CN109489882B - Cable-stayed bridge cable anchoring and cable force testing device and method for large-size model test - Google Patents
Cable-stayed bridge cable anchoring and cable force testing device and method for large-size model test Download PDFInfo
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- CN109489882B CN109489882B CN201811395594.5A CN201811395594A CN109489882B CN 109489882 B CN109489882 B CN 109489882B CN 201811395594 A CN201811395594 A CN 201811395594A CN 109489882 B CN109489882 B CN 109489882B
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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
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
Abstract
The invention belongs to the vibration test of structural components; the technical field of impact test of structural components discloses a cable-stayed bridge cable anchoring and cable force testing device and method for a large-size model test, and the method comprises the following steps: a cable adjusting screw rod; the right side of the adjusting joint penetrates through a cable guide pipe, a stay cable penetrates through the cable guide pipe, the stay cable is wound on a spool, a wire clamping device is clamped at the lower side inside the adjusting joint, the lower side of a cable adjusting screw rod is welded on the spool, the cable adjusting screw rod is fixed above the adjusting joint through a nut, a gasket is arranged between the nut and the adjusting joint in a cushioning mode, and the upper end of the cable adjusting screw rod is connected with a hand-operated rod in a threaded mode; the left side of the adjusting joint penetrates through a main beam anchoring screw rod, the main beam anchoring screw rod is sleeved with a tension sensor and a main beam anchoring screw cap, and an anti-skid gasket is arranged between the main beam anchoring screw caps in a cushioning mode. The invention ensures that the stress of the stay cable in the large-size cable-stayed bridge model is close to the real stress condition, can conveniently and quickly realize the adjustment of the cable force and the test of the cable force, and is simple and easy to implement and has higher precision.
Description
Technical Field
The invention belongs to the vibration test of structural components; the technical field of impact testing of structural components, in particular to a cable-stayed bridge cable anchoring and cable force testing device and method for a large-size model test.
Background
Currently, the current state of the art commonly used in the industry is such that: the cable-stayed bridge is a high-order hyperstatic flexible system formed by combining a pressure-bearing tower, a pulled cable and a bent beam body, and the structure can be regarded as a multi-span elastic supporting continuous beam with a stay cable replacing a buttress, and has the advantages of reducing the internal bending moment of the beam body, reducing the building height, lightening the self weight of the structure and saving materials. The cable-stayed bridge is mainly used for building a bridge site with the span of 500-800 m, the scale of physical engineering is large, in order to analyze the stress performance, a model test method is mostly adopted for indoor research at present, the geometric dimension of a structural model test is smaller than that of a prototype, the manufacture is easy, the assembly and disassembly are convenient, and the same model can be used for simulation tests of a plurality of different working conditions. At present, for cable-stayed bridge models with different similar proportions and different materials, the size and the initial tension value of the cross section of a stay cable are greatly reduced after similar calculation, and the anchoring form and the cable force test of the cable-stayed bridge model are different from those of the actual engineering. The anchorage of the guy cable is generally realized by tensioning the guy cable to a required value at one time and locking the guy cable by a buckle when the model of the cable-stayed bridge is carried out in a laboratory, the influence of the later construction process on the cable force is ignored, the cable-stayed bridge belongs to a high-order hyperstatic structure, each step in the construction can cause the change of the internal force and the cable force of the whole built bridge structure, the bridge needs to pay attention to the safety of the built structure in the construction process and also needs to consider the structural safety of the full bridge in a bridge state in the construction process, so the cable force and the cable force difference of the bridge in the construction process are very large, if the cable force is fixed in the construction stage, the cable force in the bridge forming stage can not be ensured, the integral line shape of the bridge is not smooth or part of the cable force is over-limited, the danger that the vehicle jolts on the bridge after passing through the vehicle or even the cable of the bridge is broken is increased, therefore, the cable force of the inhaul cable needs to be adjusted for many times in the whole construction process, and the design requirement can be met. The method is very inconvenient for adjusting the cable force and has low control precision on the tension value. The cable force testing method for the model generally adopts the mode that a tension sensor is arranged in the middle of a stay cable, the stay cable is too thin, the sensor is difficult to fix during connection, the mass of the sensor is larger than that of the stay cable of the test model, after the sensor is connected with the stay cable in series, the stay cable is easy to slip and loosen, an anchoring system fails, and the properties of the whole stay cable such as mass, rigidity and the like are changed, so that the error of experimental data is larger. The model test is a means of carrying out scale reduction according to a certain proportion according to an actual bridge structure and carrying out research on the premise of not changing the rule of an experimental result. Compared with the actual engineering, the proportion of the model test can only reach 1/20 of the original size, and the structure is complex and sensitive. At present, no cable force test sensor specially used for model tests is available, usually, a tension sensor adopted on an actual bridge is used for carrying out tests, the actual cable-stayed bridge has a huge structure, the span of the actual cable-stayed bridge can reach about 500-800 m, the tower height can reach more than 100m, the size of the cable force test sensor of a stay cable is larger than that of a single steel strand of the model test, the weight is larger, the sensor and the stay cable cannot be well fixed due to the adoption of a conventional connection method of directly connecting the stay cable in series, relative slippage is generated, and the deviation of test results is caused. According to the previous test results, the cable force can automatically loosen by 10-20% every 24 hours, and the accuracy of the experiment is seriously influenced.
In summary, the problems of the prior art are as follows:
(1) the prior art adopts at cable mid-mounting tension sensor, because the suspension cable is too thin, the sensor is difficult fixed when connecting, and the quality of sensor is great for test model's cable, establishes ties with the suspension cable after, and the slippage takes place easily for the suspension cable, relaxs, and anchoring system loses efficacy, and properties such as the quality of whole cable, rigidity all change, lead to the experimental data error great.
(2) The cable adjusting is inconvenient, the cost is higher and the precision is lower than that of the tested cable force, which are easily caused by infirm cable clamping in the existing model test.
The difficulty and significance for solving the technical problems are as follows:
the stay cable for the indoor model test is limited by the design of a real bridge and the scale reduction ratio, and only a single steel strand can be used for the test in order to make the scaled indoor model comparable to the actual engineering stress state. At present, 7 steel strands are adopted to be twisted into one bundle in an actual cable-stayed bridge, 30-130 bundles of steel strand sets are configured according to stress requirements to form a stay cable, and hundreds of stay cables are configured in a full-bridge mode to assist a bridge deck system to bear loads of vehicles, pedestrians and the environment. And after the laboratory bridge model is scaled down, each stay cable can only adopt a single steel strand with the diameter of only 15.2mm, and the tightness of the stay cable needs to be adjusted at any time according to the construction process in the experimental process of the steel strand so as to control the stress state of each steel strand (stay cable in the model), so that the stress state of each steel strand (stay cable in the model) is consistent with the same-stage state of the actual bridge engineering, and scientific research is guided. Too thin single steel strand wires can't guarantee under the state that the nature stretches directly to be connected with the sensor for the cable force test, and because the suspension cable both ends need anchor at the bridge tower and the beam bottom of cable-stay bridge, also can't carry out the cable force through direct elasticity steel strand wires and adjust, consequently need the experimenter to design by oneself and can fix the suspension cable and the cable anchoring system that is connected with cable force testing arrangement.
The single steel strand wires diameter is little, and the quality is light, and the surface is smooth, need consider when being connected with anchor system because anchor device and cable force testing arrangement quality are far greater than the steel strand wires and produce gravity to the steel strand wires and pull and lead to the cable force and continuously increase, receives anchor device and testing arrangement's influence, makes the atress characteristic that experimental data can not truly reflect cable-stay bridge model itself, and the error reaches more than 30%. When the stay cable and the anchoring device are contacted to cause serious relative slippage, the error is more than 3 times of the actual test result.
In summary, the research on the stay cable anchoring and cable force testing device for the indoor cable-stayed bridge model, which is light, strong in sliding resistance, stable and portable, is urgently needed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cable-stayed bridge cable anchoring and cable force testing device and method for a large-size model test.
The invention is realized in such a way that a cable-stayed bridge cable anchoring and cable force testing device for a large-size model test is provided with:
a cable adjusting screw rod;
the upper side of the adjusting joint penetrates through a cable guide pipe, a stay cable penetrates through the cable guide pipe, the stay cable is wound on a cable adjusting screw spindle and penetrates through an upper anchoring screw to be connected with a tension sensor, and wire clamping devices are clamped at the upper side and the lower side inside the adjusting joint;
the right end of the cable adjusting screw rod is welded with the left end of the main line shaft, the cable adjusting screw rod is fixed at the left end of the adjusting joint through a nut, a fixed gasket and a left end screw joint hand rocker of the cable adjusting screw rod are arranged between the nut and the adjusting joint in a cushioning mode;
the lower side of the adjusting joint penetrates through a main beam anchoring screw rod, a stay cable in the main beam anchoring screw rod is connected with the upper end of a tension sensor, the lower end of the tension sensor is connected with a lower anchoring screw rod, a main beam anchoring nut is sleeved on the lower anchoring screw rod, and an anti-slip gasket is arranged between the main beam anchoring nuts.
Furthermore, one end of the wire clamping device is clamped and fixed with the adjusting joint, and the other end of the wire clamping device is tightly contacted with the cable adjusting screw rod; the hand-operated lever is screwed at the left end of the cable adjusting screw rod.
Furthermore, the anchoring screw on the main beam is in threaded connection with the lower surface of the adjusting joint, is symmetrically distributed on the different sides of the adjusting joint together with the inhaul cable guide pipe, and is positioned on the same straight line;
furthermore, the stay cable is fixed on the main tower, and the main beam lower anchoring screw is clamped in the main beam; the main beam is provided with an anchor backing plate which is perpendicular to the lower anchor screw of the main beam, and the main beam anchor screw is screwed on the anchor backing plate through two main beam anchor nuts.
Further, the two main beam anchoring nut pads are provided with anti-slip gaskets.
Furthermore, the left end of the adjusting joint is in threaded connection with a nut, and a cable adjusting screw is in threaded connection with the nut and extends into the adjusting joint; a fixing washer is disposed between the nut and the adjusting joint.
Furthermore, a through hole penetrating through the left surface and the right surface of the adjusting joint is formed in the adjusting joint, and the inner diameter of the through hole is larger than the outer diameter of the cable adjusting screw rod; the stay cable guide pipe is communicated with the through hole.
Furthermore, a thinning notch is formed in the through hole of the adjusting joint of the cable adjusting screw rod; the cable adjusting screw rod is provided with a widening area in a contact area with the wire clamping device.
The invention also aims to provide a stay cable anchoring and cable force testing method for the large-size model test, which applies the stay cable anchoring and cable force testing device for the large-size model test, wherein the stay cable anchoring and cable force testing method for the large-size model test comprises the following steps:
step one, calculating the size of each section of the model according to the reduced scale of the stay cable and manufacturing a bridge model;
step two, manufacturing or preparing the above device accessories;
thirdly, one end of a stay cable which has a length which is 10cm more than the actual length of the stay cable passes through the stay cable guide pipe, is fixed and is wound on the cable adjusting screw rod;
step four, the other end of the stay cable is fixedly arranged in the anchor cable area of the main tower;
after the girder anchoring screw rod is welded with the tension sensor, one end of the girder anchoring screw rod is fixedly assembled on the adjusting joint, and the other end of the girder anchoring screw rod is fixed on the anchor backing plate through a girder anchoring nut;
after the model is manufactured, pulling out the hand-operated rod, adjusting a cable force value by rotating the cable adjusting screw rod, pulling the tension sensor by the tensioned or loosened stay cable, connecting the tension sensor to the data acquisition instrument, converting the slight stress change in the tension sensor into a cable force value changed in the stay cable by the data acquisition instrument, and outputting the cable force value on the instrument correlation display, so that the value of the stay cable during tensioning can be read and controlled by the data acquisition instrument connected with the tension sensor;
step seven, after the cable force is adjusted, rotating the hand-operated rod to enable the wire clamping device to slide into the widening area of the adjusting joint from the narrowing notch of the adjusting joint, pushing the hand-operated rod in, and pressing the stay cable tightly;
and step eight, screwing the nut to fix the adjusting joint, clamping the stay cable, and reading a cable force value of the stretched stay cable through a data acquisition instrument connected with the tension sensor.
Another object of the present invention is to provide a stay cable using the stay cable anchoring and cable force testing apparatus for a large-sized model test.
In summary, the advantages and positive effects of the invention are: aiming at the defect that the stay cable cannot be conveniently adjusted in the existing cable force testing process, an adjusting joint structure is arranged, the structure is opened and closed, the stay cable and a main beam anchoring screw are conveniently installed and connected, a cable adjusting screw is arranged in the structure, and the stay cable is wound (or loosened) on the cable adjusting screw in a manner of rotating the cable adjusting screw so as to achieve the purpose of tightening (or loosening) the stay cable, so that the stay cable is conveniently adjusted; meanwhile, in the cable adjusting process, the problem that the cable is easy to loosen is easily caused, a thinning notch is formed in a cable adjusting screw rod cable winding area, and the cable adjusting and clamping functions are simply switched through the contact mode of a wire clamping device and a cable adjusting screw rod widening area, so that the stability of the cable is improved; meanwhile, aiming at the vibration influence on the main beam anchoring screw rod caused by the subsequent procedures of main beam loading, drilling and the like after the stay cable is anchored, the double-main-beam anchoring screw cap is adopted, and the anti-skid washer is added between the two main beam anchoring screw caps, so that the vibration influence on a stay cable anchoring system is relieved, and the integral anchoring force of the system is increased; and meanwhile, the anchor backing plate is arranged, so that the structure of the bearing point is firmer.
The stay cable anchoring and cable force testing device for the large-size model test enables the stress of the stay cable in the large-size stay cable model to be close to the real stress condition, can conveniently and quickly realize the adjustment of the cable force and the test of the cable force, and is simple and easy to implement and higher in precision.
Drawings
FIG. 1 is a schematic structural view of a cable-stayed bridge cable anchoring and cable force testing device for a large-size model test according to an embodiment of the present invention;
FIG. 2 is a schematic view of a cable-stayed bridge cable anchoring and cable force testing device for a large-size model test provided by an embodiment of the invention installed on a cable-stayed bridge model;
FIG. 3 is an enlarged view of portion A of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a schematic view of an initial structure of a stay cable and a cable adjusting screw according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a cable adjusting screw being pulled out to adjust a cable according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of adjusting the cable force of a stay cable according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a stay cable after the cable force of the stay cable is adjusted and the stay cable is locked by the cable adjusting screw rod according to the embodiment of the present invention;
in the figure: 1. a cable adjusting screw rod; 2. a nut; 3. fixing a gasket; 4. a cable guide tube; 5. a stay cable; 6. adjusting the joint; 7. a wire clamping device; 8. a main beam anchoring screw; 9. a tension sensor; 10. an anti-slip washer; 11. a main beam anchoring nut; 12. an anchor backing plate; 13. a main beam; 14. a main tower; 15. a main pier; 16. a hand lever.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention aims to solve the problems that in the prior art, a tension sensor is arranged in the middle of a stay cable, the sensor is difficult to fix during connection due to the fact that a stay cable is too thin, the mass of the sensor is larger than that of the stay cable of a test model, the stay cable is easy to slip and loosen after being connected with the stay cable in series, an anchoring system fails, and the properties such as the mass, the rigidity and the like of the whole stay cable are changed, so that the error of experimental data is larger; the problems of inconvenient cable adjustment, higher cost and higher precision compared with the tested cable force caused by infirm cable clamping in the existing model test are easy to occur. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test enables the stress of a stay cable in a large-size stay cable model to be close to the real stress condition, can conveniently and quickly realize the adjustment of the cable force and the test of the cable force, and is simple and easy to implement and higher in precision.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1, a stay cable anchoring and cable force testing device for a large-size model test according to an embodiment of the present invention includes: the cable-adjusting device comprises a cable-adjusting screw rod 1, a nut 2, a fixing gasket 3, a cable guide pipe 4, a stay cable 5, an adjusting joint 6, a wire clamping device 7, a main beam anchoring screw rod 8, a tension sensor 9, an anti-skidding gasket 10, a main beam anchoring nut 11, an anchor backing plate 12, a main beam 13, a main tower 14, a main pier 15 and a hand-operated rod 16.
The right side of an adjusting joint 6 penetrates through a stay cable guide tube 4, a stay cable 5 penetrates through the interior of the stay cable guide tube 4, the stay cable 5 is wound on a main line shaft, a wire clamping device is clamped at the lower side of the interior of the adjusting joint 6, the lower end of a cable adjusting screw rod 1 is welded at the upper end of the main line shaft, the cable adjusting screw rod 1 is fixed above the adjusting joint 6 through a nut 2, a fixing gasket 3 is padded between the nut 2 and the adjusting joint 6, and the upper end of the cable adjusting screw rod 1 is connected with a hand-operated rod 16; the left side of the adjusting joint 6 penetrates through a main beam anchoring screw 8, the main beam anchoring screw 8 is sleeved with a tension sensor 9 and a main beam anchoring nut 11, and an anti-skid gasket 10 is arranged between the main beam anchoring nuts 11 in a cushioning mode.
As shown in fig. 2, above the main pier 15 is a main tower 14, and the main girders 13 are vertically arranged between the main pier 15 and the main tower 14. During testing, one end of the stay cable 5 is fixedly arranged on the main tower 14, and the other end of the stay cable penetrates through the stay cable guide pipe 4 to extend into the adjusting joint 6 and is wound on the cable adjusting screw rod 1. The cable guide tube 4 is used for keeping the cable straight, so that the cable cannot be bent after extending out of the adjusting joint 6. The main beam anchor screw 8 is mounted in the main beam 13.
As shown in figure 3, in consideration of the problem that a bearing point can bear excessive force, the anchor backing plate 12 which is perpendicular to the main beam anchor screw 8 is arranged in the main beam 13, and the main beam anchor screw 8 is arranged on the anchor backing plate 12 through the main beam anchor nut 11.
As shown in fig. 4-7, the basic adjustment principle of the adjustment joint 6 for preventing the stay cable 5 from loosening is that the wire clamping device 7 is fixed with the cable adjusting screw rod 1, and the initial structure of the stay cable matched with the cable adjusting screw rod is shown in fig. 4. When the nut 2 is loosened and the hand lever 16 is pulled out, the wire clamping device 7 is dragged by the adjusting joint 6 to slide to the widening area of the cable adjusting screw rod 1, and the cable adjusting space in the area of the narrowing notch of the cable adjusting screw rod 1 is released, as shown in fig. 5. After the cable adjustment is finished, the hand-operated rod 16 is pushed in the direction of the adjusting joint 6, the wire clamping device 7 is dragged by the adjusting joint 6 to slide to the tapered notch area of the cable adjusting screw rod 1, the wire clamping device 7 is in contact with the cable adjusting screw rod 1 and supports the stay cable 5 wound in the tapered notch area of the adjusting joint 6, the nut 2 is screwed on to fix the adjusting joint 6, and the stay cable 5 is clamped.
The basic adjustment principle of the adjustment joint 6 for adjusting the cable force in the stay cable 5 is that the stay cable 5 extending into the adjustment joint 6 is wound on the cable adjusting screw 1 by rotating the hand rocker 16 to drive the cable adjusting screw 1, and the length of the stay cable 5 outside the adjustment joint 6 is shortened, so that the purpose of tensioning the stay cable 5 is achieved. When the stay cable 5 needs to be loosened, the cable adjusting screw 1 is rotated in the reverse direction to detach the stay cable 5 from the cable adjusting screw 1, as shown in fig. 5 and 6. In fig. 5, the cable adjusting screw 1 is not rotated, and in fig. 6, the cable adjusting screw 1 is rotated to wind the stay cable 5 thereon, and the stay cable 5 is tightened. Through the simple and convenient adjusting mode, the cable force can be adjusted rapidly and laborsavingly, and the cable force can be accurately adjusted and controlled.
The stay cable and stay cable anchoring and cable force testing method for the large-size model test provided by the embodiment of the invention comprises the following steps:
step one, calculating the size of each section of the model according to the reduced scale of the stay cable and manufacturing a bridge model;
step two, manufacturing or preparing the above device accessories;
thirdly, one end of a stay cable which has a length which is 10cm more than the actual length of the stay cable passes through the stay cable guide pipe, is fixed and is wound on the cable adjusting screw rod;
step four, the other end of the stay cable is fixedly arranged in the anchor cable area of the main tower;
after the main beam anchoring screw rod is welded with the tension sensor, one end of the main beam anchoring screw rod is fixedly assembled on the adjusting joint, and the other end of the main beam anchoring screw rod is fixed on the anchor backing plate through a main beam anchoring nut;
after the model is manufactured, pulling out the hand-operated rod, adjusting a cable force value by rotating a cable adjusting screw rod, and reading and controlling a value of the stay cable during tensioning through a data acquisition instrument connected with a tension sensor;
step seven, after the cable force is adjusted, rotating the hand-operated rod to enable the wire clamping device to slide into the widening area of the adjusting joint from the narrowing notch of the adjusting joint, pushing the hand-operated rod in, and pressing the stay cable tightly;
and step eight, screwing the nut to fix the adjusting joint, clamping the stay cable, and reading a cable force value of the stretched stay cable through a data acquisition instrument connected with the tension sensor.
The interior of the adjusting joint 6 provided by the invention is connected with the wire clamping device 7, and the wire clamping device 7 is contacted with the cable adjusting screw rod 1. The adjusting joint 6 is a top-down structure, which is connected to the stay cable 5 on one hand and to the tension sensor 9 on the other hand. In the scheme, the influence of the overall mass of the tension sensor 9 on the test model is considered to be large, and the tension sensor 9 is not arranged on the stay cable 5, but arranged on the other side of the adjusting joint 6 and arranged on the opposite side of the stay cable 5. The main function of the adjusting joint 6 is to adjust the tension of the stay cable 5 and prevent the stay cable 5 from loosening to reduce the cable force.
The main beam anchoring screw 8 provided by the invention has two main functions, firstly, because the rigidity is high, the tension sensor 9 is arranged in the main beam anchoring screw, so that the influence of the quality of the sensor on the stay cable 5 can be avoided; and the second is used for connecting with the main beam 13. During specific setting, the main beam anchoring screw 8 can be disconnected from the middle part, the tension sensor 9 is welded at the middle part, the tension sensor 9 is connected in series to form a part of the main beam anchoring screw, and the main beam anchoring screw 8 is collinear with the stay cable 5 during testing, so that data acquired by the tension sensor 9 can accurately reflect the cable force condition, and the data acquired by the sensor is acquired by the data acquisition instrument; because the thickness of the main beam in the stay cable model is limited, the tension sensor 9 adopts a conventional tension sensor for reinforcing steel bars, the arrangement is convenient, the measurement result is accurate, and the size is 12cm multiplied by 2.5 cm.
The position of the cable adjusting screw rod 1 provided by the invention needs to be fixed after rotation, and the nut 2 is arranged in the cable adjusting screw rod. The nut 2 is fixedly arranged with the adjusting joint 6 and is matched with the cable adjusting screw rod 1. The cable adjusting screw rod 1 extends into a through hole inside the adjusting joint 6 and is not contacted with the wall of the through hole, and the space left by the thinned notch is used for winding the stay cable 5. Since the cable adjusting screw rod 1 moves up and down after rotating, the stay cable 5 can not be wound on the same position on the cable adjusting screw rod 1 to be clamped. Be provided with fixed shim 3 between nut 2 and the adjustment joint 6, fixed shim 3 can prevent that the cable end is overhanging to the inside operational environment of protection adjustment joint 6. And a pair of threaded holes are symmetrically formed in the side wall of the adjusting joint 6 and are respectively used for being connected with the inhaul cable guide pipe 4 and the main beam anchoring screw 8. The wall thickness of the adjusting joint 6 is 12 mm-18 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a jumbo size model is experimental with cable-stay bridge cable anchor and cable force testing arrangement which characterized in that, jumbo size model is experimental with cable-stay bridge cable anchor and cable force testing arrangement is provided with:
a cable adjusting screw rod;
the upper side of the adjusting joint penetrates through a cable guide pipe, a stay cable penetrates through the cable guide pipe, the stay cable is wound on a cable adjusting screw spindle and penetrates through an upper anchoring screw to be connected with a tension sensor, and wire clamping devices are clamped at the upper side and the lower side inside the adjusting joint;
the right end of the cable adjusting screw rod is welded with the left end of the main line shaft, the cable adjusting screw rod is fixed at the left end of the adjusting joint through a nut, a fixed gasket and a left end screw joint hand rocker of the cable adjusting screw rod are arranged between the nut and the adjusting joint in a cushioning mode;
the lower side of the adjusting joint penetrates through a main beam anchoring screw rod, a stay cable in the main beam anchoring screw rod is connected with the upper end of a tension sensor, the lower end of the tension sensor is connected with a lower anchoring screw rod, a main beam anchoring screw cap is sleeved on the lower anchoring screw rod, and an anti-skid gasket is arranged between the main beam anchoring screw caps in a cushioning mode;
the cable adjusting screw is provided with a thinning notch in a through hole of the adjusting joint; the cable adjusting screw rod is provided with a widening area in a contact area with the wire clamping device.
2. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 1, wherein one end of the wire clamping device is clamped and fixed with the adjusting joint, and the other end of the wire clamping device is tightly contacted with the cable adjusting screw rod; the hand-operated lever is screwed at the left end of the cable adjusting screw rod.
3. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 1, wherein the anchoring screw on the main beam is in threaded connection with the lower surface of the adjusting joint, is symmetrically distributed on the opposite side of the adjusting joint with the cable guide pipe, and is positioned on the same straight line.
4. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 1, wherein the stay cable is fixed on the main tower, and the main beam lower anchoring screw is clamped in the main beam; the main beam is provided with an anchor backing plate which is perpendicular to the lower anchor screw of the main beam, and the main beam anchor screw is screwed on the anchor backing plate through two main beam anchor nuts.
5. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 4, wherein the two main beam anchoring nut pads are provided with anti-slip washers.
6. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 1, wherein a nut is screwed at the left end of the adjusting joint, and a cable adjusting screw is screwed in the nut and extends into the adjusting joint; a fixing washer is disposed between the nut and the adjusting joint.
7. The cable-stayed bridge cable anchoring and cable force testing device for the large-size model test as claimed in claim 1, wherein a through hole penetrating through the left and right surfaces of the adjusting joint is formed in the adjusting joint, and the inner diameter of the through hole is larger than the outer diameter of the cable adjusting screw rod; the stay cable guide pipe is communicated with the through hole.
8. A cable-stayed bridge cable anchoring and cable force testing method for a large-size model test, which applies the cable-stayed bridge cable anchoring and cable force testing device for the large-size model test according to claim 1, is characterized by comprising the following steps:
step one, calculating the size of each section of the model according to the reduced scale of the stay cable and manufacturing a bridge model;
step two, manufacturing or preparing the above device accessories;
thirdly, one end of a stay cable which has a length which is 10cm more than the actual length of the stay cable passes through the stay cable guide pipe, is fixed and is wound on the cable adjusting screw rod;
step four, the other end of the stay cable is fixedly arranged in the anchor cable area of the main tower;
after the girder anchoring screw rod is welded with the tension sensor, one end of the girder anchoring screw rod is fixedly assembled on the adjusting joint, and the other end of the girder anchoring screw rod is fixed on the anchor backing plate through a girder anchoring nut;
after the model is manufactured, pulling out the hand-operated rod, adjusting a cable force value by rotating a cable adjusting screw rod, and reading and controlling a value of the stay cable during tensioning through a data acquisition instrument connected with a tension sensor;
step seven, after the cable force is adjusted, rotating the hand-operated rod to enable the wire clamping device to slide into the widening area of the adjusting joint from the narrowing notch of the adjusting joint, pushing the hand-operated rod in, and pressing the stay cable tightly;
and step eight, screwing the nut to fix the adjusting joint, clamping the stay cable, and reading a cable force value of the stretched stay cable through a data acquisition instrument connected with the tension sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811395594.5A CN109489882B (en) | 2018-11-22 | 2018-11-22 | Cable-stayed bridge cable anchoring and cable force testing device and method for large-size model test |
Applications Claiming Priority (1)
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| CN113218687B (en) * | 2021-04-29 | 2023-01-20 | 四川农业大学 | Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device and test method thereof |
| CN114061878A (en) * | 2021-11-19 | 2022-02-18 | 江苏科技大学 | Device for cable-beam coupling vibration test |
| CN116907827B (en) * | 2023-09-14 | 2023-11-17 | 贵州省公路工程集团有限公司 | Dynamic testing device and method for detachable anchor point device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050164U (en) * | 1989-04-24 | 1989-12-27 | 浙江省建筑科学研究所 | Fully-machinery direct-reading steel wire stretch-draw force testing instrument |
| CN2185433Y (en) * | 1994-03-07 | 1994-12-14 | 山西矿业学院 | Dynamic measurer for tension of steel wire rope |
| CN203050133U (en) * | 2013-02-07 | 2013-07-10 | 中冶建工集团有限公司 | Prestressed steel structure drag cable tensioning device capable of accurately measuring tension force |
| CN204389083U (en) * | 2015-02-11 | 2015-06-10 | 长安大学 | A kind of model test suspension cable anchoring and cable tension test device |
| CN204812959U (en) * | 2014-11-16 | 2015-12-02 | 李铭 | Guardrail elevating gear |
| CN206410808U (en) * | 2017-01-19 | 2017-08-15 | 威海锦腾汽车配件有限公司 | Wiring harness terminal tensile test mechanism |
| US10071862B1 (en) * | 2017-03-10 | 2018-09-11 | Flexicon Corporation | Automated tensioning system for cable or chain conveyor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3028226A1 (en) * | 2014-11-06 | 2016-05-13 | Driss Abandarat | DEVICE FOR TENSIONING A STRAP INCLUDING A MEANS FOR DETECTING SAID VOLTAGE |
| CN205538061U (en) * | 2016-02-04 | 2016-08-31 | 广东盛翔交通工程检测有限公司 | Area fork earing pole suo li test and calbiration system |
| DE102016009100A1 (en) * | 2016-07-27 | 2018-02-01 | Richard Buchmann | Measuring device for determining the titer or filament diameter of plain yarns |
-
2018
- 2018-11-22 CN CN201811395594.5A patent/CN109489882B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050164U (en) * | 1989-04-24 | 1989-12-27 | 浙江省建筑科学研究所 | Fully-machinery direct-reading steel wire stretch-draw force testing instrument |
| CN2185433Y (en) * | 1994-03-07 | 1994-12-14 | 山西矿业学院 | Dynamic measurer for tension of steel wire rope |
| CN203050133U (en) * | 2013-02-07 | 2013-07-10 | 中冶建工集团有限公司 | Prestressed steel structure drag cable tensioning device capable of accurately measuring tension force |
| CN204812959U (en) * | 2014-11-16 | 2015-12-02 | 李铭 | Guardrail elevating gear |
| CN204389083U (en) * | 2015-02-11 | 2015-06-10 | 长安大学 | A kind of model test suspension cable anchoring and cable tension test device |
| CN206410808U (en) * | 2017-01-19 | 2017-08-15 | 威海锦腾汽车配件有限公司 | Wiring harness terminal tensile test mechanism |
| US10071862B1 (en) * | 2017-03-10 | 2018-09-11 | Flexicon Corporation | Automated tensioning system for cable or chain conveyor |
Non-Patent Citations (2)
| Title |
|---|
| 某景区人行玻璃索桥荷载试验及安全评估;代建波 等;《水利与建筑工程学报》;20180831;第16卷(第4期);全文 * |
| 气动措施对斜拉索风荷载及结构响应影响分析;李哲;《中国优秀硕士学位论文全文数据库》;20100514;全文 * |
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