Building envelope wind resistance calculation method considering overall-local wind effect

Abstract

This invention discloses a method for calculating the wind resistance of building envelopes considering overall-local wind effects. The method includes atmospheric boundary layer flow field simulation, obtaining wind load time histories of buildings with envelopes through wind tunnel testing, establishing a refined finite element model of the building considering the envelope, calculating the actual wind-induced response of the envelope components, extracting the constrained displacement response of the envelope caused by the main structure response from the refined finite element model, establishing an independent analysis model of the envelope, applying local wind loads to obtain the wind-induced internal forces of the components caused by local wind effects, analyzing the internal forces, and correcting the parameters of the envelope using design wind loads. The beneficial effects of this invention are: it overcomes the deficiency in existing design codes regarding the insufficient consideration of the contribution of design wind loads on the overall wind effect of envelope components, and provides a reference for determining the design wind load values ​​for envelope types not explicitly defined in the codes (such as thin-walled single-shell structures, secondary components of large-span spatial structures, etc.).

Description

Technical Field

[0001] This invention relates to wind resistance calculation of building envelopes considering both overall and local wind effects, particularly to wind resistance calculation of building envelopes for large-span spaces and high-rise buildings. Specifically, it is a method for wind resistance calculation of building envelopes considering overall-local wind effects, belonging to the field of building envelope safety design technology. Background Technology

[0002] For large-span spaces and high-rise buildings, due to their low structural stiffness, long natural period, and small damping ratio, the structural response caused by wind loads becomes increasingly significant, making wind loads the main controlling load in the design of such structures. As non-load-bearing enclosure structures, compared to wind-sensitive structures as a whole, they possess structural characteristics such as small geometric dimensions, high stiffness, and high damping ratios. Currently, most wind-resistant design calculations for their components (such as wind load characteristics and wind-induced effects) are based on local wind effects, focusing on the study of local wind load characteristics of components (considering the aerodynamic shape of the component, its location, structural group interference effects, and methods for estimating wind pressure extreme values) and the study of wind-induced fatigue performance of components at relatively low wind speeds. Component design methods based on local wind effects are also accepted by load codes in various countries.

[0003] In recent years, the damage to building envelope components under strong winds has occurred frequently, resulting in significant direct or indirect safety and economic losses. Clearly, the wind resistance design calculation method for building envelopes that only considers local wind effects based on the quasi-static indeterminate assumption needs to be re-examined.

[0004] 1) Under the influence of wind, the wind load effects (displacement, internal forces, etc.) of each component of a wind-sensitive structure are obviously related to the structural response under the overall wind load (or the overall wind effect). Simultaneously, from the perspective of a single component, the local wind load within its corresponding effective area also affects the component's wind load effect (or the local wind effect). Therefore, the wind-induced effect of wind-sensitive structural components is actually the result of the combined effect of the overall wind effect and the local wind effect. Existing wind-resistant design methods for building envelope systems adopt a design philosophy that primarily considers the local wind effect. This approach, focusing on mechanical behaviors such as wind load transfer, isolates the interaction between the overall wind effect and the local wind effect, potentially underestimating the wind-induced internal forces of the envelope.

[0005] 2) With the continuous development of high-performance materials, building envelope components are becoming lighter and more flexible while maintaining load-bearing capacity. Furthermore, with advancements in construction and installation techniques, the connection methods between building envelope components and the main load-bearing system are becoming increasingly diverse. Therefore, from the perspective of structural wind loads and their wind-induced internal forces, the boundary between the two is becoming increasingly blurred. This makes it difficult for engineering designers to determine reasonable wind load values ​​based on existing specifications (which typically clearly define the design wind loads for load-bearing structures and building envelope structures), thus also leading to potential safety hazards in building envelope design. Summary of the Invention

[0006] The purpose of this invention is to provide a wind resistance calculation method for building envelopes that considers the overall-local wind effect in order to solve at least one of the above-mentioned technical problems. This method can be used for the building envelopes of wind-sensitive buildings (large-span spaces, high-rise buildings, etc.) to consider the combined effect of the overall wind effect and the local wind effect, and calculate the contribution of the overall and local wind effects to the maximum value of the wind-induced internal force of the components, so as to provide a reference for improving the design and calculation of related components.

[0007] This invention achieves the above objective through the following technical solution: a method for calculating the wind resistance of a building envelope considering overall-local wind effects, comprising the following steps:

[0008] S1. Conduct atmospheric boundary layer flow field simulation and obtain wind load time history of buildings with enclosing structures through wind tunnel tests;

[0009] S2. Establish a refined finite element model of the building considering the building envelope, and calculate the actual wind-induced response (including internal forces and displacements) of the building envelope components.

[0010] S3. Extract the constraint displacement response of the enclosure structure caused by the response of the main structure in the refined finite element model;

[0011] S4. Establish an independent analysis model of the enclosure structure, apply S3 to obtain the constraint displacement and obtain the wind-induced internal forces of the components caused by the overall wind effect;

[0012] S5. Apply local wind loads to the independent analysis model of the building envelope to obtain the wind-induced internal forces of the components caused by local wind effects;

[0013] S6. By comparing the component internal force analysis results of S2, S4, and S5, analyze the contribution of overall / local wind effects to the wind-induced internal forces of the building envelope components.

[0014] S7. Based on existing design specifications, the parameters for the design wind load on the enclosure structure shall be corrected.

[0015] As a further technical solution of the present invention, step S1 specifically includes:

[0016] ① Determine the type of ground roughness based on the topographical environment of the building being calculated, and simulate the atmospheric boundary layer flow field according to relevant building wind tunnel standards;

[0017] ② Determine the appropriate geometric scaling ratio based on the building's dimensions (such as the height of high-rise buildings, the length and width of large-span spatial structures, etc.), and make a rigid test scaled-down model based on the structural shape;

[0018] ③ Obtain the dimensionless wind pressure coefficient time history at the measuring point of the rigid model through synchronous pressure measurement test, and then convert it into wind pressure time history data of the prototype structure based on similarity theory and actual structural design wind speed.

[0019] As a further technical solution of the present invention, step S2 specifically includes:

[0020] Establish a detailed finite element model of the building with an enclosure structure, including simulating the connection between the enclosure structure components and the main structure;

[0021] Wind-induced response analysis is performed using the wind pressure time history data obtained in step S1. To ensure the accuracy of the analysis, the number of nodes in the finite element model for wind load application is usually greater than the number of measurement points in the rigid pressure test. Therefore, the intrinsic orthogonal decomposition (POD) method is used to expand the wind load data information.

[0022] [R p ]{Φ}=λ{Φ}

[0023] In the formula, [R p [] represents the spatial covariance matrix of fluctuating wind pressure at known wind load data points; λ and [Φ] represent the eigenvalues ​​and eigenvectors of this covariance matrix, respectively. Therefore, the wind pressure p(x) at known wind load data points on the surface of the building envelope is... i ,y j ,t) can be obtained through the covariance eigenvector Φ at the data points. k (x i ,y j ) and the principal coordinate system a of the POD mode k The expression (t) is used to characterize this, as shown in the following formula:

[0024]

[0025]

[0026] Expanded wind load p e i (t) can be obtained through the expanded eigenvector Φ e k and POD modal principal coordinate system a k The expression (t) is used to characterize this, as shown in the following formula:

[0027]

[0028] The full-modal time history analysis method is used to obtain the wind-induced response (such as internal forces and displacements) of the building envelope components, which is taken as the true wind-induced response S of the component. T .

[0029] As a further technical solution of the present invention, step S3 specifically includes:

[0030] ① In the refined finite element model analysis, the wind-induced response of the main structure is identified and extracted, and the overall displacement response is used as the overall wind-induced effect;

[0031] ②Based on the connection method and constraint conditions between the enclosure structure and the main structure, the overall displacement response is transformed into the displacement response of the enclosure structure boundary conditions, and this constraint displacement response is used as the applied load for the independent analysis model of the enclosure structure.

[0032] As a further technical solution of the present invention, step S4 specifically includes:

[0033] Representative building envelope components are selected as independent analysis models. By applying the displacement time history obtained in step S3 at the constraint boundary, the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the overall wind effect, is calculated. O .

[0034] As a further technical solution of the present invention, step S5 specifically includes:

[0035] ①Based on the dimensionless wind pressure coefficient time history data of the building surface with enclosure structure obtained in step S1, considering similarity theory and based on the scale effect of the enclosure components, the local wind load time history data applicable to the prototype size of the enclosure components is calculated, and relevant statistical analysis is performed.

[0036] ② Select an independent analysis model for the building envelope components, apply virtual boundary conditions, and based on existing design codes and the quasi-static indeterminate assumption, apply local wind loads to calculate the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the local wind effect. L .

[0037] As a further technical solution of the present invention, step S6 specifically includes:

[0038] ① By comparing the analysis results of the building envelope, the contributions of the overall wind effect and the local wind effect to the wind-induced structural effect of the building envelope can be calculated as follows:

[0039] ② When analyzing the contribution of structural effects, the most unfavorable situation is selected, that is, the extreme values ​​of the wind-induced response of structural components under various wind effects (overall, local and real) are analyzed as the object of analysis.

[0040] As a further technical solution of the present invention, step S7 specifically includes:

[0041] Based on existing design specifications, the parameters for the design wind load on the building envelope are adjusted.

[0042] Based on the contribution calculation results, the wind load correction factor for the building envelope design is obtained:

[0043] If the overall wind effect contribution γ is known... O Then the correction factor

[0044] If the contribution of the local wind effect γ is known... L Then the correction factor

[0045] As a further technical solution of the present invention, the separation and extraction of the component wind-induced response caused by the overall and local wind effects in steps S5 and S6 can be selected based on the characteristics of the building envelope (structural stiffness, structural damping, connection with the main structure, etc.) to obtain the structural wind load effect S caused by the overall wind effect. O Or the structural wind load effect S caused by local wind effect L .

[0046] As a further technical solution of the present invention, in the absence of physical wind tunnel test conditions but with numerical simulation conditions, the time history of wind load on the building surface in step S1 can also be obtained by computational fluid dynamics (CFD) numerical simulation.

[0047] The beneficial effects of this invention are:

[0048] 1. Based on different connection methods between the enclosure structure and the main structure, provide analytical methods and models for identifying and separating wind-induced internal forces caused by overall / local wind effects;

[0049] 2. Based on the proposed wind resistance calculation method, the contribution of overall / local wind effects to the maximum wind-induced response of the building envelope components can be quantitatively analyzed, thus better explaining the mechanism of wind-induced damage to the building envelope.

[0050] 3. It makes up for the deficiency in the existing design code that does not adequately consider the contribution of the design wind load of the enclosure structure components to the overall wind effect, and can provide a reference for the design wind load values ​​of enclosure structure types that are not clearly defined in the code (such as thin-walled single-shell structures, secondary components of large-span spatial structures, etc.). Attached Figure Description

[0051] Figure 1 This is a flowchart of the wind resistance calculation for building envelopes considering the overall-local wind effect of the present invention;

[0052] Figure 2 This is a schematic diagram of a physical wind tunnel test according to an embodiment of the present invention;

[0053] Figure 3 This is the wind pressure extended POD time history curve of an embodiment of the present invention;

[0054] Figure 4 The above is the displacement response time history curve of the structural envelope structure according to an embodiment of the present invention;

[0055] Figure 5 Comparison of wind-induced internal forces in the building envelope of this invention (overall wind effect S) O -Real wind effect S T );

[0056] Figure 6 This represents the contribution of the overall wind effect of the building envelope to the actual wind effect in embodiments of the present invention. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Example 1

[0059] like Figure 1 As shown, a method for calculating the wind resistance of a building envelope considering overall-local wind effects includes the following steps:

[0060] S1. Conduct atmospheric boundary layer flow field simulation and obtain wind load time history of buildings with enclosing structures through wind tunnel tests;

[0061] S2. Establish a refined finite element model of the building considering the building envelope, and calculate the actual wind-induced response (including internal forces and displacements) of the building envelope components.

[0062] S3. Extract the constraint displacement response of the enclosure structure caused by the response of the main structure in the refined finite element model;

[0063] S4. Establish an independent analysis model of the enclosure structure, apply S3 to obtain the constraint displacement and obtain the wind-induced internal forces of the components caused by the overall wind effect;

[0064] S5. Apply local wind loads to the independent analysis model of the building envelope to obtain the wind-induced internal forces of the components caused by local wind effects;

[0065] S6. By comparing the component internal force analysis results of S2, S4, and S5, analyze the contribution of overall / local wind effects to the wind-induced internal forces of the building envelope components.

[0066] S7. Based on existing design specifications, the parameters for the design wind load on the enclosure structure shall be corrected.

[0067] Example 2

[0068] like Figure 1 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0069] Step S1 specifically includes:

[0070] ① Determine the type of ground roughness based on the topographical environment of the building being calculated, and simulate the atmospheric boundary layer flow field according to relevant building wind tunnel standards;

[0071] ② Determine the appropriate geometric scaling ratio based on the building's dimensions (such as the height of high-rise buildings, the length and width of large-span spatial structures, etc.), and make a rigid test scaled-down model based on the structural shape;

[0072] ③ Obtain the dimensionless wind pressure coefficient time history at the measuring point of the rigid model through synchronous pressure measurement test, and then convert it into wind pressure time history data of the prototype structure based on similarity theory and actual structural design wind speed.

[0073] Step S2 specifically includes:

[0074] Establish a detailed finite element model of the building with an enclosure structure, including simulating the connection between the enclosure structure components and the main structure;

[0075] Wind-induced response analysis is performed using the wind pressure time history data obtained in step S1. To ensure the accuracy of the analysis, the number of nodes in the finite element model for wind load application is usually greater than the number of measurement points in the rigid pressure test. Therefore, the intrinsic orthogonal decomposition (POD) method is used to expand the wind load data information.

[0076] [R p ]{Φ}=λ{Φ}

[0077] In the formula, [R p [] represents the spatial covariance matrix of fluctuating wind pressure at known wind load data points; λ and [Φ] represent the eigenvalues ​​and eigenvectors of this covariance matrix, respectively. Therefore, the wind pressure p(x) at known wind load data points on the surface of the building envelope is... i ,y j ,t) can be obtained through the covariance eigenvector Φ at the data points.k (x i ,y j ) and the principal coordinate system a of the POD mode k The expression (t) is used to characterize this, as shown in the following formula:

[0078]

[0079]

[0080] Expanded wind load p e i (t) can be obtained through the expanded eigenvector Φ e k and POD modal principal coordinate system a k The expression (t) is used to characterize this, as shown in the following formula:

[0081]

[0082] The full-modal time history analysis method is used to obtain the wind-induced response (such as internal forces and displacements) of the building envelope components, which is taken as the true wind-induced response S of the component. T .

[0083] Step S3 specifically includes:

[0084] ① In the refined finite element model analysis, the wind-induced response of the main structure is identified and extracted, and the overall displacement response is used as the overall wind-induced effect;

[0085] ②Based on the connection method and constraint conditions between the enclosure structure and the main structure, the overall displacement response is transformed into the displacement response of the enclosure structure boundary conditions, and this constraint displacement response is used as the applied load for the independent analysis model of the enclosure structure.

[0086] Step S4 specifically includes:

[0087] Representative building envelope components are selected as independent analysis models. By applying the displacement time history obtained in step S3 at the constraint boundary, the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the overall wind effect, is calculated. O .

[0088] Step S5 specifically includes:

[0089] ①Based on the dimensionless wind pressure coefficient time history data of the building surface with enclosure structure obtained in step S1, considering similarity theory and based on the scale effect of the enclosure components, the local wind load time history data applicable to the prototype size of the enclosure components is calculated, and relevant statistical analysis is performed.

[0090] ② Select an independent analysis model for the building envelope components, apply virtual boundary conditions, and based on existing design codes and the quasi-static indeterminate assumption, apply local wind loads to calculate the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the local wind effect. L .

[0091] Step S6 specifically includes:

[0092] ① By comparing the analysis results of the building envelope, the contributions of the overall wind effect and the local wind effect to the wind-induced structural effect of the building envelope can be calculated as follows:

[0093] ② When analyzing the contribution of structural effects, the most unfavorable situation is selected, that is, the extreme values ​​of the wind-induced response of structural components under various wind effects (overall, local and real) are analyzed as the object of analysis.

[0094] Step S7 specifically includes:

[0095] Based on existing design specifications, the parameters for the design wind load on the building envelope are adjusted.

[0096] Based on the contribution calculation results, the wind load correction factor for the building envelope design is obtained:

[0097] If the overall wind effect contribution γ is known... O Then the correction factor

[0098] If the contribution of the local wind effect γ is known... L Then the correction factor

[0099] Example 3

[0100] like Figure 1 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0101] Regarding the separation and extraction of the wind-induced response of components caused by overall and local wind effects, the structural wind load effect S caused by the overall wind effect can be selected based on the characteristics of the building envelope (structural stiffness, structural damping, connection with the main structure, etc.). O Or the structural wind load effect S caused by local wind effect L .

[0102] Even in the absence of physical wind tunnel testing conditions, but with the availability of numerical simulation conditions, the time history of wind load on the building surface in step S1 can also be obtained through computational fluid dynamics (CFD) numerical simulation.

[0103] Example 4

[0104] like Figures 2 to 6 As shown, a method for calculating the wind resistance of a building envelope considering the overall-local wind effect is presented. Taking a high-rise building with a circular cross-section and steel envelope as an example, the building is 120m high, the diameter of the circular cross-section is 15m, and the envelope is a thin-walled shell with a thickness of 12mm.

[0105] ① A geometric scale of 1:250 and a wind speed scale of 1:5 were used to simulate the flow field at a Class B site. A rigid synchronous pressure measurement model was designed, with 160 measuring points evenly distributed on the surface of the rigid model. The pressure measurement wind tunnel test model is as follows: Figure 2 As shown;

[0106] ② Using the intrinsic orthogonal decomposition method (POD), the first 30 modes are selected for expansion, such as... Figure 3 As shown; and the extended wind pressure time history data are applied to the refined finite element model to analyze and calculate the real wind-induced internal forces of the enclosure structure components;

[0107] ③ When considering the overall wind effect of the structure, the original cross-sectional model can be transformed into a lumped mass model. The wind pressure data of each floor measuring point of the rigid model can be integrated and transformed into the wind load of the prototype. The displacement response of the main structure under the overall wind effect can be analyzed and obtained. Based on the connection method between the enclosure structure and the main structure, the time history of the constraint displacement of the enclosure structure can be calculated. Figure 4 As shown;

[0108] ④ For the independent analysis model of the building envelope, constraint displacements are applied, and the wind-induced effect of the structure under the corresponding overall wind effect is obtained and compared with the actual wind-induced effect, such as... Figure 5 As shown, the corresponding contribution levels were analyzed, such as... Figure 6 As shown.

[0109] Comparative analysis revealed that, for the maximum axial stress of the enclosure structure components in the embodiments, the contribution of wind-induced internal forces caused by the overall wind effect is 60%-90%; for the minimum axial stress of the enclosure structure components in the embodiments, the contribution of wind-induced internal forces caused by the overall wind effect is 50%-75%. For the extreme values ​​of shear stress, the contribution is 45%-70%.

[0110] Working principle: Wind load data on the surface of a building with an envelope is obtained through physical experiments and numerical simulations; a refined finite element model is established, and the true wind-induced effect of the envelope is obtained through time history analysis; the constraint displacement response of the envelope caused by the response of the main structure is extracted from the refined finite element model; an independent analysis model of the envelope is established, and the wind-induced internal forces of the components caused by the overall wind effect are obtained under the constraint displacement; local wind loads are applied to the independent analysis model of the envelope to obtain the wind-induced internal forces of the components caused by the local wind effect; by comparing the results of the component internal force analysis, the contribution of the overall / local wind effect to the wind-induced internal forces of the envelope components is analyzed; and the design wind load parameters of the envelope are corrected according to existing design codes.

[0111] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0112] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for calculating the wind resistance of a building envelope considering overall-local wind effects, characterized in that: Includes the following steps: S1. Conduct atmospheric boundary layer flow field simulation and obtain wind load time history of buildings with enclosing structures through wind tunnel tests; S2. Establish a refined finite element model of the building considering the building envelope, and calculate the real wind-induced response of the building envelope components, including internal forces and displacements. S3. Extract the constraint displacement response of the enclosure structure caused by the response of the main structure in the refined finite element model; S4. Establish an independent analysis model of the enclosure structure, apply S3 to obtain the constraint displacement and obtain the wind-induced internal forces of the components caused by the overall wind effect; Step S4 specifically includes: Representative building envelope components are selected as independent analysis models. By applying the displacement time history obtained in step S3 at the constraint boundary, the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the overall wind effect, is calculated. O ; S5. Apply local wind loads to the independent analysis model of the enclosure structure to obtain the wind-induced internal forces of the components caused by local wind effects; S6. By comparing the component internal force analysis results of S2, S4, and S5, analyze the contribution of overall / local wind effects to the wind-induced internal forces of the building envelope components. S7. Based on existing design specifications, the parameters for the design wind load on the enclosure structure shall be corrected. Step S2 specifically includes: Establish a detailed finite element model of the building with an enclosure structure, including simulating the connection between the enclosure structure components and the main structure; Wind-induced response analysis is performed using the wind pressure time history data obtained in step S1. To ensure the accuracy of the analysis and calculation, the number of nodes in the finite element model for wind load application is usually greater than the number of measurement points in the rigid pressure test. The intrinsic orthogonal decomposition method is used to expand the wind load data information. In the formula, [R p [] represents the spatial covariance matrix of fluctuating wind pressure at known wind load data points; λ and [Φ] represent the eigenvalues ​​and eigenvectors of this covariance matrix, respectively, and the wind pressure p(x) at known wind load data points on the surface of the building envelope is given by [Φ]. i ,y j ,t) through the covariance eigenvector Φ at the data points k (x i ,y j ) and the principal coordinate system a of the POD mode k The expression (t) is used to characterize this, as shown in the following formula: Expanded wind load p e i (t) through the expanded eigenvector Φ e k and POD modal principal coordinate system a k The expression (t) is used to characterize this, as shown in the following formula: in, yes The specific feature vector values ​​are shown in the text, where k in the subscript represents the k-th POD feature mode, i represents the i-th point after expansion, and e in the superscript indicates expansion. The wind-induced response of the building envelope components was obtained using full-modal time history analysis, and this response was taken as the true wind-induced response S of the components. T ; Step S3 specifically includes: ① In the refined finite element model analysis, the wind-induced response of the main structure is identified and extracted, and the overall displacement response is used as the overall wind-induced effect; ②Based on the connection method and constraint conditions between the enclosure structure and the main structure, the overall displacement response is transformed into the displacement response of the enclosure structure boundary conditions, and this constraint displacement response is used as the applied load for the independent analysis model of the enclosure structure. Step S5 specifically includes: ①Based on the dimensionless wind pressure coefficient time history data of the building surface with enclosure structure obtained in step S1, considering similarity theory and based on the scale effect of the enclosure components, the local wind load time history data applicable to the prototype size of the enclosure components is calculated, and relevant statistical analysis is performed. ② Select an independent analysis model for the building envelope components, apply virtual boundary conditions, and based on existing design codes and the quasi-static indeterminate assumption, apply local wind loads to calculate the corresponding wind-induced response of the building envelope components, i.e., the wind-induced response S caused by the local wind effect. L ; Step S6 specifically includes: ① By comparing the analysis results of the building envelope, the contributions of the overall wind effect and the local wind effect to the wind-induced structural effect of the building envelope were calculated as follows: , ; ② When analyzing the contribution of structural effects, the most unfavorable situation is selected, that is, the extreme values ​​of the wind-induced response of structural components under various wind effects are analyzed as the object of analysis.

2. The method for calculating the wind resistance of building envelopes according to claim 1, characterized in that: Step S1 specifically includes: ① Determine the type of ground roughness based on the topographical environment of the building being calculated, and simulate the atmospheric boundary layer flow field according to relevant building wind tunnel standards; ② Determine a suitable geometric scaling ratio based on the building's dimensions, and fabricate a rigid test scaled-down model according to the structural shape; ③ Obtain the dimensionless wind pressure coefficient time history at the measuring point of the rigid model through synchronous pressure measurement test, and then convert it into wind pressure time history data of the prototype structure based on similarity theory and actual structural design wind speed.

3. The method for calculating the wind resistance of building envelopes according to claim 1, characterized in that: Step S7 specifically includes: Based on existing design specifications, the parameters for the design wind load on the building envelope are adjusted. Based on the contribution calculation results, the wind load correction factor for the building envelope design is obtained: If the overall wind effect contribution γ is known... O Then the correction factor ; If the contribution of the local wind effect γ is known... L Then the correction factor .

4. The method for calculating the wind resistance of building envelopes according to claim 1, characterized in that: The separation and extraction of component wind-induced responses caused by overall and local wind effects in steps S5 and S6 can be achieved by selecting the structural wind load effect S caused by the overall wind effect, based on the characteristics of the building envelope. O Or the structural wind load effect S caused by local wind effect L .

5. The method for calculating the wind resistance of building envelopes according to claim 1, characterized in that: In the absence of physical wind tunnel testing conditions, but with the availability of numerical simulation conditions, the time history of wind load on the building surface in step S1 is obtained through computational fluid dynamics numerical simulation.

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