A multi-degree-of-freedom building structure deformation simulation test system

Abstract

The application discloses a multi-degree-of-freedom building structure deformation simulation test system, which comprises a structure base, a structure main body and a gantry, the structure main body is arranged above the structure base, the gantry is connected with the structure main body through an electric hoist and is arranged above the structure main body; the structure base comprises a steel structure base, a hydraulic rod and a universal ball, the structure base can drive the structure main body above the structure base to move and / or tilt in X, Y and Z directions so as to change the pose of the structure main body; the system further comprises a fire source device and a smoke device, which are arranged in the structure main body to simulate the situation of a fire scene; the system further comprises a measuring device, the measuring device comprises a strain measuring module, a displacement measuring module and a temperature measuring module, and is connected with the structure main body to measure data in a building structure deformation simulation test process.

Description

Technical Field

[0001] This invention belongs to the field of building disaster prevention engineering technology and relates to a multi-degree-of-freedom building structure deformation simulation test system. Background Technology

[0002] Earthquakes are sudden and highly destructive natural disasters that often have a significant impact on building structures, causing building collapse, facility damage, and casualties. Simulating the vibration excitation of building structures during an earthquake allows for the representation of the stress conditions on the structure, which can help improve the earthquake resistance of buildings, explore the local structural stability of buildings during an earthquake, and provide a scientific basis for developing rapid search and rescue plans after an earthquake. The deformation of building structures during an earthquake is generally simulated using traditional earthquake shaking tables. These tables mainly consist of a shaking table surface, a hydraulic / electric cylinder drive and power system, a testing and analysis system, and a control system. They can be used to explore the earthquake damage process of various structures and to verify the effectiveness of new earthquake-resistant structures or devices.

[0003] Fire is also a major factor affecting building structures. In building fires, steel structures expand and deform due to increased temperature, causing them to collapse because they cannot bear their own weight. Domestic research on the mechanical properties of steel structures under fire conditions mainly focuses on steel structure specimens, with less research on the overall structural system.

[0004] Since earthquakes are very likely to be accompanied by fires, there is currently no data to report on the simulation of building structural deformation, displacement, and temperature field under the simultaneous action of earthquakes and fires.

[0005] Therefore, there is an urgent need to design a multi-degree-of-freedom building structure deformation simulation test system to solve the existing technical problems. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a multi-degree-of-freedom building structure deformation simulation test system. This system has a reasonable structure and can simulate structural collapse caused by both fire and earthquake, create fire scenarios, study and monitor information such as building deformation / displacement and temperature field, and analyze key monitoring indicators and early warning methods for secondary damage to damaged buildings.

[0007] To address the aforementioned technical problems, this invention provides a multi-degree-of-freedom building structure deformation simulation test system, comprising a structural foundation, a structural body, and a gantry frame. The structural body is positioned above the structural foundation, and the gantry frame is connected to the structural body via an electric hoist and covers the structural body. The structural foundation includes a steel foundation, hydraulic rods, and a universal ball joint, enabling the structural body to move and / or tilt in the X, Y, and Z directions to change its orientation. It also includes a fire source device and a smoke device, located inside the structural body to simulate a fire scene. Furthermore, it includes a measuring device comprising a strain measurement module, a displacement measurement module, and a temperature measurement module, connected to the structural body to measure data during the building structure simulation test.

[0008] In some embodiments, the structural foundation includes an upper foundation, a lower foundation, and a side foundation. The upper and lower foundations are rectangular frame structures, with a hydraulic rod between them. The hydraulic rod is connected to the upper and lower foundations via a universal ball joint to change the movement and / or tilt in the Z direction. The side foundation is located to the side of the upper and lower foundations and is connected to the side of the upper and lower foundations via a hydraulic rod and a universal ball joint to change the movement and / or tilt in the X and Y directions.

[0009] In some embodiments, the side base is a trapezoidal structure that is narrower at the top and wider at the bottom, and one end of the hydraulic rod abuts against the upper part of the side base.

[0010] In some embodiments, the side foundation is provided with two hydraulic rods along the X direction and one hydraulic rod along the Y direction.

[0011] In some embodiments, the ignition source device is disposed at the bottom of the main body of the structure, and the smoke device is disposed at the top of the main body of the structure.

[0012] In some embodiments, the strain measurement modules are spaced apart along the X, Y, and Z directions of the main structure.

[0013] In some embodiments, the electric hoist is connected to the top of the main structure via a hook.

[0014] In some embodiments, the main structure is a steel structure, which has at least two layers; the main beams and columns of each layer are made of I-beams, and the floor slabs are made of channel steel.

[0015] In some embodiments, the ignition source device is connected to the main structure via flange connection, hinge, or welding.

[0016] In some embodiments, the temperature measurement module includes a platinum-rhodium sensor and a PT100 sensor, wherein the platinum-rhodium sensor is disposed near the ignition source device and the PT100 sensor is disposed away from the ignition source device.

[0017] Beneficial effects of this invention:

[0018] This invention provides a multi-degree-of-freedom building structure deformation simulation test system with a reasonable structure. It can simulate the collapse of building structures caused by the combined effects of fire and earthquake, create fire scenarios, and study the monitored building deformation / displacement and temperature field information. This system is used to analyze key monitoring indicators and early warning and forecasting methods for secondary damage to damaged buildings. Attached Figure Description

[0019] The advantages of the present invention will become clearer and more readily understood through the following detailed description in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0020] Figure 1 This is a schematic diagram of a multi-degree-of-freedom building structure deformation simulation test system described in this invention;

[0021] Figure 2 This is a schematic diagram of the basic structure described in this invention;

[0022] Figure 3 This is a schematic diagram of the fire source device of the present invention connected to the main body of the structure via a flange;

[0023] Figure 4 This is a schematic diagram of the fire source device of the present invention hinged to the main body of the structure;

[0024] Figure 5 This is a schematic diagram of the fire source device of the present invention being welded to the main body of the structure. Detailed Implementation

[0025] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0026] The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0027] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0028] A schematic diagram of a multi-degree-of-freedom building structure deformation simulation test system described in this application is shown below. Figure 1 As shown, it includes a structural foundation 10, a structural body 20, and a gantry frame 30. The structural body 20 is located above the structural foundation 10, and the gantry frame 30 is connected to the structural body 20 via an electric hoist 40 and covers the structural body 20.

[0029] Furthermore, the structural foundation 10 includes a steel structural foundation, a hydraulic rod, and a universal ball, which can drive the structural body 20 on it to move and / or tilt in the X, Y, and Z directions to change the position of the structural body 20.

[0030] Figure 1 In the illustrated embodiment, the multi-degree-of-freedom building structure deformation simulation test system also includes a fire source device 50. The fire source device 50 is fixedly or movably connected to the main structure 20.

[0031] Furthermore, the multi-degree-of-freedom building structure deformation simulation test system also includes a smoke device 60, which is installed inside the main structure 20 to simulate the situation at a fire scene.

[0032] Furthermore, the multi-degree-of-freedom building structure deformation simulation test system also includes a measuring device 70, which includes a strain measuring module 71, a displacement measuring module 72, and a temperature measuring module 73, connected to the main structure 20 to measure data during the building structure deformation simulation test.

[0033] Figure 2 This is a schematic diagram of the structural foundation described in this invention. The structural foundation 10 includes an upper foundation 11, a lower foundation 12, and a side foundation 13. The upper foundation 11 and the lower foundation 12 are rectangular frame structures, and a hydraulic rod 14 is provided between them. The hydraulic rod 14 is connected to the upper foundation 11 and the lower foundation 12 through a universal ball to change the movement and / or tilt in the Z direction.

[0034] The side foundation 13 is located on the side of the upper foundation 11 and the lower foundation 12. It is connected to the side of the upper foundation 11 by a hydraulic rod 14 and a universal ball to control the movement and / or tilting in the X and Y directions, while increasing stability and preventing the structural foundation from easily tilting when only the hydraulic rod between the upper foundation 11 and the lower foundation 12 is used.

[0035] Furthermore, the side base 13 is a trapezoidal structure that is narrower at the top and wider at the bottom, such as... Figure 2 As shown, the lower long side of the side foundation 13 is fixedly connected to the lower foundation 12. One end of the hydraulic rod 14 abuts against the upper narrow side of the side foundation 13, and the other end abuts against the upper foundation 11. The trapezoidal structure of the side foundation 13, which is narrow at the top and wide at the bottom, ensures the stability of the side foundation 13, while allowing the hydraulic rod 14 to drive only the upper foundation 11.

[0036] Figure 2 In the illustrated embodiment, there are two side foundations 13. One side foundation 13 is connected to the upper foundation 11 along the X direction via two hydraulic rods 14, and the other side foundation 13 is connected to the upper foundation 11 along the Y direction via one hydraulic rod 14. The number of hydraulic rods between the side foundation and the upper foundation can be adjusted according to the specifications of the side foundation and the upper foundation to ensure uniform force distribution and ease of control.

[0037] Furthermore, the fire source device 50 is disposed at the bottom of the main body 20, and the smoke device 60 is disposed at the top of the main body 20.

[0038] In this invention, the smoke device 60 includes a smoke generating module, which is an existing smoke generating module and may include a servo motor, a planetary reducer, a fan, a smoke box, a turntable, and a smoke outlet; the smoke device 60 also includes a spray module, which is an existing spray module and may include a water pump, a solenoid valve, a filter, a water tank, a nozzle, a water pipe, and a water treatment device.

[0039] In this invention, the strain measurement module 71 is arranged at intervals along the X, Y and Z directions of the main structure 20.

[0040] The electric hoist 40 is connected to the top of the main structure 20 via a hook. Furthermore, the main structure 20 is a steel structure with at least two layers; the main beams and columns of each layer are made of I-beams, and the floor slabs are made of channel steel.

[0041] In this invention, a gyroscope sensor is installed inside the main body 20 to measure the tilt angle of the main body 20.

[0042] Furthermore, the electric hoist 40 is controlled by a frequency converter. By calculating force and displacement data, the pulling force and movement speed can be controlled in real time. During the tilting process, the force sensor of the electric hoist 40 experiences zero force, and the electric hoist 40 does not affect the simulated load on the steel structure. The tilt angle is calculated based on the displacement sensor data of the electric hoist 40 and the data collected from the gyroscope sensor. Once the steel structure reaches the set angle, the displacement of the electric hoist 40 no longer changes, fixing the steel structure at the set angle and preventing it from tilting.

[0043] After the test is completed, the damaged steel structure is removed, and the entire structure is pulled back to its original state using an electric hoist 40. After replacing the damaged parts, the next test can be conducted.

[0044] The ignition source device 50 can be fixedly connected to the main structure 20 to test the effect of a ignition source at a fixed location, including connection to the main structure 20 via a flange connection, such as... Figure 3 As shown, this is to facilitate the replacement of the ignition source device 50 after simulating a collapse; in some embodiments, the ignition source device 50 is connected to the main structure 20 by a hinge, such as... Figure 4 As shown; in addition, the ignition source device 50 can also be connected to the main structure 20 by welding, such as... Figure 5 As shown.

[0045] As a further improvement, the ignition source device 50 is movably disposed inside or outside the main structure 20. Specifically, a sliding groove is provided on the main beam and / or column and / or floor surface inside or outside the main structure 20. The ignition source device 50 includes a pulley and a servo mechanism. The servo mechanism drives the pulley to move in the sliding groove, thereby displacing the ignition source device 50 on the main beam and / or column and / or floor surface. This facilitates adjustment of the ignition source position and evaluation of simulation data caused by different ignition source positions. When the ignition source device 50 is outside the main structure 20, it is used to simulate a fire on the exterior wall of the structure.

[0046] The ignition source device 50 can be any existing ignition source device, such as a fuel tank, a fuel transmission pipe, a rotor flow meter, a fan, and a burner connected in sequence. A valve is installed on the fuel transmission pipe to adjust the fuel supply speed, thereby obtaining the required ignition source size.

[0047] In this invention, when the ignition source device 50 is fixedly connected to the main structure 20, the temperature measurement module 73 includes a platinum-rhodium sensor and a PT100 sensor. The platinum-rhodium sensor is located near the ignition source device 50. Specifically, the platinum-rhodium sensor located near the ignition source device 50 is selected with a measurement range of 0-1600℃. The PT100 sensor is located away from the ignition source device 50. The PT100 sensor is selected with a measurement range of -200-600℃ to improve measurement accuracy.

[0048] When the ignition source device 50 is movably connected to the main structure 20, the temperature measurement module 73 is movably connected to the main structure 20 so that the platinum-rhodium sensor is placed near the ignition source device 50 and the PT100 sensor is placed away from the ignition source device 50.

[0049] Compared with the shortcomings and deficiencies of existing technologies, the present invention provides a multi-degree-of-freedom building structure deformation simulation test system with a reasonable structure. It can simulate the structural collapse caused by the combined effects of fire and earthquake, create fire scenarios, and study the monitored building deformation / displacement and temperature field information, which can be used to analyze key monitoring indicators and early warning and forecasting methods for secondary damage to damaged buildings.

[0050] This invention is not limited to the above-described embodiments. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A multi-degree-of-freedom building structure deformation simulation test system, characterized in that, The system includes a structural foundation (10), a structural body (20), and a gantry frame (30). The structural body (20) is positioned above the structural foundation (10), and the gantry frame (30) is connected to the structural body (20) via an electric hoist (40) and covers the structural body (20). The structural foundation (10) includes a steel structural base, hydraulic rods, and a universal ball joint. The structural foundation (10) can move and / or tilt the structural body (20) in the X, Y, and Z directions to change the position of the structural body (20). The system also includes a fire source device (50) and a smoke device (60), which are located inside the structural body (20) to simulate a fire scene. Furthermore, the system includes a measuring device (70), which includes a strain measurement module (71), a displacement measurement module (72), and a temperature measurement module (73). 70) Connected to the main structure (20) to measure data during the building structure simulation test; the main structure (20) is a steel structure with at least two layers; the main beams and columns of each layer are made of I-beams, and the floor steel is made of channel steel. The temperature measurement module (73) includes a platinum-rhodium sensor and a PT100 sensor. The platinum-rhodium sensor is located near the fire source device (50), and the PT100 sensor is located away from the fire source device (50). The fire source device is movably located inside the main structure. The main beams and / or columns and / or floors inside the main structure are provided with sliding grooves. The fire source device includes pulleys and a servo mechanism. The servo mechanism drives the pulleys to move in the sliding grooves so that the fire source device can be displaced on the main beams and / or columns and / or floors. This makes it convenient to adjust the fire source position and evaluate the simulation data caused by different fire source positions. The temperature measurement module (73) is movably connected to the main structure (20). The electric hoist (40) is connected to the top of the main structure (20) via a hook. The electric hoist is equipped with a force sensor and a displacement sensor. A gyroscope sensor is installed inside the main structure. The electric hoist is controlled by a frequency converter. By calculating the force data and displacement data, the pulling force and movement speed can be controlled in real time. During the tilting process, the force sensor of the electric hoist is 0, and the electric hoist will not affect the simulated load of the steel structure. The tilt angle is calculated based on the displacement sensor data of the electric hoist and the data collected from the gyroscope sensor. When the steel structure reaches the set angle, the displacement of the electric hoist no longer changes, so that the steel structure is fixed at the set angle and will not tilt. After the test is completed, the electric hoist is used to pull the steel structure back to its original state, the damaged steel structure parts are removed, the damaged parts are replaced, and the next test is carried out.

2. The multi-degree-of-freedom building structure deformation simulation test system according to claim 1, characterized in that, The structural foundation (10) includes an upper foundation (11), a lower foundation (12), and a side foundation (13). The upper foundation (11) and the lower foundation (12) are rectangular frame structures, and a hydraulic rod (14) is provided between them. The hydraulic rod (14) is connected to the upper foundation (11) and the lower foundation (12) through a universal ball to change the movement and / or tilt in the Z direction. The side foundation (13) is located on the side of the upper foundation (11) and the lower foundation (12), and it is connected to the side of the upper foundation (11) through the hydraulic rod (14) and the universal ball to change the movement and / or tilt in the X and Y directions.

3. The multi-degree-of-freedom building structure deformation simulation test system according to claim 2, characterized in that, The side base (13) is a trapezoidal structure that is narrow at the top and wide at the bottom, and one end of the hydraulic rod (14) abuts against the upper part of the side base (13).

4. The multi-degree-of-freedom building structure deformation simulation test system according to claim 3, characterized in that, The side foundation (13) is provided with two hydraulic rods (14) along the X direction and one hydraulic rod (14) along the Y direction.

5. The multi-degree-of-freedom building structure deformation simulation test system according to claim 1, characterized in that, The fire source device (50) is located at the bottom of the main body of the structure (20), and the smoke device (60) is located at the top of the main body of the structure (20).

6. The multi-degree-of-freedom building structure deformation simulation test system according to claim 1, characterized in that, The strain measurement module (71) is arranged at intervals along the X, Y and Z directions of the main structure (20).

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