CN112663851A - Single-layer chord support latticed shell structure and anti-seismic performance testing method - Google Patents
Single-layer chord support latticed shell structure and anti-seismic performance testing method Download PDFInfo
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- CN112663851A CN112663851A CN202110223577.9A CN202110223577A CN112663851A CN 112663851 A CN112663851 A CN 112663851A CN 202110223577 A CN202110223577 A CN 202110223577A CN 112663851 A CN112663851 A CN 112663851A
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- 239000002356 single layer Substances 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000011056 performance test Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
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Abstract
The invention discloses a single-layer chord-supported latticed shell structure and an anti-seismic performance testing method, which comprises a single-layer latticed shell main body, a first-stage radial inhaul cable, a side truss and an inner truss, wherein the lower part of the single-layer latticed shell main body is provided with the side truss, the upper part of the side truss is fixedly connected with a main supporting rod and an auxiliary supporting rod, the inner part of the single-layer latticed shell main body is provided with the first-stage radial inhaul cable, the upper part of the first-stage radial inhaul cable is provided with a first-stage circumferential inhaul cable, the top of the single-layer latticed shell main body is provided with the inner truss, the inner part of the inner truss is provided with a second-stage radial inhaul cable, the upper parts of the second-stage radial inhaul cable are provided with the second-stage circumferential inhaul cable, the upper parts of, the integral rigidity of the single-layer reticulated shell main body can be increased, and the internal force of the structure is reduced.
Description
Technical Field
The invention relates to the technical field of single-layer latticed shells, in particular to a single-layer chord support latticed shell structure and an anti-seismic performance testing method.
Background
With the increasing demand of building space, various novel and unique span space structures are realized, a single-layer spherical reticulated shell structure has the characteristics of weak out-of-plane rigidity, the bearing capacity is controlled by utilizing the stability, and the structural strength cannot be fully exerted, a cable dome structure and the single-layer spherical reticulated shell are combined to form a space hybrid structure, and the reticulated shell structure has the characteristics of various structural forms, complex stress and large node number, and the horizontal seismic action and the vertical seismic action are important for the reticulated shell structure, so the seismic performance of different high-rise structures and flat-plate reticulated shell structures is determined by the characteristics of the reticulated shell, the seismic performance of the traditional single-layer reticulated shell structure is poor, the overall strength is low, the bearing capacity of the reticulated shell is reduced, and the horizontal counter force of the single-layer reticulated shell is increased.
Disclosure of Invention
The invention aims to provide a single-layer chord support latticed shell structure and an anti-seismic performance testing method, and aims to solve the problems that the traditional single-layer latticed shell structure is poor in anti-seismic performance and low in overall strength, the bearing capacity of a latticed shell is reduced, and the horizontal counter force of the single-layer latticed shell is increased.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an individual layer string props up latticed shell structure and anti-seismic performance test method, includes individual layer latticed shell main part, the radial cable of one-level, one-level hoop cable, side truss and interior truss, the lower part of individual layer latticed shell main part is equipped with the side truss, the upper portion fixedly connected with main tributary vaulting pole and the auxiliary stay pole of side truss, the inside of individual layer latticed shell main part is equipped with the radial cable of one-level, and the upper portion of the radial cable of one-level is equipped with the one-level hoop cable, the top of individual layer latticed shell main part is equipped with interior truss, the inside of interior truss is equipped with the radial cable of second grade, and the upper portion of the radial cable of second grade is equipped with second grade hoop cable, the upper.
Preferably, the edge truss is tightly connected with the vibrating table through a special bolt for the vibrating table, and the edge truss can be installed and fixed on the upper part of the vibrating table.
Preferably, the number of the main spine guys is 6, the main spine guys are semicircular, and the main spine guys can be used for transmitting power.
Preferably, the first-stage radial inhaul cable, the second-stage radial inhaul cable, the first-stage circumferential inhaul cable and the second-stage circumferential inhaul cable are connected with the side truss and the inner truss through bolts, and the connection strength between the side truss and the inner truss can be improved.
Preferably, the test method comprises:
(1) and a stress sensor and a vibration amplitude sensor are arranged on the upper part of the intersection of the first-stage radial stay cable, the second-stage radial stay cable, the first-stage circumferential stay cable and the second-stage circumferential stay cable.
(2) And comparing the whole structure under the action of vertical load, and analyzing the influence of each component of the latticed shell on the mechanical property of the whole structure.
(3) Since non-linear buckling is accompanied by large deformations of the structure and may already be out of range of elastic deformations, it is necessary to make corrections to the material model, taking into account their elasto-plastic effects.
(4) And testing the acting force of the upper part of the inner truss, judging whether the inner truss can increase the structural strength of the single-layer reticulated shell, and comparing the data without the inner truss and the data with the inner truss.
Compared with the prior art, the invention has the beneficial effects that: the invention can greatly reduce the horizontal counter force between the side truss and the main spine inhaul cable by utilizing the side truss, leads the acting force on the upper part of the side truss to tend to be uniform, has smaller action on the vertical counter force of the support, can increase the integral rigidity of the single-layer reticulated shell main body, is integrated with the structural integral by utilizing the rigidity, has uniform action on the horizontal counter force of each support, can reduce the displacement of the single-layer reticulated shell main body structure by utilizing the inner truss, shows that the inner truss can play a dividing structural form and a force transmission action, can improve the rigidity of the structure by utilizing the first-stage circumferential inhaul cable, the first-stage radial inhaul cable, the second-stage radial inhaul cable and the second-stage circumferential inhaul cable, reduces the structural internal force and improves.
Drawings
Fig. 1 is a schematic front view of the present invention.
FIG. 2 is a schematic top view of the present invention.
FIG. 3 is a schematic view of the structure of the vibration table of the present invention.
In the figure: 1-single-layer latticed shell main body, 2-side truss, 3-inner truss, 4-first-stage circumferential inhaul cable, 5-first-stage radial inhaul cable, 6-second-stage radial inhaul cable, 7-second-stage circumferential inhaul cable, 8-main supporting rod, 9-auxiliary supporting rod, 10-main spine inhaul cable and 11-vibration table.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the embodiment of the invention, a single-layer lattice shell structure and an anti-seismic performance testing method are provided, the single-layer lattice shell structure comprises a single-layer lattice shell main body 1, a first-stage radial guy cable 5, a first-stage circumferential guy cable 4, a side truss 2 and an inner truss 3, the side truss 2 is arranged at the lower part of the single-layer lattice shell main body 1, the strength of the whole single-layer lattice shell structure can be improved by using the side truss 2, a main support rod 8 and an auxiliary support rod 9 are fixedly connected to the upper part of the side truss 2, the main support rod 8 and the auxiliary support rod 9 can support and fix the side truss 2, the first-stage radial guy cable 5 is arranged inside the single-layer lattice shell main body 1, the first-stage radial guy cable 5 can improve the longitudinal acting force of the side truss 2, the first-stage circumferential guy cable 4 is arranged at the upper, inner truss 3 can play the effect of cutting apart structural style and transmission, inner truss 3's inside is equipped with the radial cable 6 of second grade, and the radial cable 6 of second grade can improve inner truss 3's longitudinal force, and the upper portion of the radial cable 6 of second grade is equipped with second grade hoop cable 7, and second grade hoop cable 7 can improve inner truss 3's transverse force, the upper portion of side truss 2 and inner truss 5 is connected with main spine cable 10, and main spine cable 10 is main power transmission component, has the effect of transmission effect, the sub-unit connection of main tributary vaulting pole 8 and auxiliary stay 9 has shaking table 11, utilizes shaking table 11 can make individual layer cell-shell main part 1 produce certain vibration.
The side truss 2 is tightly connected with the vibrating table 11 through a special bolt for the vibrating table, and the side truss 2 can be installed and fixed on the upper part of the vibrating table 11.
The number of the main spine guy cables 10 is 6, the main spine guy cables 10 are semicircular, and the main spine guy cables 10 can achieve the effect of power transmission.
The one-level radial guy cable 5, the second-level radial guy cable 6, the one-level circumferential guy cable 4 and the second-level circumferential guy cable 7 are connected with the side truss 2 and the inner truss 3 through bolts, and the connection strength between the side truss 2 and the inner truss 3 can be improved.
The test method comprises the following steps:
(1) and a stress sensor and a vibration amplitude sensor are arranged on the upper part of the intersection of the first-stage radial stay cable, the second-stage radial stay cable, the first-stage circumferential stay cable and the second-stage circumferential stay cable.
(2) And comparing the whole structure under the action of vertical load, and analyzing the influence of each component of the latticed shell on the mechanical property of the whole structure.
(3) Since non-linear buckling is accompanied by large deformations of the structure and may already be out of range of elastic deformations, it is necessary to make corrections to the material model, taking into account their elasto-plastic effects.
(4) And testing the acting force of the upper part of the inner truss, judging whether the inner truss can increase the structural strength of the single-layer reticulated shell, and comparing the data without the inner truss and the data with the inner truss.
The working principle of the invention is as follows: the first-stage radial inhaul cables 5, the second-stage radial inhaul cables 6, the first-stage circumferential inhaul cables 4 and the second-stage circumferential inhaul cables 7 are matched with each other and form an integral structure with the single-layer reticulated shell main body 1, the mechanical characteristics of the latticed shell structure can be improved through the node between the first-stage radial inhaul cable 5 and the second-stage radial inhaul cable 6, the structure displacement can be increased by utilizing the side truss 2, the axial force of the radial inhaul cables is reduced, thereby greatly reducing the horizontal counter force of the upper parts of the main support rod 8 and the auxiliary support rod 9, simultaneously reducing the integral vertical rigidity of the latticed shell structure, comparing and analyzing the vertical load by sequentially removing the single-layer latticed shell main body 1 and the inner truss 3 structure, meanwhile, longitudinal load data analysis can be carried out on the structure of the edge-free truss 2, rigidity detection of the inner truss 3 and the edge truss 2 can be completed, and a homogenization effect on horizontal counter force is achieved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a test method of individual layer chord branch latticed shell structure and anti-seismic performance, includes individual layer latticed shell main part (1), one-level radial cable (5), one-level hoop cable (4), side truss (2) and inner truss (3), its characterized in that: the lower part of individual layer die shell main part (1) is equipped with side truss (2), the upper portion fixedly connected with main tributary vaulting pole (8) and auxiliary stay pole (9) of side truss (2), the inside of individual layer die shell main part (1) is equipped with one-level radial cable (5), and the upper portion of one-level radial cable (5) is equipped with one-level hoop cable (4), the top of individual layer die shell main part (1) is equipped with inner truss (3), the inside of inner truss (3) is equipped with second grade radial cable (6), and the upper portion of second grade radial cable (6) is equipped with second grade hoop cable (7), the upper portion of side truss (2) and inner truss (5) is connected with main spine cable (10), the sub-unit connection of main tributary vaulting pole (8) and auxiliary stay pole (9) has shaking table (11).
2. The single-layer chord support latticed shell structure and the seismic performance test method according to claim 1, wherein the single-layer chord support latticed shell structure comprises the following steps: the side truss (2) is tightly connected with the vibration table (11) through a special bolt of the vibration table.
3. The single-layer chord support latticed shell structure and the seismic performance test method according to claim 1, wherein the single-layer chord support latticed shell structure comprises the following steps: the number of the main ridge inhaul cables (10) is 6, and the main ridge inhaul cables (10) are semicircular.
4. The single-layer chord support latticed shell structure and the seismic performance test method according to claim 1, wherein the single-layer chord support latticed shell structure comprises the following steps: the first-stage radial inhaul cable (5), the second-stage radial inhaul cable (6), the first-stage circumferential inhaul cable (4) and the second-stage circumferential inhaul cable (7) are connected with the side truss (2) and the inner truss (3) through bolts.
5. The single-layer chord support latticed shell structure and the seismic performance test method according to claim 1, wherein the single-layer chord support latticed shell structure comprises the following steps: the test method comprises the following steps:
(1) and a stress sensor and a vibration amplitude sensor are arranged on the upper part of the intersection of the first-stage radial stay cable, the second-stage radial stay cable, the first-stage circumferential stay cable and the second-stage circumferential stay cable.
And 6, (2) comparing the integral structure under the action of vertical load, and analyzing the influence of each component of the latticed shell on the integral mechanical property of the structure.
(3) since non-linear buckling is accompanied by large deformations of the structure and may have exceeded the range of elastic deformations, it is necessary to make corrections to the material model, taking into account their elasto-plastic effects.
And 8, (4) testing the acting force of the upper part of the inner truss, judging whether the inner truss can increase the structural strength of the single-layer latticed shell, and comparing the data without the inner truss and the data with the inner truss.
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| CN202110223577.9A CN112663851A (en) | 2021-03-01 | 2021-03-01 | Single-layer chord support latticed shell structure and anti-seismic performance testing method |
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| CN202110223577.9A CN112663851A (en) | 2021-03-01 | 2021-03-01 | Single-layer chord support latticed shell structure and anti-seismic performance testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113536646A (en) * | 2021-08-12 | 2021-10-22 | 西南交通大学 | Single-layer spherical shell earthquake failure load calculation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113536646A (en) * | 2021-08-12 | 2021-10-22 | 西南交通大学 | Single-layer spherical shell earthquake failure load calculation method |
| CN113536646B (en) * | 2021-08-12 | 2022-03-08 | 西南交通大学 | Single-layer spherical shell earthquake failure load calculation method |
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Application publication date: 20210416 |