Energy consumption plane truss structure

Abstract

The utility model provides an energy dissipation plane truss structure which comprises a truss upper chord and a truss lower chord which are arranged in parallel. The frame columns are respectively connected to the two ends of the truss upper chord and the truss lower chord; and the viscous damper is arranged at the connection position between the truss lower chord and the frame column. According to the energy dissipation plane truss structure, the lower chord, connected with the frame column, of the parallel chord truss structure is adjusted to be the viscous damper from a common component, that is, the viscous damper is arranged in the plane truss structure, under the action of an earthquake, the damper fully dissipates energy, deformation and damage of the structure under the action of the earthquake are effectively reduced, and a main body structure is protected; the horizontal floor acceleration of the structure under the earthquake action is reduced, and falling or damage of suspended ceilings, equipment and other non-structural members and equipment attached to the main body structure under the earthquake is effectively avoided; the bending moment transmitted to the frame columns by the upper and lower chords of the truss is reduced, and the requirements of strong columns and weak beams are effectively met.

Description

Technical Field

[0001] The utility model relates to the technical field of house building truss structures, in particular to an energy-consuming plane truss structure. Background Art

[0002] Parallel chord trusses are widely used in large-span roofs and floors of residential buildings due to their adaptability to large spans and strong load-bearing capacity. Existing conventional parallel chord trusses generally increase their structural seismic resistance by increasing their cross-sections to meet seismic requirements. However, because the truss stiffness is much greater than the stiffness of the frame columns at either end of the truss, the frame columns are prone to hinge formation, failing to meet the "strong column, weak beam" requirement. Furthermore, the "Technical Guidelines for Seismic Resistance Based on Maintaining the Normal Functionality of Buildings," published by the Standards and Norms Research Institute of the Ministry of Housing and Urban-Rural Development, proposes a "floor acceleration" index to protect non-structural components such as suspended ceilings, fixtures, and equipment attached to the main structure during earthquakes. However, existing conventional parallel chord trusses exhibit high structural stiffness, attracting significant seismic forces. Furthermore, their components have weak energy dissipation capacity during earthquakes, failing to effectively dissipate these forces. This results in high structural floor accelerations, making it difficult to effectively protect non-structural components such as suspended ceilings, fixtures, and equipment during earthquakes. Utility Model Content

[0003] In response to the above-mentioned deficiencies in the existing technology, the present invention provides an energy-absorbing plane truss structure, comprising: a truss upper chord and a truss lower chord arranged parallel to each other; and frame columns respectively connected to the two ends of the truss upper chord and the truss lower chord; and a viscous damper arranged at the connecting position between the truss lower chord and the frame column.

[0004] In some embodiments, the frame column includes a first frame column and a second frame column, the first frame column is connected to one end of the truss upper chord and the truss lower chord, and the second frame column is connected to the other end of the truss upper chord and the truss lower chord.

[0005] In some embodiments, the viscous damper includes at least a first viscous damper and a second viscous damper, wherein the first viscous damper is disposed between the first frame column and the lower chord of the truss, and the second viscous damper is disposed between the second frame column and the lower chord of the truss.

[0006] In some embodiments, the first viscous damper is hinged to the first frame column and the lower chord of the truss, and the second viscous damper is hinged to the second frame and the lower chord of the truss.

[0007] In some embodiments, a first viscous damper connecting section is provided on the first frame column, one end of the first viscous damper is connected to the first viscous damper connecting section via a hinged connection, and the other end is connected to the lower chord of the truss via a hinged connection.

[0008] In some embodiments, a second viscous damper connecting section is provided on the second frame column, one end of the second viscous damper is connected to the second viscous damper connecting section via a hinged connection, and the other end is connected to the lower chord of the truss via a hinged connection.

[0009] In some embodiments, a plurality of truss webs are provided between the truss upper chord and the truss lower chord that are arranged parallel to each other, and the plurality of truss webs are respectively connected to the truss upper chord and the truss lower chord, and each of the truss webs is arranged at an angle to the truss upper chord and the truss lower chord, and each of the truss webs is also arranged at an angle to each other.

[0010] The utility model has the following beneficial effects:

[0011] The energy-absorbing plane truss structure provided by the present invention adjusts the lower chord connecting the parallel chord truss structure and the frame column from an ordinary component to a viscous damper, that is, the viscous damper is arranged in the plane truss structure. Under the action of an earthquake, the damper fully dissipates energy, effectively reduces the deformation and damage of the structure under the action of an earthquake, and protects the main structure; reduces the horizontal floor acceleration of the structure under the action of an earthquake, and effectively prevents non-structural components and equipment such as suspended ceilings and equipment attached to the main structure from falling or being damaged under an earthquake; reduces the bending moment transmitted to the frame column by the upper and lower chords of the truss, and effectively realizes the requirement of "strong column and weak beam". BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of an energy-dissipating plane truss structure shown in an embodiment of the present utility model;

[0013] Figure 2 A simplified calculation diagram of an existing parallel chord truss and an energy-dissipating plane truss shown in an embodiment of the present utility model;

[0014] Figure 3 The structural vertex displacement time history curves of the existing parallel chord truss and the energy dissipation plane truss shown in the embodiment of the utility model;

[0015] Figure 4 A comparison diagram of the structural vertex displacement time history curves of the existing parallel chord truss and the energy dissipation plane truss shown in the embodiment of the utility model;

[0016] Figure 5 The structural floor acceleration time history curves of the existing parallel chord truss and the energy dissipation plane truss shown in the embodiment of the utility model are shown;

[0017] Figure 6 A comparison diagram of the floor acceleration time history curves of the existing parallel chord truss and the energy dissipation plane truss shown in the embodiment of the utility model;

[0018] Figure 7The frame column bending moment diagrams of the existing parallel chord truss and the energy dissipation plane truss shown in the embodiment of the utility model are shown;

[0019] Wherein, the reference numerals:

[0020] 1-Truss upper chord;

[0021] 2- Truss bottom chord;

[0022] 301-first frame column;

[0023] 302-second frame column;

[0024] 401-first viscous damper;

[0025] 402-second viscous damper;

[0026] 5- first viscous damper connecting section;

[0027] 6- articulated connection;

[0028] 7-Second viscous damper connecting section;

[0029] 8- Truss web. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0031] Certain words are used in the specification and subsequent claims to refer to specific components or parts. A person of ordinary skill in the art should understand that technical users or manufacturers may refer to the same component or part with different nouns or terms. This specification and the subsequent claims do not use differences in names as a way to distinguish components or parts, but rather use differences in the functions of components or parts as the criteria for distinction. The words "including" and "comprising" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connect" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0032] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and "approximately", or "approximately", "substantially", "left and right" and the like to indicate directions or positional relationships or parameters are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the device or element referred to must have a specific direction, specific size or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] See Figure 1 This embodiment provides an energy-absorbing plane truss structure, comprising: a truss upper chord 1 and a truss lower chord 2 arranged parallel to each other; and frame columns respectively connected to both ends of the truss upper chord 1 and the truss lower chord 2; and a viscous damper arranged at the connecting position between the truss lower chord and the frame column.

[0034] The frame column includes a first frame column 301 and a second frame column 302, the first frame column 301 is connected to one end of the truss upper chord 1 and the truss lower chord 2, and the second frame column 302 is connected to the other end of the truss upper chord 1 and the truss lower chord 2.

[0035] Specifically, there are two viscous dampers, namely a first viscous damper 401 and a second viscous damper 402. The first viscous damper 401 is arranged between the first frame column 301 and the lower chord 2 of the truss, and the second viscous damper 402 is arranged between the second frame column 302 and the lower chord 2 of the truss.

[0036] The first viscous damper 401 , the first frame column 301 , and the truss lower chord 2 are all hinged, and the second viscous damper 402 , the second frame 302 , and the truss lower chord 2 are all hinged.

[0037] Specifically, a first viscous damper connecting section 5 is provided on the first frame column 301, one end of the first viscous damper 401 is connected to the first viscous damper connecting section 5 through a hinged connection 6, and the other end is connected to the lower chord 2 of the truss through a hinged connection 6; a second viscous damper connecting section 7 is provided on the second frame column 302, one end of the second viscous damper 402 is connected to the second viscous damper connecting section 7 through a hinged connection 6, and the other end is connected to the lower chord 2 of the truss through a hinged connection 6.

[0038] In this embodiment, a plurality of truss webs 8 are provided between the truss upper chord 1 and the truss lower chord 2 which are arranged parallel to each other. The plurality of truss webs 8 are respectively connected to the truss upper chord 1 and the truss lower chord 2. Each of the truss webs 8 is arranged at an angle to the truss upper chord 1 and the truss lower chord 2, and each of the truss webs 8 is also arranged at an angle to each other.

[0039] In this embodiment, viscous dampers are placed at the ends of the lower chord truss where they connect to the frame columns. These dampers are hinged to both the frame columns and the truss. Under earthquake action, the structural components at either end of the viscous damper experience inconsistent displacements and velocities, causing the damper to generate force and deformation, resulting in hysteretic energy dissipation. This hysteretic energy dissipation effectively reduces seismic loads on the main structure, thereby protecting the main structure and associated ancillary equipment.

[0040] Furthermore, in order to study the seismic performance of the energy-absorbing plane truss, the present invention takes a certain truss as the research object. The cross-section, span, seismic action and other parameters of the existing parallel chord truss and the energy-absorbing plane truss of this embodiment are consistent. The calculation diagram is shown in FIG. Figure 2 As shown in the figure, earthquake motion is selected for time history calculation, and the seismic performance of the energy-absorbing truss is explained by comparing the relevant seismic response index results of the existing parallel chord truss and the energy-absorbing plane truss.

[0041] Further comparative analysis of the results is as follows:

[0042] (1) Structural deformation and inter-story displacement angle

[0043] Structural deformation and inter-story displacement angle are important indicators for measuring the seismic performance of a structure. The smaller the value, the stronger the structure's lateral resistance and the better the seismic performance. Extract the vertex time history curve of the structure, and the result is as follows: Figure 3 As shown, the two vertex time course curves are overlapped and compared, and the results are as follows Figure 4 As shown, it can be found that compared with the traditional truss, the vertex time history of the energy dissipation plane truss provided by this embodiment is greatly reduced, indicating that the deformation of the truss structure under earthquake is effectively controlled through the energy dissipation effect of the damper.

[0044] The vertex displacements of the structure were extracted, and the inter-story drift angles were calculated. The results are shown in the table below. It can be seen that the maximum deformation of the existing parallel-chord truss is 1.63 times that of the energy-dissipating truss. This demonstrates that the energy-dissipating truss of this embodiment can significantly reduce structural deformation and improve its seismic performance.

[0045]

[0046] (2) Structural floor acceleration

[0047] Structural floor acceleration is an indicator that measures the protection performance of the main structure for non-structural components such as ceilings, devices and equipment attached to the main structure. The smaller the value, the better the protection effect of the structure on non-structural components. The time history curves of the structural floor acceleration of the two models are extracted, and the results are as follows: Figure 5 As shown, the two floor acceleration time history curves are overlapped and compared, and the results are as follows Figure 6 As shown, the maximum acceleration of the existing parallel chord truss floor is 639cm / s 2 , and the maximum acceleration of the energy-absorbing plane truss is 273 cm / s 2 The maximum floor acceleration of existing parallel chord trusses is 2.34 times that of this embodiment. This indicates that the energy-dissipating plane trusses of this embodiment can significantly reduce structural floor acceleration during earthquakes, effectively protecting non-structural components such as suspended ceilings, devices, and equipment, and reducing damage to these non-structural components during earthquakes, resulting in high economic benefits.

[0048] (3) Frame column bending moment

[0049] "Strong columns and weak beams" is an important principle in structural design. Under earthquake action, the smaller the bending moment transmitted from the truss to the frame column, the more the "strong columns and weak beams" effect can be achieved. The bending moment diagrams of the frame columns of the two structures are extracted, and the results are as follows: Figure 7 As shown, the maximum bending moment at the intersection of the lower chord and column for conventional parallel-chord trusses is 201.9, and the maximum bending moment at the column base is 294.4. However, the corresponding values ​​for the energy-dissipating truss of this embodiment are 44.1 and 57.13, respectively, which are only 21.8% and 19.4% of those of conventional trusses. This demonstrates that the energy-dissipating truss of this embodiment effectively achieves the "strong column, weak beam" effect, effectively improving the structural ductility during earthquakes.

[0050] The above comparative analysis shows that compared with the traditional parallel chord truss structure, the energy-dissipating truss structure of this embodiment has good lateral resistance performance, can effectively achieve the requirement of "strong columns and weak beams", and can effectively reduce the acceleration of the floor under earthquakes, protect non-structural components such as suspended ceilings, devices and equipment, reduce damage to related non-structural components under earthquakes, and have higher economic benefits.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An energy-dissipating plane truss structure, characterized in that: include: A truss upper chord and a truss lower chord arranged parallel to each other; and frame columns connected to both ends of the truss upper chord and the truss lower chord respectively; The viscous damper is arranged at the connection position between the lower chord of the truss and the frame column.

2. The energy dissipation plane truss structure according to claim 1, characterized in that: The frame column includes a first frame column and a second frame column, the first frame column is connected to one end of the truss upper chord and the truss lower chord, and the second frame column is connected to the other end of the truss upper chord and the truss lower chord.

3. The energy dissipation plane truss structure according to claim 2, characterized in that: The viscous damper includes at least a first viscous damper and a second viscous damper, wherein the first viscous damper is disposed between the first frame column and the lower chord of the truss, and the second viscous damper is disposed between the second frame column and the lower chord of the truss.

4. The energy dissipation plane truss structure according to claim 3, characterized in that: The first viscous damper is hinged to the first frame column and the lower chord of the truss, and the second viscous damper is hinged to the second frame and the lower chord of the truss.

5. The energy dissipation plane truss structure according to claim 4, characterized in that: A first viscous damper connecting section is provided on the first frame column. One end of the first viscous damper is connected to the first viscous damper connecting section through a hinged connection member, and the other end is connected to the lower chord of the truss through a hinged connection member.

6. The energy dissipation plane truss structure according to claim 4, characterized in that: A second viscous damper connecting section is provided on the second frame column. One end of the second viscous damper is connected to the second viscous damper connecting section through a hinged connection member, and the other end is connected to the lower chord of the truss through a hinged connection member.

7. The energy dissipation plane truss structure according to claim 1, characterized in that: A plurality of truss webs are provided between the truss upper chord and the truss lower chord which are arranged in parallel with each other. The plurality of truss webs are respectively connected to the truss upper chord and the truss lower chord. Each of the truss webs is arranged at an angle to the truss upper chord and the truss lower chord, and each of the truss webs is also arranged at an angle to each other.

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