A method of enhancing the wind uplift resistance of a metal roof panel

Abstract

The application discloses a method for enhancing the wind lifting resistance of a metal roof panel, and comprises the following steps: performing finite element simulation analysis on a roof structure, and obtaining analysis results of the roof structure; forming a roof keel structure through on-site construction, and performing dynamic testing on the roof structure keel structure to obtain testing results; comparing and analyzing the testing parameters with the simulation parameters to obtain comparison and analysis results; and determining a reinforcing range for the roof keel structure according to the comparison and analysis results. Compared with a traditional roof structure, the method does not have a further reinforcing mode after the roof structure is built, and mainly reinforces the metal roof panel, so that the wind lifting resistance of the metal roof panel is improved, and the probability of wind lifting of the roof panel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a method for enhancing the wind resistance of a metal roof panel. BACKGROUND

[0002] With the acceleration of urbanization and the increasing material and cultural needs of people, people need some large sports venues for collective activities. Due to the light weight, beauty and many other advantages of large-span space structures, they are widely used in various venues. However, due to the low overall structural stiffness of large-span structures, the vertical vibration response is large, and the wind resistance of the metal roof panel is insufficient. The wind resistance of the metal roof panel in some major buildings in China is poor, and the phenomenon of roof panel wind lifting often occurs. SUMMARY

[0003] The main purpose of the present application is to provide a method for enhancing the wind resistance of a metal roof panel, which aims to solve the problem of poor wind resistance of the metal roof panel.

[0004] To achieve the above purpose, the present application provides a method for enhancing the wind resistance of a metal roof panel, comprising the following steps:

[0005] Performing finite element simulation analysis on the roof structure and obtaining the analysis results of the roof structure;

[0006] Forming a roof keel structure by constructing on site and performing dynamic testing on the roof structure keel structure to obtain the test results;

[0007] Comparing and analyzing the test parameters and the simulation parameters to obtain the comparative analysis results;

[0008] Determining the reinforcement range of the roof keel structure according to the comparative analysis results.

[0009] Preferably, the finite element simulation analysis on the roof structure and the analysis results of the roof structure comprise the following steps:

[0010] Analyzing the first, second and third order modes of the roof structure;

[0011] According to the simulation analysis results, the vibration frequencies and modes corresponding to the first, second and third order modes are obtained.

[0012] Preferably, the roof keel structure is formed by constructing a metal roof panel, and the test results are obtained by testing the roof keel structure, comprising the following steps:

[0013] Performing dynamic data testing on the roof keel structure to obtain the collected data;

[0014] Modal analysis is performed on the collected data using modal analysis software;

[0015] Based on the results of modal analysis, the vibration frequency of the roof structure is obtained, and the corresponding structural mode shape is output according to the vibration frequency.

[0016] Preferably, determining the reinforcement range of the roof joist structure based on the comparative analysis results includes the following steps:

[0017] The reinforcement boundary area is determined based on the comparative analysis results.

[0018] Self-tapping screws are used to reinforce the first three main vibration boundaries of the reinforced area;

[0019] Increase the spacing between the retaining steel plate and the rigid connection point of the main structure at the boundary of the first three main vibration patterns of the reinforced area;

[0020] The metal roof panels are positioned and installed using a positioning device.

[0021] Preferably, the relative height difference of the metal roof panels is between 1mm and 10mm.

[0022] Preferably, the positioning device includes a first support plate, a second support plate, a movable connector, and a ranging component. One end of the first support plate is connected to one end of the second support plate through the movable connector. The ranging component is adjustablely disposed on the surface of the first support plate or the second support plate, and the ranging component is adjustable along a direction perpendicular to the movable connector.

[0023] Preferably, both the first support plate and the second support plate include a front plate, a rear plate, and a telescopic member. The telescopic member is disposed between the front plate and the rear plate, with one end of the telescopic member connected to the front plate and the other end connected to the rear plate. An opening is provided on the surface of the front plate for the probe of the ranging assembly to extend out.

[0024] Preferably, the ranging component includes a laser probe and a slide rail. The slide rail is disposed on the rear plate and is arranged in a direction perpendicular to the movable connector. The laser probe is slidably disposed on the slide rail and extends from the opening.

[0025] Preferably, the ranging assembly further includes a movable rod, one end of which passes through the rear plate and is connected to the laser probe, and the other end is located on the outside of the rear plate.

[0026] Preferably, the movable connector includes a rotating hinge, one side of which is connected to one end of the first support plate, and the other side of which is connected to one end of the second support plate.

[0027] The technical scheme of the present application simulates and analyzes the roof structure to be built by finite element analysis software, obtains simulation parameters, then tests the built roof structure, obtains test parameters, then compares the test parameters with the simulation parameters, and obtains the area of the roof structure that needs to be reinforced according to the comparison and analysis results, and finally reinforces the area that needs to be reinforced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0029] Figure 1 The flow chart of the method for enhancing the wind lifting resistance of the metal roof panel provided for the first embodiment of the present application;

[0030] Figure 2 The flow chart of another method for enhancing the wind lifting resistance of the metal roof panel provided for the present application;

[0031] Figure 3 The flow chart of still another method for enhancing the wind lifting resistance of the metal roof panel provided for the present application;

[0032] Figure 4 The flow chart of still another method for enhancing the wind lifting resistance of the metal roof panel provided for the present application;

[0033] Figure 5 The schematic diagram of the positioning device in the method for enhancing the wind lifting resistance of the metal roof panel provided for the present application;

[0034] Figure 6 The schematic diagram of the first order vibration mode of the structure in the method for enhancing the wind lifting resistance of the metal roof panel provided for the present application.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] Reference Name Reference Name 1 First support plate 3 Rotary hinge 2 Second support plate 4 Slide rail 21 Rear plate body 5 Laser probe 22 Front plate body 6 Moving rod 23 Telescopic member

[0037] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0039] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0040] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0041] Figure 1 The flowchart of the method for enhancing the wind lifting resistance of the metal roof panel provided in the first embodiment of the present application is as follows, Figure 1 The method provided in the embodiment can include the following steps:

[0042] S100, performing finite element simulation analysis on the roof structure, and obtaining analysis results of the roof structure.

[0043] The finite element analysis software is used to simulate and analyze the roof structure to be built, so as to obtain the analysis results of the roof structure. The simulation parameters reflect the vibration performance index of the roof structure, which facilitates the reinforcement of the built roof structure. In addition, the finite element analysis software used is mainly software in the direction of building structure, for example, PKPM, 3D3S, MTS, ANSYS, etc.

[0044] S200, forming a roof keel structure through on-site construction, and performing dynamic testing on the roof structure keel structure, and obtaining testing results.

[0045] After the simulation analysis of the roof batten structure, the roof structure is built by the metal batten roof panel, after the completion of the roof structure building, the dynamic test is carried out on the roof structure, and the test result of the roof batten structure is obtained, so as to compare with the analysis result.

[0046] S300, the test parameters are compared and analyzed with the simulation parameters, and the comparison analysis result is obtained.

[0047] S400, according to the comparison analysis result, the reinforcing range of the roof batten structure is determined.

[0048] After the test result of the roof structure is obtained, the test result is compared with the analysis result, and the area of the roof batten structure which needs to be reinforced is obtained according to the comparison analysis result, then the area which needs to be reinforced is reinforced, and the specific operation of how to reinforce is shown in the following embodiment.

[0049] In the technical scheme of the application, the finite element simulation analysis is carried out on the roof structure to be built by the finite element analysis software, and the analysis result is obtained, then the dynamic test is carried out on the built roof batten structure, the test result is obtained, then the test result is compared with the analysis result, and the range of the roof batten structure which needs to be reinforced is obtained according to the comparison analysis result, finally the range which needs to be reinforced is reinforced, compared with the traditional roof structure which has no further reinforcement after building, the reinforcement construction is mainly carried out on the metal roof panel, the wind lifting resistance of the metal roof panel is improved, and the probability of wind lifting of the roof panel is reduced.

[0050] Figure 2 Another method flow chart for enhancing the wind lifting resistance of the metal roof panel is provided in the application, and the embodiment is based on the above-mentioned embodiment, the simulation analysis of the roof structure and the simulation parameters of the roof structure include the following steps:

[0051] S101, analyzing the first order mode, the second order mode and the third order mode of the roof structure;

[0052] S102, according to the simulation analysis result, the vibration frequency and mode corresponding to the first order mode, the second order mode and the third order mode are obtained.

[0053] 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 order vibration modes of the roof structure are simulated and analyzed, that is, the first order vibration mode, the second order vibration mode and the third order vibration mode of the roof structure, according to the simulation analysis result, the vibration frequency and the vibration mode of the first order vibration mode, the second order vibration mode and the third order vibration mode are obtained, so that the test parameters can be compared with the subsequent test analysis when the roof structure is built, so as to obtain the reinforcement area which needs to be reinforced. In order to facilitate the understanding of the above-mentioned parameters of the first order vibration mode, the second order vibration mode and the third order vibration mode, the following table 1 is taken as an example for description.

[0054] Mode number Vibration frequency (HZ) Vibration period (s) 1 2.156. 0.4638 2 2.8239 0.3541 3 3.5372 0.2827

[0055] Table 1

[0056] Figure 3 A flow chart of another method for enhancing the wind lifting resistance of a metal roof panel is provided in the present application, and the embodiment is based on the above-mentioned embodiment, and the roof keel structure is formed by the metal roof panel, and the roof keel structure is tested to obtain the test results, including the following steps:

[0057] S201, data acquisition is performed on the roof keel structure to obtain acquisition data;

[0058] S202, modal analysis is performed on the acquisition data based on modal analysis software;

[0059] S203, according to the results of modal analysis, the vibration frequency of the roof structure is obtained, and the corresponding structure vibration mode is output according to the vibration frequency.

[0060] After the roof keel structure is built, data acquisition is performed on the roof keel structure, and the acquisition data obtained is analyzed by modal analysis software, and then the vibration frequency of the roof keel structure is obtained according to the results of modal analysis, and then the corresponding vibration mode is output according to the vibration frequency, so as to facilitate the comparison of the corresponding vibration mode with the vibration mode of the above-mentioned embodiment, and to obtain the reinforcement area which needs to be reinforced. In addition, the determination method of the vibration frequency adopts the frequency domain method and the time domain method, which is specifically shown in table 2.

[0061]

[0062] Table 2

[0063] As shown in Table 2, by comparing the described vibration mode with the frequency of the simulated vibration mode in Table 1, the reinforcement area needing reinforcement is determined, for example, the frequency of the first order vibration mode in Table 2 is between 1.950 and 1.974, and the vibration frequency in Table 1 is 2.156, so that the difference between the analysis result and the actual measurement result is within 10%, the analysis result is reliable, and the vibration mode obtained by analysis can be reinforced.

[0064] Figure 4 Another method flow chart for enhancing the wind lifting resistance of the metal roof panel is provided in the application, and the embodiment is based on the above-mentioned embodiment. According to the comparative analysis result, the reinforcing range of the roof batten structure is determined, which comprises the following steps:

[0065] S301, determining the reinforcing boundary area according to the comparative analysis result;

[0066] S302, reinforcing the self-tapping screws at the boundary of the first three order main array vibration modes of the reinforcing area;

[0067] S303, increasing the spacing of the rigid connection points between the surrounding steel plates and the main structure at the boundary of the first three order main array vibration modes of the reinforcing area;

[0068] S304, positioning and installing the metal roof panel by the positioning device.

[0069] After the comparative analysis result is obtained by comparing the test result with the simulation parameter, the reinforcing area needing reinforcement is determined according to the comparative analysis result, then the self-tapping screws at the boundary of the first three order main array vibration modes of the reinforcing area are reinforced, the construction effect of the wind lifting resistance of the roof aluminum plate is improved by increasing the fixed points of the aluminum plate along the edge and the fixed points of the self-tapping screws, then the spacing of the rigid connection points between the surrounding steel plates and the main structure at the boundary of the first three order main array vibration modes of the reinforcing area is increased, so as to improve the ductility in the vibration deformation process and avoid the vibration damage caused by the pure rigid connection, finally the metal roof is positioned and installed by the positioning device, so as to reinforce the roof structure and further improve the wind lifting resistance of the metal roof panel. In addition, the flatness of the metal roof panel should be strictly controlled during the reinforcement process, the relative height difference of the metal roof panel is controlled within 1mm-10mm, and the installation quality of the self-tapping screws should also be strictly controlled, and the phenomenon of missing nails and false nails should be strictly prohibited.

[0070] Figure 5A schematic view of a positioning device provided by the application for a method of enhancing the wind uplift resistance of a metal roof panel, in one embodiment, the positioning device comprises a first support plate 1, a second support plate 2, a movable connecting member, and a distance measuring assembly, one end of the first support plate 1 is connected to one end of the second support plate 2 through the movable connecting member, the distance measuring assembly is adjustably arranged on the surface of the first support plate 1 or the second support plate 2, and the distance measuring assembly is adjusted along a direction perpendicular to the movable connecting member.

[0071] The positioning device is clamped between two panels, at this time the first support plate 1 and the second support plate 2 support the metal roof panel respectively, then the angle between the metal roof panels placed on the first support plate 1 and the second support plate 2 respectively is adjusted by adjusting the angle between the first support plate 1 and the second support plate 2, so as to realize the angle adjustment of the adjacent metal roof panels.

[0072] In the above embodiment, the first support plate 1 and the second support plate 2 adopt the same structure, in order to avoid repetition, the following embodiment takes the structure of the second support plate 2 as an example for description.

[0073] The second support plate 2 comprises a front plate body 22, a rear plate body 21, and an extension piece 23, the extension piece 23 is arranged between the front plate body 22 and the rear plate body 21, one end of the extension piece 23 is connected to the front plate body 22, and the other end of the extension piece 23 is connected to the rear plate body 21. It should be noted that the first support plate 1 and the second support plate 2 both adopt the front plate body 22, the rear plate body 21, and the extension piece 23 arranged therebetween, the distance between the front plate body 22 and the rear plate body 21 is changed by controlling the extension of the extension piece 23, so as to realize the adjustable distance between the adjacent metal roof panels supported on the first support plate 1 and the second support plate 2, timely correction can be realized, which is beneficial to improve the wind uplift resistance of the metal roof panel.

[0074] Specifically, the distance measuring assembly comprises a laser probe 5 and a sliding rail 4, the sliding rail 4 is arranged on the rear plate body 21, and the sliding rail 4 is arranged along a direction perpendicular to the movable connecting member, the laser probe 5 is slidably arranged on the sliding rail 4, and an opening (not shown) is arranged on the surface of the front plate body 22 of the first support plate 1 for the laser probe 5 to extend out, the opening is arranged along the sliding direction of the laser probe 5.

[0075] The distance measuring assembly further comprises 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 of the moving rod 6 is located outside the rear plate body 21.

[0076] It should be noted that when the metal roof panel is positioned and installed, the relative height difference between the two adjacent panels needs to be measured, at this time, the laser probe 5 is driven to slide on the slide rail 4 by moving the rod 6, and since the laser probe 5 extends from the opening, 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 adjust and control the relative height between the adjacent panels, so that the deviation can be adjusted in time, and the wind lifting resistance of the metal roof panel can be improved.

[0077] 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 through the rotating hinge 3, so that the first support plate 1 and the second support plate 2 can be adjusted. When the horizontal distance between the adjacent panels needs to be adjusted, since the two panels are supported by the first support plate 1 and the second support plate 2 respectively, only the horizontal distance between the first support plate 1 and the second support plate 2 needs to be adjusted, that is, the horizontal distance between the adjacent panels can be adjusted, the deviation can be corrected in time, and the wind lifting resistance of the metal roof panel can be improved.

[0078] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the inventive concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A method of enhancing the wind uplift resistance of a metal roof panel, characterized by, The method comprises the following steps: performing finite element simulation analysis on the roof structure and obtaining analysis results of the roof structure; constructing a roof keel structure through on-site construction and performing dynamic testing on the roof keel structure to obtain testing results; comparing and analyzing the testing results and the analysis results to obtain comparative analysis results; determining a reinforcement range for the roof keel structure according to the comparative analysis results; wherein the step of performing finite element simulation analysis on the roof structure and obtaining analysis results of the roof structure comprises the following steps: analyzing first-order, second-order and third-order vibration modes of the roof structure; obtaining vibration frequencies and vibration modes corresponding to the first-order, second-order and third-order vibration modes according to simulation analysis results; wherein the step of constructing a roof keel structure through on-site construction and performing dynamic testing on the roof keel structure to obtain testing results comprises the following steps: performing dynamic data testing on the roof keel structure to obtain collected data; performing modal analysis on the collected data based on modal analysis software; obtaining vibration frequencies of the roof structure according to results of the modal analysis and outputting corresponding structural vibration modes according to the vibration frequencies; wherein the step of determining a reinforcement range for the roof keel structure according to the comparative analysis results comprises the following steps: determining a reinforcement range according to the comparative analysis results; reinforcing self-tapping screws at vibration boundaries of the first-order, second-order and third-order vibration modes of the reinforcement range; increasing a distance between a surrounding steel plate and a main structure rigid connection point at the vibration boundaries of the first-order, second-order and third-order vibration modes of the reinforcement range; positioning and installing the metal roof panel through a positioning device.

2. The method of claim 1, wherein the metal roof panel is a standing seam metal roof panel. The relative height difference of the metal roof panel is between 1mm and 10mm.

3. The method of claim 1, wherein the metal roof panel is a standing seam metal roof panel. The positioning device comprises a first support plate, a second support plate, a movable connecting piece and a distance measuring assembly, one end of the first support plate is connected with one end of the second support plate through the movable connecting piece, the distance measuring assembly is adjustably arranged on a surface of the first support plate or the second support plate, and the distance measuring assembly is adjusted along a direction perpendicular to the movable connecting piece.

4. The method of claim 3, wherein the metal roof panel is a standing seam metal roof panel. The first support plate and the second support plate each comprise a front plate body, a rear plate body and an extension piece, the extension piece is arranged between the front plate body and the rear plate body, one end of the extension piece is connected with the front plate body, and the other end of the extension piece is connected with the rear plate body, and an opening is arranged on a surface of the front plate body for a probe of the distance measuring assembly to extend out.

5. The method of claim 4, wherein the metal roof panel is a standing seam metal roof panel. The distance measuring assembly comprises a laser probe and a sliding rail, the sliding rail is arranged on the rear plate body and is arranged along a direction perpendicular to the movable connecting piece, the laser probe is slidably arranged on the sliding rail and extends out from the opening.

6. The method of claim 5, wherein the metal roof panel is a standing seam metal roof panel. The distance measuring assembly further comprises a moving rod, one end of the moving rod is connected with the laser probe through the rear plate body, and the other end of the moving rod is located outside the rear plate body.

7. The method of claim 3, wherein the metal roof panel is a standing seam metal roof panel. The movable connecting piece comprises 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.

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