by applying prestress to the materials. This method requires holes to be made in the steel beam and anchoring other materials to the steel beam by bolts or other anchors. Because need be trompil on the material, this mode can lead to the certain degree destruction to the girder steel, leads to the cross-section of girder steel to change, and then leads to stress concentration easily, reduces the bearing capacity of girder steel self to it is numerous to apply the process, and the installation is complicated.

Disclosure of Invention

The invention aims to solve the problems and provides a self-locking anchoring shape memory alloy prestress reinforcing device which is simple in structure, convenient to construct and high in efficiency. The reinforcing device can realize prestress application to the steel beam by taking the deformation force of the one-way shape memory alloy as power without any processing on the steel beam and influencing the bearing capacity of the steel beam, realizes self-anchoring by mutual limitation of displacement between the wedge blocks, and does not need to use bolts as anchoring parts.

The purpose of the invention can be achieved by adopting the following technical scheme:

a self-locking anchoring shape memory alloy prestress reinforcing device comprises a steel beam, a bearing and pulling plate, a single-pass shape memory alloy thin plate, an upper wedge block, a lower wedge block and a side plate, wherein the single-pass shape memory alloy thin plate is wound on the bearing and pulling plate along the length direction of the bearing and pulling plate, and the bearing and pulling plate is arranged on the bottom surface of the steel beam; the side surfaces of the bearing plates in the width direction are both connected with lower wedge blocks, the side plates are slidably sleeved on the side surfaces of the bottoms of the steel beams through the openings, the lower wedge blocks are slidably connected with the lower inner side surfaces of the openings, and the upper wedge blocks are slidably connected with the upper inner side surfaces of the openings; after the one-way shape memory alloy thin plate is heated to martensite inverse phase transformation, the one-way shape memory alloy thin plate is deformed, extended and shortened to drive the pulling plate to move forwards, the pulling plate drives the lower wedge block to move forwards, the lower wedge block pushes the side plate to move forwards, and the side plate slides towards the upper wedge block to be pressed against the wedge-shaped surface of the upper wedge block to form a force-increasing locking structure.

Preferably, the lower wedge block is provided with an L-shaped groove, the side surface of the tensile plate in the width direction is provided with an L-shaped connecting block, and the L-shaped connecting block is sleeved in the L-shaped groove to connect the tensile plate to the lower wedge block.

As a preferable scheme, a wedge-shaped surface of the lower wedge block is provided with a first sliding groove with equal depth, a lower inner side surface of the opening is provided with a first protrusion, and the first protrusion is slidably sleeved in the first sliding groove to connect the lower wedge block and the side plate together.

As a preferable scheme, a second sliding groove with the same depth is formed in the wedge-shaped surface of the upper wedge block, a second protrusion is arranged on the upper inner side surface of the opening, and the second protrusion is slidably sleeved in the second sliding groove to connect the upper wedge block and the side plate together.

Preferably, the number of turns of the one-way shape memory alloy thin plate wound on the tension plate is not less than 1.5.

Preferably, the upper surface of the first protrusion is an inclined surface parallel to the wedge surface of the lower wedge.

Preferably, the bottom surface of the second protrusion is an inclined surface parallel to the wedge surface of the upper wedge.

Preferably, the included angle between the wedge surfaces of the lower wedge and the upper wedge and the horizontal plane is 2 to 8 degrees.

In a preferred embodiment, the single-pass shape memory alloy thin plate is made of a Ni — Ti-based single-pass shape memory alloy.

Preferably, the steel beam is an i-steel.

The implementation of the invention has the following beneficial effects:

1. the invention prestresses the single-pass shape memory alloy thin plate before the single-pass shape memory alloy thin plate is wound on the pulling plate, so that the single-pass shape memory alloy thin plate generates enough deformation, then the pulling plate is connected to the lower inner side surface of the opening of the side plate through the lower wedge block, the side plate is sleeved on the bottom of the steel beam, the upper wedge block is arranged on the upper inner side surface of the opening of the side plate, at the moment, the whole device is in a loose state, and the single-pass shape memory alloy is heated by using a heat source. When the one-way shape memory alloy thin plate is heated to the martensite reverse phase transition temperature, the one-way shape memory alloy thin plate starts to recover to the state before stretching, the one-way shape memory alloy thin plate deforms and shortens to drive the pulling plate to move forwards, the pulling plate drives the lower wedge block to move forwards, the lower wedge block pushes the side plate to move forwards, the side plate slides towards the upper wedge block and is pressed against the wedge surface of the upper wedge block, and therefore the whole device is changed from the original loose state to the tight connection state, and the self-anchoring of the one-way shape memory alloy thin plate is completed. The invention can realize the prestress application to the steel beam by taking the deformation force of the one-way shape memory alloy as the power, does not need to process the steel beam and does not influence the bearing capacity of the steel beam, realizes the self-anchoring by the mutual limitation of the displacement between the wedge block and the wedge block, does not need to use a bolt as an anchoring part, and has the advantages of simple structure, convenient construction and high efficiency.

2. When the pull plate drives the lower wedge block to move forward, the first sliding groove of the lower wedge block pushes the first protrusion to push the side plate to move forward to form a boosting pushing structure, and then the side plate slides towards the upper wedge block to push the second protrusion to the second sliding groove of the upper wedge block to form a boosting locking structure, so that the whole device is changed from an original loose state to a tight connection state, and the self-anchoring of the one-way shape memory alloy sheet is completed. This structure passes through wedge reinforcement structure drive curb plate motion with lower wedge ingeniously, has improved the stability and the reliability of lower wedge drive curb plate motion to the curb plate compresses tightly on last voussoir through reinforcement locking structure, has improved the fastening nature of being connected of curb plate and last wedge, thereby realizes the anchor by oneself of whole device, need not to use the bolt as anchoring member, has simple structure, construction convenience and efficient advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the self-locking anchoring shape memory alloy pre-stress reinforcing device of the present invention;

FIG. 2 is a schematic structural diagram of the self-locking anchoring shape memory alloy pre-stress reinforcing device according to the present invention;

FIG. 3 is a side view of the one-way shape memory alloy sheet wrapped on the tension bearing plate of the self-locking anchoring shape memory alloy pre-stress reinforcing device of the present invention;

FIG. 4 is a schematic structural diagram of an upper wedge block of the self-locking anchoring shape memory alloy pre-stress reinforcing device according to the present invention;

FIG. 5 is a schematic structural diagram of a lower wedge block of the self-locking anchoring shape memory alloy pre-stress reinforcing device according to the present invention;

FIG. 6 is a rear view of FIG. 5;

FIG. 7 is a schematic structural diagram of a side plate of the self-locking anchoring shape memory alloy pre-stress reinforcing device according to the present invention;

FIG. 8 is a schematic structural diagram of a tension bearing plate of the self-locking anchoring shape memory alloy pre-stress reinforcing device of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.