System and method for dynamically testing wind load during construction period of integral steel platform

Abstract

The invention relates to a dynamic test system and method for a wind load during an integral steel platform construction period, belongs to the technical field of integral steel platform construction, and aims to solve the problem that the actual influence of the change of each factor on the wind load in the construction process is not fully considered when the integral steel platform wind load value digital simulation simulates a real scene through numerical modeling. The system comprises a building main body 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, according to the method, the wind load condition borne by the steel platform formwork equipment in the super high-rise construction process is simulated through the wind tunnel test, the stress condition of the steel platform is obtained by deploying various sensors, detailed data of the wind load borne by the steel platform formwork equipment are obtained by comparing data obtained by loading different wind loads, the accuracy is high, and the method is suitable for popularization and application. And the method has better reference significance for parameter selection of the whole steel platform formwork equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of integral steel platform construction, and in particular relates to a system and method for dynamic testing of wind loads during the construction period of an integral steel platform. Background Art

[0002] The evaluation and calculation of wind loads are important factors to be considered during the design and construction of integral steel platform formwork equipment. The integral steel platform formwork equipment is complex in shape and is a large temporary device for aerial work. Wind loads have an important impact on its safety and stability during operation. The wind load on the steel platform is affected by a variety of complex factors such as its own shape, structure, opening rate, weather, etc. These factors change dynamically as the number of building floors increases during the construction of super-high-rise buildings. At present, the wind load on the integral steel platform is mostly determined based on experience, through digital simulation methods, to determine the key control points and steel platform parameters under the most unfavorable working conditions. Although the results obtained by this method have certain reference significance for the design or construction of steel platforms, they have the following shortcomings:

[0003] First, digital simulation simulates real scenes through numerical modeling, but it is different from the actual construction conditions; second, it does not fully consider the actual impact of changes in various factors on wind loads during the construction process, and it is difficult to accurately reflect the changes in wind loads on the overall steel platform during the construction process; third, it does not fully consider the dynamic impact of the main structure construction on the wind load on the steel platform.

[0004] Therefore, how to provide a system and method for dynamic testing of wind loads during the construction period of an integral steel platform is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In order to solve the technical problems that the current digital simulation of wind load values ​​of the overall steel platform simulates the real scene through numerical modeling, which is different from the actual construction conditions, does not fully consider the actual impact of changes in various factors on the wind load during the construction process, is difficult to accurately reflect the changes in the wind load of the overall steel platform during the construction process, and does not fully consider the dynamic impact of the main structure construction on the wind load on the steel platform, a dynamic testing system and method for wind loads during the construction period of an overall steel platform are provided. The wind load on the steel platform formwork equipment during the super-high-rise construction process is simulated through a wind tunnel test, and the force condition of the steel platform is obtained by deploying a variety of sensors. By comparing the data obtained by loading different wind loads, the detailed data of the wind load on the steel platform formwork equipment is obtained, which has high accuracy and has a better reference significance for the parameter selection of the overall steel platform formwork equipment.

[0006] In order to solve the above technical problems, the present invention includes the following technical solutions:

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

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

[0009] An integral steel platform formwork equipment model, wherein the integral steel platform formwork equipment model adopts a scaled model consistent with the proportions of the main building model, and the integral steel platform formwork equipment model includes an attachment rail, which is connected to the main building model by bolts;

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

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

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

[0013] Furthermore, the sensor device includes a wind speed sensor, an inclination sensor, a static 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 integral steel platform formwork equipment model, and can detect the wind direction and wind speed parameters of the wind source system of the integral 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 inclination sensor is installed on each cylinder frame column in the integral steel platform formwork equipment model to obtain the inclination state of the cylinder frame column in real time during the construction process. The data collected by the inclination sensor is transmitted to the data acquisition device through the data transmission subsystem.

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

[0017] Furthermore, the displacement sensors are evenly installed around the integral steel platform formwork equipment model, and the horizontal displacement of the integral 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 measuring balance is installed on the base of the wind tunnel test site and connected to the main building model, so as to obtain the overall force conditions of the main building model and the overall steel platform formwork equipment model. The data obtained by the high-frequency force measuring balance is transmitted to the data acquisition device through the data transmission subsystem.

[0019] Furthermore, the data acquisition device supports Modbus TCP protocol, has no less than 16 data interfaces, supports digital / analog input, and uses 300HZ high frequency to collect data measured by the wind speed sensor, inclination sensor, static level sensor, displacement sensor, and high-frequency force balance.

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

[0021] The present 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, providing the wind load dynamic test system of the integral steel platform during construction for standby;

[0023] Step S2, respectively establish the BIM models of the building main body and the integral steel platform formwork equipment, the BIM model of the building main body is split according to the floor according to the construction plan, and the BIM model of the integral steel platform formwork equipment is split according to the formwork equipment structure composition;

[0024] Step S3, converting the BIM model into a numerical simulation model through IFC, and analyzing the distribution of wind loads on the building main body and the integral steel platform formwork equipment based on the obtained numerical simulation model;

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

[0026] Step S5, the whole model is left to stand for a certain period of time, and the wind load detection system collects data from each sensor when no wind load is loaded; according to the distribution of the wind load cloud map obtained in step 2, the wind source device loads three levels of low, medium and high wind loads in different directions with larger wind loads, and collects data from each sensor in different directions and with different wind loads;

[0027] Step S6, subtract the data obtained after the wind load is applied from the data obtained before the wind load is applied to obtain the impact of the wind load on the overall steel platform formwork equipment;

[0028] Step S7, repeating steps S4 and S5, attaching the next layer of construction building main body model to the previous layer of building main body model, gradually increasing the number of building main body model layers, attaching the overall steel platform formwork equipment model to the construction layer, and obtaining the overall steel platform formwork equipment wind load during the construction process;

[0029] Step S8: Reasonably set parameters of the integral steel platform formwork equipment according to the wind load data of the integral steel platform formwork equipment during the construction process, which is beneficial to improving the safety of the integral steel platform formwork equipment during the construction process.

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

[0031] The present invention provides a wind load dynamic testing system for an integral steel platform during construction, comprising a building main body 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 conditions on the steel platform formwork equipment during super-high-rise construction through a wind tunnel test, obtains the stress conditions of the steel platform by deploying a variety of sensors, and obtains detailed data on the wind load on the steel platform formwork equipment by comparing the data obtained by loading different wind loads. The method has high accuracy and is of better reference significance for parameter selection of the integral steel platform formwork equipment. DETAILED DESCRIPTION

[0032] The following is a further detailed description of a wind load dynamic testing system and method for an integral steel platform during construction provided by the present invention in conjunction with specific embodiments. The advantages and features of the present invention will become more apparent from the following description.

[0033] A wind load dynamic test system for an integral steel platform during construction, comprising a building main body 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 body model is a scaled model of the building to be built, and the model is divided according to floors, and adopts a modular structure that is easy to assemble.

[0034] The overall steel platform formwork equipment model adopts a scaled model consistent with the proportions of the main building model. The overall steel platform formwork equipment model includes an attachment rail, which is connected to the main building model through bolts;

[0035] The wind source device adopts a wind tunnel system, which can adjust the size and direction of wind load according to needs. According to the meteorological conditions of the project location, representative wind direction and size are selected;

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

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

[0038] In this embodiment, more preferably, the sensor device includes a wind speed sensor, an inclination sensor, a static 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 integral steel platform formwork equipment model, and can detect the wind direction and wind speed parameters of the wind source system of the integral steel platform formwork equipment model. The data obtained by the wind speed sensor is transmitted to the data acquisition device through the data transmission subsystem.

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

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

[0042] In this embodiment, more preferably, the displacement sensors are evenly installed around the integral steel platform formwork equipment model, and the horizontal displacement of the integral 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.

[0043] In this embodiment, more preferably, a high-frequency force measuring balance is installed on the base of the wind tunnel test site and is connected to the main building model, so as to obtain the overall force conditions of the main building model and the overall steel platform formwork equipment model. The data obtained by the high-frequency force measuring 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 a high frequency of 300HZ to collect the data measured by the wind speed sensor, inclination sensor, static 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 using a field data bus and connected to the data acquisition device using a data line; the data analysis system performs statistical analysis on the obtained data.

[0046] The present 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, providing the wind load dynamic test system of the integral steel platform during construction for standby;

[0048] Step S2, respectively establish the BIM models of the building main body and the integral steel platform formwork equipment, the BIM model of the building main body is split according to the floor according to the construction plan, and the BIM model of the integral steel platform formwork equipment is split according to the formwork equipment structure composition;

[0049] Step S3, converting the BIM model into a numerical simulation model through IFC, and analyzing the distribution of wind loads on the building main body and the integral steel platform formwork equipment based on the obtained numerical simulation model;

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

[0051] Step S5, the whole model is left to stand for a certain period of time, and the wind load detection system collects data from each sensor when no wind load is loaded; according to the distribution of the wind load cloud map obtained in step 2, the wind source device loads three levels of low, medium and high wind loads in different directions with larger wind loads, and collects data from each sensor in different directions and with different wind loads;

[0052] Step S6, subtract the data obtained after the wind load is applied from the data obtained before the wind load is applied to obtain the impact of the wind load on the overall steel platform formwork equipment;

[0053] Step S7, repeating steps S4 and S5, attaching the next layer of construction building main body model to the previous layer of building main body model, gradually increasing the number of building main body model layers, attaching the overall steel platform formwork equipment model to the construction layer, and obtaining the overall steel platform formwork equipment wind load during the construction process;

[0054] Step S8: Reasonably set parameters of the integral steel platform formwork equipment according to the wind load data of the integral steel platform formwork equipment during the construction process, which is beneficial to improving the safety of the integral steel platform formwork equipment during the construction process.

[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 express several embodiments of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wind load dynamic test system for an integral steel platform during construction, characterized in that: include: The main building model is a scaled model of the building to be built. The model is divided according to floors and adopts a modular structure that is easy to assemble; An integral steel platform formwork equipment model, wherein the integral steel platform formwork equipment model adopts a scaled model consistent with the proportions of the main building model, and the integral steel platform formwork equipment model comprises an attachment rail, which is connected to the main building model by bolts; A wind source device, which adopts a wind tunnel system, can adjust the size and direction of wind load as needed, and select representative wind direction and size according to the meteorological conditions of the project location; A wind load simulation system, wherein the wind load simulation system adopts a numerical simulation model, wherein the numerical simulation model is established according to a building main body model and a steel platform formwork equipment entity model, and takes into account the influence of wind load; A wind load detection system comprises a sensor device, a data transmission subsystem and a data acquisition device.

2. The wind load dynamic testing system for the integral steel platform during construction period according to claim 1 is characterized in that: The sensor device includes a wind speed sensor, an inclination sensor, a static level sensor, a displacement sensor and a high-frequency force balance.

3. The wind load dynamic testing system for the integral steel platform during construction period according to claim 2 is characterized in that: The wind speed sensors are evenly installed at different positions on the top of the integral steel platform formwork equipment model, and can detect the wind direction and wind speed parameters of the wind source system of the integral 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 wind load dynamic testing system for the integral steel platform during construction period according to claim 2 is characterized in that: The inclination sensor is installed on each cylinder frame column in the integral steel platform formwork equipment model, and is used to obtain the inclination state of the cylinder frame column in real time during the construction process. The data collected by the inclination sensor is transmitted to the data acquisition device through the data transmission subsystem.

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

6. The wind load dynamic testing system for the integral steel platform during construction period according to claim 2 is characterized in that: The displacement sensors are evenly installed around the integral steel platform formwork equipment model, and the horizontal displacement of the integral 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 wind load dynamic testing system for the integral steel platform during construction period according to claim 2 is characterized in that: The high-frequency force measuring balance is installed on the base of the wind tunnel test site and is connected to the main building model. It can obtain the overall force conditions of the main building model and the overall steel platform formwork equipment model. The data obtained by the high-frequency force measuring balance is transmitted to the data acquisition device through the data transmission subsystem.

8. The wind load dynamic testing system for the integral steel platform during construction period according to claim 2 is 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 a high frequency of 300HZ to collect data measured by the wind speed sensor, inclination sensor, static level sensor, displacement sensor, and high-frequency force balance.

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

10. A dynamic test method for wind load during the construction period of an integral steel platform, characterized in that: The method comprises the following steps: Step S1, providing a dynamic wind load test system for the integral steel platform during construction according to any one of claims 1 to 9 for standby use; Step S2, respectively establish the BIM models of the building main body and the integral steel platform formwork equipment, the BIM model of the building main body is split according to the floor according to the construction plan, and the BIM model of the integral steel platform formwork equipment is split according to the formwork equipment structure composition; Step S3, converting the BIM model into a numerical simulation model through IFC, and analyzing the distribution of wind loads on the building main body and the integral steel platform formwork equipment based on the obtained numerical simulation model; Step S4: According to the construction plan, the main building model is installed layer by layer on the wind tunnel test platform, and then the overall steel platform formwork equipment model is installed on the main building model; Step S5, the whole model is left to stand for a certain period of time, and the wind load detection system collects data from each sensor when no wind load is loaded; according to the distribution of the wind load cloud map obtained in step 2, the wind source device loads three levels of low, medium and high wind loads in different directions with larger wind loads, and collects data from each sensor in different directions and with different wind loads; Step S6, subtract the data obtained after the wind load is applied from the data obtained before the wind load is applied to obtain the impact of the wind load on the overall steel platform formwork equipment; Step S7, repeating steps S4 and S5, attaching the next layer of construction building main body model to the previous layer of building main body model, gradually increasing the number of building main body model layers, attaching the overall steel platform formwork equipment model to the construction layer, and obtaining the overall steel platform formwork equipment wind load during the construction process; Step S8: Reasonably set parameters of the integral steel platform formwork equipment according to the wind load data of the integral steel platform formwork equipment during the construction process, which is beneficial to improving the safety of the integral steel platform formwork equipment during the construction process.