CN117433822B - Structural performance evaluation system and method using reinforced concrete bracket as support - Google Patents
Structural performance evaluation system and method using reinforced concrete bracket as support Download PDFInfo
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- CN117433822B CN117433822B CN202311759095.0A CN202311759095A CN117433822B CN 117433822 B CN117433822 B CN 117433822B CN 202311759095 A CN202311759095 A CN 202311759095A CN 117433822 B CN117433822 B CN 117433822B
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- rotating plate
- pier
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000011156 evaluation Methods 0.000 title claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 23
- 239000004567 concrete Substances 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000006698 induction Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims 1
- 230000001976 improved effect Effects 0.000 abstract description 4
- 238000009662 stress testing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge stress testing, in particular to a structural performance evaluation system and method using reinforced concrete brackets as support, wherein the system comprises the following components: a base; the retaining wall is vertically fixed on the base, and a driving piece is fixed on the retaining wall; the sliding seat is arranged on the base and can be arranged in a sliding manner relatively in a direction towards or away from the retaining wall; one end of the rotating plate body is rotationally connected with the sliding seat, the rotating plate body is provided with a pier pouring die which is vertical to the rotating plate body, and a bracket pouring die is detachably arranged on one side, facing the retaining wall, of the pier pouring die; wherein, pier pouring mould rotates the top butt that the bracket supported behind 90 degrees on the barricade inner wall at the rotation plate body, rotates the plate body and is connected with the driving piece, has the force transducer of being connected with the treater on the bracket support reinforcing bar for monitor bracket support receives the atress condition in the extrusion process. Through the arrangement, the safety and reliability of bracket support assessment are improved.
Description
Technical Field
The invention relates to the technical field of bridge stress testing, in particular to a system and a method for evaluating structural performance of a reinforced concrete bracket serving as a bracket support.
Background
In the building field, bracket supports are also called beam brackets, and are generally fixed on side walls of a spandrel girder to provide vertical supporting force; however, the bracket support needs to transmit the load from the hanging beam, which affects the stress of the bridge structure, and in order to ensure the structural reliability of the bracket, performance evaluation is needed to be carried out on the bracket support.
In the related art, as disclosed in chinese patent application publication No. CN108168758A, in 2018, 6 and 15, a device and a method for measuring bracket pressure of a steel platform are disclosed, wherein a C-shaped clamp structure is formed by a flexible base, a vertical support rod, a top cross rod and a pressure sensor, and is fixed on a bracket support, when a specific test is performed, the bracket is loaded with pressure downwards by a jack, then the pressure is unloaded step by step, and when the variance value of the bracket pressure is not greater than a predetermined allowable value, the subsequent construction is performed.
However, the inventor finds that the structural form is only suitable for bracket structures with rectangular cross sections, and for bracket supporting structures at the tops of piers, the C-shaped clamp structures cannot be fixed due to the inclined surfaces at the bottoms, and the bracket is high in height, so that potential safety hazards exist in high-altitude operation.
Disclosure of Invention
In view of at least one of the above technical problems, the present invention provides a system and a method for evaluating structural performance of a reinforced concrete bracket as a bracket support, and an improvement of a test structure and a method is adopted to improve stability and safety of a test.
According to a first aspect of the present invention, there is provided a structural performance assessment system for a reinforced concrete bracket as a bracket support, comprising:
a base;
the retaining wall is vertically fixed on the base, and a driving piece is fixed on the retaining wall;
the sliding seat is arranged on the base and can be arranged in a relatively sliding manner in a direction towards or away from the retaining wall;
one end of the rotating plate body is rotationally connected with the sliding seat, a pier pouring die perpendicular to the rotating plate body is arranged at the position, far away from the sliding seat, of the rotating plate body, concrete for pouring tests is used in the pier pouring die, and a bracket pouring die is detachably arranged on one side, facing the retaining wall, of the pier pouring die and used for forming bracket supports;
the bridge pier pouring die is lapped on the retaining wall after the rotating plate body rotates by 90 degrees, the top of a bracket support formed on the bracket pouring die is abutted to the inner wall of the retaining wall, the rotating plate body is provided with a connecting part connected with the driving piece, the bracket support or an inner reinforcing steel bar is provided with a force sensor, and the force sensor is connected with the processor and used for monitoring the stress condition of the bracket support in the extrusion process.
In some embodiments of the present invention, the pier casting mold is cylindrical and is detachably fixed to the rotating plate.
In some embodiments of the present invention, a side of the pier casting mold facing the bracket casting mold has an open window for insertion of reinforcing bars in bracket supports.
In some embodiments of the present invention, a plurality of parallel guide rails are further fixed on the base, an extending direction of the guide rails is perpendicular to a plane where the retaining wall is located, the sliding seats are slidably disposed on the guide rails, and the number of the sliding seats is adapted to the number of the guide rails.
In some embodiments of the invention, the guide rail extends to the edge of the base, and the bottom of the rotating plate body is provided with a reinforcing rib, and the height of the reinforcing rib is matched with the height of the guide rail.
In some embodiments of the present invention, the driving member is a hydraulic cylinder, the rotating plate body is provided with a window corresponding to a piston rod of the hydraulic cylinder, the connecting part is a connecting frame with an area larger than that of the window, and the connecting frame is connected after the rotating plate body rotates 90 degrees.
In some embodiments of the present invention, a connecting arm is rotatably connected to the sliding seat, and the connecting arm is detachably connected to the rotating plate body.
In some embodiments of the present invention, a positioning plate is further fixed on the sliding seat, the positioning plate is L-shaped, one side of the positioning plate is fixed on the sliding seat, the other side of the positioning plate is parallel to the retaining wall, and a connecting hole is further formed on one side parallel to the retaining wall, for connecting with the rotating plate body.
In some embodiments of the present invention, the retaining wall further has guard plates on both sides in the width direction, and the guard plates at least cover an area between the rotating plate body and the retaining wall after being turned over.
According to a second aspect of the present invention, there is also provided a structural performance assessment method of a reinforced concrete bracket as a bracket support, applied to the structural performance assessment system of a reinforced concrete bracket as a bracket support according to any one of the first aspect, comprising the steps of:
pouring concrete for the test in a pier pouring mould, inserting bracket steel bars into the pier concrete, and attaching stress induction pieces to the bracket steel bars;
installing a bracket pouring die, performing concrete pouring molding of bracket support, and removing the bracket pouring die after the bracket support is molded;
lifting the rotating plate body by using a lifting tool, so that the rotating plate body rotates 90 degrees towards the direction of the retaining wall and is lapped on the retaining wall;
the position of the sliding seat is adjusted, so that the bracket is supported against the inner side of the retaining wall;
connecting the driving end of the driving piece with the rotating plate body, and connecting the stress sensing piece with the processor;
and controlling the driving piece to pull the rotating plate body towards the retaining wall direction, recording force application data and stress data, and verifying whether the stress value under the set pressure meets the design requirement.
The beneficial effects of the invention are as follows: according to the invention, through the arrangement of the rotating plate body, the pier pouring mould poured and formed on the rotating plate body is lapped on the retaining wall after rotating, a stable test system is formed by means of self weight, then the bracket can be supported and abutted on the retaining wall by means of the movement of the sliding seat which is fixed relative to the retaining wall and can slide by driving of the driving piece, and the stress condition on the bracket is detected by the force sensor on the bracket support.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 is a schematic diagram showing a connection structure between a reinforced concrete bracket support and a pier according to an embodiment of the present invention
FIG. 2 is a schematic diagram of a system for evaluating structural performance of a reinforced concrete bracket as a support in an embodiment of the present invention;
fig. 3 is a schematic diagram of a disassembly and assembly structure of a bracket casting mold in an embodiment of the invention;
FIG. 4 is a front view of a structural performance assessment system with reinforced concrete brackets as a support in an embodiment of the present invention;
FIG. 5 is a front view of a reinforced concrete bracket as a support in a structural performance assessment system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a connection structure between a rotating plate and a sliding seat according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of the turnover plate body after being turned over in the embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a connection structure between a driving member and a turnover plate according to an embodiment of the present invention;
FIG. 9 is a schematic view of a sliding seat according to an embodiment of the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 2 according to an embodiment of the present invention;
FIG. 11 is an enlarged view of a portion of the portion B of FIG. 7 in accordance with an embodiment of the present invention;
FIG. 12 is a schematic view of an installation structure of a guard plate according to an embodiment of the present invention;
fig. 13 is a flowchart illustrating steps of a method for evaluating the performance of a structure using a reinforced concrete bracket as a bracket support according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the embodiment of the invention, as shown in fig. 1, the principle of performance evaluation adopted by the bracket support 02 is that the stress of the bracket support 02 in an actual building is simulated by applying force in the direction shown by an arrow in fig. 1, and whether the performance of the bracket support 02 meets the standard is obtained through stress test of the bracket support 02, but in order to avoid overhead operation and improve the reliability of the test, in the embodiment of the invention, the pier is turned to a horizontal state to apply transverse force, and the height of the pier in the test only needs to be locally poured, namely, a local pier 01, and the bracket support 02 can be the same as the actual bracket structure, so that the reliability of the test result is improved.
The structural performance evaluation system using the reinforced concrete bracket as the bracket support shown in fig. 2 to 12 comprises a base 1, a retaining wall 2, a sliding seat 4 and a rotating plate body 5, wherein the base 1 is fixed on a horizontal plane as shown in fig. 2, and in some embodiments of the invention, the base 1 can be realized by a manner of foundation casting and concrete casting, and can also be reliably connected with the ground by adopting a steel plate; the retaining wall 2 is vertically fixed on the base 1, and a driving piece 3 is fixed on the retaining wall 2; in the embodiments of the present invention, the retaining wall 2 serves to block the bracket support 02 during testing on the one hand, and also serves to support the pier portion so that the pier and bracket support 02 form a stable system by virtue of their own weight, and the retaining wall 2 is also used for mounting the driving member 3, although it should be noted here that in some embodiments of the present invention, the driving member 3 has various structures, such as a hydraulic cylinder, which is connected to a hydraulic station during specific operation, and also facilitates the arrangement of the hydraulic station by fixing the driving member 3 to the retaining wall 2; referring to fig. 2, in the embodiment of the present invention, the sliding seat 4 is disposed on the base 1 and can be relatively slidably disposed in a direction toward or away from the retaining wall 2; the sliding arrangement of the sliding seat 4 has various structural forms, for example, the sliding arrangement can be in the form of sliding friction, a mirror surface stainless steel plate can be arranged on the base 1 to reduce friction force, and the guiding and friction force reducing effects can be further realized by arranging a sliding rail; one end of the rotating plate body 5 is rotationally connected with the sliding seat 4, one end of the rotating plate body 5 far away from the sliding seat 4 is provided with a pier pouring die 6 perpendicular to the rotating plate body 5, concrete for pouring tests is used in the pier pouring die, and a bracket pouring die 7 is detachably arranged on one side, facing the retaining wall 2, of the pier pouring die 6 and used for forming bracket supports 02; as shown in fig. 3, the bracket casting mold 7 is detachably connected with the pier casting mold 6, and specific connection forms are various, and can be connected through bolts or temporarily fixed by adopting a bracket, and the bracket casting mold 7 can be detached, so that the bracket support 02 can be conveniently formed, and meanwhile, the bracket casting mold 7 is taken down when a test is specifically performed, so that more real test data can be obtained.
When the test is specifically performed, as shown in fig. 4 and 5, after the rotating plate body 5 rotates 90 degrees, the pier pouring mold 6 is lapped on the retaining wall 2, the top of the bracket support 02 formed on the bracket pouring mold 7 is abutted on the inner wall of the retaining wall 2, the rotating plate body 5 is provided with a connecting part 51 connected with the driving piece 3, and the reinforcing steel bar on or in the bracket support 02 is provided with a force sensor (not shown in the figure), and the force sensor is connected with the processor and used for monitoring the stress condition of the bracket support 02 in the extrusion process. It should be noted here, of course, that in some embodiments of the present invention, the force sensor may be a pressure sensor or a stress sensor 02a, and those skilled in the art may make specific settings as needed.
When the embodiment of the invention is specifically implemented, the step flow shown in fig. 13 is adopted, which comprises the following steps:
s10: pouring concrete for the test in a pier pouring mould 6, inserting bracket steel bars into the pier concrete, and attaching stress induction pieces to the bracket steel bars; the bracket steel bar is the steel bar bound by the bracket support 02 before pouring, and the binding form of the bracket steel bar is the same as the structure form adopted in actual pouring, in the embodiment of the invention, the force sensor adopts stress induction pieces, and a plurality of stress induction pieces are respectively arranged at the bottom, the middle and the top of the bracket support 02 so as to acquire more comprehensive data;
s20: installing a bracket pouring die 7, performing concrete pouring molding of the bracket support 02, and removing the bracket pouring die 7 after the bracket support 02 is molded; as shown in fig. 3, the top of the bracket casting mold 7 can be rotatably connected by a hinge, so that the installation of the mold and the casting of concrete are facilitated.
S30: lifting the rotating plate body 5 by using a lifting tool, so that the rotating plate body 5 rotates 90 degrees towards the direction of the retaining wall 2 and is lapped on the retaining wall 2; as shown in fig. 5, the bridge pier casting mold 6 mounted on the retaining wall 2 and the slide seat 4 at the bottom form slidable portions, and when the rotating plate body 5 is subsequently biased, the force can be transmitted to the bracket support 02 for abutment.
S40: adjusting the position of the sliding seat 4 so that the bracket support 02 abuts against the inner side of the retaining wall 2; here, the bracket support 02 abuts against the inner side of the retaining wall 2 as shown in fig. 5, and this structural form is to simulate the stress of the bracket support 02 when the girder is overlapped on the bridge.
S50: the driving end of the driving piece 3 is connected with the rotating plate body 5, and the stress sensing piece is connected with the processor; as for the connection between the driving member 3 and the rotation plate body 5, that is, the connection portion 51, the specific connection manner of the connection portion 51 is various, for example, the connection may be performed by using a bolt, the connection may be performed by using a hook or the connection may be performed by using a wire rope, etc., and a person skilled in the art may select a specific connection portion structure as required.
S60: the driving part 3 is controlled to pull the rotating plate body 5 towards the retaining wall 2, force application data and stress data are recorded, and whether the stress value under the set pressure meets the design requirement is verified.
In the above embodiment, through the setting of rotating plate body 5 for pour the pier pouring mould 6 of shaping on rotating plate body 5 overlap joint on barricade 2 after rotating, rely on self weight to form stable test system, the removal of the slidable sliding seat 4 of being fixed in relative barricade 2 is driven by means of driving piece 3 again, can support 02 with the bracket and support 02 on the barricade 2, the atress condition on the bracket is detected to the force transducer on the bracket support 02 of rethread, compared with prior art, this kind of structural style not only can measure near true atress condition, need not the operation of ascending a height moreover, the security and the reliability of test have been improved.
On the basis of the above embodiment, referring to fig. 6, the pier casting mold 6 is cylindrical and is detachably fixed to the rotating plate 5. It should be noted that, in some embodiments of the present invention, the bridge pier casting mold 6 may be fixed by a metal structure, for example, a steel plate is used to implement the arrangement of the structure, so that on one hand, the reliability of the local structure of the bridge pier can be ensured, and on the other hand, the bridge pier casting mold is also convenient to dismantle the part by detachable arrangement, and the concrete after the evaluation can be removed only by lifting the bridge pier concrete mold; it should be noted here that the bridge pier casting mold 6 may be spliced by, for example, fastening bolts, so that multiple uses can be achieved. Further, in some embodiments of the present invention, referring to fig. 3, the side of the pier casting mold 6 facing the bracket casting mold 7 has an opening window 6a for insertion of the reinforcing bars in the bracket support 02. It should be noted here that, by setting the insertion timing of the reinforcing bars so as to be convenient for adjusting the angle and depth of insertion of the reinforcing bars and also for arranging the stress-inducing pieces before the concrete in the pier casting mold 6 is not cured.
Referring to fig. 6, in some embodiments of the present invention, a plurality of parallel guide rails 8 are further fixed on the base 1, the extending direction of the guide rails 8 is perpendicular to the plane of the retaining wall 2, the sliding seats 4 are slidably disposed on the guide rails 8, and the number of the sliding seats 4 is adapted to the number of the guide rails 8. Through the arrangement of the guide rail 8, a guiding function can be provided for the sliding seat 4 to drive the rotating plate body 5 to move, and the friction force in the test process can be reduced; it should be noted that, of course, in order to further reduce the friction, those skilled in the art may also provide a roller or other friction-reducing structure on the top of the retaining wall 2.
In order to further strengthen the support of the rotating plate body 5, the guide rail 8 extends to the edge of the base 1, and the bottom of the rotating plate body 5 is provided with a reinforcing rib 52, and the height of the reinforcing rib 52 is adapted to the height of the guide rail 8. It should be noted that in some embodiments of the present invention, the reinforcing ribs 52 may be provided on the upper surface of the rotating plate body 5 and the retaining wall 2 as shown in fig. 2 to ensure structural performance, and in the embodiment of the present invention, the reinforcing ribs 52 provided at the bottom of the rotating plate body 5 may also play a role in protecting the guide rail 8, and the influence of gravity on the guide rail 8 after concrete is poured.
Referring to fig. 7 and 8, in some embodiments of the present invention, the driving member 3 is a hydraulic cylinder, the rotating plate 5 has a window 51a corresponding to a piston rod of the hydraulic cylinder, the connecting portion 51 is a connecting frame with an area larger than the window 51a, and the connecting frame is connected after the rotating plate 5 rotates 90 degrees. In the embodiment of the invention, the connection of the connecting frame and the piston rod can be realized by adopting a fastener such as a bolt; it should be noted that, in the embodiment of the present invention, the connection frame is connected after the rotating plate body 5 is lapped on the retaining wall 2, that is, after the rotating plate body 5 rotates to the vertical state, the connection frame is connected with the piston rod, and by this arrangement, the convenience of installation can be improved.
In some embodiments of the present invention, as to the specific structure of the slide holder 4, as shown in fig. 9 to 11, a connection arm 41 is rotatably connected to the slide holder 4, and the connection arm 41 is detachably connected to the rotation plate body 5. Specifically, bolts may be provided on the connection arms 41, and the connection with the screw holes in the rotation plate body 5 may be performed by the bolts, and by this arrangement, the components may be easily maintained and replaced, thereby improving the service life of the test system.
In addition, in order to further improve the safety and the connection strength during the rotation of the rotating plate body 5, in some embodiments of the invention, a positioning plate 42 is further fixed on the sliding seat 4, the positioning plate 42 is L-shaped, one side of the positioning plate 42 is fixed on the sliding seat 4, the other side is parallel to the retaining wall 2, and a connection hole 42a is further provided on the side parallel to the retaining wall 2 for connection with the rotating plate body 5. As shown in fig. 10 and 11, the rotating plate body 5 is abutted against the positioning plate 42 after being turned over to the vertical state, and by the arrangement of the connecting holes 42a on the positioning plate 42, it is possible to achieve fastening connection of the positioning plate 42 with the portion of the rotating plate body 5 in contact with, for example, by means of bolts, thereby further improving the force receiving effect, avoiding damage to the rotating shaft portion of the connecting arm 41, and at the same time, enabling the connecting structure to be reinforced.
In order to improve safety during testing, as shown in fig. 12, the retaining wall 2 further has guard plates 9 on both sides in the width direction, and the guard plates 9 cover at least the area between the turned-over rotary plate body 5 and the retaining wall 2. The turning-over refers to the state when the rotating plate body 5 turns over to be vertical, in some embodiments of the present invention, the protecting plate 9 may be fixed in a detachable manner, by this way, if the bracket support 02 portion breaks down when the pressure is too high, the protecting plate 9 may block the flying concrete block, so as to reduce damage to the tester or the external equipment.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A structural performance assessment system for a reinforced concrete bracket as a support, comprising:
a base;
the retaining wall is vertically fixed on the base, and a driving piece is fixed on the retaining wall;
the sliding seat is arranged on the base and can be arranged in a relatively sliding manner in a direction towards or away from the retaining wall;
one end of the rotating plate body is rotationally connected with the sliding seat, a pier pouring die perpendicular to the rotating plate body is arranged at the position, far away from the sliding seat, of the rotating plate body, concrete for pouring tests is used in the pier pouring die, and a bracket pouring die is detachably arranged on one side, facing the retaining wall, of the pier pouring die and used for forming bracket supports;
the bridge pier pouring die is lapped on the retaining wall after the rotating plate body rotates by 90 degrees, the top of a bracket support formed on the bracket pouring die is abutted to the inner wall of the retaining wall, the rotating plate body is provided with a connecting part connected with the driving piece, the bracket support or an inner reinforcing steel bar is provided with a force sensor, and the force sensor is connected with the processor and used for monitoring the stress condition of the bracket support in the extrusion process.
2. The structural performance assessment system using reinforced concrete brackets as support according to claim 1, wherein the pier casting mold is cylindrical and detachably fixed to the rotating plate body.
3. The structural performance assessment system of reinforced concrete bracket as a bracket support according to claim 2, wherein a side of the pier casting mold facing the bracket casting mold has an open window for insertion of reinforcing bars in the bracket support.
4. The structural performance evaluation system using the reinforced concrete bracket as the support according to claim 1, wherein a plurality of parallel guide rails are further fixed on the base, the extending direction of the guide rails is perpendicular to the plane of the retaining wall, the sliding seats are slidably arranged on the guide rails, and the number of the sliding seats is adapted to the number of the guide rails.
5. The structural performance assessment system of claim 4, wherein the rail extends to the edge of the base and the rotating plate bottom has a stiffener, the height of which corresponds to the height of the rail.
6. The structural performance assessment system using the reinforced concrete bracket as the bracket support according to claim 1, wherein the driving member is a hydraulic cylinder, the rotating plate body is provided with a window corresponding to a piston rod of the hydraulic cylinder, the connecting part is a connecting frame with an area larger than the window, and the connecting frame is connected after the rotating plate body rotates 90 degrees.
7. The structural performance assessment system using the reinforced concrete bracket as the bracket support according to claim 1, wherein the sliding seat is rotatably connected with a connecting arm, and the connecting arm is detachably connected with the rotating plate body.
8. The system according to claim 7, wherein a positioning plate is further fixed on the sliding seat, the positioning plate is L-shaped, one side of the positioning plate is fixed on the sliding seat, the other side of the positioning plate is parallel to the retaining wall, and a connecting hole is further formed on the side parallel to the retaining wall for connecting with the rotating plate body.
9. The structural performance assessment system according to claim 1, wherein the retaining wall further has guard plates on both sides in the width direction, the guard plates covering at least an area between the rotating plate body and the retaining wall after being turned over.
10. A method for evaluating the structural performance of a reinforced concrete bracket as a bracket support, characterized by being applied to the system for evaluating the structural performance of a reinforced concrete bracket as a bracket support according to any one of claims 1 to 9, comprising the following steps:
pouring concrete for the test in a pier pouring mould, inserting bracket steel bars into the pier concrete, and attaching stress induction pieces to the bracket steel bars;
installing a bracket pouring die, performing concrete pouring molding of bracket support, and removing the bracket pouring die after the bracket support is molded;
lifting the rotating plate body by using a lifting tool, so that the rotating plate body rotates 90 degrees towards the direction of the retaining wall and is lapped on the retaining wall;
the position of the sliding seat is adjusted, so that the bracket is supported against the inner side of the retaining wall;
connecting the driving end of the driving piece with the rotating plate body, and connecting the stress sensing piece with the processor;
and controlling the driving piece to pull the rotating plate body towards the retaining wall direction, recording force application data and stress data, and verifying whether the stress value under the set pressure meets the design requirement.
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| CN202311759095.0A CN117433822B (en) | 2023-12-20 | 2023-12-20 | Structural performance evaluation system and method using reinforced concrete bracket as support |
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| CN202311759095.0A CN117433822B (en) | 2023-12-20 | 2023-12-20 | Structural performance evaluation system and method using reinforced concrete bracket as support |
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| CN117433822B true CN117433822B (en) | 2024-02-13 |
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