A dynamic testing system and method for wind load during construction period of an integral steel platform

Abstract

This invention relates to a dynamic wind load testing system and method for integral steel platform construction, belonging to the field of integral steel platform construction technology. It addresses the technical problem that digital simulation of wind load values ​​for integral steel platforms, which uses numerical modeling to simulate real-world scenarios, fails to fully consider the actual impact of various factors on wind load during construction, making it difficult to accurately reflect wind load changes on the integral steel platform during construction. The system includes a building structure model, an integral steel platform formwork equipment model, a wind source device, a wind load simulation system, a wind load detection system, and a data analysis system. The method simulates the wind load on the steel platform formwork equipment during the construction of super high-rise buildings through wind tunnel testing. It acquires the stress on the steel platform by deploying multiple sensors and compares data obtained under different wind loads to obtain detailed wind load data on the steel platform formwork equipment with high accuracy, providing better reference for the selection of integral steel platform formwork equipment parameters.

Description

Technical Field

[0001] This invention belongs to the field of construction technology of integral steel platforms, and specifically relates to a dynamic testing system and method for wind load during the construction period of integral steel platforms. Background Technology

[0002] The assessment and calculation of wind loads are crucial factors to consider during the design and construction of integral steel platform formwork equipment. Integral steel platform formwork equipment is complex in shape and serves as a large temporary device for high-altitude operations; wind loads significantly impact its safety and stability during operation. The wind load on the steel platform is influenced by a variety of complex factors, including its own shape, structure, opening ratio, and weather conditions. These factors dynamically change with the increase in the number of stories during the construction of super high-rise buildings. Currently, wind load assessment for integral steel platforms is mostly based on experience, using digital simulation methods to determine key control points and platform parameters under the most unfavorable conditions. While the results obtained using this method have some reference value for steel platform design and construction, they have the following shortcomings:

[0003] First, digital simulation simulates real-world scenarios through numerical modeling, but it differs from actual construction conditions. Second, it does not fully consider the actual impact of changes in various factors on wind loads during construction, making it difficult to accurately reflect the changes in wind loads on the overall steel platform during construction. Third, it does not fully consider the dynamic impact of the main structure construction on the wind loads on the steel platform.

[0004] Therefore, how to provide a dynamic testing system and method for wind load during the construction period of an integral steel platform is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the technical issues of current digital simulations of wind load values ​​for integrated steel platforms, which rely on numerical modeling to simulate real-world scenarios but differ from actual construction conditions, fail to fully consider the actual impact of various factors on wind load during construction, and are unable to accurately reflect wind load changes on the integrated steel platform during construction, as well as the dynamic impact of the main structure construction on the wind load on the steel platform, this paper proposes a dynamic wind load testing system and method for integrated steel platforms during construction. This system simulates the wind load on the steel platform formwork equipment during the construction of super high-rise buildings through wind tunnel tests. It acquires the stress conditions of the steel platform by deploying multiple sensors, and compares data obtained by applying different wind loads to obtain detailed and accurate data on the wind load on the steel platform formwork equipment. This provides a better reference for the selection of parameters for the integrated steel platform formwork equipment.

[0006] To solve the above technical problems, the present invention includes the following technical solutions:

[0007] A dynamic wind load testing system for an integral steel platform during construction includes:

[0008] The main building model is a scaled-down model of the building to be built. The model is divided according to the floors and adopts a modular structure that is easy to assemble.

[0009] The overall steel platform formwork equipment model is a scaled-down model with the same proportions as the main building model. The overall steel platform formwork equipment model includes attached guide rails, which are connected to the main building model by bolts.

[0010] The wind source device adopts a wind tunnel system, which can adjust the wind load magnitude and direction as needed, and select a representative wind direction and magnitude according to the meteorological conditions of the project site;

[0011] A wind load simulation system, wherein the wind load simulation system adopts a numerical simulation model, which is established based on the main building model and the physical model of the steel platform formwork equipment, and takes into account the influence of wind load;

[0012] A wind load detection system, comprising a sensor device, a data transmission subsystem, and a data acquisition device.

[0013] Furthermore, the sensor device includes a wind speed sensor, a tilt sensor, a hydrostatic level sensor, a displacement sensor, and a high-frequency force balance.

[0014] Furthermore, the wind speed sensors are evenly installed at different positions on the top of the overall steel platform formwork equipment model, which can detect the wind direction and wind speed parameters of the wind source system on the overall steel platform formwork equipment model. The data obtained by the wind speed sensors are transmitted to the data acquisition device through the data transmission subsystem.

[0015] Furthermore, the tilt sensor is installed on each column of the tube frame in the overall steel platform formwork equipment model to obtain the tilt state of the tube frame column in real time during the construction process. The data collected by the tilt sensor is transmitted to the data acquisition device through the data transmission subsystem.

[0016] Furthermore, the static level sensor is installed on each of the main top beams in the steel platform formwork equipment model to acquire the vertical displacement of the overall steel platform formwork equipment frame in real time during the construction process. The data obtained by the static level instrument is transmitted to the data acquisition device through the data transmission subsystem.

[0017] Furthermore, the displacement sensors are evenly installed around the overall steel platform formwork equipment model. The horizontal displacement of the overall steel platform formwork equipment frame is measured by laser. The data obtained by the displacement sensors is transmitted to the data acquisition device through the data transmission subsystem.

[0018] Furthermore, the high-frequency force balance is installed on the base of the wind tunnel test site and connected to the main building model. It can obtain the overall stress situation of the main building model and the overall steel platform frame equipment model. The data obtained by the high-frequency force balance is transmitted to the data acquisition device through the data transmission subsystem.

[0019] Furthermore, the data acquisition device supports the Modbus TCP protocol, has no fewer than 16 data interfaces, supports digital / analog input, and uses a 300Hz high frequency to acquire data measured by the wind speed sensor, tilt sensor, hydrostatic level sensor, displacement sensor, and high-frequency force balance.

[0020] Furthermore, the data transmission subsystem is connected to the data acquisition device via a field data bus and a data cable; the data analysis system performs statistical analysis on the obtained data.

[0021] This invention also provides a method for dynamic testing of wind loads during the construction period of an integral steel platform, the method comprising the following steps:

[0022] Step S1: Provide a backup wind load dynamic testing system for the overall steel platform during construction.

[0023] Step S2: Create BIM models of the main building and the overall steel platform formwork equipment respectively. The main building BIM model is divided into floors according to the construction plan, and the overall steel platform formwork equipment BIM model is divided according to the structural composition of the formwork equipment.

[0024] Step S3: Convert the BIM model into a numerical simulation model using IFC, and analyze the wind load cloud distribution of the main building and the overall steel platform formwork equipment based on the obtained numerical simulation model.

[0025] Step S4: According to the construction plan, install the main building model layer by layer on the wind tunnel test platform, and then install the overall steel platform formwork equipment model on the main building model.

[0026] Step S5: Let the overall model stand still for a certain period of time, and the wind load detection system collects data from each sensor under the condition of no wind load. According to the wind load cloud map distribution obtained in Step 2, the wind source device loads low, medium and high wind loads in different directions with large wind loads, and collects data from each sensor under different directions and different sizes of wind loads.

[0027] Step S6: Calculate the difference between the data obtained after applying the wind load and the data obtained before applying the wind load to obtain the impact of the wind load on the overall steel platform formwork equipment.

[0028] Step S7: Repeat steps S4 and S5, attach the next layer of the main building model to the previous layer of the main building model, gradually increase the number of main building model layers, attach the overall steel platform formwork equipment model to the construction layer, and obtain the wind load situation of the overall steel platform formwork equipment during the construction process.

[0029] Step S8: Based on the wind load data of the overall steel platform formwork equipment obtained during the construction process, reasonably set the parameters of the overall steel platform formwork equipment, which is conducive to improving the safety of the overall steel platform formwork equipment during construction.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] This invention provides a dynamic wind load testing system for the construction period of an integral steel platform, including a building main model, an integral steel platform formwork equipment model, a wind source device, a wind load simulation system, a wind load detection system, and a data analysis system. This method simulates the wind load on the steel platform formwork equipment during the construction of super high-rise buildings through wind tunnel tests, obtains the stress on the steel platform by deploying multiple sensors, and compares the data obtained by loading different wind loads to obtain detailed wind load data on the steel platform formwork equipment. The system has high accuracy and provides better reference for the selection of parameters for the integral steel platform formwork equipment. Detailed Implementation

[0032] The following detailed description, in conjunction with specific embodiments, provides a more comprehensive explanation of the dynamic wind load testing system and method for an integral steel platform during construction, as provided by this invention. The advantages and features of this invention will become clearer from the following description.

[0033] A dynamic wind load testing system for the construction period of an integral steel platform includes a building main model, an integral steel platform formwork equipment model, a wind source device, a wind load simulation system, a wind load detection system, and a data analysis system. The building main model is a scaled-down model of the building to be built. The model is divided according to the floors and adopts a modular structure that is easy to assemble.

[0034] The overall steel platform formwork equipment model adopts a scaled-down model with the same proportions as the main building model. The overall steel platform formwork equipment model includes attached guide rails, which are connected to the main building model by bolts.

[0035] The wind source device adopts a wind tunnel system, which can adjust the wind load size and direction as needed, and select a representative wind direction and size according to the meteorological conditions of the project site;

[0036] The wind load simulation system uses a numerical simulation model, which is established based on the main building model and the physical model of the steel platform formwork equipment, and takes into account the influence of wind load.

[0037] The wind load detection system includes sensor devices, a data transmission subsystem, and a data acquisition device.

[0038] In this embodiment, more preferably, the sensor device includes a wind speed sensor, a tilt sensor, a hydrostatic level sensor, a displacement sensor, and a high-frequency force balance.

[0039] In this embodiment, more preferably, wind speed sensors are evenly installed at different positions on the top of the overall steel platform formwork equipment model, which can detect the wind direction and wind speed parameters of the wind source system on the overall steel platform formwork equipment model. The data obtained by the wind speed sensors are transmitted to the data acquisition device through the data transmission subsystem.

[0040] In this embodiment, more preferably, the tilt sensor is installed on each column of the tube frame in the overall steel platform formwork equipment model to obtain the tilt state of the tube frame column in real time during the construction process. The data collected by the tilt sensor is transmitted to the data acquisition device through the data transmission subsystem.

[0041] In this embodiment, more preferably, the static level sensor is installed on each of the main top beams in the steel platform formwork equipment model to acquire the vertical displacement of the overall steel platform formwork equipment frame in real time during the construction process. The data obtained by the static level instrument is transmitted to the data acquisition device through the data transmission subsystem.

[0042] In this embodiment, more preferably, displacement sensors are evenly installed around the overall steel platform mold equipment model, and the horizontal displacement of the overall steel platform mold equipment frame is measured by laser. The data obtained by the displacement sensors is transmitted to the data acquisition device through the data transmission subsystem.

[0043] In this embodiment, more preferably, the high-frequency force balance is installed on the base of the wind tunnel test site and connected to the main building model. It can obtain the overall stress situation of the main building model and the overall steel platform frame equipment model. The data obtained by the high-frequency force balance is transmitted to the data acquisition device through the data transmission subsystem.

[0044] In this embodiment, more preferably, the data acquisition device supports the Modbus TCP protocol, has no less than 16 data interfaces, supports digital / analog input, and uses 300Hz high frequency to acquire the data measured by the wind speed sensor, tilt sensor, hydrostatic level sensor, displacement sensor, and high frequency force balance.

[0045] In this embodiment, more preferably, the data transmission subsystem is connected to the data acquisition device via a field data bus and a data cable; the data analysis system performs statistical analysis on the obtained data.

[0046] This invention also provides a method for dynamic testing of wind loads during the construction period of an integral steel platform, the method comprising the following steps:

[0047] Step S1: Provide a backup wind load dynamic testing system for the overall steel platform during construction.

[0048] Step S2: Create BIM models of the main building and the overall steel platform formwork equipment respectively. The main building BIM model is divided into floors according to the construction plan, and the overall steel platform formwork equipment BIM model is divided according to the structural composition of the formwork equipment.

[0049] Step S3: Convert the BIM model into a numerical simulation model using IFC, and analyze the wind load cloud distribution of the main building and the overall steel platform formwork equipment based on the obtained numerical simulation model.

[0050] Step S4: According to the construction plan, install the main building model layer by layer on the wind tunnel test platform, and then install the overall steel platform formwork equipment model on the main building model.

[0051] Step S5: Let the overall model stand still for a certain period of time, and the wind load detection system collects data from each sensor under the condition of no wind load. According to the wind load cloud map distribution obtained in Step 2, the wind source device loads low, medium and high wind loads in different directions with large wind loads, and collects data from each sensor under different directions and different sizes of wind loads.

[0052] Step S6: Calculate the difference between the data obtained after applying the wind load and the data obtained before applying the wind load to obtain the impact of the wind load on the overall steel platform formwork equipment.

[0053] Step S7: Repeat steps S4 and S5, attach the next layer of the main building model to the previous layer of the main building model, gradually increase the number of main building model layers, attach the overall steel platform formwork equipment model to the construction layer, and obtain the wind load situation of the overall steel platform formwork equipment during the construction process.

[0054] Step S8: Based on the wind load data of the overall steel platform formwork equipment obtained during the construction process, reasonably set the parameters of the overall steel platform formwork equipment, which is conducive to improving the safety of the overall steel platform formwork equipment during construction.

[0055] The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. The above embodiments only illustrate several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for dynamic testing of wind load during the construction period of an integral steel platform, characterized in that, The method includes the following steps: Step S1: Provide a backup wind load dynamic testing system for the construction period of the integral steel platform. The wind load dynamic testing system for the construction period of the integral steel platform includes: The main building model is a scaled-down model of the building to be built. The model is divided according to the floors and adopts a modular structure that is easy to assemble. The overall steel platform formwork equipment model is a scaled-down model with the same proportions as the main building model. The overall steel platform formwork equipment model includes attached guide rails, which are connected to the main building model by bolts. The wind source device adopts a wind tunnel system, which can adjust the wind load magnitude and direction as needed, and select a representative wind direction and magnitude according to the meteorological conditions of the project site; A wind load simulation system, wherein the wind load simulation system adopts a numerical simulation model, which is established based on the main building model and the physical model of the steel platform formwork equipment, and takes into account the influence of wind load; A wind load detection system, comprising a sensor device, a data transmission subsystem, and a data acquisition device; Step S2: Create BIM models of the main building and the overall steel platform formwork equipment respectively. The main building BIM model is divided into floors according to the construction plan, and the overall steel platform formwork equipment BIM model is divided according to the structural composition of the formwork equipment. Step S3: Convert the BIM model into a numerical simulation model using IFC, and analyze the wind load cloud map distribution of the main building and the overall steel platform formwork equipment based on the obtained numerical simulation model. Step S4: According to the construction plan, install the main building model layer by layer on the wind tunnel test platform, and then install the overall steel platform formwork equipment model on the main building model. Step S5: Let the overall model stand still for a certain period of time, and the wind load detection system collects data from each sensor under the condition of no wind load. According to the wind load cloud map distribution obtained in Step 2, the wind source device loads low, medium and high wind loads in different directions with large wind loads, and collects data from each sensor under different directions and different sizes of wind loads. Step S6: Calculate the difference between the data obtained after applying the wind load and the data obtained before applying the wind load to obtain the impact of the wind load on the overall steel platform formwork equipment. Step S7: Repeat steps S4 and S5, attach the next layer of the main building model to the previous layer of the main building model, gradually increase the number of main building model layers, attach the overall steel platform formwork equipment model to the construction layer, and obtain the wind load situation of the overall steel platform formwork equipment during the construction process. Step S8: Based on the wind load data of the overall steel platform formwork equipment obtained during the construction process, reasonably set the parameters of the overall steel platform formwork equipment, which is conducive to improving the safety of the overall steel platform formwork equipment during construction.

2. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 1, characterized in that, The sensor device includes a wind speed sensor, a tilt sensor, a hydrostatic level sensor, a displacement sensor, and a high-frequency force balance.

3. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The wind speed sensors are evenly installed at different positions on the top of the overall steel platform formwork equipment model, and can detect the wind direction and wind speed parameters of the wind source system on the overall steel platform formwork equipment model. The data obtained by the wind speed sensors are transmitted to the data acquisition device through the data transmission subsystem.

4. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The tilt sensors are installed on each column of the tube frame in the overall steel platform formwork equipment model to obtain the tilt status of the tube frame column in real time during construction. The data collected by the tilt sensors is transmitted to the data acquisition device through the data transmission subsystem.

5. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The static level sensor is installed on each of the main top beams in the steel platform formwork equipment model to acquire the vertical displacement of the overall steel platform formwork equipment frame in real time during the construction process. The data obtained by the static level instrument is transmitted to the data acquisition device through the data transmission subsystem.

6. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The displacement sensors are evenly installed around the overall steel platform formwork equipment model. The horizontal displacement of the overall steel platform formwork equipment frame is measured by laser. The data obtained by the displacement sensors is transmitted to the data acquisition device through the data transmission subsystem.

7. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The high-frequency force balance is installed on the base of the wind tunnel test site and connected to the main building model. It can obtain the overall stress situation of the main building model and the overall steel platform frame equipment model. The data obtained by the high-frequency force balance is transmitted to the data acquisition device through the data transmission subsystem.

8. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The data acquisition device supports the Modbus TCP protocol, has no less than 16 data interfaces, supports digital / analog input, and uses 300Hz high frequency to acquire data measured by the wind speed sensor, tilt sensor, hydrostatic level sensor, displacement sensor, and high frequency force balance.

9. The method for dynamic testing of wind load during the construction period of the integral steel platform according to claim 2, characterized in that, The data transmission subsystem is connected to the data acquisition device via a field data bus and a data cable; the data analysis system performs statistical analysis on the obtained data.