Loading Frame for Intersecting Member Joints and Its Usage Method

Abstract

The present invention relates to the technical field of joint test technology for intersecting members, and particularly relates to a loading frame for intersecting members and a using method thereof, mainly solving the technical problems of low reuse value of the existing loading frame, high requirements for the test site, narrow test range, and low test accuracy. The present loading frame includes a support assembly, a ring beam, a main loading assembly, and a swivel joint. The ring beam is fixed at the top of the support assembly. There are two sets of main loading assemblies, which are respectively located on the upper and lower sides of the ring beam. The main loading assembly includes two main arches, two sets of telescopic struts, and a number of arc beams. The two ends of the main arch are connected to the upper surface or the lower surface of the ring beam. The two ends of the telescopic strut are respectively connected to the ring beam and the main arch. The two ends of the arc beam are respectively connected to the two main arches. The swivel joint is fixed on the ring beam, the main arch, or the arc beam. The present loading frame has a high reuse value, low requirements for the test site, a wide test range, and can ensure the test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of testing techniques for intersecting nodes of members, and particularly to a loading frame for intersecting nodes of members and a using method thereof. Background Art

[0002] In the field of civil engineering, records of building height, span, overhanging length, and opening ratio are constantly being refreshed, resulting in an increasingly high degree of structural complexity. For complex structures such as large-span or long-overhanging structures, members are often arranged and connected according to certain rules to form a space grid structure, and intersecting nodes of members are formed at the intersections of members in the space grid structure. The intersecting nodes of members mainly include Figure 11 the multi-member space member intersecting node shown in Figure 12 the few-member space member intersecting node shown in Figure 13 and the planar member intersecting node shown in . Although finite element analysis can study the above-mentioned intersecting nodes of members, without the corroboration of test results, its analysis results are difficult to be convincing. Therefore, it is still necessary to use a loading frame to conduct experimental research on the intersecting nodes of members.

[0003] Existing loading frames have the following defects: First, the loading frame is a customized disposable structure, which can only be applicable to specific nodes and has low reuse value; second, the loading frame depends on the restraint balance of a reaction wall or a ground trough during the test, and has high requirements for the test site; third, the loading frame cannot realize monotonic loading or reciprocating loading of tensile force, pressure, shear force, and bending moment simultaneously, and has a narrow test range; fourth, the loading points of the loading frame do not have a continuous adjustment function, and all use the direct loading method for testing, which is prone to deviation and has low test accuracy. Summary of the Invention

[0004] In order to overcome the technical defects of the existing loading frame, such as low reuse value, high requirements for the test site, narrow test range, and low test accuracy, the present invention provides a loading frame for intersecting nodes of members and a using method thereof.

[0005] The loading frame for intersecting nodes of members provided by the present invention includes:

[0006] a supporting assembly;

[0007] a ring beam, which is fixed at the top end of the supporting assembly and has a vertical axis arrangement;

[0008] The main loading components are provided in two sets and are respectively located on the upper and lower sides of the ring beam. Each set of main loading components includes two main arches, two sets of telescopic struts and several arc-shaped beams. The two main arches are symmetrically distributed with respect to the axial section of the ring beam. Both ends of the main arch are connected to the upper surface or the lower surface of the ring beam through pivot seats so that the included angle between the main arch and the ring beam is adjustable. The pivot seats are detachably arranged. The two sets of telescopic struts are respectively arranged corresponding to the two main arches. Both ends of the telescopic strut are connected to the ring beam and the main arch through spherical hinge seats respectively. The spherical hinge seats are detachably arranged. Both ends of the arc-shaped beam are respectively detachably fixed on the two main arches and the fixing positions can be adjusted infinitely along the main arch;

[0009] The adapter is used to install the actuator and there are multiple adapters. Each adapter is fixed on the ring beam or the main arch or the arc-shaped beam and the fixing position can be adjusted infinitely along the ring beam or the main arch or the arc-shaped beam.

[0010] Optionally, the supporting component includes at least three columns, and the ring beam is detachably fixed at the top ends of all the columns.

[0011] Optionally, the ring beam is connected to the side wall at the top end of the column, and the side wall at the top end of the column is set as an arc-shaped concave surface that fits the ring beam.

[0012] Optionally, the ring beam is composed of multiple equally divided arc beam segments spliced together, and the adjacent arc beam segments are detachably connected.

[0013] Optionally, the pivot seat includes a first ear plate, a second ear plate and a pin shaft. The first ear plate is arranged at the end of the main arch, the second ear plate is arranged on the upper surface or the lower surface of the ring beam, and the pin shaft penetrates through the first ear plate and the second ear plate.

[0014] Optionally, the telescopic strut is a hydraulic rod.

[0015] Optionally, the ring beam, the main arch and the arc-shaped beam all adopt box-shaped cross-sections.

[0016] Optionally, the end of the arc-shaped beam is located on the concave side of the main arch, and the surface of the arc-shaped beam facing the main arch is set as a double-sided arc surface to fit the main arch.

[0017] Optionally, one surface of the adapter is set as a curved surface to fit the ring beam or the main arch or the arc-shaped beam, and the opposite surface is set as a flat surface to install the actuator.

[0018] The loading frame of the member intersection node provided by the present invention has the following advantages:

[0019] 1) The loading frame for the intersection node of members provided by the present invention can conduct tests on the multi-member spatial intersection node by installing a swivel joint on the arc beam. Moreover, through the adjustment of the angle of the main arch, the position and quantity of the arc beams, and the position and quantity of the swivel joints, tests on multi-member spatial intersection nodes of various different specifications can be completed. Removing the arc beam and installing a swivel joint on the main arch can conduct tests on the few-member spatial intersection node, and through the adjustment of the angle of the main arch and the position and quantity of the swivel joints, tests on few-member spatial intersection nodes of various different specifications can be completed. Removing the arc beam and the main arch and installing a swivel joint on the ring beam can conduct tests on the planar member intersection node, and through the adjustment of the position and quantity of the swivel joints, tests on planar member intersection nodes of various different specifications can be completed. Thus, this loading frame can be applicable to the experimental research of various member intersection nodes and has a high value of repeated utilization.

[0020] 2) For the loading frame for the intersection node of members provided by the present invention, since the member intersection node is placed inside the loading frame during the test, after a force is generated at a certain position, the loading frame can generate a reaction force on the support. As a result, this loading frame does not rely on the restraint balance of a reaction wall or a ground trough during the test, and only requires the test site to be flat and firm, with relatively low requirements for the test site.

[0021] 3) For the loading frame for the intersection node of members provided by the present invention, the test on the member intersection node is completed by installing an actuator on the swivel joint. The fixed position of the swivel joint on the ring beam, the main arch or the arc beam is adjustable. Therefore, by controlling the actions of the actuators located on each swivel joint, monotonic loading or reciprocating loading of tension, pressure, shear force and bending moment can be realized synchronously, and the test range is relatively wide.

[0022] 4) For the loading frame for the intersection node of members provided by the present invention, since the angle of the main arch relative to the ring beam is adjustable, and the fixed positions of the arc beam on the main arch and the swivel joint on the ring beam, the main arch or the arc beam can be adjusted steplessly, the loading points of this loading frame can be continuously adjusted, which can avoid the deviation caused by direct loading, thereby ensuring the test accuracy.

[0023] The usage method of the loading frame for the intersection node of members provided by the present invention is specifically as follows:

[0024] For the space member intersecting node, first install the first set of main loading components on the upper side of the ring beam according to the distribution of the members to form a hemispherical structure, and install the adapter and actuator on the first set of main loading components. Then turn the hemispherical structure upside down and place the node to be tested inside the hemispherical structure. Next, install the second set of main loading components on the upper side of the ring beam to form a spherical structure, and install the adapter and actuator on the second set of main loading components. Finally, test the node to be tested by controlling the action of the actuator; where: for the multi-member space member intersecting node, install the main arch and the arc beam when installing the main loading components, and install the adapter on the arc beam; for the few-member space member intersecting node, only install the main arch when installing the main loading components, and install the adapter on the main arch;

[0025] For the plane member intersecting node, first place the node to be tested inside the ring beam, then install the adapter and actuator on the ring beam, and finally test the node to be tested by controlling the action of the actuator.

[0026] The method for using the loading frame of the member intersecting node provided by the present invention has the following advantages:

[0027] The method for using the loading frame of the member intersecting node provided by the present invention can select a suitable loading frame structure according to different types of member intersecting nodes, thereby avoiding interference of redundant structures on the test, being more conducive to the operation of the test research and ensuring the accuracy of the test results. Description of the Drawings

[0028] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It shows the usage state diagram of the loading frame for the multi-member space member intersecting node test in the embodiment of the present invention;

[0031] Figure 2 It shows the usage state diagram of the loading frame for the few-member space member intersecting node test in the embodiment of the present invention;

[0032] Figure 3 It shows the usage state diagram of the loading frame for the plane member intersecting node test in the embodiment of the present invention;

[0033] Figure 4Shows the schematic structural diagram of the ring beam in the embodiment of the present invention;

[0034] Figure 5 Shows the schematic assembly diagram of the ring beam and the main arch in the embodiment of the present invention;

[0035] Figure 6 Shows Figure 5 The schematic diagram of assembling the arc beam on the basis of the shown structure;

[0036] Figure 7 Shows Figure 6 The schematic diagram of assembling the adapter on the basis of the shown structure;

[0037] Figure 8 Shows Figure 7 The schematic diagram of assembling the support assembly on the basis of the shown structure;

[0038] Figure 9 Shows Figure 8 The schematic diagram of assembling the main arch of another set of main loading components on the basis of the shown structure;

[0039] Figure 10 Shows Figure 9 The schematic diagram of assembling the arc beam of another set of main loading components on the basis of the shown structure;

[0040] Figure 11 Shows the schematic structural diagram of the multi-bar space bar intersection node;

[0041] Figure 12 Shows the schematic structural diagram of the few-bar space bar intersection node;

[0042] Figure 13 Shows the schematic structural diagram of the plane bar intersection node.

[0043] In the figure:

[0044] 1. Support assembly; 2. Ring beam; 3. Main loading component; 31. Main arch; 32. Telescopic strut; 33. Arc beam; 34. Pivoting seat; 35. Spherical hinge seat; 4. Adapter. Detailed implementation mode

[0045] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. It should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "joined" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0048] The following specifically describes the embodiments of the present invention with reference to the accompanying drawings. Embodiment

[0049] Referring to Figure 1 , this embodiment provides a loading frame for a bar intersection node, including a support assembly 1, a ring beam 2, a main loading assembly 3, and an adapter 4.

[0050] Among them, referring to Figure 1 , the support assembly 1 is supported on the ground during use and mainly serves to support the ring beam 2 and the main loading assembly 3 provided on the ring beam 2.

[0051] Specifically, the support assembly 1 includes at least three columns, and the ring beam 2 is detachably fixed to the tops of all the columns. Figure 1 As shown in , there are four columns provided, and it is also possible to set them as three or five. The support assembly 1 adopts the form of multiple columns, and the ring beam 2 is detachably fixed to the tops of the columns, so that the ring beam 2 and the support assembly 1 can be disassembled during transportation to meet the transportation size requirements. Of course, the support assembly 1 can also adopt a support block or a support plate or a support frame or other commonly used structures with a supporting function; the ring beam 2 can also be welded and fixed to the support assembly 1.

[0052] More specifically, the ring beam 2 is connected to the side wall at the top of the column, and the side wall at the top of the column is set as an arc-shaped concave surface that fits the ring beam 2. Through the arc-shaped concave surface, the ring beam 2 is closely attached to the column, so that the stability of the overall structure can be improved and the bearing capacity is stronger.

[0053] Among them, referring to Figure 1 , the ring beam 2 is fixed to the top of the support assembly 1 and its axis is arranged vertically.

[0054] Specifically, the ring beam 2 is formed by splicing multiple equally divided arc beam segments, and adjacent arc beam segments are detachably connected. Dividing the ring beam 2 into multiple arc beam segments for splicing can better meet the transportation size requirements. Of course, the ring beam 2 can also adopt an integral structure.

[0055] More specifically, Figure 1 As shown in, there are three arc beam segments. It should be noted that the more the number of arc beam segments, the lower the assembly efficiency. Therefore, in actual use, the number of arc beam segments is generally set to two or three.

[0056] More specifically, end plates are provided on the end faces of the arc beam segments, and adjacent arc beam segments are detachably connected by bolts passing through the end plates. Specifically, hand holes can be opened on the arc beam segments to facilitate the installation of bolts.

[0057] Specifically, the ring beam 2 adopts a box-shaped cross-section, which has strong load-bearing capacity and light weight. Of course, the ring beam 2 can also adopt a solid beam or other common beam structures.

[0058] Among them, referring to Figure 1 , there are two sets of main loading components 3 and they are respectively located on the upper and lower sides of the ring beam 2. Each set of main loading components 3 includes two main arches 31, two groups of telescopic struts 32 and several arc beams 33. The two main arches 31 are symmetrically distributed about the axial section of the ring beam 2. Both ends of the main arch 31 are connected to the upper surface or the lower surface of the ring beam 2 through pivot seats 34 so that the included angle between the main arch 31 and the ring beam 2 is adjustable. The pivot seats 34 are detachably arranged. The two groups of telescopic struts 32 are respectively arranged corresponding to the two main arches 31. Both ends of the telescopic strut 32 are connected to the ring beam 2 and the main arch 31 through spherical hinge seats 35 respectively. The spherical hinge seats 35 are detachably arranged. Both ends of the arc beam 33 are respectively detachably fixed on the two main arches 31 and the fixed positions can be adjusted infinitely along the main arch 31.

[0059] It is easy to understand that the detachable arrangement of the pivot seat 34 means that: the pivot seat 34 is detachably connected to the main arch 31 or the pivot seat 34 is detachably connected to the ring beam 2 or the components of the pivot seat 34 are detachably connected to each other.

[0060] Specifically, the pivot seat 34 includes a first ear plate, a second ear plate and a pin shaft. The first ear plate is arranged at the end of the main arch 31, the second ear plate is arranged on the upper surface or the lower surface of the ring beam 2, and the pin shaft passes through the first ear plate and the second ear plate. This kind of pivot seat 34 has reliable structure and is convenient for disassembly.

[0061] It should be noted that since the main function of the main arch 31 is to install the arc beam 33, the coverage range of the main arch 31 should be expanded as much as possible during design, that is, the arc length of the ring beam 2 clamped between both ends of the main arch 31 should be expanded as much as possible. Of course, since there are two main arches 31 installed on the ring beam 2, the maximum value of the arc length of the ring beam 2 clamped between both ends of the main arch 31 is half of the circumference of the ring beam 2.

[0062] It is easy to understand that the main function of the telescopic strut 32 is to drive the main arch 31 to rotate through telescoping, so as to adjust the included angle between the main arch 31 and the ring beam 2.

[0063] Specifically, the telescopic strut 32 is a hydraulic rod. Of course, the telescopic strut 32 can also adopt an electric push rod, a pneumatic push rod or a manually adjustable telescopic structure.

[0064] It should be noted that preferably two telescopic struts 32 are provided in each group. The distances between the main arch 31 and the ring beam 2 at the installation positions of the two telescopic struts 32 are equal, and the distances between the main arch 31 and the ring beam 2 at the installation positions of the two telescopic struts 32 are always equal when the main arch 31 rotates. In this way, the lengths of the two telescopic struts 32 in the same group are equal at any time, which is more conducive to ensuring the synchronization of the actions of the telescopic struts 32 in the same group, and further more conducive to ensuring the smooth rotation of the main arch 31.

[0065] It is easy to understand that the ball hinge seat 35 is detachably arranged, that is: the ball hinge seat 35 is detachably connected to the telescopic strut 32, or the ball hinge seat 35 is detachably connected to the main arch 31 / ring beam 2, or the components of the ball hinge seat 35 are detachably connected to each other.

[0066] Specifically, the arc-shaped beam 33 and the main arch 31 can be detachably fixed by a common fixing structure in the art, but two conditions need to be met at the same time: First, the arc-shaped beam 33 can be detached from the main arch 31; Second, the arc-shaped beam 33 can be adjusted infinitely along the main arch 31. For example: place a clamping plate on each of the side of the arc-shaped beam 33 away from the main arch 31 and the side of the main arch 31 away from the arc-shaped beam 33, and then pass the tie bolts through the two clamping plates at the same time, and clamp the two clamping plates through the cooperation of the tie bolts and nuts, so as to realize the relative fixation of the arc-shaped beam 33 and the main arch 31.

[0067] It is easy to understand that the fixing position of the arc-shaped beam 33 can be adjusted infinitely along the main arch 31, that is, the position of the arc-shaped beam 33 relative to the main arch 31 can be continuously adjusted, rather than the arc-shaped beam 33 can only be installed at several positions distributed at intervals on the main arch 31.

[0068] Specifically, both the main arch 31 and the arc-shaped beam 33 adopt box-shaped cross-sections, which have strong load-bearing capacity and light weight. Of course, the main arch 31 and the arc-shaped beam 33 can also adopt solid beams or other common beam structures.

[0069] More specifically, the end portions of the arc-shaped beam 33 are located on the concave side of the main arch 31, and the surface of the arc-shaped beam 33 facing the main arch 31 is provided with a double-sided arc surface to fit the main arch 31. It is easy to understand that since the arc-shaped beam 33 itself has a curvature, and the main arch 31 itself also has a curvature, and the arc-shaped beam 33 and the main arch 31 are arranged in a crosswise manner, the surface of the arc-shaped beam 33 facing the main arch 31 needs to be provided with a double-sided arc surface to respectively meet the curvature requirements of the arc-shaped beam 33 and the main arch 31, so that this surface can fit on the main arch 31. The fitting arrangement of the arc-shaped beam 33 and the main arch 31 can improve the stability of the overall structure and has a stronger load-bearing capacity.

[0070] Among them, with reference to Figures 1 to 3 , the adapter 4 is used to install the actuator and there are multiple of them. Each adapter 4 is fixed on the ring beam 2 or the main arch 31 or the arc-shaped beam 33, and the fixing position can be adjusted infinitely along the ring beam 2 or the main arch 31 or the arc-shaped beam 33.

[0071] It should be noted that the actuator is a mature structure in the art. Its function is to apply a control force to the controlled object according to a determined control law. In the field of civil engineering, an electro-hydraulic servo actuator is generally used to be able to apply relatively large static and pseudo-dynamic loads. By controlling the installation position and action state of the actuator relative to the joint of intersecting members, tensile force, compressive force, shear force or bending moment can be generated on the joint of intersecting members. When the actuator is connected to the joint of intersecting members in a posture perpendicular to the member, bending moment and shear force can be generated on the joint of intersecting members. When the actuator is connected to the member of the joint of intersecting members in a posture parallel to the member, tensile force and compressive force can be generated on the joint of intersecting members.

[0072] It is easy to understand that as Figure 1 shown, for the joint of intersecting multi-bar space members, the adapter 4 can be installed on the arc-shaped beam 33. Through the cooperation of the main arch 31 and the arc-shaped beam 33, it can meet the loading of the members in any plane within a certain range of the angle with the plane of the ring beam 2. For example, in this embodiment, the angle range is from 27° to 153°; as Figure 2 shown, for the joint of intersecting few-bar space members, the adapter 4 can be installed on the main arch 31, and it can meet the loading of the members within a certain range of the angle with the plane of the ring beam 2. For example, in this embodiment, the angle range is from 27° to 153°; as Figure 3 shown, for the joint of intersecting plane members, the adapter 4 can be installed on the ring beam 2, and it can meet the loading of the members within the 360° range in the plane of the ring beam 2. Specifically, for the joint of intersecting space members, if it itself includes the joint of intersecting plane members, then in addition to installing the adapter 4 on the main arch 31 or the arc-shaped beam 33, the adapter 4 can also be installed on the ring beam 2 to simultaneously meet the loading of the space members and the plane members. During specific implementation, the number and fixing position of the adapter 4 can be set according to the distribution of the loading points of the joint of intersecting members, which is easy for those skilled in the art to design.

[0073] Specifically, the adapter 4 can be fixed to the ring beam 2, the main arch 31 or the curved beam 33 through a commonly used fixing structure in the art, but it is necessary to enable the adapter 4 to be adjusted infinitely along the ring beam 2, the main arch 31 or the curved beam 33. For example: place a clamping plate on each of the side of the adapter 4 away from the ring beam 2, the main arch 31 or the curved beam 33 and the side of the ring beam 2, the main arch 31 or the curved beam 33 away from the adapter 4, and then penetrate the two clamping plates simultaneously through a tie bolt, and clamp the two clamping plates through the cooperation of the tie bolt and the nut, so as to realize the relative fixation of the adapter 4 and the ring beam 2, the main arch 31 or the curved beam 33; Another example is to slidably connect the adapter 4 to the inner side of the ring beam 2, the main arch 31 or the curved beam 33, and fix the adapter 4 to the ring beam 2, the main arch 31 or the curved beam 33 through a locking member when it is moved to a suitable position.

[0074] Specifically, one surface of the adapter 4 is set as a curved surface to fit the ring beam 2, the main arch 31 or the curved beam 33, and the opposite surface is set as a plane to install the actuator. It should be understood that the curved surface of the adapter 4 needs to be designed with three curvatures corresponding to the ring beam 2, the main arch 31 and the curved beam 33, so as to be adapted to the curvature and size of the ring beam 2, the main arch 31 or the curved beam 33.

[0075] Taking the case of using it in the test of the multi-bar space bar intersection node as an example, the installation process of the loading frame of the bar intersection node of this embodiment will be described in detail as follows:

[0076] 1) As Figure 4 shown, assemble the ring beam 2. There is a total of one ring beam 2, and the arc beam segments are connected to each other by end plates and bolts. Hand holes can be provided on the web of the ring beam 2 for the installation of bolts inside the ring beam 2 to ensure that the bearing capacity of the splicing joint of the ring beam 2 ≥ the bearing capacity of the ring beam 2;

[0077] 2) As Figure 5 shown, first install the telescopic strut 32 at the reserved position of the ring beam 2, then align the plate holes of the first ear plate of the main arch 31 and the second ear plate of the ring beam 2 and install the pin shaft, and finally install the strut to the reserved position of the main arch 31. The assembly of the two main arches 31 on one side of the ring beam 2 is completed;

[0078] 3) As Figure 6 shown, according to the number and position requirements of the loading points, multiple curved beams 33 can be arranged; to improve the utilization rate, each curved beam 33 should cover 2 or more loading points. The curved beam 33 is placed in place in contact with the inner flange of the main arch 31. Place clamping plates on the outer side of the main arch 31 and the inner side of the curved beam 33, and use through bolts to connect the main arch 31 and the curved beam 33 into one body to achieve reliable force transmission;

[0079] 4) As Figure 7As shown in the figure, according to the position of the loading point, the adapter 4 is installed inside the arc beam 33, the clamping plates are placed outside the arc beam 33 and inside the adapter 4, and the arc beam 33 and the adapter 4 are connected into one body by through bolts to achieve reliable force transmission;

[0080] 5) As Figure 8 shown in the figure, invert the above-mentioned partially installed loading frame and assemble it with the column. Set one side of the cross-section of the column as a concave surface and fit it to the outside of the ring beam 2, and fix it by bolt connection;

[0081] 6) As Figure 9 shown in the figure, install the two main arches 31 on the other side of the ring beam 2 in the same way as in step 2).

[0082] 7) As Figure 10 shown in the figure, install the arc beam 33 on the other side of the ring beam 2 in the same way as in step 3);

[0083] 8) As Figure 1 shown in the figure, install the adapter 4 on the other side of the ring beam 2 in the same way as in step 4).

[0084] So far, the loading frame for the multi-bar space bar intersection node is assembled. The adapter 4 of the loading frame corresponds to each bar one by one, and the actuator can be used to achieve monotonic loading or reciprocating loading of tension and pressure on each bar. If shear force, bending moment and their combined loading are required, adapters 4 can be set in the vertical direction of each bar, and the actuator can be used to achieve monotonic loading or reciprocating loading of shear force and bending moment on each bar.

[0085] It should be noted that in the design, Q390B or above grade and quality level steel is used for each component of the loading frame. According to the actual force requirements, multiple stiffeners can be set at the positions of the pivot seat 34 and the spherical hinge seat 35 on the ring beam 2; the cross-sectional area of the ring beam 2 is the largest, the cross-sectional area of the main arch 31 is smaller than that of the ring beam, and the cross-sectional area of the arc beam 33 is smaller than that of the main arch 31; to ensure the arc beam 33 fits with the main arch 31, the outer flange of the arc beam 33 should be processed into a convex surface, and its curvature in the cross-sectional direction is the same as that of the main arch. Specifically, control the deformation of each component of the loading frame ≤ 1‰ of the deformation of the corresponding bar during loading, and check and design the cross-sectional dimensions of each component of the loading frame based on this principle. Embodiment

[0086] This embodiment provides a method for using a loading frame for a bar intersection node, which is as follows:

[0087] For the space member intersection node, first install the first set of main loading components 3 on the upper side of the ring beam 2 according to the member distribution to form a hemispherical structure, and install the adapter 4 and the actuator on the first set of main loading components 3. Then turn the hemispherical structure upside down and place the node to be tested inside the hemispherical structure. Next, install the second set of main loading components on the upper side of the ring beam 2 to form a spherical structure, and install the adapter 4 and the actuator on the second set of main loading components 3. Finally, conduct tests on the node to be tested by controlling the action of the actuator; wherein: for the multi-member space member intersection node, install the main arch 31 and the arc beam 33 when installing the main loading components 3, and install the adapter 4 on the arc beam 33; for the few-member space member intersection node, only install the main arch 31 when installing the main loading components 3, and install the adapter 4 on the main arch 31;

[0088] For the plane member intersection node, first place the node to be tested inside the ring beam 2, then install the adapter 4 and the actuator on the ring beam 2, and finally conduct tests on the node to be tested by controlling the action of the actuator.

[0089] It should be noted that for the multi-member space member intersection node and the few-member space member intersection node, if the member intersection node itself includes a plane member intersection node, in addition to installing the adapter 4 on the main arch 31 or the arc beam 33, the adapter 4 can also be installed on the ring beam 2 to meet the distribution requirements of the loading points.

[0090] The above are only the specific implementation manners of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A loading frame for a node where members converge, characterized in that, Comprising: A support assembly (1); A ring beam (2) fixed at the top end of the support assembly (1) with its axis arranged vertically; Two sets of main loading assemblies (3) respectively located on the upper and lower sides of the ring beam (2). Each main loading assembly (3) includes two main arches (31), two sets of telescopic struts (32) and a number of arc beams (33). The two main arches (31) are symmetrically distributed about the axial section of the ring beam (2). Both ends of the main arch (31) are connected to the upper or lower surface of the ring beam (2) through a pivot seat (34) so that the included angle between the main arch (31) and the ring beam (2) is adjustable. The pivot seat (34) is detachably arranged. The two sets of telescopic struts (32) are respectively arranged corresponding to the two main arches (31). Both ends of the telescopic strut (32) are connected to the ring beam (2) and the main arch (31) through spherical hinge seats (35) respectively. The spherical hinge seat (35) is detachably arranged. Both ends of the arc beam (33) are detachably fixed on the two main arches (31) respectively, and the fixing positions can be adjusted infinitely along the main arch (31); A swivel joint (4) for installing an actuator and provided with a plurality of them. Each swivel joint (4) is fixed on the ring beam (2) or the main arch (31) or the arc beam (33), and the fixing position can be adjusted infinitely along the ring beam (2) or the main arch (31) or the arc beam (33).

2. The loading frame of the bar intersection node according to claim 1, characterized in that, The support assembly (1) includes at least three columns, and the ring beam (2) is detachably fixed at the top ends of all columns.

3. The loading frame of the member intersection node according to claim 2, characterized in that, The ring beam (2) is connected to the side wall at the top end of the column, and the side wall at the top end of the column is set as an arc concave surface that fits the ring beam (2).

4. The loading frame for the joint where members converge according to claim 2, characterized in that, The ring beam (2) is spliced by a plurality of equally divided arc beam segments, and adjacent arc beam segments are detachably connected.

5. The loading frame of the member intersection node according to claim 1, characterized in that, The pivot seat (34) includes a first ear plate, a second ear plate and a pin shaft. The first ear plate is arranged at the end of the main arch (31), the second ear plate is arranged on the upper or lower surface of the ring beam (2), and the pin shaft penetrates through the first ear plate and the second ear plate.

6. The loading frame of the bar intersection node according to claim 1, characterized in that, The telescopic strut (32) is a hydraulic rod.

7. The loading frame of the bar intersection node according to claim 1, characterized in that The ring beam (2), the main arch (31) and the arc beam (33) all adopt box-shaped cross-sections.

8. The loading frame for the joint where members converge according to claim 7, characterized in that, The end of the arc beam (33) is located on the concave side of the main arch (31), and the surface of the arc beam (33) facing the main arch (31) is set as a double-sided arc surface to fit the main arch (31).

9. The loading frame of the bar intersection node according to claim 1, characterized in that, One surface of the swivel joint (4) is set as a curved surface to fit the ring beam (2) or the main arch (31) or the arc beam (33), and the opposite surface is set as a flat surface to install the actuator.

10. A method for using a loading frame of a member intersection node according to any one of claims 1 to 9, characterized in that: For the spatial member intersection node, first install the first set of main loading components (3) on the upper side of the ring beam (2) according to the member distribution to form a hemispherical structure, and install the adapter (4) and the actuator on the first set of main loading components (3). Then turn the hemispherical structure upside down and place the node to be tested inside the hemispherical structure. Next, install the second set of main loading components on the upper side of the ring beam (2) to form a spherical structure, and install the adapter (4) and the actuator on the second set of main loading components (3). Finally, test the node to be tested by controlling the action of the actuator; wherein: for the multi-member spatial member intersection node, install the main arch (31) and the arc beam (33) when installing the main loading components (3), and install the adapter (4) on the arc beam (33); for the few-member spatial member intersection node, only install the main arch (31) when installing the main loading components (3), and install the adapter (4) on the main arch (31); For the planar member intersection node, first place the node to be tested inside the ring beam (2), then install the adapter (4) and the actuator on the ring beam (2), and finally test the node to be tested by controlling the action of the actuator.

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