CN216955055U - Sling damage experimental device and bridge model - Google Patents
Sling damage experimental device and bridge model Download PDFInfo
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- CN216955055U CN216955055U CN202220545146.4U CN202220545146U CN216955055U CN 216955055 U CN216955055 U CN 216955055U CN 202220545146 U CN202220545146 U CN 202220545146U CN 216955055 U CN216955055 U CN 216955055U
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- 238000002474 experimental method Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 3
- 238000003556 assay Methods 0.000 claims 3
- 238000009423 ventilation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 238000011160 research Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to the technical field of bridge sling models, in particular to a sling damage experimental device and a bridge model. The elastic element in one embodiment uses a plurality of springs, and the tension of the springs is in a linear relation with the elongation of the springs, so that the experimental data are accurate, and the state of the bridge model when the sling is damaged is easy to evaluate.
Description
Technical Field
The utility model relates to the technical field of bridge sling models, in particular to a sling damage experimental device and a bridge model.
Background
Various cable bridge types are widely used in bridge construction. However, the cable is the weakest link of the structure while serving as an important force transmission and bearing component of the bridge. The cable is very easy to be damaged by fatigue, corrosion, wire breakage and the like, once the cable is damaged, the stress performance of the full bridge can be changed, the stress of the full bridge can be redistributed, the bridge can be collapsed when the stress is serious, and a plurality of examples of bridge collapse caused by the damage of the suspension rods (cables) already exist at home and abroad. Therefore, it is necessary to study the identification of damage to the boom (cable).
Because the damage identification research of the suspender (cable) can not be carried out on the real bridge, the whole bridge model experiment becomes an important means of the damage identification research of the suspender (cable). A conventional model design for health monitoring and damage identification of an arch bridge suspender is mostly designed according to a similar theory by a reduced scale model. The hanger rod (cable) is generally simulated by proportionally selecting a steel wire rope or an iron wire with smaller diameter. In the past, researchers mostly adopt a mode of loosening an anchor at the end of a suspender (cable), reducing the cross section area (cutting section) of the suspender (cable) or reducing the elastic modulus of a material (replacing the whole suspender) to simulate the damage of the suspender (cable). In the actual experiment of the methods, the damage degree of the suspender cannot be accurately and quantitatively simulated, and the material recycling rate is not high and is troublesome.
Therefore, it is urgently needed to design and manufacture an arch bridge and cable-stayed bridge experimental model which can be repeatedly used and can simulate damage for many times without replacing and cutting the damaged suspension rod (cable). The method is used for the damage identification research of the cable structure cable. The method mainly solves the problems that the experimental process is very troublesome and the preset damage degree cannot be accurately controlled due to the fact that the hanger rod (cable) is frequently replaced in the cable structure cable damage identification research process.
Disclosure of Invention
The embodiment of the utility model provides a sling damage experimental device and a bridge model, and aims to solve the problems that in the prior art, in the process of identifying and researching damage of a cable structure cable, sling is frequently replaced, so that the experimental process is troublesome, and the preset damage degree cannot be accurately controlled.
In a first aspect, an embodiment of the present invention provides a sling damage testing apparatus, including:
the flexible cable, the two connecting discs, the elastic element and the lifting eye bolt;
the two connecting discs comprise a first connecting disc and a second connecting disc;
two ends of the elastic element are detachably connected with the back surfaces of the two connecting discs respectively, the flexible cable is hooked with the front surface of the first connecting disc, and the ring of the lifting eye bolt is hooked with the front surface of the second connecting disc;
wherein the rigidity of the elastic element is lower than the rigidity of the flexible cable, the two connecting discs and the eyebolt.
In one possible implementation, the wire comprises: the flexible cable comprises a flexible cable body and a connecting sheet, wherein connecting holes are formed in two ends of the connecting sheet, one end of the connecting sheet is hooked with the first connecting disc through the connecting holes, the other end of the connecting sheet is hooked with the flexible cable body through the connecting holes, and the rigidity of the connecting sheet and the rigidity of the flexible cable body are higher than that of the elastic element.
In one possible implementation, the wire comprises: the tension meter is characterized by comprising a flexible cable body and a tension meter, wherein hooks or rings are arranged at two ends of the tension meter for measuring force, one end of the tension meter is hooked with the first connecting disc, the other end of the tension meter is hooked with the flexible cable body, and the rigidity of the tension meter and the rigidity of the flexible cable body are higher than that of the elastic element.
In one possible implementation, the wire comprises: the flexible cable body is hooked with the first connecting disc, and the rigidity of the flexible cable body is higher than that of the elastic element.
In one possible implementation, the elastic element includes: a plurality of tension springs;
the two connecting discs are respectively provided with a plurality of holes, and the holes are symmetrically arranged by the center of the connecting discs;
the plurality of tension springs are hooked with the first connecting disc and the second connecting disc through the plurality of holes.
In one possible implementation, the elastic element includes: a cylinder and a breather valve;
the cylinder body of the cylinder is hinged or hooked with the first connecting disc, and a piston rod of the cylinder is hinged or hooked with the second connecting disc;
one port of the vent valve is communicated with a first port of the cylinder, and the first port is an air port of a rodless cavity of the cylinder.
In one possible implementation, the elastic element further includes: a barometer in communication with the first port.
In a second aspect, an embodiment of the present invention provides a bridge model, which includes a plurality of sling damage experiment apparatuses as described in the first aspect, wherein the sling damage experiment apparatuses are used as force bearing parts of a bridge deck and are connected with the bridge deck.
In one possible implementation, the bridge model includes: the bridge comprises an arch rib, a bridge deck, two piers and a plurality of sling damage experiment devices according to the first aspect, wherein the arch rib is arc-shaped, parabolic or catenary, the two ends of the arch rib and the two ends of the bridge deck are respectively connected with the two piers, one end of the sling damage experiment device is connected with the arch rib, and the other end of the sling damage experiment device is connected with the bridge deck.
Compared with the prior art, the implementation mode of the utility model has the following beneficial effects:
the embodiment of the utility model discloses a sling damage experimental device and a bridge model, which are provided with an elastic element, wherein the elastic element is used as the weakest point of the whole sling damage experimental device, and the state of a sling in the bridge model when the sling is damaged can be reflected by replacing, adjusting or reducing the elastic element. The elastic element in one embodiment uses a plurality of springs, and the tension of the springs is in a linear relation with the elongation of the springs, so that the experimental data are accurate, and the state of the bridge model when the sling is damaged is easily evaluated.
The center of the hanging ring connection point and the center of the plurality of holes of the connection disc coincide with the center of the connection disc, so that the stress axis of the sling damage experiment device coincides with the connection line of the connection point, and the force measurement is more accurate during damage test.
According to the sling damage experimental device, the elastic element is the air cylinder with the vent valve at the vent hole, the vent valve is connected with the vacuum pump, the vacuum degree of the air cylinder is adjusted, and the purpose of adjusting the rigidity of the air cylinder is achieved. The rigidity of the cylinder and the stroke of the piston are in a linear relation, so that the measured data are accurate and reliable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a front view of a sling damage testing device using a spring according to an embodiment of the present invention;
FIG. 2 is a front view of a sling damage testing device with a connecting piece according to an embodiment of the utility model;
FIG. 3 is a front view of a sling damage testing device using a cylinder according to an embodiment of the present invention;
FIG. 4 is a front view of a connector disc provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of a spring element provided by an embodiment of the present invention;
FIG. 6 is a front view of a bridge model according to an embodiment of the present invention.
In the figure:
1 a first splice tray;
2 a second connecting disc;
3, a flexible cable body;
4, connecting sheets;
5, a tension spring;
6 air cylinders;
7, an eye bolt;
8 a vent valve;
9, a barometer;
10 arch ribs;
11 a bridge deck;
12 pier.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the utility model. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made with reference to the accompanying drawings.
The following examples are given for the detailed implementation and specific operation of the present invention, and the scope of the present invention is not limited to the following examples.
The embodiment of the utility model provides a sling damage experimental device, which comprises:
a flexible cable, two connecting discs, an elastic element and an eye bolt 7;
the two connecting discs comprise a first connecting disc 1 and a second connecting disc 2;
two ends of the elastic element are detachably connected with the back surfaces of the two connecting discs respectively, the flexible cable is hooked with the front surface of the first connecting disc 1, and the ring of the lifting eye bolt 7 is hooked with the front surface of the second connecting disc 2;
wherein the stiffness of the elastic element is lower than the stiffness of the flexible cable, the two connection discs and the eye bolt 7.
In one embodiment, the wire comprises: the flexible cable body 3 is hooked with the first connecting disc 1, and the rigidity of the flexible cable body 3 is higher than that of the elastic element.
In one embodiment, the elastic element comprises: a plurality of tension springs 5;
the two connecting discs are respectively provided with a plurality of holes, and the holes are symmetrically arranged by the center of the connecting discs;
the plurality of tension springs 5 are hooked with the first connection plate 1 and the second connection plate 2 through the plurality of holes.
Exemplarily, as shown in fig. 1, in one application scenario, the sling damage experimental device is composed of a flexible rope body 3, a first connecting disc 1, an elastic element, a second connecting disc 2 and an eye bolt 7 which are connected in series in sequence, wherein the elastic element is used as a rigidity testing element of the whole sling damage experimental device, the rigidity of the elastic element is lower than that of the rest of the elements, and in the connection form of each piece, the sling body is used as a ring or a hook to be hooked with a hook on the front surface of the first connecting disc 1.
The elastic element adopts a plurality of tension springs 5 in an application scene, the two ends of each tension spring 5 are provided with hooks, and the hooks at the two ends of each tension spring 5 are hooked on the holes of the connecting disc from the back of the connecting disc. The ring of the eye bolt 7 hooks the hook on the front side of the second connecting disc 2.
Fig. 4 shows a connecting disc, wherein the first connecting disc 1 and the second connecting disc 2 are both in the structural form, a hook is fixedly arranged on the front surface of the connecting disc, the hook is positioned in the center of the disc surface, and a plurality of holes are uniformly distributed on the disc surface by using the center of the disc surface.
The sling damage experimental device can be simulated by adopting a mode of removing a spring when the sling damage is simulated. When the undamaged state needs to be recovered, the removed spring only needs to be installed again, and the operation is simple and convenient.
The sling damage experiment device is provided with the elastic element, the elastic element is used as the weakest point of the whole sling damage experiment device, the state of a sling in a bridge model when the sling is damaged can be reflected by replacing, adjusting or reducing the elastic element, the elastic element is hooked with the flexible cable body 3 through the connecting disc, the replacement is very convenient, and the sling damage experiment device can be continuously put into use again after the use is finished, so the experiment process is simple and quick, and the material utilization rate is improved. The elastic element in one embodiment uses a plurality of springs, and the tension of the springs is in a linear relation with the elongation of the springs, so that the experimental data are accurate, and the state of the bridge model when the sling is damaged is easily evaluated.
The center of the hanging ring connection point and the center of the plurality of holes of the connection disc coincide with the center of the connection disc, so that the stress axis of the sling damage experiment device coincides with the connection line of the connection point, and the force measurement is more accurate during damage test.
In one possible implementation, the wire comprises: the flexible cable comprises a flexible cable body 3 and a connecting piece 4, wherein connecting holes are formed in two ends of the connecting piece 4, one end of the connecting piece 4 is hooked with the first connecting disc 1 through the connecting holes, the other end of the connecting piece 4 is hooked with the flexible cable body 3 through the connecting holes, and the rigidity of the connecting piece 4 and the rigidity of the flexible cable body 3 are higher than that of the elastic element.
In one possible implementation, the wire comprises: the rope tension measuring device comprises a flexible rope body 3 and a tension meter, wherein hooks or rings are arranged at two ends of the tension meter for measuring force, one end of the tension meter is hooked with the first connecting disc 1, the other end of the tension meter is hooked with the flexible rope body 3, and the rigidity of the tension meter and the rigidity of the flexible rope body 3 are higher than that of the elastic element.
Illustratively, as shown in fig. 2, the flexible cable comprises a flexible cable body 3 and a connecting disc, the flexible cable body 3 is connected with the connecting disc through a connecting sheet 4, in an application scenario, the surface of the connecting sheet 4 can be used for fixing a strain gauge, and the stress state of the sling cable is reflected through the strain gauge, so that convenience is provided for measuring the force. The connecting piece 4 is usually made of steel.
In another application scenario, the flexible cable is hooked with the connecting disc through the tension meter, and when the elastic element is adjusted and reduced, the stress of the flexible cable can be directly read through the tension meter.
In one possible implementation, the elastic element includes: a cylinder 6 and a breather valve 8;
the cylinder body of the cylinder 6 is hinged or hooked with the first connecting disc 1, and the piston rod of the cylinder 6 is hinged or hooked with the second connecting disc 2;
one port of the breather valve 8 communicates with a first port of the cylinder 6, which is a port of a rodless chamber of the cylinder 6.
In one possible implementation, the elastic element further includes: a barometer 9, said barometer 9 being in communication with said first port.
Illustratively, as shown in fig. 3, another embodiment of the elastic element is to use a cylinder 6, two ends (a cylinder body and a piston rod) of the cylinder 6 are hinged or hooked with the centers of two connecting discs, when the cylinder 6 extracts a certain amount of air, the piston is subjected to the pressure of the atmosphere, so that a pulling force is generated between the cylinder 6 and the piston rod, and the pulling force is influenced by the external air pressure and the vacuum degree in the cylinder 6 and is linearly related to the vacuum degree, that is, the stroke of the piston rod and the pulling force are linearly related, and the rigidity of the cylinder 6 can be adjusted by controlling the position of the piston rod and the total amount of air in the cylinder 6, so that one cylinder 6 can simulate elements with different rigidities by means of vacuum extraction without being disassembled and assembled during experiments.
For example, after the sling damage test device is connected to a bridge model, the air in the cylinder 6 can be pumped out by a vacuum pump to adjust the rigidity of the elastic element. As shown in fig. 5, a vent valve 8 is provided at the air extraction port of the cylinder 6, a vacuum pump is connected to the other end of the vent valve 8, the vent valve 8 is opened, the vacuum pump is started to extract air from the cylinder 6, and when a set value is reached, the vent valve 8 is closed, and the vacuum pump is disconnected.
For the force of the cylinder 6, the degree of vacuum in the cylinder 6 can be detected, and then the area of the piston is calculated. Therefore, in one application scenario, a barometer 9 is provided for obtaining a value of the vacuum degree in the cylinder 6.
According to the sling damage experimental device, the elastic element is the air cylinder 6 with the vent valve 8 arranged at the vent hole, the vacuum pump can be connected through the vent valve 8, the vacuum degree of the air cylinder 6 is adjusted, and the purpose of adjusting the rigidity of the air cylinder 6 is achieved. The rigidity of the cylinder 6 and the stroke of the piston are in a linear relation, so that the measured data are accurate and reliable.
The embodiment of the utility model provides a bridge model which comprises a plurality of sling damage experimental devices, wherein the sling damage experimental devices are used as bearing parts of a bridge deck 11 and are connected with the bridge deck 11.
In one possible implementation, the bridge model includes: arch rib 10, bridge floor 11, two piers 12 and a plurality of as before hoist cable damage experimental apparatus, arch rib 10 is arc, parabola shape or hangs the chain shape, arch rib 10 both ends and 11 both ends of bridge floor respectively with two piers 12 are connected, hoist cable damage experimental apparatus one end with arch rib 10 is connected, the hoist cable damage experimental apparatus other end with bridge floor 11 is connected.
As shown in fig. 6, in a bridge model, the sling damage experiment device is applied, the bridge comprises two piers 12, a bridge deck 11 and an arch rib 10 are erected between the two piers 12, and the arch rib 10 is connected with the bridge deck 11 through a sling. When the bridge floor 11 receives downward external force, this external force passes through hoist cable damage experimental apparatus and transmits to arch rib 10, through the rigidity of adjusting hoist cable elastic element, can simulate the state when the bridge hoist cable received the damage, accomplishes the simulation to the bridge state.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a hoist cable damage experimental apparatus which characterized in that includes:
a flexible cable, two connecting discs, an elastic element and an eye bolt (7);
the two connecting discs comprise a first connecting disc (1) and a second connecting disc (2);
two ends of the elastic element are detachably connected with the back surfaces of the two connecting discs respectively, the flexible cable is hooked with the front surface of the first connecting disc (1), and the ring of the lifting eye bolt (7) is hooked with the front surface of the second connecting disc (2);
wherein the stiffness of the elastic element is lower than the stiffness of the flexible cable, the two connecting discs and the eye bolt (7).
2. The sling damage test device of claim 1, wherein the flexible cable comprises: the flexible cable comprises a flexible cable body (3) and connecting pieces (4), connecting holes are formed in two ends of each connecting piece (4), one end of each connecting piece (4) is connected with the corresponding first connecting disc (1) in a hooked mode through the corresponding connecting hole, the other end of each connecting piece (4) is connected with the corresponding flexible cable body (3) in a hooked mode through the corresponding connecting hole, and the rigidity of each connecting piece (4) and the corresponding flexible cable body (3) is higher than that of each elastic element.
3. The sling damage test device of claim 1, wherein the flexible cable comprises: the tension meter comprises a flexible cable body (3) and a tension meter, wherein hooks or rings are arranged at two ends of the tension meter for measuring force, one end of the tension meter is hooked with the first connecting disc (1), the other end of the tension meter is hooked with the flexible cable body (3), and the rigidity of the tension meter and the flexible cable body (3) is higher than that of the elastic element.
4. The sling damage test device of claim 1, wherein the flexible cable comprises: the flexible cable comprises a flexible cable body (3), the flexible cable body (3) is hooked with the first connecting disc (1), and the rigidity of the flexible cable body (3) is higher than that of the elastic element.
5. The sling damage assay device according to any one of claims 1 to 4, wherein the resilient member comprises: a plurality of tension springs (5);
the two connecting discs are respectively provided with a plurality of holes, and the holes are symmetrically arranged by the center of the connecting discs;
the tension springs (5) are hooked with the first connecting disc (1) and the second connecting disc (2) through the holes.
6. The sling damage assay device according to any one of claims 1 to 4, wherein the resilient member comprises: a cylinder (6) and a breather valve (8);
the cylinder body of the cylinder (6) is hinged or hooked with the first connecting disc (1), and the piston rod of the cylinder (6) is hinged or hooked with the second connecting disc (2);
one port of the ventilation valve (8) is communicated with a first port of the cylinder (6), and the first port is a gas port of a rodless cavity of the cylinder (6).
7. The sling damage assay device of claim 6, wherein the resilient member further comprises: a barometer (9), the barometer (9) in communication with the first port.
8. A bridge module comprising a plurality of cable damage testers as claimed in any one of claims 1 to 7 connected to a deck (11) as a load bearing member of said deck (11).
9. The bridge model of claim 8, wherein the bridge model comprises: the bridge surface damage experiment device comprises an arch rib (10), a bridge surface (11), two piers (12) and a plurality of sling damage experiment devices according to any one of claims 1 to 7, wherein the arch rib (10) is in a circular arc shape, a parabolic shape or a catenary shape, two ends of the arch rib (10) and two ends of the bridge surface (11) are respectively connected with the two piers (12), one end of the sling damage experiment device is connected with the arch rib (10), and the other end of the sling damage experiment device is connected with the bridge surface (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220545146.4U CN216955055U (en) | 2022-03-14 | 2022-03-14 | Sling damage experimental device and bridge model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220545146.4U CN216955055U (en) | 2022-03-14 | 2022-03-14 | Sling damage experimental device and bridge model |
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| Publication Number | Publication Date |
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| CN216955055U true CN216955055U (en) | 2022-07-12 |
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| CN202220545146.4U Expired - Fee Related CN216955055U (en) | 2022-03-14 | 2022-03-14 | Sling damage experimental device and bridge model |
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| Country | Link |
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| CN (1) | CN216955055U (en) |
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2022
- 2022-03-14 CN CN202220545146.4U patent/CN216955055U/en not_active Expired - Fee Related
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Granted publication date: 20220712 |