CN110726615A - Loading device suitable for T-shaped beam column node test and using method thereof - Google Patents
Loading device suitable for T-shaped beam column node test and using method thereof Download PDFInfo
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- CN110726615A CN110726615A CN201911144164.0A CN201911144164A CN110726615A CN 110726615 A CN110726615 A CN 110726615A CN 201911144164 A CN201911144164 A CN 201911144164A CN 110726615 A CN110726615 A CN 110726615A
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses a loading device suitable for a T-shaped beam-column node test and a using method thereof, which solve the problems of higher requirement on test conditions and high cost of the beam-column node test loading device in the prior art, can be used under the condition of no driving, and has high disassembly and assembly efficiency and low cost; the technical scheme is as follows: the device comprises a supporting framework, wherein a fixed hinged support is arranged on the supporting framework, a movable hinged support which is in sliding connection with one side of the supporting framework is arranged above the fixed hinged support, and a plurality of prestress applying rods for applying axial pressure are symmetrically arranged between the movable hinged support and the fixed hinged support; a plurality of chain blocks for hoisting the test columns and the test beams or adjusting the positions of the movable hinged supports are arranged above the movable hinged supports, and an actuator is arranged on one side of each chain block; two lateral supports for supporting the test beam are arranged at a set distance from the fixed hinge support.
Description
Technical Field
The invention relates to the field of structural stress performance test devices, in particular to a loading device suitable for a T-shaped beam column node test and a using method thereof.
Background
With the rapid development of the infrastructure of China, the mechanical property test of the structure is concerned more and more. Whether the building is built by using new materials, new technologies and new processes or the building with an overrun needs to be subjected to related structural mechanical property tests so as to ensure the safety and reliability of the building in practical application.
The beam column node is used as a key part in a frame structure, and the mechanical property of the beam column node directly determines the structural safety of the whole building, so that a structural mechanical property test of the beam column node is necessary. Depending on the purpose of the test, the test is divided into a research test and a detection test. The detection test is for actual engineering service, and the conditions of the test are often lower than those of research tests, so that a beam column node test device suitable for low conditions and low cost is needed.
At present, the test method and the loading device of the beam column node are quite mature, and generally comprise a hoisting system, a reaction frame system, a support system, a load application system and a lateral support system. The inventor finds that a hoisting system is generally selected from a large-scale travelling crane in a laboratory, and a load application system is generally selected from a hydraulic jack, however, under the condition of lacking laboratory resources, a test component cannot complete hoisting, carrying and load application, so that the requirement on test conditions is high, and the cost is high.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a loading device suitable for a T-shaped beam column node test, which can be used under the condition of no driving. The hinged support is of a mortise and tenon plate structure connected through a bolt, and can be disassembled and assembled in real time in the installation process, so that the test column can be quickly installed. The axial force of the test column is applied by adopting a prestressed rod, the axial force of the test column is controlled by monitoring the strain reading of the prestressed rod in real time, and the test is realized under the condition without a jack. Meanwhile, the lateral support has the characteristics of adjustable vertical height and adjustable horizontal distance, and is suitable for node tests of different sizes.
The invention also provides a use method of the loading device suitable for the T-shaped beam column node test.
The invention adopts the following technical scheme:
a loading device suitable for a T-shaped beam column node test comprises a supporting frame, wherein a fixed hinged support is installed on the supporting frame, a movable hinged support which is in sliding connection with one side of the supporting frame is arranged above the fixed hinged support, and a plurality of prestress applying rods for applying axial pressure are symmetrically installed between the movable hinged support and the fixed hinged support;
a plurality of chain blocks for hoisting the test columns and the test beams or adjusting the positions of the movable hinged supports are arranged above the movable hinged supports, and an actuator is arranged on one side of each chain block; two lateral supports for supporting the test beam are arranged at a set distance from the fixed hinge support.
Further, the lateral supports comprise H-shaped steel columns and platform connecting plates arranged at one ends of the H-shaped steel columns, and reinforcing ribs are connected between the platform connecting plates and the H-shaped steel columns;
and a steel wheel is arranged on one side of the H-shaped steel column, the mounting position of the steel wheel is adjustable, and the steel wheel can be contacted with a lateral support plate on the test beam.
Furthermore, a plurality of split bolt holes are formed in the flange of the H-shaped steel column, and a plurality of fault-tolerant holes are formed in the end portion of the platform connecting plate.
Further, the movable hinged support comprises a first hinged part and a second hinged part which are connected together through a first bolt, the second hinged part is connected with the mounting plate through a split bolt, and the movable hinged support is connected with the support frame through a space formed between the mounting plate and the second hinged part; a hanging ring is arranged on the mounting plate; the first bolt consists of a bolt main body with a variable diameter and a handle arranged at one end of the main body.
Furthermore, the second hinge part comprises a first mortise plate connected with the first hinge part, the side surface of the first mortise plate is connected with a first prestress applying plate, the first prestress applying plate is vertically connected with the connecting plate, and a vertical stiffening plate is arranged between the first prestress applying plate and the connecting plate; and a lifting ring is arranged on the connecting plate.
Further, the fixed hinge support comprises a third hinge part and a fourth hinge part, and the third hinge part and the fourth hinge part are connected through a second bolt; the second bolt comprises a bolt main body with a variable diameter and a handle arranged at one end of the main body.
Furthermore, braced frame includes test platform, and the symmetry installation pillar in test platform top links to each other through the counter-force roof beam between the pillar.
Furthermore, the chain block is arranged below the counter-force beam, and the actuator is connected with the counter-force beam; the movable hinged support is arranged on the support.
A use method suitable for a loading device for a T-shaped beam column node test comprises the following steps:
step (1), installing a test column:
1) taking down the third hinged part of the fixed hinged support and the first hinged part of the movable hinged support, and respectively connecting the third hinged part of the fixed hinged support and the first hinged part of the movable hinged support with the end part of the test column through bolts;
2) hoisting the test column to the mounting position of the fixed hinged support through the chain block, adjusting the position of the test column to enable the third hinged part to correspond to the fourth hinged part, and inserting the second bolt into the third hinged part and the fourth hinged part;
3) the position of the movable hinged support is adjusted through the two chain blocks, so that a first hinged part and a second hinged part of the movable hinged support correspond to each other and are connected through a first bolt;
step (2), installing a test beam: hoisting the test beam to an installation position through a chain block, and realizing the connection between the test beam and the test column by utilizing the fine adjustment of the chain block;
step (3), installing a lateral support: adjusting the distance between the two lateral supports to a proper position, and fixing the lateral supports on the test platform through bolts;
step (4) applying pressure to the test column: connecting the prestress applying rod with the movable hinged support and the fixed hinged support, applying tension to the prestress applying rod by using a torque wrench, and reading a strain value of the prestress applying rod in real time; stopping applying the tensile force to the prestress applying rod when the strain of the prestress applying rod reaches the axial compression ratio required by the test;
and (5) limiting the horizontal movement of the movable hinged support: after the prestress reaches the tensile force required by the test, screwing the mounting plate and the connecting plate of the movable hinged support by using a split bolt;
and (6) starting the actuator to start the test.
Further, in the step (3), when the steel wheel on the lateral support just abuts against the lateral support plate on the test beam, and the steel wheel can freely rotate, the steel wheel is in a proper position between the lateral supports.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with the prestress applying rod to replace a jack, so that the test can be carried out under the condition of low conditions;
2. the lateral support has height-adjustable support points, namely steel wheels, and can be horizontally adjusted, so that the lateral support is suitable for node tests with different sizes, and the purposes of supporting a test beam and not increasing lateral friction are achieved; the counter-pulling bolts are arranged on the lateral supports, so that the rigidity of the lateral supports can be improved, and the influence of the deformation of the lateral supports on the test can be reduced;
3. compared with the traditional test loading device, the test loading device can realize the test under the condition of no large hoisting equipment such as a travelling crane and the like, so that the test under the low condition becomes possible; the installation problem of the test beam column is solved through the arrangement of the chain block, the fixing problem of the movable hinged support is solved, and the test under low conditions is realized with low cost;
4. the hinge support tenon-and-mortise plate can realize efficient disassembly and assembly of the support, so that a large amount of manpower and material resources are saved; the first hinge part and the third hinge part of the hinge support and the test column are installed in advance, so that the installation of the test column becomes efficient, and only the first hinge part and the third hinge part are connected with the second hinge part and the fourth hinge part by using bolts during the installation, so that the assembly and disassembly of a test member are accelerated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a front view of a first embodiment of the present invention;
FIG. 2 is a side view of a first embodiment of the present invention;
fig. 3 is a schematic structural view of a fixed hinge support according to a first embodiment of the present invention;
FIG. 4 is a front view of a third hinge according to a first embodiment of the present invention;
FIG. 5 is a side view of a third hinge according to a first embodiment of the present invention;
FIG. 6 is a top view of a third hinge according to a first embodiment of the present invention;
FIG. 7 is a front view of a fourth hinge according to a first embodiment of the present invention;
figure 8 is a side view of a fourth hinge according to a first embodiment of the present invention;
FIG. 9 is a top view of a fourth hinge according to a first embodiment of the present invention;
fig. 10 is a schematic structural view of a rotating shaft according to a first embodiment of the present invention;
fig. 11 is a schematic structural view of a movable hinge support according to a first embodiment of the present invention;
FIG. 12 is a front view of a second hinge according to a first embodiment of the present invention;
figure 13 is a side view of a second hinge according to a first embodiment of the present invention;
FIG. 14 is a top view of a second hinge according to a first embodiment of the present invention;
FIG. 15 is a schematic view of a mounting plate according to a first embodiment of the present invention;
FIG. 16 is a side view of a lateral support according to a first embodiment of the present invention;
FIG. 17 is a front view of a lateral support according to a first embodiment of the present invention
FIG. 18 is a top view of a lateral support according to a first embodiment of the present invention;
wherein, wherein: 1. test platform, 2, pillar, 3, counterforce beam, 4, chain block, 41, first chain block, 42, second chain block, 43, third chain block, 44, fourth chain block, 5, actuator, 6, fixed hinge support, 61, third hinge joint, 611, tenon plate, 612, bolt hole, 613, column end connecting plate, 614, bolt hole, 62, fourth hinge joint, 621, second mortise plate, 622, bolt hole, 623, second prestress applying plate, 624, prestress rod hole, 625, lateral support plate, 626, platform connecting plate, 627, bolt hole, 63, second bolt, 631, bolt body, 632, handle, 7, movable hinge support, 71, first hinge joint, 72, second hinge joint, 721, first mortise plate, 722, bolt hole, 723, first prestress applying plate, 724, prestress rod hole, 725, vertical stiffening plate, 726, connecting plate, 727. connecting hole 728, a lifting ring, 73, a first bolt, 74, a mounting plate, 741, a mounting plate main body, 742, a connecting hole, 743, a lifting ring, 75, a split bolt, 8, a prestress applying rod, 9, a lateral support, 91, an H-shaped steel column, 911, a mounting hole, 912, a split bolt hole, 92, a platform connecting plate, 921, a fault-tolerant hole, 93, a stiffening rib, 94, a steel wheel, 10, a test column, 11, a test beam, 111 and a lateral support plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced by the background art, the prior art has the defects of high requirement on test conditions and high cost, and in order to solve the technical problems, the invention provides a loading device suitable for a T-shaped beam column node test and a using method thereof.
The first embodiment is as follows:
the present invention will be described in detail with reference to fig. 1 to 18, and specifically, the structure is as follows:
this embodiment provides a be applicable to experimental loading device of T font beam column node, including braced frame, fixed hinged-support 6, activity hinged-support 7, actuator 5, prestressing force application pole 8, side direction support 9 and chain block 4, braced frame includes test platform 1, pillar 2 and counter-force roof beam 3, and counter-force roof beam 3 is located 1 top of test platform to 2 formation frame construction of pillar through two intervals settings.
A plurality of chain blocks 4 are hung below the counter-force beam 3, the chain blocks 4 can be used as hoisting equipment of a loading device to flexibly move a test component and accurately control when the test beam 11 and the test column 10 are installed, the chain blocks can be used under the condition of no driving, and meanwhile, the chain blocks 4 can be accurately controlled when the test beam 11 and the test column 10 are connected, particularly under the condition of bolt connection. Bolt connection is a comparatively commonly used beam column node form, but the hole aligning of bolt hole often needs to consume a large amount of time during the connection, causes the concatenation inefficiency, and it is difficult exactly that hoisting equipment's micro-manipulation is because of it. The chain block 4 is used for replacing a travelling crane for hoisting, so that the condition of no travelling crane is met, the micro operation is easier, and the connection efficiency of the test beam 11 and the test column 10 is improved.
In this embodiment, the number of the chain blocks 4 is four, and the chain blocks are a first chain block 41, a second chain block 42, a third chain block 43, and a fourth chain block 44, respectively, where the first chain block 41 and the second chain block 42 are used to adjust the position of the movable hinge support 7, and the third chain block 43 and the fourth chain block 44 are used to hoist the test column 10 and the test beam 11. An actuator 5 is further arranged below the counter-force beam 3, and the actuator 5 is used for applying vertical load to the beam end. The actuator 5 is adjacent one side of the pillar 2 and in use the actuator 5 is connected to one end of the test beam 11.
The upper surface of the test platform 1 is provided with a detachable fixed hinge support 6 and a lateral support 9, the lateral support 9 is close to the upright column 2 on one side, the fixed hinge support 6 is close to the upright column 2 on the other side, and the distance between the fixed hinge support 6 and the lateral support 9 is related to the length of the test beam 11. The movable hinged support 7 is arranged on the upright post 2 close to one side of the fixed hinged support 6 and is positioned above the fixed hinged support 6, and the movable hinged support 7 can move along the upright post 2 to adjust the position of the movable hinged support. During testing, the testing column 10 is arranged between the movable hinged support 7 and the fixed hinged support 6, and a plurality of prestress applying rods 8 are symmetrically arranged between the movable hinged support 7 and the fixed hinged support 6.
Further, as shown in fig. 3, the fixed hinge support 6 includes a third hinge portion 61 and a fourth hinge portion 62, and the third hinge portion 61 and the fourth hinge portion 62 are connected by a second pin 63. As shown in fig. 10, the second latch 63 is composed of a latch main body 631 and a handle 632, and the handle 632 is installed at an end of the latch main body 631, so that the quick and accurate insertion and extraction are facilitated, and the efficient connection is realized. The plug body 631 has a cylindrical shape with an abrupt diameter, and includes a small-diameter section in the middle for bearing the axial force of the test column 10 and large-diameter sections at both ends for restricting the position of the second plug 63.
As shown in fig. 4-6, the third hinge portion 61 is composed of a tenon plate 611 and a column end connecting plate 613, the tenon plate 611 is fixed on one side of the column end connecting plate 613, a pin hole 612 is formed in the tenon plate 611, and the diameter of the pin hole 612 is larger than the diameter of the second pin 63. Four bolt holes 614 are opened on the column end connecting plate 613 for bolting with the test column 10.
As shown in fig. 7-9, the fourth hinge part 62 includes a second fourth-joint plate 621, a second prestress applying plate 623, a vertical support plate 625 and a platform connecting plate 626, which are connected in sequence, the second fourth-joint plate 621 is provided with a pin hole 622, and the diameter of the pin hole 622 is larger than the diameter of the pin main body 631 and is the same as the diameter of the pin hole 612 on the tenon plate 611 of the third hinge part 61. Six prestressed bar holes 624 are formed in the second prestressed application plate 623, and the hole diameters of the prestressed bar holes 624 are larger than those of the prestressed application bars 8 and are uniformly distributed on both sides of the second prestressed application plate 631. The vertical support plate 625 increases the out-of-plane stiffness of the second pre-stress applying plate 623 on the one hand, and also provides a working surface for the application of pre-stress, facilitating the use of a torque wrench on the other hand. Four bolt holes 327 are opened on the platform connecting plate 626, and are used for fixing the fixed hinge support 6 on the test platform 1.
As shown in fig. 11, the living hinge support 7 includes a first hinge portion 71, a second hinge portion 72, a first latch 73, a mounting plate 74, and a split bolt 75. The first hinge part 71 and the second hinge part 72 are hinged together by a first pin 73, the second hinge part 72 is connected to a mounting plate 74 by a split bolt 75, and the living hinge support 7 is connected to the upright 2 by a space formed between the mounting plate 74 and the second hinge part 72. The first hinge portion 71 has the same structure as the third hinge portion 61, and is not described herein again.
As shown in fig. 12-15, the second hinge part 72 is composed of a first mortise plate 721, a first prestress applying plate 723, a vertical stiffening plate 725 and a connecting plate 726, the first prestress applying plate 723 is connected to the side of the first mortise plate 721, the first prestress applying plate 723 is vertically connected to the connecting plate 726, the vertical stiffening plate 725 is installed between the first prestress applying plate 723 and the connecting plate 726, and the vertical stiffening plate 725 increases the out-of-plane stiffness of the first prestress applying plate 723.
The first mortise plate 721 is provided with a pin hole 722, and the diameter of the pin hole 722 is larger than the diameter of the first pin 73. Six prestressed rod holes 724 are formed in the first prestressed applying plate 723, and the hole diameters of the prestressed rod holes 724 are larger than those of the prestressed applying rods 8 and are uniformly distributed on two sides of the first prestressed applying plate 723. The connecting plate 726 is provided with four connecting holes 727 for connecting with the mounting plate 74 through the split bolts 75. Meanwhile, the connecting plate 726 has two hanging rings 728 for hanging the second hinge portion 72 and adjusting the height thereof, so as to facilitate the rapid installation of the test column 10.
The mounting plate 74 includes a mounting plate main body 741, and the mounting plate main body 741 has four coupling holes 742 for coupling with the second hinge portion 72 via the tie bolts 75. Meanwhile, two hanging rings 743 are arranged on the side face of the mounting plate main body 741 and used for hoisting the mounting plate 74 and adjusting the height of the mounting plate 74, so that the test column can be mounted quickly. The split bolt is used to connect the second hinge portion 72 with the mounting plate 74 to ensure that the living hinge support 7 has the freedom to slide axially along the column 2 while limiting the freedom to move axially along the reaction beam 3.
The prestress application rod 8 is used to apply an axial pressure to the test column 10 to simulate an axial pressure ratio in an actual project. The prestress-applying rod 8 is axially disposed along the test column 10, passing through the second hinge 72 of the movable hinge support 7 and the fourth hinge 62 of the fixed hinge support 6. The torque is applied to the prestress applying rod 8 through the torque wrench, and the strain of the prestress applying rod is monitored in real time in the applying process to control the tension value of the prestress applying rod until the design value is met. The use of the pre-stressing applying rod 8 replaces a jack and the application of the test column pressure is achieved without adding additional space occupation and equipment.
As shown in fig. 16-18, there are two lateral supports 9, and the lateral supports 9 provide lateral restraint for the test beam 11, and do not interfere with the vertical counter force of the test beam 11 while ensuring that the test beam 11 does not suffer from out-of-plane instability. The lateral support 9 comprises an H-shaped steel column 91, a stiffening rib 93, a platform connecting plate 92 and a steel wheel 94, wherein the platform connecting plate 92 is installed at one end of the H-shaped steel column 91, and the stiffening rib 93 is connected between the platform connecting plate 92 and the H-shaped steel column 91 and used for increasing the lateral stiffness of the lateral support 9. And a steel wheel 94 is arranged on one side of the H-shaped steel column 91, and the installation position of the steel wheel 94 is adjustable. The steel wheel 94 has less friction on the lateral support plate 111 of the test beam 11 and has little effect on the test results.
Further, a plurality of mounting holes 911 are formed in the flange of the H-shaped steel column 91 so as to adjust the vertical height of the steel wheel 94, and the H-shaped steel column is suitable for the test columns 10 and the load types with different heights. Meanwhile, a plurality of split bolt holes 912 are formed in the flange of the H-shaped steel column 91, so that when the rigidity of the lateral supports 9 is insufficient, the two lateral supports 9 are tensioned by the split bolts to increase the rigidity. Four fault-tolerant holes 921 are opened on the platform connecting plate 92 for connecting with the test platform 1 through bolts. As shown in fig. 18, the fault-tolerant holes 921 are strip-shaped holes, so that the lateral supports 9 have enough adjustment space to adapt to different test beams and the deviation of the test beams caused by machining errors.
The use method of the test loading device in the embodiment comprises the following steps:
step (1), installing a test column 10:
1) the third hinge part 61 of the fixed hinge support 6 and the first hinge part 71 of the movable hinge support 7 are removed and are respectively connected with the end parts of the test column 10 through bolts.
2) The test column 10 is hoisted to the hinge support through the third chain block 43, and the position of the test column 10 is finely adjusted, so that the tenon plate 611 of the third hinge part 61 below the test column is inserted into the second mortise plate 621 of the fourth hinge part 62. The bolt holes 612 of the second mortise plate 621 are overlapped by adjusting the position of the test column 10, and then the second bolt 63 is inserted to complete the connection of the fixed hinge support 6.
3) The position of the movable hinge support 7 is adjusted by the first chain block 41 and the second chain block 42, so that the tenon plate of the first hinge part 71 of the movable hinge support 7 above the test column 10 is inserted between the first mortise plates 721 of the second hinge parts 72. The height of the movable hinged support 7 is adjusted to enable the mortice plate and the bolt hole 722 of the first mortise plate 721 to be overlapped, and then the first bolt 73 is inserted to complete the connection of the movable hinged support 7.
Step (2), installing a test beam 11: the test beam 11 is hoisted to the installation position through the third chain block 43 and the fourth chain block 44, and the test beam 11 is quickly and efficiently connected with the test column 10 by utilizing the fine adjustment of the chain blocks.
Step (3), installing a lateral support 9: one of them side direction supports 9 keeps the position unchangeable in the experimentation, and another side direction supports 9 need carry out the dismouting when changing the test piece, and unchangeable side direction support 9 in position generally is located the inconvenient direction of hoist and mount. After the test beam 11 and the test column 10 are installed, the lateral supports 9 are moved to the positions, a reasonable position is found by adjusting the distance between the two lateral supports 9, and the two lateral supports are fixed on the test platform 1 through bolts. The proper position is that the steel wheel 94 on the lateral support 9 just abuts the lateral support plate 111 on the test beam 11 and the steel wheel 94 is free to rotate.
Step (4) applying pressure to the test column: after the lateral support 9 is fixed, axial pressure is applied to the test column 10 to simulate the actual working condition. The pre-stressed application rod 8 is passed through the pre-stressed rod hole 724 on the second hinge 72 and the pre-stressed rod hole 624 on the fourth hinge 62 in that order. The prestress application rod 8 is temporarily screwed after the rod is penetrated, then a torque wrench is used for applying a tensile force to the prestress application rod 8, and a strain value of the prestress application rod 8 needs to be read in real time in the process of applying the tensile force. And when the strain of the prestress applying rod 8 reaches the axial compression ratio required by the test, stopping applying the tensile force to the prestress applying rod.
And (5) limiting the freedom degree of the movable hinged support 7: when the prestress reaches the tensile force required by the test, the mounting plate 74 and the connecting plate 726 of the movable hinge support 7 are screwed by using the counter bolts 75.
And (6) starting the actuator 5 to start the test.
The method is simple and easy to implement, and the test can be completed by two persons, so that the test under low conditions and low cost is realized.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A loading device suitable for a T-shaped beam column node test is characterized by comprising a supporting frame, wherein a fixed hinged support is installed on the supporting frame, a movable hinged support which is connected with one side of the supporting frame in a sliding mode is arranged above the fixed hinged support, and a plurality of prestress applying rods for applying axial pressure are symmetrically installed between the movable hinged support and the fixed hinged support;
a plurality of chain blocks for hoisting the test columns and the test beams or adjusting the positions of the movable hinged supports are arranged above the movable hinged supports, and an actuator is arranged on one side of each chain block; two lateral supports for supporting the test beam are arranged at a set distance from the fixed hinge support.
2. The loading device for the T-shaped beam-column joint test according to claim 1, wherein the lateral support comprises an H-shaped steel column, a platform connecting plate mounted at one end of the H-shaped steel column, and a reinforcing rib is connected between the platform connecting plate and the H-shaped steel column;
and a steel wheel is arranged on one side of the H-shaped steel column, the mounting position of the steel wheel is adjustable, and the steel wheel can be contacted with a lateral support plate on the test beam.
3. The loading device for the T-shaped beam-column joint test according to claim 2, wherein a plurality of split bolt holes are formed in the flange of the H-shaped steel column, and a plurality of fault-tolerant holes are formed in the end portion of the platform connecting plate.
4. The loading device for the T-shaped beam-column joint test is characterized in that the movable hinged support comprises a first hinged part and a second hinged part which are hinged together, the second hinged part is connected with the mounting plate through a split bolt, and the movable hinged support is connected with the supporting frame through a space formed between the mounting plate and the second hinged part; and a hanging ring is arranged on the mounting plate.
5. The loading device suitable for the T-shaped beam-column joint test is characterized in that the second hinge part comprises a first mortise plate connected with the first hinge part, the side surface of the first mortise plate is connected with a first prestress applying plate, the first prestress applying plate is vertically connected with a connecting plate, and a vertical stiffening plate is arranged between the first prestress applying plate and the connecting plate; and a lifting ring is arranged on the connecting plate.
6. The loading device suitable for the T-shaped beam-column joint test is characterized in that the fixed hinged support comprises a third hinged part and a fourth hinged part, and the third hinged part and the fourth hinged part are connected through a second bolt; the second bolt comprises a bolt main body with a variable diameter and a handle arranged at one end of the main body.
7. The loading device for the T-shaped beam-column joint test is characterized in that the supporting frame comprises a test platform, supporting columns are symmetrically arranged above the test platform, and the supporting columns are connected through a counterforce beam.
8. The loading device suitable for the T-shaped beam column joint test is characterized in that the chain block is arranged below the counter-force beam, and the actuator is connected with the counter-force beam; the movable hinged support is arranged on the support.
9. The use method of the loading device suitable for the T-shaped beam column joint test is characterized by comprising the following steps of:
step (1), installing a test column:
1) taking down the third hinged part of the fixed hinged support and the first hinged part of the movable hinged support, and respectively connecting the third hinged part of the fixed hinged support and the first hinged part of the movable hinged support with the end part of the test column through bolts;
2) hoisting the test column to the mounting position of the fixed hinged support through the chain block, adjusting the position of the test column to enable the third hinged part to correspond to the fourth hinged part, and inserting the second bolt into the third hinged part and the fourth hinged part;
3) the position of the movable hinged support is adjusted through the two chain blocks, so that a first hinged part and a second hinged part of the movable hinged support correspond to each other and are connected through a first bolt;
step (2), installing a test beam: hoisting the test beam to an installation position through a chain block, and realizing the connection between the test beam and the test column by utilizing the fine adjustment of the chain block;
step (3), installing a lateral support: adjusting the distance between the two lateral supports to a proper position, and fixing the lateral supports on the test platform through bolts;
step (4) applying pressure to the test column: connecting the prestress applying rod with the movable hinged support and the fixed hinged support, applying tension to the prestress applying rod by using a torque wrench, and reading a strain value of the prestress applying rod in real time; stopping applying the tensile force to the prestress applying rod when the strain of the prestress applying rod reaches the axial compression ratio required by the test;
and (5) limiting the freedom degree of the movable hinged support: after the prestress reaches the tensile force required by the test, screwing the mounting plate and the connecting plate of the movable hinged support by using a split bolt;
and (6) starting the actuator to start the test.
10. The use method of the loading device for the T-shaped beam-column joint test is characterized in that in the step (3), the steel wheels on the lateral supports are in proper positions between the lateral supports when the steel wheels just abut against the lateral support plates on the test beam and the steel wheels can rotate freely.
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| CN201911144164.0A CN110726615A (en) | 2019-11-20 | 2019-11-20 | Loading device suitable for T-shaped beam column node test and using method thereof |
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