CN109883815B - A anti-tilt device for monospar loading test - Google Patents
A anti-tilt device for monospar loading test Download PDFInfo
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- CN109883815B CN109883815B CN201910245467.5A CN201910245467A CN109883815B CN 109883815 B CN109883815 B CN 109883815B CN 201910245467 A CN201910245467 A CN 201910245467A CN 109883815 B CN109883815 B CN 109883815B
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000011068 loading method Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 239000000314 lubricant Substances 0.000 claims description 10
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an anti-tilting device for a single-beam loading test, which is characterized in that a truss beam system is established by hinging a tilting main rod, a horizontal main rod and a vertical short rod together, and hinging the lower end of the tilting main rod on a concrete pier anchor through a hinging piece. One end of the inclined main rod is connected with the supporting steel plate through a hinge piece; when the beam body is laterally bent, the whole system bears the lateral force together, and meanwhile, the supported beam body can freely and vertically move, so that the accuracy of the single-beam bearing capacity test result cannot be disturbed. The device has higher use value and spreading value.
Description
Technical Field
The invention relates to the technical field of construction equipment, in particular to an anti-tilting device for a single-beam loading test.
Background
In the construction of a bridge, the beam is used as a main bearing part, the problems of cracks and the like are usually inevitable in the prefabrication process, the bearing capacity of the single beam with the cracks meets the designed bearing capacity, and the bearing capacity test needs to be carried out on the single beam to solve the problems, so that the mechanical property and the quality of the beam meet the current standard requirements.
In the single-beam test, the current loading modes mainly comprise a water tank loading method, a heavy object stacking method and a laboratory loading method. The loading position should be symmetrical on both sides of the midspan section of the beam section. However, in the loading process, the problems of deviation of the loading position or manual operation errors and the like often occur, so that the loads on the two sides in the transverse direction of the beam are asymmetric in the loading process; meanwhile, due to the occurrence of asymmetric load, bending moments of two sides of the beam relative to the beam bottom are unbalanced. The foundation and the two reasons, namely the unbalance of loads and bending moments on two transverse sides of the beam body, enable the beam body to laterally topple, finally cause the failure of a single-beam loading test, and cause economic loss.
Therefore, it is desirable to design an anti-tip and alarm device for single beam loading tests that prevents the beam from damaging during the test.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an anti-tilting device for a single-beam loading test, which solves the problem of beam body tilting in a T-beam loading test.
The invention is realized by the following technical scheme:
an anti-tilting device for a single-beam loading test comprises at least one support truss, wherein the support truss comprises an inclined main rod, a horizontal main rod and a vertical main rod;
the T-shaped beam is horizontally arranged between the two oblique main rods, and the two support steel plates are respectively contacted with the webs on two sides of the beam body;
horizontal mobile jib sets up in the lower part of slant mobile jib, and the both ends of horizontal mobile jib are articulated with two slant mobile jibs respectively, and the length central symmetry of horizontal mobile jib edge is set up to two vertical mobile jibs, and the lower extreme of vertical mobile jib is articulated with horizontal mobile jib, and the upper end of vertical mobile jib is articulated with the middle part of slant mobile jib.
Preferably, a rubber cushion block is arranged on one side of the supporting steel plate, which is in contact with the web plate.
Preferably, a plurality of pressure sensors are arranged in the rubber cushion block and used for detecting the inclined pressure of the beam body.
Preferably, the contact side of the rubber cushion block and the web is coated with a lubricant.
Preferably, a pressure sensor is arranged at each corner and at the center of the rubber cushion block.
Preferably, the lower end of the inclined main rod is hinged with the concrete pier head anchor through an adjusting support steel plate;
and the adjusting support steel plate is provided with a plurality of adjusting bolt holes for adjusting the mounting position of the support steel plate along the transverse adjustment of the beam body.
Preferably, the adjusting bolt holes are strip-shaped holes or elliptical holes, and the length direction of the holes is vertical to the longitudinal direction of the beam body.
Preferably, the both ends of slant mobile jib are articulated with concrete pier head anchor and supporting steel plate through the articulated elements respectively, and the both ends of horizontal mobile jib are articulated with the slant mobile jib through the articulated elements respectively, and the both ends of vertical mobile jib are articulated with slant mobile jib and horizontal mobile jib through the articulated elements respectively.
Preferably, the hinge member includes a fixed joint and a rotating joint;
one end of the fixed joint is fixedly connected with the concrete pier head anchor, the supporting steel plate, the horizontal main rod or the vertical main rod, the other end of the fixed joint is provided with a hinge hole, and the center of the fixed joint is provided with a U-shaped groove;
the one end and slant mobile jib, horizontal mobile jib or vertical mobile jib of rotary joint link firmly, and the other end is provided with the hinge hole, and rotary joint's hinged end joins in marriage in fixed joint's U-shaped groove, and rotary joint and fixed joint are articulated through the pivot.
Preferably, the rotating shaft is further provided with a gasket, the gasket is located between the rotating joint and the fixed joint, and two sides of the gasket are provided with lubricating layers.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides an anti-tilting device for a single-beam loading test, which is characterized in that a truss beam system is established by hinging a tilting main rod, a horizontal main rod and a vertical short rod together and hinging the lower end of the tilting main rod on a concrete pier anchor through a hinging piece. One end of the inclined main rod is connected with the supporting steel plate through a hinge piece; when the beam body is laterally bent, the whole system bears the lateral force together, and meanwhile, the supported beam body can freely and vertically move, so that the accuracy of the single-beam bearing capacity test result is not disturbed.
Furthermore, a rubber cushion block is arranged on the side face of the supporting steel plate, and a pressure sensor is arranged in the rubber cushion block, so that the lateral pressure can be observed in real time, and the loading position can be early warned and adjusted.
Furthermore, the rubber pad is coated with a lubricant, so that the beam body can freely and vertically move in a test, and the influence on the measurement precision is avoided.
Further, the installation position of slant mobile jib can be adjusted through adjusting supporting steel plate, improves the installation effectiveness.
Furthermore, the articulated element has simple structure, convenient processing and low cost.
Further, a lubricant is applied between the rotary joint and the fixed joint to prevent damage caused by direct friction between the joints.
Drawings
FIG. 1 is a schematic structural view of a support truss of the present invention;
FIG. 2 is a schematic view of the hinge of the upper end of the diagonal main rod of the present invention;
FIG. 3 is a schematic illustration of the articulation of the vertical main bar of the present invention;
fig. 4 is a schematic view of the installation of the adjustable support steel plate of the present invention.
The concrete pier comprises an inclined main rod 1, a horizontal main rod 2, a vertical main rod 3, a concrete pier anchor 4, a supporting steel plate 5, an adjusting supporting steel plate 6, a rubber cushion block 7, a pressure sensor 8, a first hinging piece 9, a first rotating joint 9-1, a first fixing joint 9-2, a second hinging piece 10, a second fixing joint 10-1, a second rotating joint 10-2, a double-headed bolt 11, a fastening nut 12, a lubricant 13, a gasket 14, a bolt 15 and a nut 16.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1 and 2, an anti-damage system for a single beam loading test includes two support trusses arranged in parallel to each other, the two support trusses being respectively disposed at both ends of a T-beam; the supporting truss comprises an oblique main rod 1, a horizontal main rod 2 and a vertical main rod 3.
Wherein, two slant mobile jib 1 symmetries set up, and the lower extreme of slant mobile jib 1 is articulated with concrete pier head anchor 4, and the upper end of slant mobile jib 1 is articulated with supporting steel plate 5, and slant mobile jib 1 slope sets up, and supporting steel plate 5 is used for supporting on the web of roof beam, and the plane that two slant mobile jib 1 constitute is triangle-shaped. The T roof beam level sets up between two slant mobile jib 1, and two supporting steel plate 5 contact with two webs of T roof beam both sides respectively.
Horizontal mobile jib 2 sets up in the lower part of slant mobile jib 1, and the both ends of horizontal mobile jib 2 are articulated with the lower part of two slant mobile jibs 1 respectively, and two vertical mobile jibs 3 set up along the length centrosymmetry of horizontal mobile jib 2, and the lower extreme of vertical mobile jib 3 is articulated with horizontal mobile jib 2, and the upper end of vertical mobile jib 3 is articulated with the middle part of slant mobile jib 1.
Be provided with rubber cushion 7 on this supporting steel plate 5 and web's the contact surface, four corners and the center of rubber cushion 7 are provided with pressure sensor 8 respectively for detect the inclined pressure of T roof beam, pressure sensor 8 and upper computer connection, the upper computer is used for reading pressure data. In the test, the lateral pressure can be observed in real time, and the lateral pressure is used for early warning and adjusting the loading position of the T-shaped beam.
One side of the rubber cushion block 7 in contact with the T-shaped beam web is coated with a lubricant, so that the beam body can freely and vertically move in a test, the rubber cushion block 7 does not provide vertical supporting force, and the influence on the measurement precision is avoided.
Referring to fig. 4, the upper end of the inclined main rod 1 is connected with a support steel plate 5 through a first hinge, the lower end of the inclined main rod 1 is connected with an adjusting support steel plate 6 through a first hinge, and the adjusting support steel plate 6 is connected with a concrete pier anchor 4; be provided with a plurality of adjusting bolt hole on adjusting supporting steel plate 6, the adjusting bolt hole is oval bolt hole or bar bolt hole, and the top of concrete pier head anchor 4 has set a plurality of bolt 15, and the adjusting bolt hole of adjusting supporting steel plate 6 is passed to the upper end of bolt 15, is connected concrete pier head anchor 4 with adjusting supporting steel plate 6 through nut 16.
Adjusting the support steel plate 6 and setting up the adjusting bolt hole, finely tune the position of adjusting the support steel plate 6 when being convenient for install, the major axis direction of adjusting the bolt hole is unanimous with the longitudinal direction of experimental roof beam.
The adjusting support steel plate 6 and the support steel plate 5 are the same in size, the longitudinal size of the test beam is 500mm, the vertical size of the test beam is 300mm, and the thickness of the test beam is 20-30 m.
Since the two ends of the oblique main rod are both provided with the first hinge 9, the first hinge 9 at the lower end of the oblique main rod 1 is taken as an example for description.
The first hinge member comprises a first rotary joint 9-1, a first fixed joint 9-2, a stud 11 and a fastening nut 12.
The first fixed joint 9-2 is arranged on the adjusting and supporting steel plate 6, a U-shaped groove is formed in the center of the first fixed joint 9-2, and a hinge hole is formed in the upper end of the first fixed joint 9-2; one end of the first rotating joint 9-1 is fixedly connected to the lower end of the inclined main rod 1, the other end of the first rotating joint 9-1 is located in a U-shaped groove of the first fixed joint 9-2, gaskets 14 are further arranged on two sides of the first rotating joint 9-1 respectively, a stud bolt 11 penetrates through a hinge hole of the first fixed joint 9-2, the gaskets and the first rotating joint 9-1 to hinge the first fixed joint 9-2 and the first rotating joint 9-1, and fastening nuts are arranged at two ends of the stud bolt 11 respectively.
The height of the first rotary joint 9-1 is 200mm, the width is 120mm, the thickness is 120mm, and the radius of the hinge hole is 50 mm.
The height of the first fixed joint 9-2 is 250mm, the width is 200mm, the thickness is 60mm, and the radius of the hinge hole is 50 mm.
The gasket is made of rubber, the thickness of the gasket is 30mm, the radius of the gasket is 100mm, and the two sides of the gasket are coated with lubricating agents, so that damage caused by direct friction between joints is prevented.
The both ends of horizontal mobile jib 2 are articulated with slant mobile jib 1 through second articulated elements 10, and the both ends of vertical mobile jib 3 are articulated with horizontal mobile jib 2 and slant mobile jib 1 through second articulated elements 10 respectively.
Referring to fig. 3, the second hinge member 10 includes a second fixed joint 10-1, a second rotating joint 10-2, a stud 11, and a fastening nut 12.
The second fixed joint 10-1 is a U-shaped connecting plate, coaxial hinge holes are formed in two side plates of the U-shape, the second rotating joint 10-2 can be assembled in a U-shaped groove of the second fixed joint 10-1, the stud bolt 11 sequentially penetrates through the second fixed joint 10-1 and the second rotating joint 10-2 to hinge the second fixed joint 10-1 and the second rotating joint 10-2, and fastening nuts 12 are respectively arranged at two ends of the stud bolt 11.
Two ends of the horizontal main rod 2 and the vertical main rod 3 are respectively provided with a second rotating joint 10-2, and the oblique main rod is provided with two second fixed joints 10-1 which are respectively hinged with the end parts of the horizontal main rod 2 and the vertical main rod 3.
The horizontal main rod 2 is provided with two second fixed joints 10-1 which are respectively hinged with the end parts of the two vertical main rods 3.
The inclined main rod 1 is a hollow circular tube with the outer wall diameter of 100mm and the wall thickness of 8mm, so that enough lateral pressure resisting to the beam is ensured.
The second rotary joint 10-2 has a height of 100mm, a width of 80mm, a thickness of 40mm, and a radius of a hinge hole of 20 mm.
The second fixed joint 10-1 has a height of 120mm, a thickness of 20mm, a width of 80mm, and a radius of a hinge hole of 20 mm.
The second rotary joint 10-2 and the second fixed joint 10-1 are coupled together by a stud 11 and a fastening nut 12, and a lubricant is applied between the second rotary joint 10-2 and the second fixed joint 10-1 to prevent damage due to direct friction between the hinge members.
The longitudinal distance between the two supporting trusses is more than or equal to 700mm, and the distance between the two concrete pier head anchors below the same supporting truss is more than or equal to 500 mm.
The working principle of the damage prevention system for the single-beam loading test provided by the invention is explained in detail below.
During testing, two ends of a T beam are respectively arranged in a support truss, two support steel plates 5 at the upper ends of two inclined main rods 1 are respectively contacted with webs at two sides of the T beam, when the T beam inclines towards the direction of the support steel plates 5, the support steel plates 5 play a supporting role on the T beam, the lateral pressure of the T beam is transmitted to the whole support truss through the support steel plates 5, and due to the triangular structure of the support truss, when the T beam heels, the whole support truss commonly bears the heeling pressure of the T beam, so that the stability of the T beam is improved; meanwhile, the supported T-shaped beam can freely move vertically, so that the accuracy of the test result of the bearing capacity of the T-shaped beam is not disturbed.
When the single beam is inclined or bent laterally, the upper end supporting steel plate generates a force along the transverse direction of the beam to abut against the beam body, and the force can offset the unbalanced bending moment of the beam, so that the problem is solved. In order to enable the provided supporting force to sufficiently offset unbalanced bending moment, a symmetrical truss system is adopted, the advantages of truss members in the aspect of bearing tensile force are fully utilized, the generated transverse supporting force is transmitted to the concrete pier anchors on the same side through the oblique members and the vertical members, meanwhile, due to deformation coordination, the transverse supporting force can be transmitted to the oblique main rods on the symmetrical sides through the vertical members and the horizontal members and then transmitted to the concrete pier anchors connected with the oblique main rods, so that the two sides of the truss bear force jointly, and the limit of the system on the side inclination and the side bending of a beam body is improved.
When the single beam is loaded, in order to reduce the influence of the horizontal supporting force of the supporting truss on the measurement of the bearing capacity of the single beam, the lubricating agent is coated on the supporting steel plate at the upper end, and the vertical deflection of the beam body is not influenced. Meanwhile, the pressure sensor supporting the steel plate at the upper end can test the transverse horizontal force, control the current lateral force of the beam body and adjust the loading position.
Further, a rubber cushion block with a lubricant and a pressure sensor are arranged at a web plate of the test T beam through a supporting steel plate 5, and when the inclined pressure of the T beam is greater than a set value, early warning can be carried out through an upper computer, so that the accuracy of the loading position is ensured. Meanwhile, the system is low in manufacturing cost, recyclable, convenient to transport and assemble and free of great cost increase for the T-beam test.
Furthermore, the system can prevent the damage of the beam in the T beam test and even can perform early warning in the test, and the test result is not affected, so that the system has high use value and popularization value.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. An anti-tilting device for a single-beam loading test is characterized by comprising at least one supporting truss, wherein the supporting truss comprises a tilting main rod (1), a horizontal main rod (2) and a vertical main rod (3);
the concrete bridge structure comprises two oblique main rods (1), a concrete pier anchor (4), supporting steel plates (5), a T beam, a plurality of pressure sensors (8), a plurality of inclined main rods (1), a plurality of T-shaped beams and a plurality of pressure sensors (8), wherein the two oblique main rods (1) are symmetrically arranged, the plane formed by the two oblique main rods is triangular, the lower ends of the oblique main rods (1) are hinged with the concrete pier anchor (4), the upper ends of the oblique main rods (1) are hinged with the supporting steel plates (5), the T beam is horizontally arranged between the two oblique main rods (1), the two supporting steel plates (5) are respectively contacted with webs on two sides of a beam body, one sides, contacted with the webs, of the supporting steel plates (5) are provided with the rubber cushion blocks (7), and the rubber cushion blocks (7) are internally provided with the plurality of pressure sensors (8) for detecting the oblique pressure of the beam body;
when the T-shaped beam inclines towards the direction of the supporting steel plate (5), the supporting steel plate (5) supports the T-shaped beam, the lateral pressure of the T-shaped beam is transmitted to the whole supporting truss through the supporting steel plate (5), and due to the triangular structure of the supporting truss, when the T-shaped beam inclines, the whole supporting truss jointly bears the inclined pressure of the T-shaped beam;
the horizontal main rod (2) is arranged at the lower part of the inclined main rod (1), two ends of the horizontal main rod (2) are respectively hinged with the two inclined main rods (1), the two vertical main rods (3) are symmetrically arranged along the length center of the horizontal main rod (2), the lower end of each vertical main rod (3) is hinged with the horizontal main rod (2), and the upper end of each vertical main rod (3) is hinged with the middle part of the inclined main rod (1);
the lower end of the inclined main rod (1) is hinged with the concrete pier head anchor (4) through an adjusting support steel plate (6); the adjusting support steel plate (6) is provided with a plurality of adjusting bolt holes for adjusting the mounting position of the support steel plate (6) along the transverse adjustment of the beam body, the adjusting bolt holes are strip-shaped holes or elliptical holes, and the length direction of the holes is vertical to the beam body.
2. The anti-tilting device for the mono-beam load test according to claim 1, characterized in that the contact side of the rubber pad (7) and the web is coated with a lubricant (13).
3. The anti-tilting device for the monospar loading test according to claim 1, characterized in that one pressure sensor (8) is provided at each corner and center of the rubber mat (7).
4. The anti-tilting device for the single-beam loading test according to claim 1, wherein two ends of the oblique main rod (1) are respectively hinged with the concrete pier anchor (4) and the supporting steel plate (5) through hinges, two ends of the horizontal main rod (2) are respectively hinged with the oblique main rod (1) through hinges, and two ends of the vertical main rod (3) are respectively hinged with the oblique main rod (1) and the horizontal main rod (2) through hinges.
5. The anti-tilt apparatus for the mono-beam loading test as claimed in claim 4, wherein the hinge comprises a fixed joint and a rotating joint;
one end of the fixed joint is fixedly connected with the concrete pier head anchor (4), the supporting steel plate (5) and the horizontal main rod or the vertical main rod, the other end of the fixed joint is provided with a hinge hole, and the center of the fixed joint is provided with a U-shaped groove;
the one end and slant mobile jib (1), horizontal mobile jib (2) or vertical mobile jib (3) of rotary joint link firmly, and the other end is provided with the hinge hole, and rotary joint's hinged end joins in marriage and adorns in fixed joint's U-shaped groove, and rotary joint and fixed joint are articulated through the pivot.
6. The anti-tilting device for the single-beam loading test is characterized in that a gasket (14) is further arranged on the rotating shaft, the gasket (14) is located between the rotating joint and the fixed joint, and lubricating layers are arranged on two sides of the gasket (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245467.5A CN109883815B (en) | 2019-03-28 | 2019-03-28 | A anti-tilt device for monospar loading test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245467.5A CN109883815B (en) | 2019-03-28 | 2019-03-28 | A anti-tilt device for monospar loading test |
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| Publication Number | Publication Date |
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| CN109883815A CN109883815A (en) | 2019-06-14 |
| CN109883815B true CN109883815B (en) | 2022-06-21 |
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| CN201910245467.5A Expired - Fee Related CN109883815B (en) | 2019-03-28 | 2019-03-28 | A anti-tilt device for monospar loading test |
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| CN113252456B (en) * | 2021-04-12 | 2022-10-04 | 哈尔滨工业大学 | Variable-angle eccentric loading test device for truss structure |
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| CN206920251U (en) * | 2017-07-21 | 2018-01-23 | 西安建筑科技大学 | A kind of structural elements vertical load loading device |
| CN206945286U (en) * | 2017-07-21 | 2018-01-30 | 西安建筑科技大学 | A kind of vertical load loading device suitable for unstability frame structure outside face |
| CN108593275A (en) * | 2018-04-29 | 2018-09-28 | 南京林业大学 | A kind of truss loading device |
| CN108709795A (en) * | 2018-06-27 | 2018-10-26 | 武汉希萌科技有限公司 | A kind of longeron and testing stand for railroad bridge static test |
| CN208637048U (en) * | 2018-04-13 | 2019-03-22 | 遵义师范学院 | A kind of removable structural mechanics experimental stand |
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2019
- 2019-03-28 CN CN201910245467.5A patent/CN109883815B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6047513A (en) * | 1997-01-17 | 2000-04-11 | Gibson; J.W. | Steel construction system |
| CN204575311U (en) * | 2015-04-21 | 2015-08-19 | 中铁十六局集团铁运工程有限公司 | Railway T-beam static test truss |
| CN204612916U (en) * | 2015-05-22 | 2015-09-02 | 扬州大学 | Self-equilibrating truss test unit |
| CN105092222A (en) * | 2015-06-19 | 2015-11-25 | 重庆大学 | Loading apparatus for bearing strength test of girder integral body stability |
| CN106401042A (en) * | 2016-09-12 | 2017-02-15 | 东南大学 | Cable truss structure provided with steel sheet strips |
| CN206920140U (en) * | 2017-07-21 | 2018-01-23 | 西安建筑科技大学 | A kind of equivalent vertical distributed load loading device of frame structure |
| CN206920251U (en) * | 2017-07-21 | 2018-01-23 | 西安建筑科技大学 | A kind of structural elements vertical load loading device |
| CN206945286U (en) * | 2017-07-21 | 2018-01-30 | 西安建筑科技大学 | A kind of vertical load loading device suitable for unstability frame structure outside face |
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| CN109883815A (en) | 2019-06-14 |
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