A method for strengthening steel components against buckling

Abstract

The present invention relates to the technical field of steel member reinforcement, and in particular to a buckling-proof reinforcement method for steel members, comprising the following steps: determining the welding speed of a welding gun according to the dust concentration; using a welding gun configured with the welding speed to weld two steel plates and a plurality of stiffening ribs to form a first box-type reinforcement device and a second box-type reinforcement device; clamping the first box-type reinforcement device and the second box-type reinforcement device on two opposite sides of the steel member to determine the reinforcement position; determining the roughness evaluation parameter of the nut according to the welding speed of the welding gun and the dust concentration at the reinforcement position; determining the reversal frequency of the bolt gun according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut; using a bolt gun to connect a reinforcement rod with bolts to the first box-type reinforcement device and the second box-type reinforcement device to reinforce the steel member. The present invention improves the stability of the buckling-proof reinforcement of the steel member.

Description

Technical Field

[0001] The invention relates to the technical field of steel component reinforcement processing, and in particular to an anti-buckling reinforcement method for steel components. Background Art

[0002] In engineering practice, steel structures are widely used in industrial and civil buildings and municipal public works due to their excellent properties such as high strength, good energy dissipation capacity, easy node handling, and convenient construction. They are also often used in auxiliary facilities and structures in the construction process to support and enclose the system. In recent years, with the continuous improvement of the design and construction level of my country's engineering construction industry, the complexity of engineering structures and the complexity of construction conditions have continued to rise. Whether steel components are the main load-bearing structures or auxiliary load-bearing structures, they are facing the huge challenge of local buckling instability. The occurrence of local buckling instability may cause the components to be destroyed prematurely due to the loss of local bearing capacity, causing the overall failure of the structure and causing serious consequences. Therefore, it is necessary to develop special anti-buckling devices to reinforce the local buckling weak parts of steel components to prevent local buckling instability of steel components before reaching the material strength, causing engineering accidents and economic losses. Steel components have become prone to hidden dangers over time and due to natural disasters. Due to changes in loads, extended service life, and changes in specifications and regulations, the structural bearing capacity is insufficient. The anti-buckling reinforcement of steel components has become increasingly important. How to further improve the construction efficiency of the anti-buckling reinforcement of steel components has become an urgent problem that needs to be solved.

[0003] Chinese Patent Publication No.: CN113982301A discloses a historical building renewal structural reinforcement system, including: a beam outer steel structure, which is arranged on the outer surface of the original concrete structure beam; a column outer steel structure, which is arranged on the outer surface of the original concrete structure column; a foundation sleeve structure, which is arranged at the bottom of the column outer steel structure; a buckling restraint support, one end of which is connected to the beam outer steel structure, and the other end is connected to the foundation sleeve structure. It can be seen that the historical building renewal structural reinforcement system has the problem that the molten pool exists for a short time due to the excessively fast welding speed, and the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for dust and impurities to be evaporated or float to the surface, and are easily wrapped in the weld, thereby reducing the stability of the anti-buckling reinforcement of the steel member. Summary of the invention

[0004] To this end, the present invention provides a method for anti-buckling reinforcement of steel components, which is used to overcome the problem in the prior art that due to the too fast welding speed, the molten pool will exist for a short time, and the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for dust and impurities to be evaporated or float to the surface, and they are easily wrapped in the weld, thereby reducing the stability of the anti-buckling reinforcement of the steel component.

[0005] To achieve the above object, the present invention provides a method for reinforcing a steel member against buckling, comprising the following steps:

[0006] Collect dust concentration in welding area;

[0007] Determining a welding speed of the welding gun according to the dust concentration;

[0008] Using a welding gun configured with the welding speed, two steel plates and a plurality of stiffening ribs are welded to form a first box-shaped reinforcement device and a second box-shaped reinforcement device;

[0009] The first box-shaped reinforcement device and the second box-shaped reinforcement device are clamped on two opposite sides of the steel member to determine the reinforcement position;

[0010] Determine the roughness evaluation parameter of the nut according to the welding speed of the welding gun and the dust concentration at the reinforcement position;

[0011] Measure the actual length of the bolt gun's gun head;

[0012] Determining the reversal frequency of the bolt gun according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut;

[0013] Reinforcing rods with bolts are respectively connected to the first box-type reinforcement device and the second box-type reinforcement device using a bolt gun configured with the inversion frequency to reinforce the steel member.

[0014] Further, the step of determining the welding speed of the welding gun includes:

[0015] Comparing the dust concentration in the welding area with a preset dust concentration;

[0016] If the dust concentration in the welding area is greater than the preset dust concentration, it is determined that the interference degree of the dust on welding does not meet the requirements, and the current welding speed of the welding gun is reduced.

[0017] Furthermore, the calculation formula of the roughness evaluation parameter of the nut is:

[0018] (V×c)+C a ×β

[0019] Among them, S is the roughness evaluation parameter of the nut, V is the welding speed of the welding gun, c is the dust aroused area corresponding to the unit welding speed, C a is the dust concentration at the reinforcement position, α is the weight coefficient of the welding dust arousal area, β is the weight coefficient of the dust concentration at the reinforcement position, α+β=1.

[0020] Furthermore, the reduction range of the current welding speed of the welding gun is determined by the difference between the dust concentration in the welding area and a preset dust concentration.

[0021] Furthermore, the step of obtaining the average value of the actual length of the gun tip includes:

[0022] Use a length measuring device to measure the exposed length of the bolt gun tip several times;

[0023] summing the several measurement results;

[0024] The summation result is divided by the number of length measurements to output the average value of the actual length of the gun tip.

[0025] Further, the step of determining the reversal frequency of the bolt gun comprises:

[0026] Determining the connection performance of the position to be connected according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut;

[0027] The reversal frequency of the bolt gun is determined according to the connection performance of the position to be connected.

[0028] Furthermore, the step of determining the connection performance of the location to be connected includes:

[0029] If the average value of the actual length of the gun head is greater than or equal to the preset length and the roughness evaluation parameter of the nut is greater than or equal to the preset parameter, it is determined that the connection performance of the position to be connected meets the requirements;

[0030] If the average value of the actual length of the gun head is less than the preset length or the roughness evaluation parameter of the nut is less than the preset parameter, the reversal frequency of the bolt gun is increased.

[0031] Furthermore, the bolt gun fixes the bolts at an increased reversal frequency.

[0032] Furthermore, the reversal frequency of the bolt gun means the frequency of converting the bolt gun from forward rotation to reverse rotation when the length of the bolt gun head is less than a preset length or the average roughness parameter of the nut is less than a preset parameter.

[0033] Furthermore, the step of connecting the reinforcement rod is to determine the fixed position of the first box-type reinforcement device, use a bolt gun to fix one end of the reinforcement rod with a bolt to the bolt hole of the first box-type reinforcement device, align the bolt hole of the second box-type reinforcement device with the bolt at the other end of the reinforcement rod, and use a bolt gun to fix the connection.

[0034] Compared with the prior art, the beneficial effect of the present invention is that the present invention adjusts the welding speed of the welding gun according to the dust concentration in the welding area. Since the welding speed is too fast, the molten pool will exist for a short time and the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for the dust and impurities to evaporate or float to the surface, and they are easily wrapped in the weld. By reducing the welding speed of the welding gun, the influence of the dust in the molten pool causing welding instability is reduced, and the reversal frequency of the bolt gun is adjusted according to the average value of the actual length of the gun head and the roughness evaluation parameters of the nut. Since the head of the bolt gun will be worn after the bolt gun is used for too long, the degree of fit between the head and the position to be fitted cannot meet the requirements, resulting in a decrease in the connection effect of the bolt. By increasing the reversal frequency, the fixing stability of the bolt gun is improved, and the stability of the anti-buckling reinforcement of the steel structure is improved.

[0035] Furthermore, the method of the present invention adjusts the welding speed of the welding gun by setting a preset dust concentration. Since a too fast welding speed will cause the molten pool to exist for a short time, the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for the dust and impurities to evaporate or float to the surface, and they are easily wrapped in the weld. By reducing the welding speed of the welding gun, the influence of welding instability caused by the presence of dust in the molten pool is reduced, and the stability of the anti-buckling reinforcement of the steel structure is further improved.

[0036] Furthermore, the method of the present invention adjusts the reversal frequency of the bolt gun by setting a preset average length and preset parameters. Since the bolt gun head will be worn after being used for too long, the degree of fit between the head and the position to be fitted cannot meet the requirements, resulting in a decrease in the connection effect of the bolt. By increasing the reversal frequency, the fixing stability of the bolt gun is improved, and the stability of the anti-buckling reinforcement of the steel structure is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an overall flow chart of the buckling-resistance reinforcement method for steel members of the present invention;

[0038] Figure 2 It is a schematic diagram of the overall structure of the steel member reinforcement in the anti-buckling reinforcement method of the steel member of the present invention;

[0039] Figure 3 It is a structural top view of the first box-type reinforcement device in the anti-buckling reinforcement method of the steel member of the present invention;

[0040] Figure 4 A specific flow chart of the process of obtaining the average value of the actual length of the gun head in the buckling-resistance reinforcement method for steel members of the present invention;

[0041] The reference numerals are as follows: 1-bolt hole, 2-steel plate, 3-steel member, 4-reinforcement rod, 5-stiffening rib. DETAILED DESCRIPTION

[0042] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0044] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively an overall flow chart of the buckling-resistance reinforcement method for steel members according to an embodiment of the present invention, an overall structural schematic diagram of the steel member reinforcement, a structural top view of the first box-type reinforcement device, and a specific flow chart of the process of obtaining the average value of the actual length of the gun head. The buckling-resistance reinforcement method for steel members according to the present invention comprises:

[0046] Step S1, collecting dust concentration in the welding area;

[0047] Step S2, determining the welding speed of the welding gun according to the dust concentration;

[0048] Step S3, using a welding gun configured with the welding speed to weld two steel plates 2 and a plurality of stiffening ribs 5 to form a first box-type reinforcement device and a second box-type reinforcement device respectively;

[0049] Step S4, clamping the first box-type reinforcement device and the second box-type reinforcement device on two opposite sides of the steel member 3 to determine the reinforcement position;

[0050] Step S5, determining a roughness evaluation parameter of the nut according to the welding speed of the welding gun and the dust concentration at the reinforcement position;

[0051] Step S6, measuring the actual length of the bolt gun head;

[0052] Step S7, determining the reversal frequency of the bolt gun according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut;

[0053] Step S8 , using a bolt gun configured with the inversion frequency to connect the reinforcing rod 4 with bolts to the first box-type reinforcing device and the second box-type reinforcing device respectively to reinforce the steel member 3 .

[0054] Specifically, the first box-type reinforcement device includes:

[0055] Two steel plates 2;

[0056] A plurality of stiffening ribs 5, which are arranged between the two steel plates 2 to support the steel plates 2;

[0057] A plurality of bolt holes 1 are respectively arranged on the two steel plates 2 for fixing the reinforcing rods 4 .

[0058] In practice, the present invention adjusts the welding speed of the welding gun according to the dust concentration in the welding area. Since the welding speed is too fast, the molten pool will exist for a short time, and the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for the dust and impurities to evaporate or float to the surface, and they are easily wrapped in the weld. By reducing the welding speed of the welding gun, the influence of the dust in the molten pool causing welding instability is reduced, and the reversal frequency of the bolt gun is adjusted according to the average value of the actual length of the gun head and the roughness evaluation parameters of the nut. Since the head of the bolt gun will be worn after the bolt gun is used for too long, the degree of fit between the head and the position to be fitted cannot meet the requirements, resulting in a decrease in the connection effect of the bolt. By increasing the reversal frequency, the fixing stability of the bolt gun is improved, and the stability of the anti-buckling reinforcement of the steel component 3 is improved.

[0059] Specifically, the steps for determining the welding speed of the welding gun include:

[0060] Comparing the dust concentration in the welding area with a preset dust concentration;

[0061] If the dust concentration in the welding area is greater than the preset dust concentration, it is determined that the interference degree of the dust on welding does not meet the requirements, and the current welding speed of the welding gun is reduced.

[0062] Specifically, the calculation formula of the roughness evaluation parameter of the nut is:

[0063] (V×c)+C a ×β

[0064] Among them, S is the roughness evaluation parameter of the nut, V is the welding speed of the welding gun, c is the dust aroused area corresponding to the unit welding speed, Ca is the dust concentration at the reinforcement position, α is the weight coefficient of the welding dust arousal area, β is the weight coefficient of the dust concentration at the reinforcement position, α+β=1.

[0065] Specifically, the reduction range of the current welding speed of the welding gun is determined by the difference between the dust concentration in the welding area and the preset dust concentration.

[0066] In practice, the method of the present invention adjusts the welding speed of the welding gun by setting a preset dust concentration. Since a too fast welding speed will cause the molten pool to exist for a short time, the surrounding area cannot be fully heated and melted in time, resulting in insufficient time for the dust and impurities to evaporate or float to the surface, and they are easily wrapped in the weld. By reducing the welding speed of the welding gun, the influence of welding instability caused by the presence of dust in the molten pool is reduced, and the stability of the anti-buckling reinforcement of the steel structure is further improved.

[0067] Specifically, the step of obtaining the average value of the actual length of the gun tip includes:

[0068] Use a length measuring device to measure the exposed length of the bolt gun tip several times;

[0069] summing the several measurement results;

[0070] The summation result is divided by the number of length measurements to output the average value of the actual length of the gun tip.

[0071] Specifically, the step of determining the reversal frequency of the bolt gun includes:

[0072] Determining the connection performance of the position to be connected according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut;

[0073] The reversal frequency of the bolt gun is determined according to the connection performance of the position to be connected.

[0074] Specifically, the step of determining the connection performance of the location to be connected includes:

[0075] If the average value of the actual length of the gun head is greater than or equal to the preset length and the roughness evaluation parameter of the nut is greater than or equal to the preset parameter, it is determined that the connection performance of the position to be connected meets the requirements;

[0076] If the average value of the actual length of the gun head is less than the preset length or the roughness evaluation parameter of the nut is less than the preset parameter, the reversal frequency of the bolt gun is increased.

[0077] In practice, the method of the present invention adjusts the reversal frequency of the bolt gun by setting a preset average length and preset parameters. Since the bolt gun head will be worn after being used for too long, the degree of fit between the head and the position to be fitted cannot meet the requirements, resulting in a decrease in the connection effect of the bolt. By increasing the reversal frequency, the fixing stability of the bolt gun is improved, and the stability of the anti-buckling reinforcement of the steel structure is further improved.

[0078] Specifically, the bolt gun fastens the bolt at an increased reversal frequency.

[0079] Specifically, the reversal frequency of the bolt gun means the frequency of converting the bolt gun from forward rotation to reverse rotation when the length of the bolt gun head is less than a preset length or the roughness average parameter of the nut is less than a preset parameter. Specifically, the step of connecting the reinforcing rod 4 is to determine the fixed position of the first box-type reinforcing device, use a bolt gun to fix one end of the reinforcing rod 4 with a bolt to the bolt hole 1 of the first box-type reinforcing device, align the bolt hole 1 of the second box-type reinforcing device with the bolt at the other end of the reinforcing rod 4, and use a bolt gun to fix the connection.

[0080] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for reinforcing a steel member against buckling, characterized in that: The following steps are involved: Collect dust concentration in welding area; Determining a welding speed of the welding gun according to the dust concentration; Using a welding gun configured with the welding speed, two steel plates and a plurality of stiffening ribs are welded to form a first box-shaped reinforcement device and a second box-shaped reinforcement device; The first box-shaped reinforcement device and the second box-shaped reinforcement device are clamped on two opposite sides of the steel member to determine the reinforcement position; Determine the roughness evaluation parameter of the nut according to the welding speed of the welding gun and the dust concentration at the reinforcement position; Measure the actual length of the bolt gun's gun head; Determining the reversal frequency of the bolt gun according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut; Using a bolt gun configured with the reversal frequency, respectively connecting reinforcing rods with bolts to the first box-type reinforcement device and the second box-type reinforcement device to reinforce the steel member; The steps to determine the welding speed of the welding gun include: Comparing the dust concentration in the welding area with a preset dust concentration; If the dust concentration in the welding area is greater than the preset dust concentration, it is determined that the interference degree of the dust on welding does not meet the requirements, and the current welding speed of the welding gun is reduced; The reduction range of the current welding speed of the welding gun is determined by the difference between the dust concentration in the welding area and the preset dust concentration; The step of obtaining the average value of the actual length of the gun tip comprises: Use a length measuring device to measure the exposed length of the bolt gun tip several times; summing the results of the several measurements; Dividing the summed result by the number of length measurements to output an average value of the actual length of the gun tip; The step of determining the reversal frequency of the bolt gun comprises: Determining the connection performance of the position to be connected according to the average value of the actual length of the gun head and the roughness evaluation parameter of the nut; The reversal frequency of the bolt gun is determined according to the connection performance of the position to be connected.

2. The buckling-resistance reinforcement method for steel members according to claim 1, characterized in that: The step of determining the connection performance of the location to be connected comprises: If the average value of the actual length of the gun head is greater than or equal to the preset length and the roughness evaluation parameter of the nut is greater than or equal to the preset parameter, it is determined that the connection performance of the position to be connected meets the requirements; If the average value of the actual length of the gun head is less than the preset length or the roughness evaluation parameter of the nut is less than the preset parameter, the reversal frequency of the bolt gun is increased.

3. The buckling-resistance reinforcement method for steel members according to claim 2, characterized in that: The bolt gun fastens the bolt at an increased reversal frequency.

4. The buckling-resistance reinforcement method for a steel member according to claim 3, characterized in that: The reversal frequency of the bolt gun means the frequency of converting the bolt gun from forward rotation to reverse rotation when the length of the bolt gun head is less than a preset length or the average roughness parameter of the nut is less than a preset parameter.

5. The buckling-resistance reinforcement method for a steel member according to claim 4, characterized in that: The steps for connecting the reinforcement rod are to determine the fixed position of the first box-type reinforcement device, use a bolt gun to fix one end of the reinforcement rod with a bolt to the bolt hole of the first box-type reinforcement device, align the bolt hole of the second box-type reinforcement device with the bolt at the other end of the reinforcement rod, and use a bolt gun to fix the connection.

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