A corrugated explosion-proof firewall and its construction method

Abstract

The present invention provides a corrugated explosion-resistant firewall, which is sequentially provided with a support frame, a deformation support layer, and a corrugated plate from the explosion-back surface to the explosion-facing surface. At least one support member is provided in the deformation support layer, and both ends of the support member are respectively connected to the support frame and the corrugated plate. A surrounding frame is provided around the deformation support layer and the corrugated plate, one end of the surrounding frame is connected to the support frame, and the other end of the surrounding frame is connected to the corrugated plate. The present invention further provides a construction method for the corrugated explosion-resistant firewall. The corrugated explosion-resistant firewall and its construction method provided by the present invention can effectively reduce the load transmitted to the main building structure while ensuring the structural strength of the explosion-resistant firewall, block the propagation of explosion flames, ensure the safety of the overall building structure, and protect the lives of the people inside the building.

Description

Technical Field

[0001] The invention belongs to the technical field of explosion-proof engineering, and relates to a corrugated explosion-proof fire wall and a construction method thereof, and specifically relates to a corrugated composite steel plate explosion-proof fire wall capable of absorbing shock wave energy and a construction method thereof. Background Art

[0002] The energy and chemical industries have always been areas where explosion disasters frequently occur. As the country has increased its attention to production safety in recent years, how to protect the lives of workers in the event of fire and explosion accidents has become a top priority in structural design.

[0003] Generally speaking, the wall of a building (especially the infill wall) has a poor ability to resist lateral loads and is the part that is most severely damaged by explosions. Beams and columns, as the main load-bearing components, have a much stronger ability to resist lateral impacts. The main purpose of an explosion-proof wall is to serve as a barrier between the wall of a building and the explosion source. When an explosion occurs, the explosion-proof wall is affected by the shock wave before the wall itself and transfers the load to other structures, thereby protecting the more fragile wall.

[0004] At present, the application of corrugated steel plate explosion-proof wall is very extensive. The explosion-proof wall is to fix the corrugated steel plate on the support frame on its back, and the support frame is rigidly connected to the main beams and columns of the building. The advantage of this explosion-proof wall is that the section modulus of the corrugated steel plate is much larger than that of the flat plate, so its bending stiffness and lateral bearing capacity are greatly improved under the same plate thickness, which can protect the wall structure (such as the filling wall) behind the explosion-proof wall from being destroyed by the explosion load. However, due to the increase in stiffness and decrease in displacement of the explosion-proof wall, the explosion energy it receives is almost completely transferred to the main structure of the building, which is not conducive to the main structure and increases the risk of overall failure of the building. For example, in a certain explosion-proof renovation project, the original building is a reinforced concrete frame structure and the wall is an ordinary masonry filling wall. In the initial calculation, the main structure frame of the original building can still remain intact under the action of the explosion load, but the filling wall is seriously damaged. After the explosion-proof renovation, the explosion-proof surface is covered with a corrugated steel plate explosion-proof wall as a whole, and the explosion-proof wall is supported on the main structure frame. In further calculations, due to the protection of the explosion-proof wall, the filling wall was intact, but the main structure was overstressed and damaged. This example shows that the traditional corrugated steel plate explosion-proof wall only transfers the explosion force on the local wall structure to the main beam-column structure, which increases the risk of failure of the main structure while protecting the local structure. In addition, since the explosion-proof plate is directly fixed to the main structure through the support frame, there is almost no space for filling fireproof materials, so the currently commonly used corrugated steel plate explosion-proof wall does not have a fireproof function, and fire and explosion often occur together. Explosion-proof alone cannot meet the safety requirements in most cases. Summary of the invention

[0005] In view of the above-mentioned disadvantages of the prior art, the object of the present invention is to provide a corrugated explosion-proof firewall and a construction method thereof. The constructed corrugated explosion-proof firewall has both explosion-proof and fire-proof functions. While ensuring the structural strength of the explosion-proof firewall, it effectively reduces the load transmitted to the main building structure and can block the propagation of explosion flames, thereby ensuring the safety of the overall structure and protecting the lives of the people inside the building.

[0006] To achieve the above object and other related objects, in a first aspect of the present invention, there is provided a corrugated explosion-proof firewall, which is provided with a support frame, a deformation support layer, and a corrugated plate in sequence from the back explosion surface to the front explosion surface direction. At least one support member is provided in the deformation support layer, and both ends of the support member are respectively connected to the support frame and the corrugated plate. A surrounding frame is provided around the deformation support layer and the corrugated plate, one end of the surrounding frame is connected to the support frame, and the other end of the surrounding frame is connected to the corrugated plate.

[0007] Preferably, in the use state, the upper end of the support frame is connected to the cross beam of the main structure of the building, and the lower end of the support frame is fixed in the foundation. The support frame is provided outside the front explosion surface of the wall of the main structure of the building.

[0008] Preferably, a fire-proof material is filled in the deformation support layer.

[0009] More preferably, the fire-proof material is selected from at least one of fire-proof rock wool or aluminum silicate wool.

[0010] Preferably, the shape of the support member is selected from one of Z-shaped or M-shaped.

[0011] Preferably, the support member includes a support plate and a first contact plate and a second contact plate located at both ends of the support plate. The first contact plate and the second contact plate are parallel to the support frame and the corrugated plate. The first contact plate is connected to the front explosion surface of the support frame through a first contact surface, and the second contact plate is connected to the back explosion surface of the corrugated plate through a second contact surface.

[0012] More preferably, the first contact plate and the second contact plate are equal and aligned.

[0013] Preferably, the side surfaces around the deformation support layer are in a stepped shape, and the stepped side surfaces of the deformation support layer are indented inward by at least one step from the support frame to the corrugated plate.

[0014] Preferably, the surrounding frame includes a first section that is attached to the support frame, a second section that is attached to the deformation support layer, and a third section that is attached to the corrugated plate, which are connected in sequence. The first section is connected to the front explosion surface of the support frame, and the third section is connected to the side wall of the corrugated plate.

[0015] Preferably, the corrugated plate comprises a plurality of corrugated units arranged side by side. The corrugated units are cylindrical, and their cross-sections are isosceles trapezoids. In the corrugated units, the side corresponding to the upper base of the isosceles trapezoid cross-section is the first side, and the side corresponding to the lower base of the isosceles trapezoid cross-section is the second side. The first side is located on the blast-back surface of the corrugated plate, and the second side is located on the blast-facing surface of the corrugated plate.

[0016] Preferably, the thickness of the support member is not greater than the thickness of the corrugated plate.

[0017] More preferably, the thicknesses of the support plate, the first contact plate, and the second contact plate are not greater than the thickness of the corrugated unit.

[0018] Preferably, the material of the corrugated plate is selected from one of carbon steel or stainless steel.

[0019] Preferably, the materials of the support member and the surrounding frame are selected from one of carbon steel or stainless steel.

[0020] In a second aspect of the present invention, a method for constructing a corrugated blast-resistant firewall is provided, comprising the following steps:

[0021] 1) Through finite element analysis, establish a preliminary computer model of the above-mentioned corrugated blast-resistant firewall;

[0022] 2) According to the load of the explosion impact received by the blast-facing surface of the corrugated blast-resistant firewall, input the load data into the preliminary computer model established in step 1) for structural dynamic calculation;

[0023] 3) According to the results of the structural dynamic calculation obtained in step 2), determine the structural response value of the corrugated blast-resistant firewall;

[0024] 4) Compare the structural response value of the corrugated blast-resistant firewall obtained in step 3) with the allowable structural response value;

[0025] 5) When the structural response value does not meet the allowable structural response value, optimize the structure of the corrugated blast-resistant firewall, and repeat steps 2), 3), and 4); when the structural response value meets the allowable structural response value, determine the construction requirements of the corrugated blast-resistant firewall structure.

[0026] Preferably, in step 1), the software used for the finite element analysis is a commonly used finite element analysis software, which can be purchased on the market.

[0027] Preferably, in step 1), the preliminary computer model is in the same proportion as the structural dimensions of the corrugated blast-resistant firewall.

[0028] More preferably, the preliminary computer model is 1:1 with the structural dimensions of the corrugated blast-resistant firewall.

[0029] Preferably, in step 1), the primary computer model further includes the main building structure connected to the corrugated blast-resistant firewall.

[0030] Preferably, in step 2), the load is calculated according to the national standard for building blast resistance shock GB50779-2012 "Code for Blast Resistant Design of Petrochemical Control Rooms".

[0031] Preferably, in step 2), the data representation form of the load is the pressure time history curve.

[0032] Preferably, in step 2), the structural dynamic calculation is carried out by using the time domain explicit integration method.

[0033] More preferably, the total duration of the structural dynamic calculation is 2 to 3 times the loading duration.

[0034] Preferably, in step 3), the structural response value is selected from at least one of the corner value, displacement value, stress value, and plastic strain value.

[0035] The corner value is the corner value of the bending deformation of the beam or column in the main building structure within the corrugated blast-resistant firewall after the corrugated blast-resistant firewall is subjected to an explosion shock.

[0036] The displacement value is the displacement value of the moving deformation of the beam or column in the main building structure within the corrugated blast-resistant firewall after the corrugated blast-resistant firewall is subjected to an explosion shock. The displacement value limit includes the mid-span displacement value and the extreme end displacement value.

[0037] The stress value is the stress generated by the corrugated blast-resistant firewall after the corrugated blast-resistant firewall is subjected to an explosion shock. The stress value takes the maximum principal stress value of the element.

[0038] The plastic strain value is the plastic strain generated by the corrugated blast-resistant firewall after the corrugated blast-resistant firewall is subjected to an explosion shock. The plastic strain value takes the equivalent plastic strain value of the element.

[0039] Preferably, in step 4), the structural response allowable value is selected from at least one of the corner allowable value, displacement allowable value, stress allowable value, and plastic strain allowable value.

[0040] The corner allowable value and the displacement allowable value are the numerical values for evaluating the corner and displacement specified in the national standard GB50779-2012. The stress allowable value is the tensile strength of the material used for the corrugated blast-resistant firewall. The plastic strain allowable value is the elongation at break of the material used for the corrugated blast-resistant firewall.

[0041] Preferably, in step 5), the optimization method adjusts each component in the corrugated blast-resistant firewall according to the specific situation where the structural response value does not meet the structural response determination value.

[0042] Since the probability of an explosion during the production process is very low and belongs to an accidental condition, in the blast-resistant design of this application, it is allowed for blast-resistant components to undergo a certain amount of plastic deformation without affecting the strength and stability of the main structure. This includes two aspects: First, the blast-resistant components can undergo a certain amount of plastic deformation under the explosion load, but still ensure their structural integrity, that is, they can undergo large permanent deformations but will not be damaged; second, the strength of the main structure supporting the blast-resistant components must be satisfied. Therefore, on the premise of avoiding a substantial increase in material weight and size, absorbing as much shock wave energy as possible through its own deformation, reducing the transmission of the instantaneous load peak by improving the shape of the support, and enabling the blast-resistant wall to have fireproof performance are the main directions for optimizing a corrugated blast-resistant firewall provided in this application.

[0043] The third aspect of the present invention provides a construction system for a corrugated blast-resistant firewall, including:

[0044] A finite element analysis modeling module for establishing a computer primary model of the corrugated blast-resistant firewall according to any one of claims 1 to 7 through finite element analysis;

[0045] A structural dynamics calculation module for inputting the load data of the explosion shock received by the blast-facing surface of the corrugated blast-resistant firewall into the computer primary model for structural dynamics calculation;

[0046] A structural response module for determining the structural response value of the corrugated blast-resistant firewall according to the results of the structural dynamics calculation;

[0047] A comparison and judgment module for comparing the obtained structural response value of the corrugated blast-resistant firewall with the structural response allowable value to determine the construction requirements of the structure of the corrugated blast-resistant firewall.

[0048] The fourth aspect of the present invention provides a computer-readable storage medium storing a computer program, which is executed to implement the above-mentioned construction method of the corrugated blast-resistant firewall.

[0049] As described above, a corrugated blast-resistant firewall and its construction method provided by the present invention have the following beneficial effects:

[0050] (1) The corrugated blast-resistant firewall and its construction method provided by the present invention add a stepped frame, Z-shaped or M-shaped supports to the constructed blast-resistant firewall, and fill fireproof materials between the corrugated plates and the support frame, and have both blast-resistant and fireproof functions.

[0051] (2) The corrugated blast-resistant firewall and its construction method provided by the present invention aim to overcome the drawback that the existing corrugated steel blast-resistant wall transfers excessive explosion force to the main structure due to the increase in local structural stiffness, resulting in an increase in the force on the main structure and endangering the overall safety of the structure. By increasing the normal distance between the support frame and the corrugated plate, the corrugated plate is connected to the support frame through a stepped frame structure around its perimeter, and at least one Z-shaped or M-shaped support member is added between the two. When an explosion occurs, by allowing the stepped frame, Z-shaped or M-shaped support member to undergo large plastic deformation to absorb the energy of the explosion load, while ensuring the strength and structural integrity of the corrugated plate, the explosion load transmitted to the main structure of the building is effectively reduced, the effective impact is reduced, and the safety of the main structure of the building is guaranteed. Moreover, since the force transmission path of the stepped frame structure is more tortuous, the transmission of stress waves can be reduced, and the peak value of the load can be effectively reduced when subjected to instantaneous loads, playing a role of "slow release" and better enhancing the impact resistance of the overall structure. Thus, the safety of the main structure of the building is improved, the safety of the personnel and equipment inside the structure is protected, and the losses caused by explosion disasters are reduced.

[0052] (3) The corrugated blast-resistant firewall and its construction method provided by the present invention fill fireproof materials in the increased space between the support frame and the corrugated steel plate. The fireproof materials filled inside can also effectively block the spread of flames, enabling the blast-resistant wall of this application to have a certain fireproof ability. It can provide greater protection for the personnel behind the blast-resistant wall when an explosion occurs.

[0053] (4) The corrugated blast-resistant firewall and its construction method provided by the present invention can significantly reduce the workload of the main structure reinforcement project for relatively common anti-explosion renovation projects of old chemical plants / control rooms. On the premise of meeting the national anti-explosion safety requirements, the economy is improved. Therefore, with the continuous increase in the degree of attention to work safety in China, the application prospect of the present invention is very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It shows a three-dimensional structural schematic diagram of the building where a corrugated blast-resistant firewall in the present invention is located.

[0055] Figure 2 It shows a connection structural schematic diagram of a corrugated blast-resistant firewall in the present invention and the main structure of the building.

[0056] Figure 3 It shows an overall structural schematic diagram of a corrugated blast-resistant firewall in the present invention.

[0057] Figure 4 It shows a connection structural schematic diagram of the corrugated plate and the frame in a corrugated blast-resistant firewall in the present invention.

[0058] Figure 5 It shows a schematic structural diagram of the fireproof material layer and the support member in a corrugated explosion-proof firewall in the present invention.

[0059] Figure 6 It shows a schematic cross-sectional structural diagram of the M-shaped support member in a corrugated explosion-proof firewall in the present invention.

[0060] Figure 7 It shows a time history curve of the force on the main structural beam of a building with a corrugated explosion-proof firewall in the present invention.

[0061] Figure 8 It shows a time history curve of the energy absorption of a corrugated explosion-proof firewall in the present invention.

[0062] Figure 9 It shows a schematic module diagram of the construction system of a corrugated explosion-proof firewall in the present invention

[0063] Reference numerals

[0064] 1 Support frame

[0065] 2 Deformation support layer

[0066] 3 Corrugated plate

[0067] 31 Corrugated unit

[0068] 4 Support member

[0069] 41 Support plate

[0070] 42 First contact plate

[0071] 43 Second contact plate

[0072] C First contact surface

[0073] D Second contact surface

[0074] 5 Enclosure

[0075] 51 First section

[0076] 52 Second section

[0077] 53 Third section

[0078] A Back explosion surface

[0079] B Blast-facing surface

[0080] 101 Finite element analysis modeling module

[0081] 102 Structural dynamic calculation module

[0082] 103 Structural response module

[0083] 104 Comparison and Judgment Module Specific Embodiment

[0084] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0085] Please refer to Figures 1 to 9 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0086] The first aspect of the present invention provides a corrugated explosion-proof firewall, as Figures 1-6 shown, a support frame 1, a deformation support layer 2, and a corrugated plate 3 are sequentially provided from the explosion-proof back surface to the explosion-proof front surface direction. At least one support member 4 is provided in the deformation support layer 2. The two ends of the support member 4 are respectively connected to the support frame 1 and the corrugated plate 3. A surrounding frame 5 is provided around the deformation support layer 2 and the corrugated plate 3. One end of the surrounding frame 5 is connected to the support frame 1, and the other end of the surrounding frame 5 is connected to the corrugated plate 3.

[0087] In a specific embodiment, as Figure 2 shown, in the use state, the upper end of the support frame 1 is connected to the cross beam of the main structure of the building, and the lower end of the support frame 1 is fixed in the foundation. The support frame 1 is arranged outside the explosion-proof front surface of the wall of the main structure of the building, and the support frame 1 is used to support the deformation support layer 2 and the corrugated plate 3.

[0088] In a specific embodiment, the deformation support layer 2 is filled with a fireproof material.

[0089] Specifically, the fireproof material includes but is not limited to fireproof rock wool and aluminum silicate wool. The fireproof material is selected according to the fire protection grade of the main structure of the building, can effectively block the spread of fire, and has a certain fire protection ability.

[0090] In a preferred embodiment, as Figure 3, 5 As shown in Figure 6, the shape of the support member 4 is selected from one of a Z shape or an M shape. The support member 4 is respectively connected to the support frame 1 and the corrugated plate 3, and can generate a large plastic deformation to absorb explosion energy, thereby effectively reducing the load transmitted to the main structure while ensuring the strength of the corrugated steel anti-explosion wall.

[0091] In a preferred embodiment, as Figure 3 shown, the support member 4 includes a support plate 41 and a first contact plate 42 and a second contact plate 43 located at both ends of the support plate 41. The first contact plate 42 and the second contact plate 43 are parallel to the support frame 1 and the corrugated plate 3. The first contact plate 42 is connected to the explosion-facing surface of the support frame 1 through a first contact surface C, and the second contact plate 43 is connected to the explosion-backing surface of the corrugated plate 3 through a second contact surface.

[0092] Specifically, as Figure 6 shown, the first contact plate 42 and the second contact plate 43 are equal and aligned.

[0093] In a preferred embodiment, as Figure 3 shown, the peripheral side surface of the deformation support layer 2 is stepped, and the stepped side surface of the deformation support layer 2 is indented inward by at least one step from the support frame 1 to the corrugated plate 3.

[0094] In a preferred embodiment, as Figure 3 , 5 shown, the surrounding frame 5 includes a first section 51 that is sequentially connected and fits with the support frame 1, a second section 52 that fits with the deformation support layer 2, and a third section 53 that fits with the corrugated plate 3. The first section 51 is connected to the explosion-facing surface of the support frame 1, and the third section 53 is connected to the side wall of the corrugated plate 3. The third section 53 is used to embed the corrugated plate 3 into the space surrounded by the third section 53.

[0095] Thereby making the second section 52 of the surrounding frame 5 stepped. Since the force transmission path of the stepped surrounding frame 5 is more tortuous, the transmission of stress waves can be reduced, and the peak value of the load can be effectively reduced when subjected to instantaneous loads, playing a role of "slow release".

[0096] In a preferred embodiment, as Figure 4As shown, the corrugated plate 3 includes a number of corrugated units 31 arranged side by side. The corrugated units 31 are cylindrical, and their cross-sections are isosceles trapezoids. In the corrugated unit 31, the side corresponding to the upper base of its isosceles trapezoid cross-section is the first side, and the side corresponding to the lower base of its isosceles trapezoid cross-section is the second side. The first side is located on the back blast surface of the corrugated plate 3, and the second side is located on the blast-facing surface of the corrugated plate 3. The upper base of the isosceles trapezoid cross-section can be longer than the lower base or shorter than the lower base.

[0097] In a specific embodiment, the thickness of the support member 4 is not greater than the thickness of the corrugated plate 3. It can produce plastic deformation, absorb the energy of the explosion load, and reduce the effective impact.

[0098] Specifically, the thicknesses of the support plate 41, the first contact plate 42, and the second contact plate 43 are not greater than the thickness of the corrugated unit 31.

[0099] In a specific embodiment, the material of the corrugated plate 3 is selected from one of carbon steel or stainless steel.

[0100] In a specific embodiment, the materials of the support member 4 and the surrounding frame 5 are selected from one of carbon steel or stainless steel.

[0101] In a specific embodiment, in the corrugated blast-resistant firewall provided by the present invention, the connection method of each component is welding.

[0102] The second aspect of the present invention provides a method for constructing a corrugated blast-resistant firewall, including the following steps:

[0103] 1) Through finite element analysis, establish a preliminary computer model of the above-mentioned corrugated blast-resistant firewall;

[0104] 2) According to the explosion impact load received by the blast-facing surface of the corrugated blast-resistant firewall, input the load data into the preliminary computer model established in step 1) for structural dynamic calculation;

[0105] 3) According to the results of the structural dynamic calculation obtained in step 2), determine the structural response value of the corrugated blast-resistant firewall;

[0106] 4) Compare the structural response value of the corrugated blast-resistant firewall obtained in step 3) with the allowable structural response value;

[0107] 5) When the structural response value does not meet the allowable structural response value, optimize the structure of the corrugated blast-resistant firewall, and repeat steps 2), 3), and 4); when the structural response value meets the allowable structural response value, determine the construction requirements of the corrugated blast-resistant firewall structure.

[0108] In a specific embodiment, in step 1), the software used for the finite element analysis is a commonly used finite element analysis software, which can be obtained by purchasing from the market. Specifically, the finite element analysis software includes, but is not limited to, Ansys, Ls-Dyna, etc.

[0109] In a specific embodiment, in step 1), the computer primary model is in the same proportion as the structural dimensions of the corrugated blast-resistant firewall.

[0110] Specifically, the computer primary model is in a 1:1 ratio with the structural dimensions of the corrugated blast-resistant firewall.

[0111] In a specific embodiment, in step 1), the computer primary model further includes the main building structure connected to the corrugated blast-resistant firewall. The main building structure is arranged within the back blast surface of the corrugated blast-resistant firewall.

[0112] In a specific embodiment, in step 2), the load is calculated according to the national standard for building blast resistance. The load can be calculated by a safety evaluation agency with relevant qualification certifications.

[0113] Specifically, the national standard for building blast resistance is GB50779-2012 "Code for Blast Resistant Design of Petrochemical Control Rooms".

[0114] In a specific embodiment, in step 2), the data representation form of the load is a pressure time history curve.

[0115] In a specific embodiment, in step 2), the structural dynamic calculation is carried out by the method of explicit time-domain integration. The method of explicit time-domain integration is a commonly used calculation method in the art.

[0116] Specifically, the total duration of the structural dynamic calculation is 2 to 3 times the loading duration.

[0117] In a specific embodiment, in step 3), the structural response values include, but are not limited to, rotation angle values, displacement values, stress values, plastic strain values, etc.

[0118] The structural response values are used to determine whether the strengths of the components in the corrugated blast-resistant firewall meet the requirements, whether the energy absorption is sufficient, and whether the main building structure within the corrugated blast-resistant firewall will be in danger after the corrugated blast-resistant firewall is subjected to an explosion shock.

[0119] Specifically, the corner value is the corner value of the bending deformation of the beam or column in the main structure of the building within the corrugated explosion-resistant firewall after the corrugated explosion-resistant firewall is subjected to an explosion shock. The corner value is used to determine whether excessive bending will occur in the main structure of the building within the corrugated explosion-resistant firewall, and its determination requirements shall comply with the national standard GB50779-2012.

[0120] Specifically, the displacement value is the displacement value of the movement deformation of the beam or column in the main structure of the building within the corrugated explosion-resistant firewall after the corrugated explosion-resistant firewall is subjected to an explosion shock. The displacement value limits include the mid-span displacement value and the extreme end displacement value. The displacement value is converted by the single-degree-of-freedom method to obtain the values of the extreme mid-span displacement and the extreme end displacement, which are used to determine whether excessive displacement will occur in the main structure of the building connected to the corrugated explosion-resistant firewall, and its determination requirements shall comply with the national standard GB50779-2012.

[0121] Specifically, the stress value is the stress generated by the corrugated explosion-resistant firewall after the corrugated explosion-resistant firewall is subjected to an explosion shock. The stress value takes the maximum principal stress value of the element. The stress value is used to determine whether the structure of the corrugated explosion-resistant firewall is damaged.

[0122] Specifically, the plastic strain value is the plastic strain generated by the corrugated explosion-resistant firewall after the corrugated explosion-resistant firewall is subjected to an explosion shock. The plastic strain value takes the equivalent plastic strain value of the element. The plastic strain value is used to determine whether the structure of the corrugated explosion-resistant firewall is damaged.

[0123] In a specific embodiment, in step 4), the allowable values of the structural response include but are not limited to the allowable corner value, the allowable displacement value, the allowable stress value, the allowable plastic strain value, etc.

[0124] Specifically, the allowable corner value is the value for evaluating the corner specified in the national standard GB50779-2012. When the corner value exceeds the allowable corner value, it is considered that the main structure of the building does not meet the strength requirements of the national standard GB50779-2012.

[0125] Specifically, the allowable displacement value is the value for evaluating the displacement specified in the national standard GB50779-2012. When the displacement value exceeds the allowable displacement value, it is considered that the main structure of the building does not meet the strength requirements of the national standard GB50779-2012.

[0126] Specifically, the allowable stress value is the tensile strength of the material used for the corrugated explosion-resistant firewall. When the stress value exceeds the allowable stress value, it is considered that the structure of the corrugated explosion-resistant firewall is damaged.

[0127] Specifically, the allowable value of the plastic strain is the elongation at break of the material used for the corrugated blast-resistant firewall. When the plastic strain value exceeds the allowable value of the plastic strain, it is considered that the structure of the corrugated blast-resistant firewall is damaged.

[0128] In a specific embodiment, in step 5), the optimization method adjusts each component in the corrugated blast-resistant firewall according to the specific situation where the structural response value does not meet the structural response determination value.

[0129] Specifically, when the corner value exceeds the allowable corner value or the displacement value exceeds the allowable displacement value, that is, the deformation of the main structure of the building is too large, the thickness of the perimeter frame and the support members in the corrugated blast-resistant firewall can be reduced to generate greater plastic strain to improve the energy absorption effect, or the number of steps of the perimeter frame can be increased to make the force transmission path more tortuous.

[0130] Specifically, when the stress value exceeds the allowable stress value or the plastic strain value exceeds the allowable value of the plastic strain, that is, the structure of the corrugated blast-resistant firewall is damaged, and the corrugated plate or the perimeter frame is damaged, the thickness of the corrugated plate or the perimeter frame should be increased, or the number of support members should be increased; when the support member is damaged, the thickness or the number of support members can be increased, or the thickness of the corrugated plate can be reduced.

[0131] In a specific embodiment, in step 5), in the construction requirements of the corrugated blast-resistant firewall, the specification requirements of each component include but are not limited to the thickness and cross-sectional dimensions of the corrugated plate, the thickness and cross-sectional dimensions of the perimeter frame, the thickness and cross-sectional dimensions of the support members, etc.

[0132] In a further preferred embodiment, the thickness of the support member should not be greater than the thickness of the corrugated plate.

[0133] In a specific embodiment, in step 5), in the construction requirements of the corrugated blast-resistant firewall, the support member and the perimeter frame are allowed to have relatively severe plastic deformation.

[0134] In a specific embodiment, in step 5), in the construction requirements of the corrugated blast-resistant firewall, the corrugated plate is allowed to have a certain degree of plastic deformation, but local material failure is not allowed.

[0135] The third aspect of the present invention provides a construction system for a corrugated blast-resistant firewall, as Figure 9 shown, including:

[0136] A finite element analysis and modeling module 101, configured to establish a preliminary computer model of the corrugated blast-resistant firewall according to any one of claims 1 to 7 through finite element analysis;

[0137] The structural dynamic calculation module 102 is used to input the load data into the computer primary model for structural dynamic calculation according to the load of the explosion impact on the explosion-facing surface of the corrugated blast-resistant firewall;

[0138] The structural response module 103 is used to determine the structural response value of the corrugated blast-resistant firewall according to the results of the structural dynamic calculation;

[0139] The comparison and judgment module 104 is used to compare the obtained structural response value of the corrugated blast-resistant firewall with the allowable structural response value to determine the construction requirements of the corrugated blast-resistant firewall structure.

[0140] It should be noted that it should be understood that the division of each module of the above system is only a division of logical functions. In actual implementation, it can be fully or partially integrated into a physical entity, or physically separated. These modules can all be implemented in the form of software called by a processing element; they can also all be implemented in the form of hardware; or some modules can be implemented in the form of software called by a processing element, and some modules can be implemented in the form of hardware. For example, the comparison and judgment module 104 can be a separately established processing element, or can be integrated in a certain chip. In addition, it can also be stored in the memory in the form of program code and called and executed by a certain processing element to perform the functions of the above comparison and judgment module 104. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together or can be independently implemented. The processing element mentioned here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit in the processor element or the instruction in the form of software.

[0141] For example, the above modules can be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASIC), or, one or more digital signal processors (DSP), or, one or more field programmable gate arrays (FPGA), etc. Again, when a certain module above is implemented in the form of a processing element scheduling program code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program code. Again, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0142] The fourth aspect of the present invention provides a computer-readable storage medium storing a computer program which is executed to implement the construction method of the corrugated explosion-resistant firewall. The computer-readable storage medium may include, but is not limited to, a floppy disk, an optical disk, a CD-ROM (Compact Disc Read-Only Memory), a magneto-optical disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), an EPROM (Erasable Programmable Read-Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), a magnetic card or an optical card, a flash memory, or other types of media / machine-readable media suitable for storing machine-executable instructions. The computer-readable storage medium may be a product not connected to a computer device or a component already connected to and used by a computer device.

[0143] In a specific implementation, the computer program is a routine, program, object, component, data structure, etc. that performs a specific task or implements a specific abstract data type.

[0144] Embodiment 1

[0145] There is an existing central control room building in a chemical plant. The anti-explosion transformation is carried out on the wall of the explosion-facing surface of the building. Outside the explosion-facing surface of the wall, a sample 1# of the corrugated explosion-resistant firewall in the present invention is set up to minimize the impact on the main structure of the building as much as possible while ensuring the integrity of the wall. The corrugated explosion-resistant firewall in the present invention is arranged outside the explosion-facing surface wall of the main structure of the building and is successively provided with a support frame, a deformation support layer, and a corrugated plate from the explosion-back surface to the explosion-facing surface direction. Among them, the upper end of the support frame is connected to the cross beam of the main structure of the building, and the lower end of the support frame is fixed in the foundation. The deformation support layer is filled with fireproof rock wool. The corrugated plate is the main body of the explosion-resistant wall, and its material is Q345B steel, and the thickness of the corrugated plate is 4 mm. The corrugated plate is composed of a plurality of corrugated units arranged side by side in an isosceles trapezoid shape. The first side surface of the corrugated unit is located on the explosion-back surface of the corrugated plate, and the second side surface of the corrugated unit is located on the explosion-facing surface of the corrugated plate.

[0146] The corrugated explosion-resistant firewall sample 1# is provided with a total of 4 support members along the vertical direction. The support members are Z-shaped support members with a thickness of 2 mm, and the material of the support members is Q345B steel. The support member includes a support plate and a first contact plate and a second contact plate located at both ends of the support plate. The first contact plate and the second contact plate are parallel to the support frame and the corrugated plate. The first contact plate is connected to the explosion-facing surface of the support frame through a first contact surface, and the second contact plate is connected to the explosion-back surface of the corrugated plate through a second contact surface.

[0147] The peripheral side surfaces of the deformation support layer are stepped, and the stepped side surfaces of the deformation support layer are indented by one step inward from the support frame to the corrugated plate. The surrounding frame includes a first section that is sequentially connected and fits with the support frame, a second section that fits with the deformation support layer, and a third section that fits with the corrugated plate. The first section is connected to the blast-facing surface of the support frame, and the third section is connected to the side wall of the corrugated plate. Among them, the material of the surrounding frame is Q345B steel, and the thickness of the surrounding frame is 4 mm.

[0148] The performance test of the corrugated blast-resistant firewall sample 1# was carried out. Its yield strength is 345 MPa, tensile strength is 470 MPa, elastic modulus is 210 GPa, and Poisson's ratio is 0.3. It can withstand the reflected overpressure of the blast shock wave with a peak value of 191 kPa and a duration of 34 ms.

[0149] Example 2

[0150] In the construction of the corrugated blast-resistant firewall sample 1# in the present invention, through finite element analysis, a computer primary model with a 1:1 size identical to that of the corrugated blast-resistant firewall is established. The computer primary model also includes the main structure of the building connected to the corrugated blast-resistant firewall.

[0151] According to the load of the blast shock received by the blast-facing surface of the corrugated blast-resistant firewall sample 1#, the load data is input into the computer primary model for structural dynamic calculation. The load is calculated in accordance with the national standard for building blast resistance shock GB50779-2012 "Code for Blast Resistance Design of Petrochemical Control Rooms", and the data representation of the load is the pressure time history curve. The structural dynamic calculation is carried out by the method of time domain explicit integration, and the total duration of the structural dynamic calculation is 2 to 3 times the loading duration.

[0152] According to the results of the structural dynamic calculation, the structural response values of the corrugated blast-resistant firewall are determined. The structural response values include rotation angle values, displacement values, stress values, and plastic strain values. The structural response values of the corrugated blast-resistant firewall are compared with the allowable structural response values. The allowable structural response values include allowable rotation angle values, allowable displacement values, allowable stress values, and allowable plastic strain values.

[0153] When the structural response values do not meet the allowable structural response values, the structure of the corrugated blast-resistant firewall is optimized, and each component in the corrugated blast-resistant firewall is adjusted. Then, repeat the steps of inputting load data, structural dynamic calculation, determining structural response values, and comparing with the allowable structural response values; when the structural response values meet the allowable structural response values, determine the construction requirements of the corrugated blast-resistant firewall structure.

[0154] Example 3

[0155] The corrugated explosion - resistant firewall sample 1# prepared in Example 1 and the existing ordinary corrugated explosion - resistant wall were respectively established with simulation models for effect comparison. The model grid size was 50 mm, and the calculation results are shown in Table 1. Figure 7 、 Figure 8 。

[0156] From Table 1, Figure 7 、 Figure 8 it can be known that for the explosion - resistant firewall in this application, the maximum displacement is 130% of that of the ordinary explosion - resistant wall, the plastic strain is 268% of that of the ordinary explosion - resistant wall, the peak value of the load transmitted to the main structure cross - beam is 64% of that of the ordinary explosion - resistant wall, and the energy absorption is 153% of that of the ordinary explosion - resistant wall. Simply put, the explosion - resistant firewall of this application can cause greater deformation and greater plastic strain in itself, thereby absorbing more explosion energy, effectively reducing the explosion damage suffered by the main structure, and better playing a protective role.

[0157] Table 1

[0158]

[0159] In summary, a corrugated explosion - resistant firewall and its construction method provided by the present invention can, while ensuring the structural strength of the explosion - resistant firewall, effectively reduce the load transmitted to the main building structure, and can block the propagation of explosion flames, ensuring the safety of the overall building structure and protecting the lives of the people inside the building. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0160] The above - mentioned embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above - mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A corrugated blast-resistant firewall, characterized in that, a support frame (1), a deformation support layer (2), and a corrugated plate (3) are successively provided from the blast-back surface A to the blast-facing surface B. At least one support member (4) is provided in the deformation support layer (2). Both ends of the support member (4) are respectively connected to the support frame (1) and the corrugated plate (3). A surrounding frame (5) is provided around the deformation support layer (2) and the corrugated plate (3). One end of the surrounding frame (5) is connected to the support frame (1), and the other end of the surrounding frame (5) is connected to the corrugated plate (3); the upper end of the support frame (1) is connected to the cross beam of the main structure of the building, and the lower end of the support frame (1) is fixed in the foundation; a fireproof material is filled in the deformation support layer (2); the fireproof material is selected from at least one of fireproof rock wool or aluminum silicate wool; the surrounding frame (5) includes a first section (51) that is attached to the support frame (1), a second section (52) that is attached to the deformation support layer (2), and a third section (53) that is attached to the corrugated plate (3) which are successively connected. The first section (51) is connected to the blast-facing surface of the support frame (1), and the third section (53) is connected to the side wall of the corrugated plate (3); the corrugated plate (3) includes a plurality of corrugated units (31) arranged side by side. The corrugated units (31) are columnar, and their cross-sections are isosceles trapezoids. In the corrugated unit (31), the side corresponding to the upper base of its isosceles trapezoid cross-section is the first side, and the side corresponding to the lower base of its isosceles trapezoid cross-section is the second side. The first side is located on the blast-back surface of the corrugated plate (3), and the second side is located on the blast-facing surface of the corrugated plate (3); the support member (4) includes a support plate (41) and first contact plates (42) and second contact plates (43) located at both ends of the support plate (41). The first contact plates (42) and the second contact plates (43) are parallel to the support frame (1) and the corrugated plate (3). The first contact plate (42) is connected to the blast-facing surface of the support frame (1) through a first contact surface C, and the second contact plate (43) is connected to the blast-back surface of the corrugated plate (3) through a second contact surface D; the shape of the support member (4) is selected from one of the Z type or the M type; the peripheral side surfaces of the deformation support layer (2) are stepped, and the stepped side surfaces of the deformation support layer (2) are indented by at least one step from the support frame (1) to the corrugated plate (3).

2. A construction method of a corrugated blast-resistant firewall, comprising the following steps: 1) Through finite element analysis, establish a computer primary model of the corrugated blast-resistant firewall described in claim 1; 2) According to the load of the explosion impact received by the blast-facing surface of the corrugated blast-resistant firewall, input the load data into the computer primary model established in step 1) for structural dynamic calculation; 3) According to the results of the structural dynamic calculation obtained in step 2), determine the structural response value of the corrugated blast-resistant firewall; 4) Compare the structural response value of the corrugated blast-resistant firewall obtained in step 3) with the allowable value of the structural response. 5) When the structural response value does not meet the allowable value of the structural response, optimize the structure of the corrugated blast-resistant firewall, and repeat steps 2), 3), and 4); when the structural response value meets the allowable value of the structural response, determine the construction requirements of the corrugated blast-resistant firewall structure.

3. A construction system for a corrugated blast-resistant firewall, comprising: A finite element analysis and modeling module (101) for establishing a primary computer model of the corrugated blast-resistant firewall described in claim 1 through finite element analysis; A structural dynamics calculation module (102) for inputting the load data of the explosion shock received by the blast-facing surface of the corrugated blast-resistant firewall into the primary computer model for structural dynamics calculation; A structural response module (103) for determining the structural response value of the corrugated blast-resistant firewall according to the results of the structural dynamics calculation; A comparison and judgment module (104) for comparing the obtained structural response value of the corrugated blast-resistant firewall with the allowable value of the structural response to determine the construction requirements of the corrugated blast-resistant firewall structure.

4. A computer-readable storage medium storing a computer program that is executed to implement the construction method of the corrugated blast-resistant firewall described in claim 2.

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