An indirect acquisition method of wind load based on dynamic strain measurement of glass curtain wall nodes

Abstract

This invention discloses a method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes. By setting sensors at the locations corresponding to the curtain wall connection nodes on the connectors connecting the main structure of the high-rise building and the glass curtain wall system, when the glass panels of the curtain wall structure are subjected to wind load, the wind load is transmitted to the main structure through the connectors. Therefore, the strain of the sensors at the curtain wall connection nodes of the connectors can reflect the load transmitted by the connectors, that is, the load transmitted by the glass curtain wall. The local average wind pressure at the glass curtain wall connection nodes can be reflected through the load transmitted by the glass curtain wall, thereby indirectly obtaining the local average wind pressure on the surface of the high-rise building.

Description

Technical Field

[0001] This invention relates to the field of wind pressure acquisition technology for high-rise buildings, and in particular to an indirect method for acquiring wind load based on dynamic strain measurement of glass curtain wall nodes. Background Technology

[0002] In wind load studies of high-rise structures, accurate wind load information is a crucial prerequisite for all research. Whether it's structural wind-resistant design calculations, construction process control, or operational status monitoring, wind load is one of the most fundamental control indicators. The study of wind loads on high-rise structures is a comprehensive engineering project, such as... Figure 1 It demonstrates the basic framework for the study of wind loads on high-rise structures.

[0003] Existing research on the wind resistance of high-rise structures mainly focuses on wind pressure as the primary parameter, and the methods for obtaining this data currently include three main types: field measurement, wind tunnel experiments, and numerical simulation. Field measurement involves collecting and analyzing actual wind field environmental data at the engineering site using equipment such as wind pressure sensors. Wind tunnel experiments simulate the wind environment in the actual structure's environment, further considering the actual wind load characteristics of the structure by arranging wind pressure measuring points on a wind tunnel model. Numerical simulation is based on fluid dynamics theory, utilizes computers as tools, and employs numerical methods to simulate the interaction between wind and structure, finally extracting structural wind load information from the simulation results.

[0004] However, traditional methods for obtaining wind pressure in high-rise structures have the following drawbacks: on-site measurements of wind pressure sensors installed on the fully enclosed glass curtain wall surface of high-rise structures present certain construction difficulties; wind tunnel experiments are limited by the limitations of model experiments; and theoretical research on numerical simulation technology is still under development.

[0005] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0006] The main objective of this invention is to provide a method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes, aiming to solve the problem that it is difficult to obtain local wind pressure of high-rise buildings in the prior art.

[0007] To achieve the above objectives, the present invention provides a method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes. The method includes the following steps: obtaining strain information corresponding to the glass curtain wall connection nodes of a connector on a high-rise building and first data information of the connector, wherein the glass curtain wall connection node is the node connecting the main structure and the glass curtain wall system in the high-rise building; obtaining load information transmitted by the connector between the main structure and the glass curtain wall system based on the first data information and the strain information; obtaining second data information of the glass curtain wall system, and obtaining the local average wind pressure of the glass curtain wall system corresponding to the curtain wall connection node based on the second data information and the load information.

[0008] In one implementation, obtaining the strain information corresponding to the glass curtain wall connection node of the connector on the high-rise building and the first data information of the connector specifically includes: constructing a structural model of the glass curtain wall system, main structure and connector connected in the high-rise building; determining the actual measuring point position of the connector according to the structural model; and obtaining the dynamic strain of the high-rise building at the actual measuring point position.

[0009] In one implementation, the first data information includes the cross-sectional area of ​​the connection between the connector and the main structure; obtaining the load information transmitted by the connector between the main structure and the glass curtain wall system based on the first data information and the strain information specifically includes: calculating the stress of the high-rise building at the actual measuring point location based on the dynamic strain and the obtained elastic modulus of the connector; and calculating the horizontal load transmitted by the connector between the main structure and the glass curtain wall system based on the stress and the cross-sectional area.

[0010] In one implementation, the cross-sectional area is the projected area of ​​the connecting bolt at the glass curtain wall connection node in the direction of force; the step of calculating the horizontal load transmitted by the connector between the main structure and the glass curtain wall system based on the stress and the cross-sectional area specifically includes: when it is determined that the connection between the main structure and the glass curtain wall system through the connector is a mechanical transmission connection, calculating the horizontal load transmitted by the connector between the main structure and the glass curtain wall system under the mechanical transmission connection method based on the stress and the projected area.

[0011] In one implementation, calculating the horizontal load transmitted by the connector between the main structure and the glass curtain wall system based on the stress and the cross-sectional area specifically includes: when it is determined that the connection method between the main structure and the glass curtain wall system through the connector is an angle steel welding connection, calculating the horizontal load transmitted by the connector between the main structure and the glass curtain wall system under the angle steel welding connection method based on the stress and the cross-sectional area.

[0012] In one implementation, obtaining the second data information of the glass curtain wall system and, based on the second data information and the load information, obtaining the local average wind pressure of the glass curtain wall system corresponding to the curtain wall connection node specifically includes: obtaining the structural features of the glass curtain wall system and determining the panel area of ​​the glass curtain wall system that bears the wind pressure based on the structural features; and calculating the local average wind pressure experienced by the glass curtain wall system within the panel area corresponding to the actual measuring point location based on the panel area and the horizontal load.

[0013] In one implementation, the method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes further includes: obtaining the standard load value of the vertical structural surface of the high-rise building, and obtaining the first wind pressure data of the high-rise building according to the standard load value; obtaining the wind speed data of the high-rise building, and obtaining the second wind pressure data of the high-rise building according to the wind speed data; comparing the local average wind pressure, the first wind pressure data, and the second wind pressure data to obtain the evaluation result of the local average wind pressure of the high-rise building.

[0014] Furthermore, to achieve the above objectives, the present invention also provides a system for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes, wherein the system for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes includes:

[0015] The strain acquisition module is used to acquire strain information corresponding to the glass curtain wall connection node of the connector on the high-rise building and the first data information of the connector, wherein the glass curtain wall connection node is the node in the high-rise building where the main structure and the glass curtain wall system are connected.

[0016] The load transfer module is used to obtain the load information transferred by the connector between the main structure and the glass curtain wall system based on the first data information and the strain information.

[0017] The wind pressure acquisition module is used to acquire the second data information of the glass curtain wall system, and to obtain the local average wind pressure of the glass curtain wall system corresponding to the glass curtain wall connection node based on the second data information and the load information.

[0018] In addition, to achieve the above objectives, the present invention also provides a terminal, the terminal comprising: a memory, a processor, and a wind load indirect acquisition program based on dynamic strain measurement of glass curtain wall nodes stored in the memory and executable on the processor, wherein when the wind load indirect acquisition program based on dynamic strain measurement of glass curtain wall nodes is executed by the processor, the steps of the wind load indirect acquisition method based on dynamic strain measurement of glass curtain wall nodes as described above are implemented.

[0019] Furthermore, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a program for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes. When the program for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes is executed by a processor, it implements the steps of the method for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes as described above.

[0020] Beneficial Effects: This invention provides a method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes. By setting sensors at the locations corresponding to the glass curtain wall connection nodes on the connectors connecting the main structure of the high-rise building and the glass curtain wall system, when the glass panels of the curtain wall system are subjected to wind load, the wind load is transmitted to the main structure through the connectors via horizontal force. Therefore, the strain of the sensors at the curtain wall connection nodes of the connectors can reflect the load transmitted by the connectors, i.e., the load transmitted by the glass curtain wall. Furthermore, the load transmitted by the glass curtain wall can reflect the local average wind pressure at the glass curtain wall connection nodes, thereby indirectly obtaining the local average wind pressure on the surface of the high-rise building. This method allows for convenient installation of sensors on high-rise buildings to obtain strain and accurately reflects the local average wind pressure on high-rise buildings. Attached Figure Description

[0021] Figure 1 A flowchart outlining the basic research approach for wind load on high-rise structures using existing technologies.

[0022] Figure 2 This is a flowchart of a preferred embodiment of the method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes according to the present invention;

[0023] Figure 3 This is a simplified structure of a high-rise building glass curtain wall according to an embodiment of the present invention;

[0024] Figure 4 This is a mechanical transmission connection node in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a mechanical transmission connection node according to an embodiment of the present invention;

[0026] Figure 6An angle steel welded connection node glass curtain wall according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the angle steel welded connection node according to an embodiment of the present invention;

[0028] Figure 8 This is a high-rise building curtain wall system according to an embodiment of the present invention;

[0029] Figure 9 This is a simplified mechanical diagram of the mechanical transmission connection node according to an embodiment of the present invention;

[0030] Figure 10 This invention simplifies the mechanical structure of the angle steel welded connection nodes in this embodiment.

[0031] Figure 11 This is a layout diagram of the dynamic strain measurement system according to an embodiment of the present invention;

[0032] Figure 12 This is a physical diagram of the dynamic strain measurement system according to an embodiment of the present invention;

[0033] Figure 13 The measured dynamic strain of the curtain wall nodes on the east and north sides in this embodiment of the invention;

[0034] Figure 14 The measured dynamic strain of the west and south curtain wall nodes in this embodiment of the invention;

[0035] Figure 15 This invention relates to the transmission of loads to the glass curtain wall at each node in an embodiment of the invention.

[0036] Figure 16 This is a schematic diagram of the wind direction under the influence of strong monsoons according to an embodiment of the present invention;

[0037] Figure 17 This refers to the local average wind pressure at various measuring points on the top steel structure glass curtain wall in this embodiment of the invention.

[0038] Figure 18 This is a schematic diagram of the structure indirectly obtained from wind load measurement based on dynamic strain of glass curtain wall nodes, according to an embodiment of the present invention.

[0039] Figure 19 This is a schematic diagram of a terminal according to an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are merely possible technical implementations of this invention and not all possible implementations. Based on the embodiments of this invention, those skilled in the art can obtain other embodiments without creative effort, and these embodiments are also within the protection scope of this invention.

[0041] like Figure 1 As shown, on-site measurement refers to collecting and analyzing actual wind field environmental data by installing equipment such as wind pressure sensors at the engineering site. However, installing sensors on the outer surface of curtain wall glass does not meet safety requirements and is also inconvenient to install. In other words, on-site measurement presents certain construction difficulties in installing wind pressure sensors on the fully enclosed glass curtain wall surface of high-rise structures. Wind tunnel testing simulates the wind environment in the actual structure's environment and further considers the actual structural wind load characteristics by arranging wind pressure measurement points on the wind tunnel model. However, wind tunnel testing is limited by the limitations of model testing, making it difficult to obtain wind pressure data for simulating high-rise buildings. Numerical simulation is based on fluid dynamics theory and uses computers as tools to simulate the interaction between wind and structure using numerical methods. Finally, structural wind load information is extracted from the simulation results. However, numerical simulation technology currently struggles to obtain local wind pressure data for high-rise buildings.

[0042] To address the difficulty in obtaining local wind pressure data for high-rise buildings mentioned above, this application provides a method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes. In this method, sensors are installed at the locations corresponding to the curtain wall connection nodes on the connectors connecting the main structure and the curtain wall structure of the high-rise building. When the curtain wall glass panels are subjected to wind pressure, the wind pressure is transmitted horizontally to the main structure through the connectors. Therefore, the strain of the sensor at the curtain wall connection node reflects the load transmitted by the connector, and the load reflects the local wind pressure on the curtain wall glass panels corresponding to the curtain wall connection node. This method allows for convenient installation of sensors on high-rise buildings to obtain strain and accurately reflects the local wind pressure, simplifying the operation of obtaining local wind pressure data for high-rise buildings. Thus, it solves the technical problem of the difficulty in obtaining local wind pressure data for high-rise buildings in related technologies.

[0043] This invention proposes an indirect method for obtaining local wind pressure in high-rise buildings under wind loads, based on the dynamic strain of curtain wall nodes measured by fiber optic strain gauges. This method can be applied to the long-term monitoring of actual high-rise structures, reflecting the surface wind pressure of high-rise buildings in real time, and providing a new supplementary means for the study of structural wind loads.

[0044] This invention starts with the basic structural system of high-rise building glass curtain wall structure and conducts theoretical analysis. By studying the force transmission path of wind load in high-rise structure, and based on the dynamic strain of the connection node between the main structure and the curtain wall, it proposes an indirect method for obtaining horizontal load based on the dynamic strain of the connection node of various types of curtain walls. Finally, the method is applied to obtain the local wind pressure of high-rise structure.

[0045] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0046] The preferred embodiment of the present invention describes a method for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes. This method is applied to high-rise buildings, which include a curtain wall structure, a main structure, and connectors at a certain height. The outer curtain wall structure is connected to the inner main structure via connectors. Figure 2 As shown, the method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes includes the following steps:

[0047] Step S101: Obtain the strain information corresponding to the glass curtain wall connection node of the connector on the high-rise building and the first data information of the connector, wherein the glass curtain wall connection node is the node in the high-rise building where the main structure and the glass curtain wall system are connected.

[0048] It should be noted that, through the classification and research of high-rise glass curtain wall systems, most types of glass curtain wall systems consist of two main parts: the curtain wall structure and the connecting components to the main structure. Their simplified structures are as follows: Figure 3 As shown, currently, the main methods for connecting the curtain wall structure to the main structure are angle steel welding and mechanical transmission. Different methods inevitably lead to different force transmissions. Therefore, specific mechanical analysis is required for each connector when monitoring its strain. The selection of strain measurement points and force transmission analysis for the angle steel welded connection node and the mechanical transmission connection node of this invention are described below:

[0049] Mechanical transfer connection nodes: Mechanical transfer connection nodes are commonly used in large high-rise structural systems. Specific structures include... Figure 4As shown, its working principle is as follows: First, channel steel components are welded onto the main structure to form a construction platform. Then, angle steel platforms are welded onto the outer facade of the channel steel. Together, they form a steel bracket platform (as part of the curtain wall structure), providing an operating platform for the connection of the curtain wall frame. Next, the connecting channel steel is welded onto the steel bracket platform. Then, the curtain wall frame structure is fixed to the connecting steel plate with three short bolts. Finally, the connecting channel steel and the connecting steel plate are tightened with long bolts (connecting bolts) to form a force transmission path. Because mechanical transmission connection nodes use multiple components, they have strong adaptability to curtain wall glass of various shapes. The connecting steel plate (i.e., as a connector) is the direct transmission component for wind loads from the curtain wall frame to the main structure, and its strain is relatively large. Therefore, fiber optic strain sensors are installed on the connecting steel plate to subsequently calculate the horizontal load value transmitted by the mechanical transmission connection node. The key force transmission component in the mechanical transmission connection node, the connecting steel plate, is abstracted and simplified as follows: Figure 5 The model shown is used to deduce the magnitude of the load transferred by the glass curtain wall from the strain at the measuring points in subsequent steps.

[0050] Angle steel welded connection nodes: The working principle of angle steel welded connection nodes is to first fasten the angle steel components (i.e., connectors) to the frame structure columns or beams (i.e., curtain wall structure) with bolts (connecting bolts), and then weld the angle steel to the main structure, such as... Figure 6 As shown. Therefore, wind load is transferred from the frame to the main structure through the deformation of the angle steel caused by the compression of the bolts, and then transferred to the main structure through the welds. The angle steel is the inevitable path for load transfer, and the bolt positions are also locations with relatively large strain. Therefore, fiber optic strain sensors are placed on the angle steel cross-section at the positions aligned with the bolts to estimate the load transferred by the angle steel components in subsequent steps. The angle steel welded connection nodes are simplified as follows: Figure 7 The model shown is used to deduce the magnitude of the load transferred by the glass curtain wall from the strain at the measuring points in subsequent steps.

[0051] In this embodiment, a fiber Bragg grating strain sensor is installed on the connector. It is understood that the present invention uses a distributed fiber Bragg grating synchronous acquisition system, but it is not limited to this. Other strain acquisition schemes can also be used instead. However, considering the requirements of monitoring sensitivity, anti-electromagnetic interference and long-term monitoring, the fiber Bragg grating acquisition method is a more suitable solution. There are many specific types of glass curtain wall nodes. The present invention has specifically explained two types of connection nodes, but other types of connection nodes can also use the method of the present invention to indirectly obtain the local average wind pressure.

[0052] The wind load indirect acquisition method based on dynamic strain measurement of glass curtain wall nodes of this invention can achieve dynamic acquisition and long-term tracking of local average wind pressure in high-rise structures. This invention utilizes a long-term dynamic strain monitoring system to collect dynamic strain signals of each curtain wall node under strong monsoon conditions, obtaining the local average wind pressure at each curtain wall node. The applicability of the wind load indirect acquisition method in actual high-rise structures is verified based on the local average wind pressure obtained from other wind load research methods. Figure 8 As shown, this high-rise building is a wind-sensitive building, located in a subtropical monsoon climate zone where typhoons are frequent in summer. Therefore, it is necessary to conduct long-term wind pressure monitoring on the building structure. The building's curtain wall structure adopts a vertical exposed and horizontal concealed frame support system. The east and west facades are conical planes, while the north and south facades are uniformly wide arc-shaped contracting surfaces, forming a fully enclosed external envelope structure. The overall shape resembles a waterfall, and the curtain wall structure is stably connected to the main structure through a series of complex connection nodes.

[0053] In one implementation, a structural model is constructed connecting the glass curtain wall system, main structure, and connectors of a high-rise building. The actual measuring point locations of the connectors are determined based on the actual structural characteristics of the structural model. The dynamic strain of the high-rise building at these actual measuring point locations is then obtained. It is understood that this structural model can reflect the actual structural characteristics, thus allowing for the selection of locations that facilitate construction and installation as the actual measuring point locations based on these characteristics.

[0054] Specifically, the measurement principle of the fiber optic strain sensor is as follows:

[0055] Based on the principle of fiber Bragg grating sensing systems, the strain value of the fiber Bragg grating considering temperature compensation can be calculated using formula (1):

[0056]

[0057] In the formula ε i —The strain value (με) measured by the sensor at time i;

[0058] λ i —The output wavelength (nm) of the strain sensor at time i;

[0059] λ0 — the zero-point wavelength value (nm) of the strain sensor;

[0060] σ T —Temperature compensation ratio coefficient;

[0061] λ Ti —Temperature compensation sensor output wavelength value (nm) at time i;

[0062] λ T0 —The zero-point wavelength value (nm) of the temperature compensation sensor;

[0063] k — coefficient of the first term of the strain sensor (nm / με).

[0064] For short-term laboratory tests, the temperature effect can be ignored during the test and calculation process, and there is no need to install temperature compensation sensors. In this case, the fiber optic strain value at the measuring point can be calculated according to formula (2):

[0065]

[0066] In the formula ε i —The strain value (με) measured by the sensor at time i;

[0067] λ i —The output wavelength (nm) of the strain sensor at time i;

[0068] λ0 — the zero-point wavelength value (nm) of the strain sensor;

[0069] k — taken as 0.001 (nm / με).

[0070] The present invention provides a sensor (fiber optic strain sensor) installed on the connector corresponding to the curtain wall connection node. This sensor can obtain the strain at the corresponding measuring point of the curtain wall connection node on the high-rise building in the actual environment. This facilitates the subsequent reflection of the stress borne by the connector through the strain of the connector, and the calculation of the horizontal load on the curtain wall glass panel of the curtain wall structure transmitted by the connector to the main structure. Finally, the wind pressure on the curtain wall glass panel at the measuring point of the connector is calculated, that is, the local average wind pressure of the high-rise building is finally obtained.

[0071] This invention obtains the strain corresponding to the curtain wall connection node by setting a strain sensor on the connector. The installation position of the strain sensor takes into account the convenience of installation, the accuracy of the strain measurement, and the reliability of the installation, thereby ensuring the accuracy of subsequent wind load estimation and making it easier to obtain the local average wind pressure.

[0072] Step S102: Based on the first data information and the strain information, obtain the load information transmitted by the connector between the main structure and the glass curtain wall system.

[0073] In some implementations, the first data information includes the cross-sectional area of ​​the connection between the connector and the main structure (i.e., the projected area of ​​the connecting bolt in the direction of force); after determining the dynamic strain corresponding to the curtain wall connection node on the connector, the stress of the high-rise building at the actual measuring point is calculated based on the dynamic strain and the obtained elastic modulus of the connector; based on the stress and the cross-sectional area, the horizontal load transmitted by the connector between the main structure and the curtain wall structure is calculated.

[0074] Specifically, the cross-sectional area is the projected area of ​​the connecting bolts at the curtain wall connection node in the direction of force; when it is determined that the connection between the main structure and the curtain wall structure via the connector is a complex connection (mechanical transmission connection), for Figure 9 The mechanical transfer connection node shown has connecting steel plates (connectors) that are highly symmetrical in both the horizontal and vertical directions, so the effect of eccentricity can be ignored. The horizontal load transferred from the glass curtain wall structure is applied to the main structure through long bolts (connecting bolts) connected to the channel steel. In summary, the load transferred between the glass curtain wall system and the main structure can be simplified into a single horizontal concentrated load, such as... Figure 9 As shown, based on the stress and the projected area, the horizontal load transmitted between the connector and the glass curtain wall system under the mechanical transmission connection method is calculated. It is understood that the connection method is determined to be either mechanical transmission or angle steel welding (basic connection, not limited to angle steel) based on the structural model.

[0075] against Figure 9 For the mechanical transmission connection node shown, the stress at the measuring point can be obtained from the monitored strain:

[0076] σ²=E·ε² (3)

[0077] In the formula, σ2 represents the dynamic stress at the measuring point (N / mm²). 2 );

[0078] E – Elastic modulus of steel (N / mm²) 2 );

[0079] ε2 — Dynamic strain at the measuring point.

[0080] From the stress analysis of the connecting steel plate components, the formula for calculating the stress at the measuring point can be obtained as shown in formula (4):

[0081]

[0082] In the formula, Q2 represents the horizontal force (N) transmitted by the connecting steel plate.

[0083] S — Projected area of ​​the long bolt on the vertical plane (m²) 2 ).

[0084] Solving formula (4) yields the horizontal force transmitted by the connecting steel plates:

[0085] Q2=ε2·E·S (5)

[0086] Specifically, the first data information includes the distance between the curtain wall connection node of the connector and the centerline of the connector, as well as the contact area between the connector and the main structure; Regarding Figure 7The angle steel welded connection node shown (angle steel welded connection method) connects the glass curtain wall system and the connecting angle steel (connector) through two bolts (connecting bolts). The load on the curtain wall frame structure is transferred to the connecting angle steel through the bolts. Since the centerlines of the two bolts are symmetrical about the horizontal neutral axis, and this invention primarily focuses on the magnitude of the horizontal load transferred from the connection node to the main structure, the load transferred between the curtain wall frame structure and the main structure can be simplified to a single horizontal concentrated load, such as... Figure 10 As shown, during the operation phase, the self-weight of the curtain wall frame system borne by the angle steel connection node is a dead load. During this phase, the strain at the angle steel is relatively small, and the strain of the angle steel component is mainly caused by the wind load under the operation state.

[0087] against Figure 10 For the angle steel welded connection node shown, determine the moment of inertia of the section about the perpendicular centroidal axis:

[0088]

[0089] In the formula I y —Moment of inertia of the cross section about the perpendicular centroidal axis (mm) 4 );

[0090] t — Angle steel thickness (mm);

[0091] h — Height of the angle steel (mm);

[0092] b — Width of angle steel (mm).

[0093] The stress at the measuring point can be obtained from the monitored strain:

[0094] σ1=E·ε1 (7)

[0095] In the formula, σ1 is the stress at the measuring point (N / mm). 2 );

[0096] ε1 — Strain at the measuring point;

[0097] E – Elastic modulus of steel (N / mm²) 2 ).

[0098] For the stress analysis of the angle steel member, the strain at the measuring point mainly consists of two parts: one is the axial compressive strain caused by the horizontal load, and the other is the tensile strain caused by the eccentric bending moment generated by the horizontal load. Therefore, the formula for calculating the stress at the measuring point can be obtained as shown in formula (8):

[0099]

[0100] In the formula, Q1 represents the horizontal force (N) exerted by the curtain wall frame structure on the angle steel member.

[0101] A — Contact area between the connecting angle steel and the main structure (m²) 2 );

[0102] h0 — Projected distance (m) between the transferred load and the strain measurement point on the horizontal plane.

[0103] Solving formula (8) yields the horizontal force exerted by the curtain wall frame structure on the angle steel members:

[0104]

[0105] Therefore, we can conclude that:

[0106]

[0107] Therefore, formula (9) can be simplified to the following form:

[0108] Q1=m·E·ε1 (11)

[0109] Understandably, this invention analyzes the wind load transmission mechanism in high-rise structures and, based on angle steel welded connection nodes and mechanically transmitted connection nodes, proposes a method for obtaining the wind load transmitted by glass curtain wall using the dynamic strain of glass curtain wall nodes. Therefore, in practical applications of high-rise structures, based on the above principles, fiber optic strain sensors can be used to complete distributed synchronous acquisition at a limited number of measuring points, and this can be used as a basis to indirectly obtain the local average wind pressure at measuring points on the surface of the high-rise building. Since wind pressure is also an important indicator for evaluating wind load in the wind-resistant design of engineering structures, this invention's convenient method for indirectly obtaining wind pressure on the building surface can lay the foundation for subsequent work.

[0110] The present invention provides a method for calculating the load transferred at the connection nodes of glass curtain walls, including the exploration of a mechanical model of the glass curtain wall structural system.

[0111] Step S103: Obtain the second data information of the curtain wall structure, and based on the second data information and the load information, obtain the local average wind pressure of the glass curtain wall system corresponding to the curtain wall connection node.

[0112] In some implementations, the structural characteristics of the glass curtain wall system are obtained, and the panel area that the glass curtain wall structure can withstand wind pressure is determined based on the structural characteristics; based on the panel area and the horizontal load, the local average wind pressure on the curtain wall structure corresponding to the actual measuring point location within the panel area is calculated.

[0113] Specifically, the long-term dynamic strain monitoring system for high-rise building curtain wall nodes can acquire the transmitted load at each glass curtain wall node. Through stress analysis, the transmitted load of each glass curtain wall is equivalent to the wind pressure borne by the curtain wall glass panels within a certain range. The specific area should be determined according to the characteristics of the specific building structure. Generally, it is the sum of the areas of the four glass panels around the node. The horizontal transmitted load of the curtain wall connection node can be made equal to the wind load within the area of ​​the curtain wall glass panels with area D, as shown in formula (12):

[0114] Q = W D (12)

[0115] In the formula, Q represents the load transferred by the glass curtain wall (N).

[0116] W D —Wind load within the area of ​​the curtain wall glass panel with area D

[0117] The wind pressure within the area of ​​the curtain wall glass panel of area D can be obtained from the relationship between force and pressure, as shown in formula (13):

[0118]

[0119] In the formula, p represents the local wind pressure at the measuring point (Pa).

[0120] D — Equivalent area of ​​local wind pressure on the glass panel (m²) 2 ).

[0121] After step S103, the method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes further includes: obtaining the load standard value of the vertical structural surface of the high-rise building, and obtaining the first wind pressure data of the high-rise building according to the load standard value; obtaining the wind speed data of the high-rise structure, and obtaining the second wind pressure data of the high-rise building according to the wind speed data; comparing the local wind pressure, the first wind pressure data and the second wind pressure data to obtain the evaluation result of the local wind pressure of the high-rise building.

[0122] This invention calculates the theoretical range of surface wind pressure at the measuring point by combining the calculation principle of wind pressure on building surfaces in the standard, and / or obtains the reasonable range of wind pressure at the measuring point by converting the measured wind speed data of the meteorological station. Then, the actual wind pressure estimate obtained by the method proposed in this section is compared with the reasonable theoretical range obtained by the above two methods to determine the accuracy of the wind pressure acquisition method for high-rise structures.

[0123] Specifically, the accuracy of the method is evaluated by comparing the wind pressure estimated by the method proposed in this patent with the actual wind pressure. However, as described in the current research, most existing high-rise building structures use fully enclosed glass curtain walls. It is technically difficult to install wind pressure sensors on the outer surface of the curtain wall of high-rise structures to measure the wind pressure on the building surface. Based on this, this section will compare the theoretical wind pressure value calculated by the standard and the wind pressure converted from meteorological station data with the wind pressure estimated by the method proposed in this paper. The first method is to calculate the standard value of wind load perpendicular to the surface of the building according to the "General Specification for Engineering Structures". It is determined by considering the increase effect of wind load pulsation based on the product of basic wind pressure, wind pressure height variation coefficient, wind load shape coefficient, terrain correction coefficient and wind direction influence coefficient. The specific calculation method is shown in formula (14):

[0124] w k =αβ gz η B μ S μ Z w0 (14)

[0125] In the formula w k —Standard value of wind load (kN / m) 2 );

[0126] α — Wind direction influence coefficient;

[0127] β gz —Wind gust coefficient of the building envelope;

[0128] η B —Terrain correction factor;

[0129] μ S —Wind load shape coefficient;

[0130] μ Z —Wind pressure height variation coefficient;

[0131] w0 — Basic wind pressure (kN / m) 2 ).

[0132] The basic wind pressure is calculated based on the basic wind speed value; the wind pressure height variation coefficient is determined according to the local ground roughness; the wind load shape coefficient is related to the building shape and surrounding interference; the terrain correction coefficient is taken as 1.0 for areas without special terrain such as peaks and valleys; the wind direction influence coefficient is taken as 1.0 when the experimental observation period is less than 15 years; the minimum limit of the wind load amplification factor should be calculated according to formula (15).

[0133]

[0134] The second method first obtains measured wind speed and pressure data from surrounding meteorological stations from the local meteorological bureau. However, wind speed and pressure are greatly affected by the height of the measuring point. Since the wind speed and pressure measured by the meteorological station are values ​​at the height of the meteorological station, there is a significant difference between them and the wind speed and pressure measured at the location by the wind pressure indirect acquisition system. Therefore, it is necessary to convert the wind speed and pressure at the height of the meteorological station into wind speed and pressure data at the measuring point. The first step is to calculate the wind speed at the height of the measuring point based on the wind speed at the height of the meteorological station. The relationship between wind speed and height is shown in formula (16):

[0135]

[0136] In the formula, V represents the wind speed at height H (m / s).

[0137] V0 — Wind speed at height H0 (m / s);

[0138] H — the desired height (m);

[0139] H0 — Known wind speed at altitude (m);

[0140] n – Coefficient of surface friction.

[0141] The coefficient of friction of the ground surface ranges from 0.1 to 0.4. The closer the value is to 0.1, the smaller the surface roughness, and the closer it is to 0.4, the larger the surface roughness.

[0142] The second step is to calculate the wind pressure at the height by using the wind speed at the height obtained by formula (16). The relationship between wind pressure and wind speed is shown in formula (17).

[0143]

[0144] Where W is the wind pressure (kN / m³). 2 );

[0145] V – Wind speed (m / s).

[0146] By comparing the values ​​of the theoretical wind pressure calculated by Method 1, the wind pressure at the measuring point converted by Method 2, and the wind pressure estimated by the indirect acquisition method, the correctness and rationality of the estimated wind pressure can be judged.

[0147] This invention establishes a dynamic strain measurement system for glass curtain wall nodes in high-rise structures, which enables engineering applications of indirect acquisition of local average wind pressure based on dynamic strain measurement of glass curtain wall nodes, and proposes an evaluation method for the effect of indirect acquisition of local average wind pressure.

[0148] The specific implementation of this invention will be described below with reference to a specific application scenario. See also... Figures 8-19In this specific application scenario, this embodiment implements a method for obtaining local average wind pressure based on dynamic strain measurement of glass curtain wall nodes through the following steps.

[0149] K1. To investigate the impact of wind load on high-rise structures under operational conditions, an indirect method for obtaining local average wind pressure was established. A distributed synchronous acquisition dynamic strain long-term monitoring system was installed on the curtain wall connection node of the 96th floor of a high-rise building. The system mainly consists of fiber optic strain sensors, a fiber optic signal demodulator, and acquisition equipment. The fiber optic strain sensors are connected in parallel to the same demodulator for synchronous acquisition to facilitate data processing. Real-time online signal acquisition is achieved through the SHPS-FBG-F acquisition program, and remote control can be achieved with the help of third-party software.

[0150] The dynamic strain measurement system mainly includes 22 measuring points, distributed at the curtain wall nodes on the 96th floor of the structure. The test floor is 402.3m high. Within the top steel structure area, there are six truss columns on the north and south sides of the test floor plane. The curtain wall structure is connected to each truss column through mechanical transfer connection nodes. There are 5 mechanical transfer connection nodes on the beams between two adjacent truss columns, which are connected to the glass curtain wall system. There are only two corner columns on the east and west sides, and there are 11 mechanical transfer connection nodes on the beams between the corner columns.

[0151] Considering the overall monitoring objectives, construction conditions, and economic requirements, and in order to comprehensively understand the wind load characteristics within the test layer area, connection nodes were ultimately selected at the two corner columns in the northeast and southwest corners, connection nodes were selected at the truss columns on the north and south sides, and four connection nodes were symmetrically selected on the east and west sides, mainly considering construction conditions. The instrument installation layer elevation and the planar layout of the measuring points are shown in the diagram below. Figure 11 As shown, measuring points 1 and 2 are the connection nodes between the curtain wall structure and the corner columns of the top steel structure, measuring points 3 to 14 are the connection nodes between the curtain wall structure and the truss columns of the top steel structure, and measuring points 15 to 22 are the connection nodes between the curtain wall structure and the beams.

[0152] The curtain wall connection nodes of this high-rise building are mechanically connected. Through stress analysis of the nodes, fiber Bragg grating strain sensors were installed on angle steel fixed to the curtain wall system. Two dynamic strain sensors were arranged at each measuring point. Simultaneously, ten fiber Bragg grating temperature sensors were evenly distributed throughout the 96th-floor curtain wall nodes to eliminate the additional influence of temperature on the fiber Bragg grating strain sensors. The fiber Bragg grating strain sensors are connected to a demodulator via transmission cables. The fiber Bragg grating demodulator and acquisition equipment are located in the northeast corner of the experimental floor. Specific on-site installation information is as follows: Figure 12 As shown.

[0153] This experiment uses a fiber Bragg grating demodulator with 32 channels, each capable of stably acquiring data from up to 6 sensors. Therefore, this experiment selects to connect 4 or 5 sensors in series to the fiber Bragg grating demodulator to save acquisition channels and obtain more measurement point data. The strain position is represented as follows: Figure 12 As shown, for each curtain wall node facing the outside of the structure, the left side is position 1 and the right side is position 2.

[0154] The load transmitted at each node was determined by measuring the dynamic strain at the nodes, and then the local wind pressure at the measuring point was obtained from the load transmitted at the nodes. The local area experienced northeasterly winds of force 4-6 on October 18, 2022. Meteorological information is shown in Table 1.

[0155] Table 1. 24-hour weather data for the location of the structure on October 18, 2022.

[0156]

[0157] The aforementioned dynamic strain measurement system collected measured dynamic strain data from 22 curtain wall nodes under the influence of a strong monsoon on October 18, 2022. The structure was exposed to northeasterly winds that day; therefore, the main windward sides of the structure were the east and north. The measured dynamic strain data for the curtain wall connection nodes on the east and north sides are as follows: Figure 13 As shown. Strain data for the measuring points on the south and west sides of the leeward side are as follows. Figure 14 As shown, the values ​​exhibit a clear temperature periodicity, thus it can be inferred that the strain at the western and southern nodes is mainly caused by temperature effects.

[0158] K2. Based on the above measured dynamic strain data, the transferred load of each connecting steel plate is obtained by formula (19). Then, the transferred loads of the two connecting steel plates of the same curtain wall node are superimposed to obtain the transferred load of each curtain wall node. The glass curtain wall transferred load of each node on the windward side of the structure under the action of northeast wind is as follows: Figure 15 As shown.

[0159] Q i =E·ε i ·S (19)

[0160] In the formula Q i —The glass curtain wall transmits loads (N);

[0161] E – Elastic modulus of steel (N / mm²) 2 );

[0162] ε i —Strain at the measuring point;

[0163] S — Projected area of ​​the long bolt on the vertical plane (mm²) 2 ).

[0164] from Figure 15As can be seen, the load transmitted at most nodes in the north measuring points is compressive, with only node 8, closest to the west, experiencing tensile force. Figure 11 The plan view of the high-rise structure shows that the north curtain wall is parallel to the east-west central axis of the structure in the center, and gradually tapers inward on both sides, giving the entire north curtain wall an approximately arc shape. From this, it can be determined that the wind load direction is approximately orthogonal to the eastern half of the north curtain wall. Therefore, nodes 3, 4, 5, and 6, located in the middle and eastern half of the north curtain wall, are subjected to pressure. Node 7 in the western half is relatively close to the center, and the angle between the wind load and the curtain wall at that point is not too small, so node 7 is also subjected to pressure. However, at node 8, the angle between the wind load and the outer facade of the curtain wall is smaller, which can be regarded as blowing parallel to the glass surface of the curtain wall. Therefore, node 8 exerts an attractive force on the glass panel of the curtain wall, and the load transferred at node 8 is a tensile force.

[0165] The loads transferred at the eastern measuring points are mostly tensile, with only node 15, closest to the north, exhibiting compressive stress. The wind load blows vertically towards the northeast corner, pressing down on node 15 before blowing south along the exterior of the eastern glass curtain wall. Therefore, the wind load at nodes 16, 17, and 18 is approximately parallel to the glass curtain wall, generating suction. The higher the wind speed, the greater the suction outside the eastern curtain wall, applying tensile stress to the eastern curtain wall nodes. In summary, the northern measuring point primarily bears compressive stress, while the eastern measuring point experiences tensile stress, specifically as follows... Figure 16 As shown.

[0166] On that day, the average wind load on the structure was perpendicular to node 5. Therefore, based on node 5, the relationship between wind speed, dynamic strain of glass curtain wall connection nodes and load transferred by glass curtain wall was analyzed, as shown in Table 2.

[0167] Table 2 Comparison of Load Transfer Results for Glass Curtain Wall

[0168]

[0169] K3. Based on the estimated loads transferred by the glass curtain wall at each node, determine the wind pressure at each measuring point on the top steel structure of the high-rise building. Since the wind collected on October 18, 2022 was from the northeast, the wind pressure on the east and north sides of the structure will only be discussed below.

[0170] As can be seen from the relationship between force and pressure, in order to obtain the local average wind pressure at each measuring point of the glass curtain wall, it is necessary to first determine how much wind pressure is represented by the load transmitted by each curtain wall connection node on the glass panel.

[0171] After determining the wind pressure area at each measuring point, the wind load within the glass panel of the curtain wall with area Di can be equal to the transmitted load of each curtain wall node. Then, the wind pressure at each measuring point of the top steel structure glass curtain wall can be obtained using formula (20).

[0172]

[0173] In the formula p i —Wind pressure (Pa) at each measuring point of the top steel structure glass curtain wall;

[0174] W Di —Area is D i The wind load (N) experienced within the glass panel area of ​​the curtain wall.

[0175] D i —Area of ​​wind pressure effect (m²) 2 ).

[0176] Based on the structural type and mechanical characteristics of the high-rise building, the wind pressure area Di was determined. As can be seen from the above introduction, the high-rise building adopts a top arch truss structure above the 94th floor, with its column bases hinged to the outer frame columns of the main structure, while the curtain wall structure is connected to the top steel main structure through a series of complex connection nodes.

[0177] The dynamic strain measurement system for the high-rise structure is installed on the 96th floor. The 96th floor has 88 curtain wall connection nodes, exhibiting a clear symmetry. Therefore, under wind load, the stress on each curtain wall connection node is roughly the same; that is, the force on each glass panel is shared by the four surrounding connection nodes. Thus, the wind pressure area corresponding to the measurement point on the 96th floor is the area of ​​the four glass panels surrounding each node, which is 6.48 m². 2 .

[0178] Based on the estimated load transferred at the glass curtain wall nodes and the determined wind pressure area from the previous section, substituting them into formula (20), the local average wind pressure at each measuring point of the top steel structure glass curtain wall can be calculated, as shown in the figure. Figure 17 As shown.

[0179] from Figure 17 As can be seen, on October 18, 2022, most of the measuring points on the north side of the structure were subjected to pressure, exhibiting negative wind pressure, with a maximum negative wind pressure of -5.83 kPa. Only measuring point No. 8 showed positive wind pressure, with a maximum positive wind pressure of 1.45 kPa. The main reason for this is likely that measuring point No. 8 is located near the northwest corner of the structure, where the actual wind field is complex, with wind vortices present and the wind load flowing parallel to the glass panel. As a result, the wind flows rapidly and parallel to the outer surface of the glass panel, generating a large suction force, which causes the curtain wall connection node to be subjected to tensile force.

[0180] Most of the measuring points on the east side are subjected to tensile forces, exhibiting positive wind pressure, with a maximum positive wind pressure of 2.27 kPa. Only measuring point 15 is subjected to compressive forces, exhibiting negative wind pressure, with a maximum negative wind pressure of -3.65 kPa. The main reason for this is the same as that of measuring point 8 on the north side. Measuring point 15 is also located at the northeast corner of the structure. Generally, the wind environment at the corner of the structure is more complex, and the direction of the wind load has multiple possibilities due to the influence of wind vortices. Therefore, considering the above reasons, it is more likely to generate different load characteristics at this point than at other measuring points.

[0181] Furthermore, such as Figure 18 As shown, based on the above-mentioned method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes, the present invention also provides a system for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes, comprising:

[0182] The strain acquisition module 501 is used to acquire strain information corresponding to the curtain wall connection node of the connector on the high-rise building and the first data information of the connector, wherein the curtain wall connection node is the node where the main structure and the curtain wall structure are connected in the high-rise building.

[0183] The load transfer module 502 is used to obtain the load information transferred by the connector between the main structure and the curtain wall structure based on the first data information and the strain information.

[0184] The wind pressure acquisition module 503 is used to acquire the second data information of the curtain wall structure, and to obtain the local wind pressure of the curtain wall structure corresponding to the curtain wall connection node based on the second data information and the load information.

[0185] Furthermore, such as Figure 19 As shown, based on the above-described method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes, this invention also provides a terminal. The terminal includes a memory 602, a processor 601, and a program for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes stored in the memory and executable on the processor. The processor 601 and the memory 602 are connected via a bus 603. When the program for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes is executed by the processor, it implements the steps of the method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes as described above.

[0186] It should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The memory may include high-speed RAM, and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0187] Furthermore, based on the above-described method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes, the present invention also provides a computer-readable storage medium storing a program for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes. When the program for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes is executed by a processor, it implements the steps of the method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes as described above.

[0188] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0189] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0190] One embodiment of this application provides a computer program product, including a computer program that, when executed by a processor, implements the features described in this application. Figure 2 and Figure 3The corresponding embodiments provide a method for obtaining local wind pressure based on dynamic strain measurement of curtain wall nodes.

[0191] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0192] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes, characterized in that, The method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes includes: The strain information corresponding to the glass curtain wall connection node of the connector on the high-rise building and the first data information of the connector are obtained, wherein the glass curtain wall connection node is the node in the high-rise building where the main structure and the glass curtain wall system are connected. Based on the first data information and the strain information, the load information transmitted by the connector between the main structure and the glass curtain wall system is obtained; The second data information of the glass curtain wall system is obtained, and the local average wind pressure of the glass curtain wall system corresponding to the curtain wall connection node is obtained based on the second data information and the load information. The acquisition of strain information corresponding to the glass curtain wall connection nodes of the connectors on the high-rise building and the first data information of the connectors specifically includes: Construct a structural model connecting the glass curtain wall system, main structure, and connectors in a high-rise building; The actual measuring point positions of the connector are determined based on the structural model. The dynamic strain of the high-rise building at the actual measuring point location is obtained; The first data information includes the cross-sectional area of ​​the connection between the connector and the main structure; The step of obtaining the load information transmitted by the connector between the main structure and the glass curtain wall system based on the first data information and the strain information specifically includes: Based on the dynamic strain and the elastic modulus of the connector, the stress of the high-rise building at the actual measuring point is calculated. Based on the stress and the cross-sectional area, calculate the horizontal load transmitted by the connector between the main structure and the glass curtain wall system; The step of acquiring the second data information of the glass curtain wall system, and obtaining the local average wind pressure of the glass curtain wall system corresponding to the curtain wall connection node based on the second data information and the load information, specifically includes: Obtain the structural characteristics of the glass curtain wall system, and determine the panel area of ​​the glass curtain wall system that can withstand wind pressure based on the structural characteristics; Based on the panel area and the horizontal load, calculate the local average wind pressure experienced by the glass curtain wall system within the panel area corresponding to the actual measuring point location.

2. The method for indirect acquisition of wind load based on glass curtain wall node dynamic strain measurement according to claim 1, characterized in that, The cross-sectional area is the projected area of ​​the connecting bolts at the glass curtain wall connection node in the direction of force. The calculation of the horizontal load transmitted by the connector between the main structure and the glass curtain wall system based on the stress and the cross-sectional area specifically includes: When it is determined that the connection between the main structure and the glass curtain wall system via the connector is a mechanical transmission connection, the horizontal load transmitted between the connector and the glass curtain wall system under the mechanical transmission connection is calculated based on the stress and the projected area.

3. The method of claim 1, wherein, The calculation of the horizontal load transmitted by the connector between the main structure and the glass curtain wall system based on the stress and the cross-sectional area specifically includes: When it is determined that the connection between the main structure and the glass curtain wall system via the connector is an angle steel welding connection, the horizontal load transmitted between the connector and the main structure and the glass curtain wall system under the angle steel welding connection is calculated based on the stress and the cross-sectional area.

4. The method for indirect acquisition of wind load based on glass curtain wall node dynamic strain measurement according to claim 1, characterized in that, The method for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes also includes: Obtain the standard load value of the vertical structural surface of the high-rise building, and obtain the first wind pressure data of the high-rise building based on the standard load value; Obtain the wind speed data of the high-rise building, and obtain the second wind pressure data of the high-rise building based on the wind speed data; The local average wind pressure, the first wind pressure data, and the second wind pressure data are compared with each other to obtain the evaluation result of the local average wind pressure of the high-rise building.

5. A system for indirectly obtaining wind load based on dynamic strain measurement of glass curtain wall nodes, characterized in that, The wind load indirect acquisition system based on dynamic strain measurement of glass curtain wall nodes is used to implement the wind load indirect acquisition method based on dynamic strain measurement of glass curtain wall nodes as described in any one of claims 1-4. The wind load indirect acquisition system based on dynamic strain measurement of glass curtain wall nodes includes: The strain acquisition module is used to acquire strain information corresponding to the glass curtain wall connection node of the connector on the high-rise building and the first data information of the connector, wherein the glass curtain wall connection node is the node in the high-rise building where the main structure and the glass curtain wall system are connected. The load transfer module is used to obtain the load information transferred by the connector between the main structure and the glass curtain wall system based on the first data information and the strain information. The wind pressure acquisition module is used to acquire the second data information of the glass curtain wall system, and to obtain the local average wind pressure of the glass curtain wall system corresponding to the glass curtain wall connection node based on the second data information and the load information.

6. A terminal, characterized by comprising: The terminal includes: a memory, a processor, and a local wind pressure acquisition program based on dynamic strain measurement of curtain wall nodes, stored in the memory and executable on the processor. When the acquisition program of the wind load indirect acquisition method based on dynamic strain measurement of glass curtain wall nodes is executed by the processor, it implements the steps of the wind load indirect acquisition method based on dynamic strain measurement of glass curtain wall nodes as described in any one of claims 1-4.

7. A computer readable storage medium characterized by The computer-readable storage medium stores a program for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes. When the program is executed by a processor, it implements the steps of the method for indirectly obtaining wind loads based on dynamic strain measurements of glass curtain wall nodes as described in any one of claims 1-4.

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