CN114813307B - Transverse bending resistance test method and test equipment for steel-concrete composite beam connecting key - Google Patents
Transverse bending resistance test method and test equipment for steel-concrete composite beam connecting key Download PDFInfo
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- CN114813307B CN114813307B CN202210245728.5A CN202210245728A CN114813307B CN 114813307 B CN114813307 B CN 114813307B CN 202210245728 A CN202210245728 A CN 202210245728A CN 114813307 B CN114813307 B CN 114813307B
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- 239000004567 concrete Substances 0.000 title claims abstract description 100
- 238000005452 bending Methods 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000010998 test method Methods 0.000 title abstract description 8
- 239000000725 suspension Substances 0.000 claims abstract description 39
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000011065 in-situ storage Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000011178 precast concrete Substances 0.000 claims 1
- 238000012999 compression bending Methods 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of bridge engineering, and particularly relates to a transverse bending resistance test method and test equipment for a steel-concrete composite beam connecting key. The invention achieves the aim of effectively detecting the stretch bending resistance and the compression bending resistance of the connecting key by a method of firstly welding the connecting key, then pouring the concrete plate, then pressing the concrete plate at the end head and finally pressing the concrete plate in the middle. In addition, the test equipment structurally comprises a jack main body, an extension bolt, a fixed ring unit, a U-shaped suspension bracket unit, a support frame unit, a Y-shaped stay cord unit and a radial groove, so that the purposes of stable operation and high efficiency of bending resistance and bending resistance performance detection are achieved.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a transverse bending resistance test method and test equipment for a steel-concrete composite beam connecting key.
Background
The steel-concrete composite beam connecting key is used in the steel-concrete composite beam, namely one end is welded or screwed on steel, and the other end is fixed by concrete pouring. One of the most important performance parameters of the connection is the transverse bending resistance, and after all, there is a small transverse displacement between the steel and the concrete slab, so the connection must be tested for the transverse bending resistance before it is put into use.
In addition, the transverse bending resistance comprises two aspects, namely, the obliquely upward pulling is stretch bending resistance, and the obliquely downward pressing is compression bending resistance, so that the specific test method and device are required to ensure that the actions of obliquely upward pulling and obliquely downward pressing are stable and reliable.
The utility model discloses a Chinese patent with publication number CN214408475U and publication date 2021.10.15, which discloses a bending resistance detection device for a steel-concrete composite beam connecting piece, and the device comprises an equipment body, wherein a hydraulic cylinder which is placed upside down is fixedly arranged at the middle position of the uppermost end of the equipment body, a pressing device is fixedly arranged at the uppermost end of a telescopic rod of the hydraulic cylinder, a controller is fixedly arranged at the upper position of the right side of the equipment body, a slide way is arranged at the middle of the left side and the right side of the upper surface of a workbench of the equipment body, a slide block is arranged in the slide way in a sliding way, and the upper end surface of the slide block is fixedly connected with the lower surface of a movable seat.
However, the detection device in the patent of the utility model has at least the following 3 disadvantages in use.
First, only the bending property of the connecting piece can be tested, and the stretch bending property of the connecting piece cannot be tested.
Secondly, the real service environment of the connecting piece cannot be simulated, the bending action is not caused by the error action between the concrete slab and the steel, and the final bending performance data is unreliable.
Third, the pressure of the pressing action is too high, and before the connecting piece is bent, the connecting piece can be directly pressed through locally, damaged, deformed, and the whole bending performance of the connecting piece is not easy to detect.
Therefore, in view of the above, there is an urgent need for a more realistic, reliable, more stable, and more efficient method and apparatus for testing the transverse bending resistance, which are used for detecting the performance and quality of the connection bond of the steel-concrete composite beam.
Disclosure of Invention
The invention provides a transverse bending resistance test method of a steel-concrete composite beam connecting key, which can achieve the aim of effectively detecting the bending resistance and the compression resistance of the connecting key by a method of firstly welding the connecting key, then pouring a concrete plate, then pressing the concrete plate at the end head and finally pressing the concrete plate in the middle.
In addition, the invention also provides a transverse bending resistance test device for the steel-concrete composite beam connecting key, which structurally comprises a jack main body, an extension bolt, a fixed ring unit, a U-shaped suspension bracket unit, a support frame unit, a Y-shaped stay rope unit and a radial groove, so that the purposes of stable bending resistance and compression bending resistance detection operation and high efficiency are achieved.
The invention adopts the technical proposal that: a transverse bending resistance test method for a steel-concrete composite beam connecting key sequentially comprises the following steps:
s1, welding connection keys on the upper surfaces of two support plates;
s2, pouring concrete plates above the supporting plates, and pouring and fixing all the two groups of connecting keys;
S3, respectively pressing down at two ends of the concrete slab, which are positioned outside the two groups of connecting keys, so as to be used for respectively detecting the tensile bending performance of the two groups of connecting keys;
And S4, performing pressing operation at the position of the concrete slab, which is positioned between the two groups of connecting keys, so as to be used for simultaneously detecting the buckling resistance of the two groups of connecting keys.
The further preferable technical scheme is as follows: the whole concrete slab is prepared by concrete cast-in-place, or comprises three concrete precast slabs and two concrete cast-in-place slabs, and two groups of connecting keys are respectively fixed by the two concrete cast-in-place slabs in a pouring way.
The transverse bending resistance test equipment for the steel-concrete composite beam connecting key comprises an inverted jack main body, an extension bolt arranged on the shaft body of the jack main body, a fixed ring unit sleeved on the extension bolt, a U-shaped suspension bracket unit arranged between two aligned and separated concrete precast slabs and used for filling concrete and preparing a concrete cast-in-situ slab, a support frame unit used for welding the connecting key, and two Y-shaped stay rope units arranged on the fixed ring unit and respectively used for pulling the two U-shaped suspension bracket units to one side.
The further preferable technical scheme is as follows: the U-shaped suspension frame unit comprises a U-shaped plate, two mounting holes and two suspension holes, wherein the two ends of the U-shaped plate are respectively inserted into the concrete precast slabs, the mounting holes are formed in the bottom plate of the U-shaped plate and used for upwards penetrating out of the connecting keys, and the two suspension holes are respectively formed in the two side plates of the U-shaped plate and used for being inserted into the two suspension holes to be clamped and fixed with the Y-shaped stay cord unit.
The further preferable technical scheme is as follows: the U-shaped suspension frame unit further comprises a friction plate which is arranged at the upper side edge position of the inner bottom surface of the U-shaped plate and used for anti-skid fixation on the lower surface of the concrete precast slab in the middle.
The further preferable technical scheme is as follows: the Y-shaped stay cord unit comprises a main rope arranged on the fixed ring unit, two branch ropes with one ends arranged on the main rope, and an arc-shaped block arranged on the branch ropes and used for inner side clamping and fixing after being inserted into the hanging hole.
The further preferable technical scheme is as follows: the Y-shaped stay cord unit further comprises an insertion plate arranged on the inner annular surface of the arc-shaped block, and a radial groove for installing the insertion plate is formed in the annular surface of the circular tail portion of the extension bolt.
The further preferable technical scheme is as follows: the arc blocks are 1/4 circular rings, and the lower surfaces of the four arc blocks are aligned to be the same as the lower surface of the circular tail part of the extension bolt, so that the area of the pressing surface of the jack main body is increased.
The further preferable technical scheme is as follows: the fixed ring unit comprises a ring main body sleeved on the rod part of the extension bolt and an annular rope body groove arranged on the upper surface of the ring main body and used for accommodating the main rope and the branch rope when the arc-shaped block is idle.
The further preferable technical scheme is as follows: the support frame body unit comprises a bottom plate, a support column arranged on the upper surface of the bottom plate, and a support plate arranged on the upper end surface of the support column and the upper surface of the support plate is used for welding a connecting key.
The present invention has the following advantages.
Firstly, the test device constructed by the support plate, the connecting key and the concrete slab is reasonable and effective, the simulated connecting key has high tensile and compression conditions, and the final bending resistance data is more real and reliable.
Secondly, the two ends and the middle of the same concrete slab are sequentially pressed down, so that the stretch-bending resistance and the compression-bending resistance are ensured to be convenient and effective.
And thirdly, the concrete slab comprises three precast slabs and two cast-in-situ slabs, so that the whole structure preparation of the connecting key and the concrete slab is faster and more efficient.
Fourth, test equipment can provide support and mould for cast-in-situ slab before pushing down, guarantees that its operation of pouring is more convenient, simple, stable, safe, and the initiative bending deformation of concrete slab can not be influenced as the U type suspension frame unit of mould yet.
Fifth, when test equipment is used in the pushing down, the Y-shaped stay cord unit can be stably stored, and the Y-shaped stay cord unit and the extension bolt form a larger pushing-down surface together, so that the concrete slab is prevented from being crushed due to overlarge pressure.
Drawings
FIG. 1 is a schematic view of the operation of the connecting key in the present invention in the pressing operation when the bending resistance test is performed.
Fig. 2 is a schematic diagram showing a pressing operation of the connecting key in the bending resistance test according to the present invention.
FIG. 3 is a schematic diagram illustrating the operation of the test apparatus of the present invention in casting concrete cast-in-place slabs.
Fig. 4 is a schematic view showing the position structure of the Y-type rope pulling unit in the present invention.
Fig. 5 is a schematic view showing the operation of the arc-shaped block together with the extension bolt as a pressing surface in the present invention.
Fig. 6 is a schematic structural view of a U-shaped hanger unit according to the present invention.
Fig. 7 is a schematic operation diagram of the present invention, in which the arc-shaped block is clamped and fixed on the suspension hole, so as to suspend the entire U-shaped suspension frame unit.
FIG. 8 is a schematic view of the position structure of the fixing ring unit in the present invention.
In the drawings, the components represented by the respective reference numerals are as follows: the connecting key a, the concrete slab b, the concrete precast slab b1, the concrete cast-in-situ slab b2, the jack main body 11, the extension bolt 12, the fixed ring unit 1, the U-shaped suspension frame unit 2, the support frame body unit 3, the Y-shaped rope pulling unit 4, the U-shaped plate 201, the mounting hole 202, the suspension hole 203, the friction plate 204, the main rope 401, the branch rope 402, the arc-shaped block 403, the inserting plate 404, the radial groove 5, the circular ring main body 101, the annular rope body groove 102, the bottom plate 301, the support column 302 and the support plate 303.
Detailed Description
The following description is of the preferred embodiments of the invention and is not intended to limit the scope of the invention.
As shown in fig. 1-8, a transverse bending resistance test method for a steel-concrete composite beam connecting key sequentially comprises the following steps:
S1, welding a connecting key a on the upper surfaces of two supporting plates 303;
S2, pouring a concrete slab b above the supporting plate 303, and pouring and fixing all the two groups of connecting keys a;
S3, respectively pressing down two ends of the concrete slab b, which are positioned outside the two groups of connecting keys a, so as to be used for respectively detecting the bending resistance of the two groups of connecting keys a;
And S4, performing a pressing operation at a position of the concrete slab b positioned between the two groups of connecting keys a, so as to be used for simultaneously detecting the buckling resistance of the two groups of connecting keys a.
In the prior art, the installation and use environment of the connecting key a is that one end is welded or screwed with steel, and the other end is inserted into concrete. Therefore, in this embodiment, the force of bending the connection key a is transmitted through the concrete slab b, instead of directly arranging a clamping device on the connection key a, so that the final transverse bending resistance data can be ensured to be more convincing, and more real and reliable.
When one end of the concrete slab b is pressed down, the connecting key a far away from one side can be considered to be unaffected, so that the other end needs to be pressed down once again, and when the middle of the concrete slab b is pressed down, the connecting key a on two sides can be considered to be effectively subjected to a compression bending test by matching with the relatively short and proper length of the connecting key a.
In addition, after the stretch bending resistance and compression bending resistance tests are completed on the two groups of one-batch connection keys a, the welding ends of the connection keys a can be relieved, and if the connection keys a cannot meet the continuous test strength of stretch bending and then compression bending, only one of the items can be tested on one batch of connection keys.
Finally, the stretch bending resistance and compression bending resistance data or grades of the connecting key a are measured and analyzed according to the principle specified in the prior art.
The concrete slab b is integrally prepared by concrete cast-in-place, or comprises three concrete precast slabs b1 and two concrete cast-in-place slabs b2, and two groups of connecting keys a are respectively fixed by the two concrete cast-in-place slabs b2 in a pouring way.
In this embodiment, the concrete slab b is preferably a reinforced concrete structure, and may be cast in situ entirely, and if a prefabricated and cast-in-situ mode is adopted, the cast-in-situ end of the concrete precast slab b1 needs a reinforcing steel bar with a length of an extension part, so as to ensure that the cast-in-situ slab can be combined with the precast slab with greater strength.
The transverse bending resistance test equipment for the steel-concrete composite beam connecting key comprises an inverted jack main body 11, an extension bolt 12 arranged on the shaft body of the jack main body 11, a fixed ring unit 1 sleeved on the extension bolt 12, a U-shaped suspension frame unit 2 arranged between two aligned and separated concrete precast slabs b1 and used for filling concrete and preparing a concrete cast-in-situ slab b2, a support frame body unit 3 used for welding a connecting key a, and two Y-shaped pull rope units 4 arranged on the fixed ring unit 1 and used for pulling the two U-shaped suspension frame units 2.
In this embodiment, the test apparatus adopts a test mode of three concrete precast slabs b1 and two concrete cast-in-situ slabs b2, and the general use method and advantages thereof are as follows.
The first support frame body unit 3 is welded or screwed with a connecting key a on the upper surface, the U-shaped suspension frame unit 2 is provided with a hole, and the connecting key a is inserted and temporarily placed on the support frame body unit 3.
The second, the said Y-shaped rope pulling unit 4 passes through the said U-shaped suspension frame unit 2, suspend it, then three concrete precast slabs b1 altogether, one of them locates between two said U-shaped suspension frame units 2, two other ones locate outside two concrete precast slabs b1 separately, the end of three concrete precast slabs b1 inserts the depth about 20% of its own length in the said U-shaped suspension frame unit 2, finally three concrete precast slabs b1 plus two said U-shaped suspension frame units 2, fix in the air about 5cm above the upper surface of the said support frame body unit 3.
Thirdly, adding concrete into the two U-shaped suspension frame units 2, and still maintaining until the concrete is solidified to form a concrete cast-in-situ slab b2, wherein the U-shaped suspension frame units 2 are left on the concrete cast-in-situ slab b2 at the moment or are taken down after being crushed, and the test operation is not affected.
Fourth, the jack main body 11 follows its own sliding base, and stays and presses down at the end and middle of the concrete slab b, so as to complete the whole bending and bending resistance test operation, and obtain the required transverse bending resistance data.
Fifth, the welding part at the lower end of the connecting key a is relieved, the connecting key a and the concrete slab b are taken down entirely, and materials such as concrete blocks or reinforcing steel bars can be recycled after the whole connecting key a and the concrete slab b are crushed, so that the complete test of the transverse bending resistance of the connecting key is finished entirely.
The connecting key a comprises a bolt, a steel bar, a steel rod, angle steel and the like.
The U-shaped suspension frame unit 2 comprises a U-shaped plate 201 with two ends respectively inserted into the concrete precast slab b1, a mounting hole 202 arranged on the bottom plate of the U-shaped plate 201 and used for upwards penetrating out the connecting key a, and two suspension holes 203 respectively arranged on two side plates of the U-shaped plate 201 and used for being inserted and then clamped and fixed with the Y-shaped pull rope unit 4.
In this embodiment, the material of the U-shaped board 201 is common rubber or plastic, the mounting hole 202 is a circular hole, and a small amount of material may leak from the circular hole, so that the molding of the concrete cast-in-situ board b2 is not affected.
The hanging hole 203 is circular or square in shape, and ensures that the engagement portion of the Y-shaped rope unit 4 is engaged, but has an engagement angle, so that the U-shaped plate 201 can be hung and unhooked.
The U-shaped suspension frame unit 2 further comprises a friction plate 204 which is arranged at the upper side edge position of the inner bottom surface of the U-shaped plate 201 and is used for carrying out anti-skid fixation on the lower surface of the concrete precast slab b1 in the middle.
In this embodiment, when the U-shaped board 201 is suspended and pulled by the Y-shaped rope pulling unit 4, the pulling force is oblique, wherein the vertical component force is a force, and the whole concrete slab b can be suspended and pulled, but the horizontal component force is a harmful force, so that the U-shaped board 201 slides on the upper surface of the concrete precast slab b1, and therefore, the friction plate 204 made of a common soft rubber material is provided, so that the U-shaped board 201 stably spans across the two concrete precast slabs b1.
Of course, the jack body 11 and the extension bolt 12 cannot only jack downwards, but also cannot be pulled downwards, so that the jack body 11 is set as a screw thread rotary jacking device, and the weight of the whole concrete slab b can be stably suspended at the extension bolt 12.
The Y-shaped rope pulling unit 4 includes a main rope 401 provided on the fixing ring unit 1, two branch ropes 402 having one ends provided on the main rope 401, and an arc-shaped block 403 provided on the branch ropes 402 and engaged and fixed inside after being inserted into the suspension hole 203.
In this embodiment, the Y-shaped rope pulling unit 4 has two use states, that is, the post-releasing suspension is needed before the concrete cast-in-situ slab b2 is cast until the concrete cast-in-situ slab b2 is completely cured, and after the concrete cast-in-situ slab b2 is cured, the Y-shaped rope pulling unit can be retracted upwards to enter an idle state.
The radial overall dimension of the arc-shaped block 403 is smaller than the opening dimension of the suspension hole 203, so that the arc-shaped block 403 can be inserted into the suspension hole 203 in the chord direction, and cannot be pulled out from the suspension hole 203 in the radial direction, so that the suspension and the suspension can be stabilized.
Finally, the two main ropes 401 are symmetrical on the fixed ring unit 1, and the two branch ropes 402 are also symmetrical on the main ropes 401, so that the whole suspension structure is ensured to be more stable.
The Y-shaped rope pulling unit 4 further comprises an inserting plate 404 arranged on the inner annular surface of the arc-shaped block 403, and a radial groove 5 for installing the inserting plate 404 is arranged on the annular surface of the circular tail part of the extension bolt 12. The arc blocks 403 are 1/4 of a circular ring, and the lower surfaces of the four arc blocks 403 are aligned to be flush with the lower surface of the circular tail of the extension bolt 12, so as to increase the area of the pressing surface of the jack main body 11.
In this embodiment, if the circular tail of the extension bolt 12 has a relatively small area, so that if the concrete slab b is directly pressed down, there may be a problem that the concrete is not pressed down enough, so that when the arc blocks 403 are idle, four arc blocks 403 are formed into a complete circular ring, and by means of the insertion plate 404, the radial slot 5 is inserted together with the circular tail of the extension bolt 12 to form a coplanar larger circular supporting surface, so as to ensure sufficient pressure strength, and a relatively small pressure is required for the bending test, rather than the pressure value.
The circular tail of the extension bolt 12 is in a rotation mode that the circular surface is provided with a cross pattern instead of an outer hexagon, so that the four arc blocks 403 can be perfectly spliced into a larger circle.
The fixed ring unit 1 comprises a circular ring main body 101 sleeved on the rod part of the extension bolt 12, and a ring-shaped rope body groove 102 which is arranged on the upper surface of the circular ring main body 101 and is used for accommodating the main rope 401 and the branch rope 402 when the arc-shaped block 403 is idle.
In this embodiment, after the concrete slab b is cured and the pressing operation is performed, the arc-shaped block 403 is mounted on the extension bolt 12, and the main rope 401 and the branch rope 402 are idle and drop, so that the annular rope body groove 102 is provided to receive the ropes for the next application of the connecting key a.
The support body unit 3 includes a base plate 301, a support column 302 provided on an upper surface of the base plate 301, and a support plate 303 provided on an upper end surface of the support column 302 and having an upper surface for welding a connection key a.
In this embodiment, the whole material of the supporting frame unit 3 is steel, and the upper surface of the supporting plate 303 is used for welding the connection key a, or is provided with an internal thread ring for screwing the connection key a.
Finally, the number of the supporting frame units 3 is two, and a single supporting plate 303 can be provided with a plurality of rows and columns of connection keys a at a time.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. These are all non-inventive modifications which are intended to be protected by the patent laws within the scope of the appended claims.
Claims (6)
1. The utility model provides a transverse bending resistance test equipment of steel and concrete composite beam attach key, includes the jack main part (11) of inversion to and set up extension bolt (12) on jack main part (11) axis body, its characterized in that: the device also comprises a fixed ring unit (1) sleeved on the extension bolt (12), a U-shaped suspension bracket unit (2) arranged between every two aligned and separated concrete precast slabs (b 1) and used for filling concrete and manufacturing a concrete cast-in-situ slab (b 2), a support frame body unit (3) used for welding a connecting key (a), and two Y-shaped stay rope units (4) arranged on the fixed ring unit (1) and respectively used for pulling the two U-shaped suspension bracket units (2),
The U-shaped suspension frame unit (2) comprises a U-shaped plate (201) with two ends respectively inserted into the precast concrete slab (b 1), a mounting hole (202) arranged on the bottom plate of the U-shaped plate (201) and used for upwards penetrating out of the connecting key (a), and two suspension holes (203) respectively arranged on the two side plates of the U-shaped plate (201) and used for clamping and fixing the Y-shaped rope pulling unit (4) after being inserted,
The U-shaped suspension frame unit (2) further comprises a friction plate (204) which is arranged at the upper side edge position of the inner bottom surface of the U-shaped plate (201) and used for anti-skid fixation on the lower surface of the concrete precast slab (b 1) in the middle.
2. The transverse bending resistance test device for the steel-concrete composite beam connecting key according to claim 1, wherein the transverse bending resistance test device is characterized in that: the Y-shaped rope pulling unit (4) comprises a main rope (401) arranged on the fixed ring unit (1), two branch ropes (402) with one ends arranged on the main rope (401), and an arc-shaped block (403) arranged on the branch ropes (402) and used for inner side clamping and fixing after being inserted into the hanging hole (203).
3. The transverse bending resistance test device for the steel-concrete composite beam connecting key according to claim 2, wherein the transverse bending resistance test device is characterized in that: the Y-shaped stay cord unit (4) further comprises an insertion plate (404) arranged on the inner annular surface of the arc-shaped block (403), and a radial groove (5) for installing the insertion plate (404) is formed in the annular surface of the circular tail part of the extension bolt (12).
4. A transverse bending resistance test device for a steel-concrete composite beam connecting key according to claim 3, wherein: the arc blocks (403) are 1/4 circular rings, and the lower surfaces of the four arc blocks (403) are aligned to be the same level with the lower surfaces of the circular tail parts of the extension bolts (12), so that the area of the pressing surface of the jack main body (11) is increased.
5. The transverse bending resistance test device for the steel-concrete composite beam connecting key according to claim 2, wherein the transverse bending resistance test device is characterized in that: the fixed ring unit (1) comprises a ring body (101) sleeved on the rod part of the extension bolt (12), and an annular rope body groove (102) which is arranged on the upper surface of the ring body (101) and is used for accommodating the main rope (401) and the branch rope (402) when the arc-shaped block (403) is idle.
6. The transverse bending resistance test device for the steel-concrete composite beam connecting key according to claim 1, wherein the transverse bending resistance test device is characterized in that: the support frame body unit (3) comprises a bottom plate (301), a support column (302) arranged on the upper surface of the bottom plate (301), and a support plate (303) arranged on the upper end surface of the support column (302) and the upper surface of the support plate is used for welding a connecting key (a).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245728.5A CN114813307B (en) | 2022-03-14 | 2022-03-14 | Transverse bending resistance test method and test equipment for steel-concrete composite beam connecting key |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210245728.5A CN114813307B (en) | 2022-03-14 | 2022-03-14 | Transverse bending resistance test method and test equipment for steel-concrete composite beam connecting key |
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| CN114813307A CN114813307A (en) | 2022-07-29 |
| CN114813307B true CN114813307B (en) | 2024-10-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458220A (en) * | 2019-01-18 | 2020-07-28 | 台州学院 | Method for testing transverse bending resistance of small hinge joint hollow slab bridge combined reinforcing member |
| CN217359415U (en) * | 2022-03-14 | 2022-09-02 | 厦门百城建设投资有限公司 | Transverse bending resistance test device for steel-concrete composite beam connecting key |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019011995A (en) * | 2017-06-29 | 2019-01-24 | 公益財団法人鉄道総合技術研究所 | Rigidity measuring device, rigidity measuring method, and program |
| CN108613879A (en) * | 2018-04-20 | 2018-10-02 | 南京林业大学 | It is bolted wood-light aggregate concrete combination beam and method for testing performance and device |
| CN212932220U (en) * | 2020-07-31 | 2021-04-09 | 福州大学 | Draw anchor formula railing horizontal thrust detection device |
| CN214408475U (en) * | 2021-02-20 | 2021-10-15 | 中国铁路通信信号上海工程局集团有限公司 | Bending resistance detection device for steel-concrete composite beam connecting piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111458220A (en) * | 2019-01-18 | 2020-07-28 | 台州学院 | Method for testing transverse bending resistance of small hinge joint hollow slab bridge combined reinforcing member |
| CN217359415U (en) * | 2022-03-14 | 2022-09-02 | 厦门百城建设投资有限公司 | Transverse bending resistance test device for steel-concrete composite beam connecting key |
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