CN114858379A - A method for enhancing the wind resistance of metal roof panels - Google Patents

Abstract

The invention discloses a method for enhancing the wind resistance of a metal roof panel. The keel structure of the roof structure is subjected to a dynamic test to obtain a test result; the test parameters and the simulation parameters are compared and analyzed to obtain a comparison analysis result; the reinforcement range is determined for the roof keel structure according to the comparison analysis result. Compared with the traditional roof structure, the present invention has no further reinforcement method after construction, and mainly performs reinforcement construction for the metal roof panel, which improves the wind resistance of the metal roof panel and reduces the probability of the roof panel wind exposure.

Description

A method for enhancing the wind resistance of metal roof panels

technical field

The invention relates to the technical field of building construction, in particular to a method for enhancing the wind resistance of metal roof panels.

Background technique

With the acceleration of urbanization, people's growing material and cultural needs, people need some large sports venues for group gatherings. Due to its many advantages such as light weight and beautiful long-span space structure, it is widely used in major venues. However, due to the low overall structural rigidity and large vertical vibration response of large-span structures, the wind resistance of metal roof panels is insufficient. The phenomenon of panel wind exposure.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a method for enhancing the wind resistance of metal roof panels, aiming at solving the problem that the current metal roof panels have poor wind resistance.

In order to achieve the above purpose, a method for enhancing the wind resistance of a metal roof panel proposed by the present invention comprises the following steps:

Perform finite element simulation analysis on the roof structure, and obtain the analysis results of the roof structure;

The roof keel structure is formed by on-site construction, and the dynamic test is carried out on the keel structure of the roof structure, and the test results are obtained;

The test parameters and the simulation parameters are compared and analyzed to obtain a comparison and analysis result;

The reinforcement range is determined for the roof keel structure according to the comparative analysis result.

Preferably, performing finite element simulation analysis on the roof structure and obtaining the analysis result of the roof structure includes the following steps:

Analyze the first, second and third vibration modes of the roof structure;

According to the simulation analysis results, the corresponding vibration frequencies and mode shapes of the first-order, second-order and third-order modes are obtained.

Preferably, the roof keel structure is formed through the construction of metal roof panels, and the roof keel structure is tested, and obtaining the test result includes the following steps:

Carry out dynamic data test on the roof keel structure to obtain collected data;

Perform modal analysis on the collected data based on modal analysis software;

According to the results of the modal analysis, the vibration frequency of the roof structure is obtained, and the corresponding structural mode shape is output according to the vibration frequency.

Preferably, determining the reinforcement range for the roof keel structure according to the comparative analysis result includes the following steps:

Determine the reinforcement boundary area according to the comparative analysis result;

Reinforcing the self-tapping screws at the front three-order main array vibration boundary of the reinforcement area;

Increase the distance between the enclosure steel plate and the rigid connection point of the main structure at the front three-order main array vibration boundary of the reinforcement area;

The metal roof panel is positioned and installed by the positioning device.

Preferably, the relative height difference of the metal roof panels is between 1 mm and 10 mm.

Preferably, the positioning device includes a first support plate, a second support plate, a movable connecting piece and a distance measuring assembly, and one end of the first supporting plate is connected to one end of the second supporting plate through the movable connecting piece , the distance measuring assembly is adjustably arranged on the surface of the first support plate or the second support plate, and the distance measuring assembly is adjusted along the direction perpendicular to the movable connecting piece.

Preferably, both the first support plate and the second support plate include a front plate body, a rear plate body and a telescopic piece, the telescopic piece is arranged between the front plate body and the rear plate body, and One end of the telescopic piece is connected to the front plate body, the other end of the telescopic piece is connected to the rear plate body, and a surface of the front plate body is provided with a probe for the probe of the distance measuring assembly to extend. Open your mouth.

Preferably, the distance measuring assembly includes a laser probe and a slide rail, the slide rail is arranged on the rear plate body, and the slide rail is arranged along a direction perpendicular to the movable connecting piece, the laser probe It is slidably arranged on the sliding rail, and the laser probe protrudes from the opening.

Preferably, the distance measuring assembly further comprises a moving rod, one end of the moving rod is connected to the laser probe through the rear plate body, and the other end is located outside the rear plate body.

Preferably, the movable connecting piece includes a rotating hinge, one side of the rotating hinge is connected with one end of the first support plate, and the other side of the rotating hinge is connected with one end of the second support plate.

The technical scheme of the present invention simulates and analyzes the roof structure to be built through finite element analysis software, and obtains the simulation parameters, and then tests the built roof structure to obtain the test parameters, and then compares the test parameters with the simulation parameters. Compare, and according to the results of the comparative analysis, the areas that need to be reinforced in the roof structure are obtained, and finally the areas that need to be reinforced are reinforced. Compared with the traditional roof structure, there is no further reinforcement method after construction, mainly for the reinforcement of metal roof panels. The construction improves the wind resistance of the metal roof panel and reduces the probability of the roof panel wind exposure.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a flowchart of a method for enhancing the wind resistance of a metal roof panel provided by Embodiment 1 of the present invention;

2 is a flow chart of another method for enhancing the wind resistance of a metal roof panel provided by the present invention;

3 is a flow chart of another method for enhancing the wind resistance of metal roof panels provided by the present invention;

4 is a flow chart of yet another method for enhancing the wind resistance of a metal roof panel provided by the present invention;

5 is a schematic diagram of a positioning device in a method for enhancing the wind resistance of a metal roof panel provided by the present invention;

FIG. 6 is a schematic diagram of a first-order vibration shape of a structure in a method for enhancing the wind resistance of a metal roof panel provided by the present invention.

Description of reference numbers:

label name label name 1 first support plate 3 Rotary hinge 2 second support plate 4 rail twenty one rear body 5 laser probe twenty two front body 6 moving rod twenty three Telescopic parts

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain the difference between the various components in a certain posture If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, if "and/or" or "and/or" appears in the whole text, its meaning includes three parallel schemes, taking "A and/or B" as an example, including scheme A, or scheme B, or scheme A and A scheme that satisfies both B. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

FIG. 1 is a flowchart of a method for reinforced metal roof panel wind resistance provided by Embodiment 1 of the present invention. As shown in FIG. 1 , the method provided by this embodiment may include the following steps:

S100, performing finite element simulation analysis on the roof structure, and obtaining an analysis result of the roof structure.

The finite element analysis software is used to simulate and analyze the roof structure to be built to obtain the analysis result of the roof structure. The simulation parameters are the vibration performance indicators of the roof structure, which is convenient for the reinforcement of the built roof structure. In addition, the finite element analysis software used is mainly the software in the direction of building structure, such as: PKPM, 3D3S, MTS, ANSYS, etc.

S200 , forming a roof keel structure through on-site construction, and performing a dynamic test on the roof structure keel structure to obtain a test result.

After the simulation analysis of the roof keel structure, the metal keel roof panel is used to build the roof structure. After the roof structure is built, the dynamic test of the roof structure is carried out, and the test results of the roof keel structure are obtained, so that the subsequent and The above analysis results are compared.

S300, performing comparative analysis on the test parameters and the simulation parameters to obtain a comparative analysis result.

S400. Determine a reinforcement range for the roof keel structure according to the comparative analysis result.

After the roof structure is tested and the test results are obtained, the test results are compared with the analysis results, and the areas that need to be reinforced for the roof keel structure are obtained according to the comparative analysis results, and then the areas that need to be reinforced are reinforced. As for how to strengthen For the specific operation, see the following examples.

In the technical solution of the present application, the finite element analysis software is used to perform finite element simulation analysis on the roof structure to be built, and the analysis results are obtained. The test results are compared with the analysis results, and according to the results of the comparative analysis, the scope of reinforcement of the roof keel structure is obtained, and finally the scope of reinforcement needs to be reinforced. Compared with the traditional roof structure, there is no further reinforcement method after construction. The reinforcement construction is mainly aimed at the metal roof panel, which improves the wind resistance of the metal roof panel and reduces the probability of the roof panel wind exposure.

2 is a flow chart of another method for enhancing the wind resistance of metal roof panels provided by the present invention. In this embodiment, on the basis of the above-mentioned embodiments, the roof structure is simulated and analyzed, and the simulation of the roof structure is obtained. The parameters include the following steps:

S101, analyze the first-order vibration mode, the second-order vibration mode and the third-order vibration mode of the roof structure;

S102. According to the simulation analysis results, the vibration frequencies and vibration modes corresponding to the first-order mode shape, the second-order mode shape, and the third-order mode shape are obtained.

Before starting to build the roof structure, the finite element analysis software is used to simulate and analyze the roof structure to be built, and the first three vibration modes of the roof structure are simulated and analyzed, that is, the first vibration mode and the second vibration mode of the roof structure. The first-order mode shape and the third-order mode shape, according to the results of the simulation analysis, the vibration frequency and mode shape of the first-order mode shape, the second-order mode shape and the third-order mode shape are obtained, so that the roof structure can be completed in the subsequent construction. When the test analysis is performed again, the test parameters can be compared to identify the reinforcement areas that need reinforcement. In order to facilitate the understanding of the above-mentioned parameters of the first-order mode shape, the second-order mode shape and the third-order mode shape, the following table 1 is used as an example to illustrate.

modal number Vibration frequency (HZ) Vibration period (s) 1 2.156. 0.4638 2 2.8239 0.3541 3 3.5372 0.2827

Table 1

3 is a flow chart of another method for enhancing the wind resistance of metal roof panels provided by the present invention. In this embodiment, on the basis of the above-mentioned embodiments, the roof keel structure is formed by building metal roof panels, and the The roof keel structure is tested, and the test results are obtained including the following steps:

S201, performing data collection on the roof keel structure to obtain collection data;

S202, performing modal analysis on the collected data based on modal analysis software;

S203. According to the result of the modal analysis, the vibration frequency of the roof structure is obtained, and the corresponding structural mode shape is output according to the vibration frequency.

After the roof keel structure is built, the data of the roof keel structure is collected, and the acquired data is modal analysis with modal analysis software, and then the vibration frequency of the roof keel structure is obtained according to the results of the modal analysis, and then The corresponding mode shape is output according to the vibration frequency, which is convenient to compare the corresponding mode shape with the mode shape of the above-mentioned embodiment, and obtain the reinforcement area that needs to be reinforced. In addition, the frequency domain method and the time domain method are used to determine the vibration frequency, as shown in Table 2.

Table 2

As shown in Table 2, by comparing the described mode shape with the frequency of the simulated mode shape in Table 1, the reinforcement area that needs reinforcement is determined. For example, the frequency of the first-order mode shape in Table 2 is between 1.950 and 1.974, and the vibration frequency in Table 1 is 2.156, which means that the difference between the analysis results and the measured results is within 10%, the analysis results are reliable, and they can be reinforced according to the mode shapes obtained by the analysis.

FIG. 4 is a flow chart of another method for enhancing the wind resistance of metal roof panels provided by the present invention. In this embodiment, on the basis of the above-mentioned embodiments, the reinforcement of the roof keel structure is determined according to the comparative analysis results. The scope includes the following steps:

S301. Determine a reinforcement boundary area according to the comparative analysis result;

S302, reinforcing the self-tapping screws at the front three-order main formation vibration boundary of the reinforcing area;

S303, increasing the distance between the enclosure steel plate and the rigid connection point of the main structure at the front three-order vibration boundary of the main array of the reinforcement area;

S304, the metal roof panel is positioned and installed by the positioning device.

By comparing the test results with the simulation parameters, after the comparative analysis results are obtained, the reinforcement area that needs to be reinforced is determined according to the comparison analysis results, and then the self-tapping screws at the front three-order main array vibration boundary of the reinforcement area are reinforced. The fixing points along the edge of the aluminum plate and the fixing points of self-tapping nails are added to improve the construction effect of the roof aluminum plate against wind exposure, and then the enclosure steel plate at the main vibration boundary of the first three orders of the reinforcement area is rigidly connected to the main structure. In order to improve the ductility in the process of anti-vibration deformation and avoid the vibration damage caused by the pure rigid connection, the metal roof is positioned and installed by the positioning device, so as to realize the reinforcement of the roof structure and further improve the metal roof. Wind resistance of the panel. In addition, in the process of reinforcement, the flatness of the metal roof panel should be strictly controlled, and the relative height difference of the metal roof panel should be controlled within 1mm to 10mm. At the same time, the installation quality of the self-tapping screws should be strictly controlled to prevent leakage. The phenomenon of nails and fake nails.

5 is a schematic diagram of a positioning device in a method for enhancing the wind resistance of a metal roof panel provided by the present invention. In one embodiment, the positioning device includes a first support plate 1, a second support plate 2, a movable connector and A distance measuring assembly, one end of the first support plate 1 is connected with one end of the second support plate 2 through a movable connecting piece, the distance measuring assembly is adjustable on the surface of the first support plate 1 or the second support plate 2, and the measuring The distance assembly is adjusted in a direction perpendicular to the articulating member.

The positioning device is clamped between two plates, at this time the first support plate 1 and the second support plate 2 respectively support the metal roof panel, and then adjust the distance between the first support plate 1 and the second support plate 2 The angle between the metal roof panels respectively placed on the first support plate 1 and the second support plate 2 is driven to realize the angle adjustment of the adjacent metal roof panels.

In the above-mentioned embodiment, the first support plate 1 and the second support plate 2 adopt the same structure. In order to avoid repeated description, the following embodiments take the structure of the second support plate 2 as an example for description.

Each of the second support plates 2 includes a front plate body 22 , a rear plate body 21 and a telescopic piece 23 . The telescopic piece 23 is arranged between the front plate body 22 and the rear plate body 21 , and one end of the telescopic piece 23 is connected to the front plate body. 22 is connected, and the other end of the telescopic piece 23 is connected with the rear plate body 21 . It should be noted that the first support plate 1 and the second support plate 2 are both composed of a front plate body 22 , a rear plate body 21 and a telescopic piece 23 arranged between them. The distance between the plate body 22 and the rear plate body 21 can be adjusted to adjust the distance between the adjacent metal roof panels supported on the first support plate 1 and the second support plate 2, so that the deviation can be corrected in time, which is beneficial to Improve the wind resistance of metal roof panels.

Specifically, the distance measuring assembly includes a laser probe 5 and a slide rail 4. The slide rail 4 is arranged on the rear plate body 21, and the slide rail 4 is arranged along the direction perpendicular to the movable connecting piece. The laser probe 5 is slidably arranged on the slide rail 4. On the rail 4 , an opening (not shown) for extending the laser probe 5 is provided on the surface of the front plate body 22 of the first support plate 1 , and the opening direction of the opening is along the sliding direction of the laser probe 5 .

The distance measuring assembly further includes a moving rod 6 , one end of the moving rod 6 is connected to the laser probe 5 through the rear plate body 21 , and the other end is located outside the rear plate body 21 .

It should be noted that when positioning and installing the metal roof panel, it is necessary to measure the relative height difference between the two adjacent panels. At this time, the laser probe 5 is driven to slide on the slide rail 4 by moving the rod 6. Because The laser probe 5 protrudes from the opening, so that the metal roof panel can be measured, and then the relative height difference between the two adjacent panels is measured according to the sliding distance of the laser probe 5, so as to realize the adjustment and control between the adjacent panels. The relative height of the metal roof can be adjusted in time, which is beneficial to improve the ability of the metal roof panel to resist wind exposure.

In one embodiment, the movable connecting piece includes a rotating hinge 3 , one side of the rotating hinge 3 is connected with one end of the first support plate 1 , and the other side of the rotating hinge 3 is connected with one end of the second support plate 2 . It should be noted that the first support plate 1 and the second support plate 2 are connected by rotating hinges 3, so that the first support plate 1 and the second support plate 2 can be adjusted. When adjusting the horizontal distance between the two plates, since the two boards are supported by the first support plate 1 and the second support plate 2 respectively, it is only necessary to adjust the horizontal distance between the first support plate 1 and the second support plate 2, that is, It can realize the adjustment of the spacing between the horizontal adjacent panels, and realize the timely correction, which is beneficial to improve the wind resistance of the metal roof panel.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, any equivalent structural transformations made by the contents of the description and drawings of the present invention, or direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A method for enhancing wind uncovering resistance of a metal roof panel is characterized by comprising the following steps:

carrying out finite element simulation analysis on the roof structure and obtaining an analysis result of the roof structure;

constructing and forming a roof keel structure through site construction, and carrying out dynamic test on the roof keel structure to obtain a test result;

comparing and analyzing the test parameters and the simulation parameters to obtain a comparison and analysis result;

and determining a reinforcing range for the roof keel structure according to the comparative analysis result.

2. A method for enhancing the wind lift resistance of a metal roofing panel according to claim 1, wherein said performing a finite element simulation analysis of the roofing structure and obtaining an analysis of the roofing structure comprises the steps of:

analyzing a first-order vibration mode, a second-order vibration mode and a third-order vibration mode of the roof structure;

and obtaining the vibration frequency and the vibration mode corresponding to the first-order vibration mode, the second-order vibration mode and the third-order vibration mode according to the simulation analysis result.

3. A method of enhancing the wind lift resistance of a metal roof panel according to claim 1, wherein said forming a roof keel structure from said metal roof panel construction and testing said roof keel structure to obtain test results comprises the steps of:

carrying out dynamic data test on the roof keel structure to obtain collected data;

performing modal analysis on the acquired data based on modal analysis software;

and obtaining the vibration frequency of the roof structure according to the result of the modal analysis, and outputting a corresponding structure vibration mode according to the vibration frequency.

4. A method of enhancing the wind uplift resistance of a metal roof panel according to claim 1, wherein the determining a reinforcement range for the roof keel structure based on the comparative analysis comprises the steps of:

determining a reinforced boundary area according to the comparative analysis result;

reinforcing the self-tapping screw at the main array type vibration boundary of the first three stages of the reinforced area;

increasing the distance between the enclosure steel plate at the main array type vibration boundary of the first three stages of the reinforced area and the rigid connection point of the main structure;

and positioning and installing the metal roof panel through a positioning device.

5. A method of enhancing the wind uplift resistance of a metal roofing panel according to claim 4, wherein the metal roofing panel has a relative height difference of between 1mm and 10 mm.

6. The method of enhancing the wind lift resistance of a metal roof panel of claim 4, wherein the positioning device includes a first support plate, a second support plate, a moveable connector, and a distance measuring assembly, wherein one end of the first support plate is connected to one end of the second support plate via the moveable connector, wherein the distance measuring assembly is adjustably positioned on a surface of the first support plate or the second support plate, and wherein the distance measuring assembly is adjustable in a direction perpendicular to the moveable connector.

7. The method of enhancing the wind uncovering resistance of a metal roof panel according to claim 6, wherein each of the first support plate and the second support plate comprises a front panel body, a rear panel body, and a telescoping member, the telescoping member is disposed between the front panel body and the rear panel body, one end of the telescoping member is connected to the front panel body, the other end of the telescoping member is connected to the rear panel body, and an opening for a probe of the distance measuring assembly to extend out is disposed on the surface of the front panel body.

8. The method of enhancing the wind lift resistance of a metal roof panel of claim 7, wherein said ranging assembly includes a laser probe and a slide rail, said slide rail is disposed on said rear panel body and said slide rail is disposed along a direction perpendicular to said movable connection member, said laser probe is slidably disposed on said slide rail, and said laser probe extends from said opening.

9. A method of enhancing the wind lift resistance of a metal roof panel according to claim 8, wherein said ranging assembly further includes a moving bar, one end of said moving bar passing through said rear panel to connect to said laser probe and the other end of said moving bar being located outside of said rear panel.

10. A method of enhancing the wind lift resistance of a metal roofing panel according to claim 6, wherein the movable connection includes a swivel hinge having one side connected to one end of the first support panel and another side connected to one end of the second support panel.

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