Enhanced full-size residential building structure gas leakage explosion multi-parameter test platform

Abstract

The invention belongs to the field of gas explosion test technology development, and relates to a reinforced full-size residential building structure gas leakage explosion multi-parameter test platform and method, which can be used for simulating the whole process of a gas leakage explosion accident in a real residential building scene. The gas leakage explosion evolution mechanism and disaster-causing consequence research under multiple ignition sources, multiple gas types, multiple pressure relief conditions and multiple obstacle environments can be realized. The test platform can simulate a resident house type, and through local reinforcement design and coupling test technology development of the test platform, a high detonation pressure, high simulation and multi-parameter gas explosion repeated test is realized.

Description

Technical Field

[0001] The present invention belongs to the field of gas explosion test technology development, and relates to a reinforced full-size residential structure gas leakage explosion multi-parameter test platform and method, which can be used to simulate the entire process of a gas leakage explosion accident in a real residential scene, and realize the study of the evolution mechanism and disaster consequences of gas leakage explosion under multiple ignition sources, multiple gas types, multiple pressure relief conditions and multiple obstacles. The test platform can simulate residential housing types, and through the local reinforcement design of the test platform and the development of coupled test technology, it can realize high explosion pressure, high simulation, and multi-parameter gas explosion repeated test. Background Art

[0002] Frequent urban gas leakage and explosion accidents have caused serious casualties and property losses. Therefore, it is urgent to carry out accident analysis and prevention and control work. Carrying out real-scene residential full-element gas explosion tests is a prerequisite for studying the mechanism of gas explosion accidents and the evolution of disaster propagation. The large-space residential gas leakage and explosion test platform can accurately obtain explosion accident data, comprehensively and truly reflect the typical residential gas leakage and explosion scenes, and provide a basis for further exploring and clarifying the evolution mechanism and characteristics of the entire chain of gas leakage-ignition and explosion-causing disasters. Therefore, it is of great significance to develop a large-space full-domain explosion test platform construction technology.

[0003] Patent CN112345589A discloses a scaled gas explosion experiment simulation platform with an area of ​​about 50m 2 The test platform includes a residential test platform, and a concentration sensor, a temperature sensor, a pressure sensor, and a camera device connected to a computer; the residential test platform is equipped with a bedroom, a bathroom, a living room, and a kitchen functional area designed in a certain scale, and is equipped with furniture and kitchenware. The present invention can simulate and reproduce a gas explosion accident in a real residential scene, and restore the changes in pressure and temperature during a gas explosion accident.

[0004] Patent CN216792091U relates to a scaled gas explosion test platform with an area of ​​about 40m 2 It includes a house body, which has a cavity for accommodating gas, an observation window is arranged on one side of the house body, and an explosion vent is arranged on the top; an image recording system is located outside the house body and is set up in front of the observation window to record the process of gas explosion; a gas supply system is located outside the house body and is connected to the inside of the house body through a pipeline to provide gas; a sensor monitoring system is arranged at different positions in the house body to detect the data of gas in the house body; the platform simulates and records the explosion data through the house body, the image recording system, the gas supply system and the sensor monitoring system.

[0005] Most of the existing gas leakage and explosion simulations are invented in the form of small-scale scaled test platforms, which are difficult to match with real residential buildings in terms of scale. Therefore, the scale and structure of the existing test platforms are not representative, and the explosion process obtained from them cannot accurately and objectively restore the real gas explosion situation, and the explosion law cannot accurately reflect the nature of the accident. The existing inventions have not taken into account the failure of lightweight walls and other components inside buildings in real explosion accidents and the research on the fragmentation disasters caused by them, and it is difficult to effectively guide the construction of a theoretical system for urban gas explosion accident investigations and the explosion-proof and explosion-resistant design of building structures. In addition, the existing large-scale test platforms are mainly ordinary reinforced concrete structures or steel structures with low explosion resistance, which are easily damaged under the impact of multiple explosion tests. Therefore, it is urgent to provide a reinforced full-size residential structure gas leakage explosion multi-parameter test platform. Summary of the invention

[0006] The purpose of the present invention is to provide a full-scale explosion test platform and method with representativeness, simulation, repeatability and multi-parameter testing, which is used to carry out full-domain tests of gas leakage and explosion under multiple ignition sources, multiple gas types, multiple pressure relief conditions and multiple obstacles. By fully simulating the structural layout of residential buildings, a completely real test simulation environment is provided, including building components such as lightweight walls that can fail and collapse indoors; and the test platform can be reused by strengthening the design of local building structures. The test results are made applicable and objective, providing a platform support for the analysis of the evolution mechanism of gas explosions in residential buildings, the restoration and source tracing analysis of accident processes, and the explosion-proof and explosion-resistant design of building structures.

[0007] The technical solution of the present invention is:

[0008] A reinforced full-scale residential structure gas leakage explosion multi-parameter test platform, the test platform includes a test platform, auxiliary facilities and a large space full-area explosion test method;

[0009] The test platform includes a building body, a gas injection system, a concentration test system, a temperature test system, a pressure test system, an image acquisition system, and a fragmentation parameter test system, and is used to carry out full-scale gas explosion test;

[0010] The auxiliary facilities include general furniture such as sofas, tables and chairs, beds, cabinets, refrigerators, etc., which are arranged inside the main body of the house to restore the layout of residential furniture and items to ensure the authenticity of the test platform;

[0011] The large-space full-area explosion test method is implemented on the basis of the support of the test platform. It is used to capture the evolution process of gas explosion propagation in residential buildings under the coupling of multiple factors, and monitor the distribution laws of explosion pressure, temperature, gas concentration parameters, structural damage and fragment dispersion characteristics.

[0012] The overall layout of the test platform: the main house is set up with two bedrooms, two living rooms and one bathroom (north-south transparent layout), with a construction area of ​​about 120m 2 The interior area is about 100m 2 , divided into kitchen, dining room, living room, master (secondary) bedroom and bathroom, representing the residential unit structure in Beijing;

[0013] The gas injection system is arranged outside the main body of the house and provides combustible gas to the room through a pipeline connected to the kitchen;

[0014] The concentration test system includes a gas concentration sensor arranged inside the main body of the house, which is used to test the gas concentration state;

[0015] The temperature test system includes an infrared thermometer arranged outside the main body of the house and a high-frequency dynamic temperature sensor inside the main body of the house, which is used to test the flame temperature generated by the explosion;

[0016] The pressure test system includes a free-field pressure sensor arranged outside the main body of the house and a wall pressure sensor inside the main body of the house, which is used to test the overpressure generated by the explosion;

[0017] The image acquisition system includes a Go Pro placed inside the main body of the house to capture the evolution of the explosion indoors; a high-speed camera placed outside the main body of the house to capture the development of the explosion outside the doors and windows; and a drone placed on the roof of the house to record the development of the explosion flames in the entire area;

[0018] The indoor fragment parameter test system consists of two pieces of energized target paper and an oscilloscope, which can be used to accurately monitor the speed of fragments from the collapse of internal building walls.

[0019] The main structure of the house is as follows: the main body of the house is a regular rectangular structure, with a length, width and height of 14-15m, 8-9m and 2-3m respectively. The main body of the house is made of reinforced concrete and is constructed of load-bearing exterior walls, outward-turned beams, load-bearing columns, roofs and floors; the rooms in the main body of the house are separated by brick partition walls to achieve different functional areas; explosion vents (simulated doors and windows) identical to those in real houses are pre-opened on the outer walls of each room in the main body of the house for installing door panels and glass of different materials and thicknesses;

[0020] The building reinforcement structure: the load-bearing outer wall of the building main body is 0.2 to 0.6 m thick and has an explosion-proof pressure of 400 to 600 kPa;

[0021] The roof of the main body of the house is 0.2 to 0.6 m thick and has an explosion-proof pressure of 400 to 600 kPa;

[0022] The reinforced design of the load-bearing exterior walls and roof ensures that the main structure of the house remains intact after multiple explosions;

[0023] The outward-turned beams of the main body of the house are 0.5 to 1.0 m higher than the load-bearing external wall, have a length dimension of 0.2 to 0.6 m in the main body of the house, a width dimension of 0.2 to 0.6 m, an explosion-proof pressure of 400 to 600 kPa, and are arranged horizontally and vertically on the top of the room partition wall;

[0024] The load-bearing columns of the main body of the house have a side length of 0.8 to 1.0 m and an explosion-proof pressure of 800 to 1200 kPa;

[0025] The reinforced design of the external beams and load-bearing columns is used to support the weight of the roof, reduce the load on the load-bearing walls, maintain the stability of the main body of the house, and at the same time ensure the actual clear height of the residential building;

[0026] The brick partition wall of the main body of the house is 0.2-0.4m thick and has an explosion-proof pressure of 30-60kPa. It adopts assembled lightweight wall to study the wall destruction response and fragment dispersion process under the impact of gas explosion.

[0027] The assembled structure of the house: the brick partition wall inside the main body of the house adopts an assembled structure, and keels are installed on the outward-turned beams and the floor to fix the partition wall. The partition wall slides into the keel at an angle, and the partition wall and the keel are fixed as a whole by screw connection, which is convenient for installation and disassembly; after a test is completed, the partition wall can be quickly replaced and installed, which ensures the reuse of the test platform and improves the test efficiency.

[0028] Types of ancillary facilities: According to the functions to be achieved by each functional zone in the residential building, corresponding ancillary facilities are arranged for each functional zone separated by the partition wall in the main body of the house. The bedroom is equipped with a bed, bedside table, wardrobe, etc. to ensure the function of sleeping and resting; the bathroom is equipped with a toilet, a sink, a water heater, etc. to ensure the function of defecation and washing; the living room is equipped with a sofa, a coffee table, a TV cabinet, etc. to ensure the function of leisure and relaxation; the dining room is equipped with a dining table and chairs, a refrigerator, etc. to ensure the function of dining; the kitchen is equipped with wall cabinets, wall cabinets, gas stoves, operating tables, etc. to ensure the function of cooking. Secondly, the explosion vents opened on the outer walls of each room are installed with door and window facilities of corresponding sizes. The indoor obstacle blocking rate is not less than 20%, which truly simulates the high congestion environment in urban residential buildings.

[0029] The location and layout of the ancillary facilities: According to the internal furniture layout of the residential building and the size and shape of each functional partition space, the ancillary facilities of each functional partition in the main body of the house are reasonably located. The bed in the bedroom is placed near the window, the bedside tables are placed on both sides of the bed, and the wardrobe is placed on the side near the door. The washbasin in the bathroom is placed in the corner near the door, the toilet is placed near the window, and the water heater is placed above the corner on the toilet side. The sofa in the living room is usually placed in the center of the side against the wall, the coffee table is placed in front of the sofa, and the TV cabinet is placed in the middle of the wall opposite the sofa. The dining table and chairs in the dining room are placed in the center, and the refrigerator is placed in the corner. The cabinets in the kitchen are designed in a straight line and arranged on the side near the window, including the stove and the operating table, and the wall cabinets are arranged above the cabinets. The typical ancillary facilities in residential buildings are retained and reasonably arranged to improve the accuracy and reliability of the results of gas leakage and explosion tests. The layout features of furniture and other layouts in real residential buildings are fully restored.

[0030] A method for testing a reinforced full-scale residential structure gas leakage and explosion multi-parameter test, using the reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform for testing, comprising the following steps:

[0031] S1. Determine the material and size of the ancillary facilities and arrange and install them in each functional area according to the residential layout;

[0032] S2. Determine the number and layout of the concentration test system, temperature test system, pressure test system, image acquisition system and fragmentation test system required inside and outside the main body of the building, and make preparations for the installation, fixation and connection of each system;

[0033] S3. Close all doors and windows of the main body of the house to ensure good internal sealing and a fully enclosed test space;

[0034] S4, continuously injecting gas into the house through the gas cylinder of the gas injection system outside the main body of the house, and monitoring by the gas concentration sensor, when the gas concentration in the main body of the house reaches a predetermined level, stop the gas injection;

[0035] S5. Detonation is performed at a predetermined ignition position, and at the same time, each test system works, the image acquisition system records the gas explosion process and related parameter data, and the fragmentation test system records the monitoring of the collapse fragmentation speed of the indoor wall;

[0036] S6. After the test, store the relevant data, take photos of the on-site traces after the test, collect the fragments of the building components and measure the size, mass and corresponding scattering distance of the fragments.

[0037] The present invention provides a reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform, which has the following advantages:

[0038] 1. It has full simulation of residential structure. The residential unit structure and scenes are basically consistent with real urban residential houses. According to the layout of residential furniture, the auxiliary facilities are retained and reasonably arranged, and the impact of obstacles on the explosion effect is considered, which is conducive to the full-scale residential gas explosion test and explosion accident reproduction;

[0039] 2. High explosion-proof performance. The main structure of the house is cast with high-strength concrete, and has walls, columns, beams, etc. with higher strength than general structures. The explosion-proof strength is much higher than the overpressure of the gas explosion shock wave, and the explosion-proof ability is outstanding, ensuring the reusability of the explosion test platform;

[0040] 3. Capable of testing multiple disaster parameters. In addition to testing explosion overpressure, temperature, flame and other disaster sources, the test platform can ensure the collapse of lightweight indoor walls to simulate real accident scenarios, and then highlight the platform's ability to accurately monitor the collapse and failure fragmentation speed of indoor building components. Through the global multi-parameter explosion test system, the propagation process of gas leakage explosion and the evolution law of explosion disasters are comprehensively and accurately recorded;

[0041] 4. Higher test efficiency. The main explosion-proof components of the building (doors, windows, and indoor lightweight walls) adopt an assembled structure, which is convenient for disassembly and replacement, and meets the needs of multiple working condition tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are only used for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. The same reference numerals are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0043] Figure 1 2 is a schematic diagram of the structure of a reinforced full-size residential structure gas leakage and explosion multi-parameter test platform provided by the embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of the main structure of a house according to the embodiment of the present invention;

[0045] Figure 3 It is a cloud diagram of the explosion overpressure development process;

[0046] Figure 4 It is the explosion overpressure time history curve of the key measuring points in each functional area.

[0047] Among them, 1-main body of the house; 2-gas injection system; 3-concentration test system; 4-temperature test system; 5-pressure test system; 6-image acquisition system; 7-fragmentation test system; 8-load-bearing exterior wall; 9-outward-turned beam; 10-load-bearing column; 11-partition wall; 12-entry door; 13-window; 14-master bedroom; 15-second bedroom; 16-bathroom; 17-living room; 18-dining room and kitchen. DETAILED DESCRIPTION

[0048] The following is a further description of the related functions that can be realized by the device of the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0049] Example

[0050] Reference Figure 1 The reinforced full-size residential structure gas leakage and explosion multi-parameter test platform provided in this embodiment includes a building body (1), a gas injection system (2), a concentration test system (3), a temperature test system (4), a pressure test system (5), an image acquisition system (6), and a fragmentation test system (7);

[0051] The main body of the house (1) is rectangular in shape, specifically, with dimensions of 14.15m in length, 8.3m in width, and 2.8m in height. The main body of the house (1) is formed by a load-bearing outer wall (8), an outward-turned beam (9), and a load-bearing column (10) connected by steel bars. The load-bearing outer wall (8) is 0.4m thick and has an explosion-proof pressure of 500kPa. The outward-turned beam (9) is 0.9m higher than the load-bearing outer wall, has a dimension of 0.4m in the length direction of the main body of the house, and a dimension of 0.6m in the width direction, and has an explosion-proof pressure of 500kPa. The side length of the load-bearing column (10) is 0.85m, and has an explosion-proof pressure of 1MPa. The reinforced design of the local structure ensures that the main body of the house remains structurally intact after multiple explosion shocks.

[0052] The main body of the house (1) is divided into six functional areas by a brick partition wall (11) with a thickness of 0.2m and an explosion-proof pressure of 50kPa. The dimensions of the master bedroom (14) and the second bedroom (15) are both 5.1m long, 3.5m wide and 2.8m high. The dimensions of the bathroom (16) are 3.15m long, 3.5m wide and 2.8m high. The dimensions of the living room (17) are 5.1m long, 4.0m wide and 2.8m high. The dimensions of the dining room and kitchen (18) are 5.1m long, 4.0m wide and 2.8m high. The structural layout represents a typical residential building, providing a real and reliable test environment.

[0053] The main body of the house (1) is provided with an entrance door (12) on the outer wall of the entrance hall, with the dimensions of 1.2m in length and 2.1m in height, made of stainless steel, and with an explosion-proof pressure of 40kPa. The master bedroom (14) and the second bedroom (15) are provided with an entrance door (12) on the inner wall, with the dimensions of 0.8m in length and 2.1m in height, made of wood, and with an explosion-proof pressure of 30kPa. The bathroom (16) is provided with an entrance door (12) on the inner wall, with the dimensions of 0.6m in length and 2.1m in height, made of wood, and with an explosion-proof pressure of 30kPa. At the same time, a window (13) is provided on the outer wall of each functional partition, wherein the window (13) in the bathroom (16) is 1.0m in length and 1.4m in height, and the dimensions of the other windows (13) are 1.4m in length and 1.4m in height. Glass is embedded in the window (13), and its explosion-proof pressure is 20kPa. The glass embedded in the door (12) and the window (13) can be changed in material and thickness according to the test requirements, so as to adjust the corresponding strength, which is convenient for multiple tests and comparisons between multiple working conditions. In addition, the partition wall (11), the door (12) and the window (13) are all connected to the main body of the house (1) using an assembled structure, which is convenient for installation and disassembly. After a test is completed, it can be quickly replaced and installed, ensuring the reusability of the entire test platform, saving costs, and improving the wide applicability of the test platform and the efficiency of the test.

[0054] Reference Figure 2 In this embodiment, each functional area in the main body of the house (1) is equipped with ancillary facilities according to typical furniture in residential buildings. The master bedroom (14) and the second bedroom (15) are both equipped with a bed, a bedside table, and a wardrobe. The total volume of the ancillary facilities is 3.4m 3 The bed is placed near the window, the bedside tables are placed on both sides of the bed, and the wardrobe is placed on the side near the door. The bathroom (16) is equipped with a washbasin, toilet, and water heater. The total volume of the ancillary facilities is 0.5m 3 The washbasin is placed in the corner near the door, the toilet is placed near the window, and the water heater is placed above the corner on the toilet side. The living room (17) is furnished with a sofa, a coffee table, and a TV cabinet. The total volume of the ancillary facilities is 2.7m 3 The sofa is placed in the center of the wall, the coffee table is placed in front of the sofa, and the TV cabinet is placed in the middle of the wall opposite the sofa. The dining room and kitchen (18) are equipped with dining tables and chairs, refrigerators, wall cabinets, gas stoves, and worktops. The total volume of the ancillary facilities is 2.3m 3 The dining table and chairs in the restaurant are placed in the center, and the refrigerator is placed in the corner. The kitchen cabinets are designed in a straight line and arranged on the window side, including the stove and the operating table, and there are wall cabinets above the cabinets. The typical auxiliary facilities in the residential buildings are retained and arranged reasonably to ensure the blocking rate in the test platform, while highly restoring the real scene inside the residential buildings to improve the accuracy and reliability of the gas leakage and explosion test results.

[0055] The enhanced large-space full-size typical residential structure gas leakage and explosion test method provided in the above embodiment is

[0056] S1. Determine the material and size of the auxiliary facilities, and arrange and install them in each functional area according to the typical layout of residential buildings.

[0057] S2. Determine the number and layout of the concentration test system (3), temperature test system (4), pressure test system (5), image acquisition system (6), and fragmentation test system (7) required inside and outside the building body (1), and install, fix, and connect each system.

[0058] S3. Close the door (12) and windows (13) of the main body of the house to ensure good internal sealing and a fully enclosed test space.

[0059] S4, continuously injecting combustible gas into the house through the gas cylinder of the gas injection system (2) outside the main body of the house, and monitoring by the gas concentration sensor (3), so that the gas concentration in the main body of the house reaches a predetermined level, and then stopping the gas injection,

[0060] S5. Detonation is performed at a predetermined ignition position, while all test systems are working, and the image acquisition system (6) records the gas explosion process and related parameter data.

[0061] S6. After the test, store the relevant data, take photos of the on-site traces after the experiment, collect the fragments of the building components and measure the size, mass and corresponding scattering distance of the fragments.

[0062] Comparative Example

[0063] In order to compare and evaluate the explosion resistance performance and design rationality of the reinforced large-space full-scale typical residential structure gas leakage explosion test platform, a full-scale numerical simulation was carried out.

[0064] A 1:1 full-scale physical model was constructed using the FLACS pre-processing module, and the specific structural dimensions were the same as those in the embodiment. Corresponding measuring points were set on the inner side of the main wall of the house, with a horizontal observation surface height of 1.4m to accurately monitor the explosion overpressure time history evolution curve and its peak value at key locations. Before starting the simulation, the boundary and initial conditions were set. The initial pressure and initial temperature of the environment were set to 1.01325×10 5Pa and 293K, the characteristic wind speed is 0.1m / s, and the EULER boundary condition is introduced to consider the reflection of the entity on the explosion pressure wave. In order to ensure that the inflation domain is in a stable state before ignition, the ignition delay time is 0.05s. The door and window components with fixed opening functions in the main body of the house are set to PRESSURE_RELIEF_PANELS boundaries, where the door opening pressure is set to 20kPa and the window opening pressure is set to 5kPa. When the explosion pressure difference in the environment on both sides of the pressure relief panel is greater than the set opening pressure, the pressure relief panel will automatically fail.

[0065] Set the computational domain area and divide the computational domain into grids. After verifying the grid independence, this simulation uses a 0.1m grid for calculation. Set the main body of the house to be evenly filled with a methane-air mixture at an equivalent concentration. The ignition source is located near the stove in the kitchen, 0.8m above the ground. Based on the above parameter settings, carry out numerical calculations.

[0066] Reference Figure 3 , when the main body of the house is completely filled with natural gas of equivalent concentration, the entire explosion relief process is completed within 1 second. The explosion shock wave quickly spreads from the ignition source to the surroundings, and after reaching the opening pressure of the pressure relief component, the shock wave continues to spread into the house. The load-bearing exterior walls and partition walls of the main body of the house are subjected to a large explosion overpressure. Figure 4 , the key positions of each functional area in the main body of the house reached their peak values ​​at around 750ms. The maximum explosion overpressure in the master bedroom was 141kPa, the maximum explosion overpressure in the second bedroom was 130kPa, the maximum explosion overpressure in the bathroom was 128kPa, the maximum explosion overpressure in the living room was 112kPa, and the maximum explosion overpressure in the restaurant and kitchen was 123kPa.

[0067] The enhanced design and explosion-proof pressure of the load-bearing structure of the test platform in the comparative embodiment prove that the load-bearing structure of the test platform can withstand the explosion overpressure impact caused by the internal gas explosion, so as to achieve the purpose of ensuring that the test platform has strong explosion-proof performance, the main structure of the house remains intact and firm after the test, and can be used for repeated tests. The explosion-proof pressure of the brick partition wall, the door and the window of the test platform in the comparative embodiment proves that under the action of the internal gas explosion shock wave, the components will collapse and fail in a certain direction, so as to achieve the purpose of using the test platform to study the wall damage response and fragment dispersion process under the impact of gas explosion.

[0068] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform, characterized by: The test platform includes a test platform and auxiliary facilities; The test platform includes a building body, a gas injection system, a concentration test system, a temperature test system, a pressure test system, an image acquisition system, and a fragmentation parameter test system; The auxiliary facilities are arranged inside the main body of the house and are used to restore the layout of furniture and items in residential buildings.

2. The reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform according to claim 1 is characterized by: In the test platform, the main building is set up with two bedrooms, two living rooms and one bathroom, with a construction area of ​​120m 2 , the interior area is 100m 2 , divided into kitchen, dining room, living room, master bedroom, second bedroom and bathroom; The gas injection system is arranged outside the main body of the house and provides combustible gas to the room through a pipeline connected to the kitchen; The concentration test system is a gas concentration sensor arranged inside the main body of the house, which is used to test the gas concentration; The temperature test system includes an infrared thermometer arranged outside the main body of the house and a high-frequency dynamic temperature sensor inside the main body of the house, which is used to test the flame temperature generated by the explosion; The pressure test system includes a free-field pressure sensor arranged outside the main body of the house and a wall pressure sensor inside the main body of the house, which is used to test the overpressure generated by the explosion; The image acquisition system includes a Go Pro placed inside the main body of the house to capture the evolution of the explosion indoors; High-speed cameras placed outside the main building are used to capture the development of explosions outside doors and windows; And drones deployed on the roof of the house to record the development of the explosion flames in the entire area; The indoor fragment parameter test system consists of two pieces of energized target paper and an oscilloscope, and is used to accurately monitor the speed of fragments from internal building wall collapse.

3. The reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform according to claim 2 is characterized by: The main body of the house is a regular rectangular structure, with length, width and height of 14 to 15m, 8 to 9m and 2 to 3m respectively. The main body of the house is made of reinforced concrete and is constructed of load-bearing exterior walls, outward-turned beams, load-bearing columns, roof and floor; the rooms in the main body of the house are separated by brick partition walls to achieve different functional areas; explosion-proof vents are pre-opened on the outer walls of each room in the main body of the house for installing door panels and glass of different materials and thicknesses.

4. The reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform according to claim 3 is characterized by: The load-bearing outer wall of the main body of the house is 0.2 to 0.6 m thick and has an explosion-proof pressure of 400 to 600 kPa; The roof of the main body of the house is 0.2 to 0.6 m thick and has an explosion-proof pressure of 400 to 600 kPa; The outward-turned beams of the main body of the house are 0.5 to 1.0 m higher than the load-bearing external wall, have a length dimension of 0.2 to 0.6 m in the main body of the house, a width dimension of 0.2 to 0.6 m, an explosion-proof pressure of 400 to 600 kPa, and are arranged horizontally and vertically on the top of the room partition wall; The load-bearing columns of the main body of the house have a side length of 0.8 to 1.0 m and an explosion-proof pressure of 800 to 1200 kPa; The brick partition wall of the main body of the house is 0.2 to 0.4 m thick, has an explosion-proof pressure of 30 to 60 kPa, and adopts assembled lightweight walls; The brick partition wall inside the main body of the house adopts an assembled structure, and keels are installed on the outward-turned beams and the floor to fix the partition wall. The partition wall slides into the keel at an angle, and the partition wall and the keel are fixed as a whole by screw connection, which is easy to install and disassemble; after a test is completed, the partition wall is quickly replaced and installed.

5. The reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform according to claim 1 is characterized by: Types of ancillary facilities: According to the functions to be achieved in each functional zone in the residential building, corresponding ancillary facilities are arranged for each functional zone separated by the partition wall in the main body of the house. In the bedroom, there are beds, bedside tables and wardrobes to ensure the sleeping and resting functions; in the bathroom, there are toilets, washbasins and water heaters to ensure the defecation and washing functions; in the living room, there are sofas, coffee tables and TV cabinets to ensure the leisure and relaxation functions; in the dining room, there are dining tables and chairs, and refrigerators to ensure the dining functions; in the kitchen, there are wall cabinets, wall cabinets, gas stoves and workbenches to ensure the cooking functions; secondly, doors and windows of corresponding sizes are installed on the explosion-proof openings on the outer walls of each room, and the indoor obstacle blocking rate is not less than 20%, so as to truly simulate the high congestion environment in urban residential buildings.

6. The reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform according to claim 5 is characterized by: The location layout of the ancillary facilities: According to the internal furniture layout of the residential building and the size and shape of the space of each functional zone, the location layout of the ancillary facilities of each functional zone in the main body of the house is carried out. The bed in the bedroom is placed near the window, the bedside tables are placed on both sides of the bed, the wardrobe is placed on the side close to the door, the washbasin in the bathroom is placed in the corner close to the door, the toilet is placed near the window, and the water heater is placed above the corner on the side of the toilet. The sofa in the living room is usually placed in the center of the wall, the coffee table is placed in front of the sofa, the TV cabinet is placed in the middle of the wall opposite the sofa, the dining table and chairs in the dining room are placed in the center, and the refrigerator is placed in the corner. The cabinets in the kitchen are designed in a straight line and arranged on the window side, including the stove and the workbench, and there are wall cabinets above the cabinets.

7. A method for testing a reinforced full-scale residential structure gas leakage and explosion multi-parameter test, using the reinforced full-scale residential structure gas leakage and explosion multi-parameter test platform described in any one of claims 1 to 6 for testing, comprising the following steps: S1. Arrange and install auxiliary facilities in each functional area according to the layout of residential buildings; S2, fixed installation concentration test system, temperature test system, pressure test system, image acquisition system and fragmentation test system; S3. Close all doors and windows of the main body of the house to ensure good internal sealing and a fully enclosed test space; S4, continuously injecting gas into the house through the gas cylinder of the gas injection system outside the main body of the house, and monitoring by the gas concentration sensor, when the gas concentration in the main body of the house reaches a predetermined level, stop the gas injection; S5. Detonation is performed at a predetermined ignition position, and at the same time, each test system works, the image acquisition system records the gas explosion process and related parameter data, and the fragmentation test system records the monitoring of the collapse fragmentation speed of the indoor wall; S6. After the test, store the relevant data, take photos of the on-site traces after the test, collect the fragments of the building components and measure the size, mass and corresponding scattering distance of the fragments.

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