CN109632220B - Face-face force measuring device for testing collision force of bridge collision test - Google Patents
Face-face force measuring device for testing collision force of bridge collision test Download PDFInfo
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- CN109632220B CN109632220B CN201910027031.9A CN201910027031A CN109632220B CN 109632220 B CN109632220 B CN 109632220B CN 201910027031 A CN201910027031 A CN 201910027031A CN 109632220 B CN109632220 B CN 109632220B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
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- Aviation & Aerospace Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a surface-surface force measuring device for a collision force test of a bridge collision test, which comprises a vibration table, wherein a pier model is arranged on the vibration table, two support base stones are arranged on the pier model, the two support base stones are connected with a beam body model through support supports, stop blocks which correspond to the support base stones one by one are arranged at the bottom of the beam body model, the support base stones are connected with bearing steel plates facing the stop blocks through support rods, strain gauges are arranged on the support rods, and the strain gauges are connected to a data acquisition system. The method can realize the measurement of the transverse collision force of the bridge under different excitation conditions, the collision form is surface-surface collision contact, the method is more consistent with the contact mode of the bridge stop block and the support base cushion stone in the actual collision process, and the transverse collision contact simulation of the bridge stop block and the support base cushion stone is realized, so the result can well represent the actual collision force value of the bridge, and powerful support can be provided for the transverse collision response research of the bridge under the action of an earthquake.
Description
Technical Field
The invention relates to a bridge collision test testing device, in particular to a plane-plane force measuring device for testing collision force of a bridge collision test.
Background
In the current structural collision test, in order to measure the magnitude of the collision force, a collision force measuring device usually adopts a single-point collision mode between structures, namely, an impact end and a receiving end are installed at the position where the structure collides, and the strain of a steel bar or a steel bar behind the impact end is measured to calculate the collision force, or a force sensor directly measures the magnitude of the collision force. Because the collision mode of the actual structure is surface-surface contact, the single-point collision contact utilized by the force measuring elements changes the collision contact mode of the original structure, the structure collision response process is influenced, and the measured single-point collision force cannot represent the actual collision force value of the structure. The main reason for this is that single point impact contacts are easier to implement, while surface-to-surface impact contacts are more difficult to implement. The measured actual collision force value of the structure can provide powerful support for the research of the transverse collision response of the bridge under the action of the earthquake. Therefore, achieving a face-to-face collision of a structure under test is necessary for the study of the response of the structure under load. At present, no plane-plane collision force measuring device exists.
Disclosure of Invention
The invention aims to provide a plane-plane force measuring device for testing the collision force of a bridge collision test, which is used for realizing the real simulation of the plane-plane collision contact between a bridge model stop block and a support base cushion under the action of an earthquake.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a face-face force measuring device of bridge collision test impact test, includes the shaking table, be equipped with the pier model on the shaking table, be equipped with two support base stones on the pier model, two be connected with roof beam body model through the support on the support base stone, the bottom of roof beam body model be equipped with the dog of support base stone one-to-one, the support base stone be connected with through the bracing piece towards the bearing steel sheet of dog, be equipped with the foil gage on the bracing piece, the foil gage is connected to data acquisition system.
Furthermore, the beam body model comprises a beam body weight box and a balancing weight arranged in the beam body weight box.
Furthermore, the support rod is connected with the bearing steel plate in a welding mode.
Furthermore, the support rods are uniformly distributed on the bearing steel plate.
Further, the size of the bearing steel plate is 110mm × 60mm, and the thickness is 15 mm.
Furthermore, the number of the support rods is 6.
During testing, the vibration table is used for applying vibration excitation to the pier model and the beam body model and simulating the action of random loads such as earthquake and the like on the bridge structure, the beam body model transversely moves under the vibration excitation, the stop blocks transversely collide with the bridge support base cushion stones, the stop blocks and the bearing steel plates are used for realizing face-to-face collision, and the data acquisition system is used for acquiring data of the strain gauge through the strain gauge attached to each supporting rod, so that the transverse collision force of the bridge under different excitation conditions is measured, the simulation of the actual face-to-face collision contact mode of the bridge stop blocks and the support base cushion stones is realized, and powerful support can be provided for the research on the response of the bridge structure under the actual collision contact mode.
In the test process, the time course of the collision force is obtained by collecting the strain time course conversion of the support rod, and the conversion formula is as follows:
wherein n is the number of the support rods, E is the elastic modulus of the support rods, AiThe cross-sectional area of a single support rod,i(t) is the average strain time course of a single supporting rod.
The invention has the advantages and positive effects that:
(1) the invention can realize surface-surface collision contact and accords with the contact mode of the bridge stop block and the support in the actual collision process, so the result can well represent the actual collision force value of the bridge;
(2) the invention is proved to be feasible in design through test verification and can accurately measure the impact force of the contact surface;
(3) the invention has simple structure, clear principle and easy operation, and is suitable for large-scale application in the collision test.
Drawings
FIG. 1 is a schematic view of the present invention in an installed position;
FIG. 2 is a top view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a side view of the present invention;
FIG. 5 is a schematic diagram of a bonding position of a strain gauge according to 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.
Referring to fig. 1-5, a face-face force measuring device for a collision force test of a bridge collision test comprises a vibration table 11, a bridge pier model 7 and a beam body model 6, wherein the bridge pier model 7 is fixedly arranged on the vibration table 11, the beam body model 6 is supported and connected on the bridge pier model 7 through two supports 10 fixedly arranged on the bridge pier model 7, the supports 10 are arranged on support base cushion stones 6 at the top of the bridge pier model 7, stop blocks 5 corresponding to the support base cushion stones 4 one by one are arranged at the bottom of the beam body model 6, the support base cushion stones 4 are connected with bearing steel plates 1 facing the stop blocks 9 through support rods 6, strain gauges 3 are arranged on the support rods 2, the strain gauges 3 are connected to a data acquisition system (not shown in the figure), and strain data of the support rods 2 are acquired through the data.
In the test of the invention, the vibration platform 11 is used for applying vibration excitation to the pier model 7 and the beam body model 6, the device is used for simulating the influence of random loads such as earthquake and the like on the bridge foundation, the beam body model 6 moves transversely under the action of vibration excitation, the stop block 9 generates transverse collision on the support cushion stone 4 of the bridge, and the strain gage 3 attached on each support rod 2 is used for measuring the deformation data of the support rod, thereby measuring the transverse collision force of the bridge under different excitation conditions, realizing face-to-face collision by using the stop block 9 and the bearing steel plate 1, being more in line with the contact mode of the bridge stop block and the support in the actual collision process, therefore, the result can well represent the actual collision force value of the bridge, the simulation of the actual surface-surface collision contact mode of the bridge stop block and the support base cushion stone is realized, and powerful support can be provided for the research of the response of the bridge structure in the actual collision contact mode.
In one embodiment, referring to fig. 2 and 4, the support rods 2 are welded to the steel bearing plate 1, and the support rods 2 are uniformly distributed on the steel bearing plate 1, so that the collision force can be uniformly transmitted along each support rod 2.
This embodiment is through probing out a plane size 110mm × 60mm from 4 lateral parts of support base stone, thickness is 15 mm's bearing steel sheet 1, bearing steel sheet 1 is 15mm × 15mm through evenly distributed's root cross-section, length is 30 mm's rod iron is connected with the support, and vertically paste the metal foil gage all around along every rod iron, foil gage 3 is connected to data acquisition unit, utilize data acquisition system to gather the meeting an emergency of the in-process rod iron of bumping, as for data acquisition system's concrete structure, for prior art, no longer describe here.
Wherein n is the number of the steel bars, E is the elastic modulus of the steel bars, AiIs the cross-sectional area of a single steel bar,i(t) is the strain of a single steel bar.
The invention can realize surface-surface collision contact and accords with the contact mode of the bridge stop block and the cushion stone in the actual collision process, so the result can well represent the actual collision force value of the bridge.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (6)
1. A face-face force measuring device for testing the collision force of a bridge collision test comprises a vibration table and is characterized in that: the vibration table is provided with a pier model, the pier model is provided with two support base cushion stones, the two support base cushion stones are connected with a beam body model through support supports, the bottom of the beam body model is provided with a stop block in one-to-one correspondence with the support base cushion stones, the support base cushion stones are connected with bearing steel plates facing the stop blocks through support rods, the support rods are provided with strain gauges, and the strain gauges are connected to a data acquisition system;
the collision force time course calculation formula is as follows:
wherein n is the number of the support rods, E is the elastic modulus of the support rods, AiThe cross-sectional area of a single support rod,i(t) is the average strain time course of a single supporting rod.
2. The face-to-face force measurement device of claim 1, wherein: the beam body model comprises a beam body weight box and a balancing weight arranged in the beam body weight box.
3. The face-to-face force measurement device of claim 1, wherein: the support rod is connected with the bearing steel plate in a welding mode.
4. The face-to-face force measurement device of claim 1, wherein: the supporting rods are uniformly distributed on the bearing steel plate.
5. The surface-to-surface force measuring device of claim 1, wherein the size of said load-bearing steel plate is 110mm × 60mm, and the thickness is 15 mm.
6. The face-to-face force measurement device of claim 1, wherein: the number of the supporting rods is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027031.9A CN109632220B (en) | 2019-01-11 | 2019-01-11 | Face-face force measuring device for testing collision force of bridge collision test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910027031.9A CN109632220B (en) | 2019-01-11 | 2019-01-11 | Face-face force measuring device for testing collision force of bridge collision test |
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| CN109632220A CN109632220A (en) | 2019-04-16 |
| CN109632220B true CN109632220B (en) | 2020-08-04 |
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| CN201910027031.9A Expired - Fee Related CN109632220B (en) | 2019-01-11 | 2019-01-11 | Face-face force measuring device for testing collision force of bridge collision test |
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Citations (5)
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| EP2469225A1 (en) * | 2010-12-24 | 2012-06-27 | Agisco S.r.l. | Automatic measuring system for monitoring the stability of a structure |
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| CN206467555U (en) * | 2017-02-16 | 2017-09-05 | 西南交通大学 | A kind of bridge shock-proof check block device with runback bit function |
| CN107988893A (en) * | 2017-12-06 | 2018-05-04 | 南昌大学 | The anti-fall girder construction of ball buffering energy-absorbing Antivibration block is leaned in a kind of direction across bridge taper |
| CN207582304U (en) * | 2017-11-22 | 2018-07-06 | 任长副 | A kind of bridge anticollision barrier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6166005B1 (en) * | 2017-03-30 | 2017-07-19 | 株式会社シラヤマ | Road bridge cover widening unit |
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2019
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Patent Citations (5)
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|---|---|---|---|---|
| EP2469225A1 (en) * | 2010-12-24 | 2012-06-27 | Agisco S.r.l. | Automatic measuring system for monitoring the stability of a structure |
| CN103940624A (en) * | 2014-05-09 | 2014-07-23 | 中南大学 | Railway vehicle real vehicle bump test system for coupling passenger behavior detection |
| CN206467555U (en) * | 2017-02-16 | 2017-09-05 | 西南交通大学 | A kind of bridge shock-proof check block device with runback bit function |
| CN207582304U (en) * | 2017-11-22 | 2018-07-06 | 任长副 | A kind of bridge anticollision barrier |
| CN107988893A (en) * | 2017-12-06 | 2018-05-04 | 南昌大学 | The anti-fall girder construction of ball buffering energy-absorbing Antivibration block is leaned in a kind of direction across bridge taper |
Non-Patent Citations (4)
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| 地震作用下隔震简支梁桥碰撞反应的振动台试验;李忠献等;《地震工程与工程振动》;20070430;第27卷(第2期);第152-156页正文第1-2节，图1-3 * |
| 考虑轨道约束的高铁简支梁桥横向地震碰撞效应;杨孟刚等;《中南大学学报(自然科学版)》;20180430;第49卷(第4期);第916-924页 * |
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