A simulation experimental system and simulation method for vibration characteristics of building structure demolition by blasting

Abstract

This invention discloses a simulation experimental system for the vibration characteristics of building structure demolition by blasting. The simulation system includes: a blasting vibration generation model, a loading test device, a collapse body ground contact vibration generation model, and a monitoring and measurement system. The blasting vibration generation model includes an electronic detonator; the loading test device includes a connecting hook and a disconnecting device, with the disconnecting device located on the connecting hook; the connecting end of the collapse body ground contact vibration generation model is detachably connected to the other end of the connecting hook; the electronic detonator and the disconnecting device are respectively connected to the monitoring and measurement system. This invention also discloses a simulation method for the building structure demolition by blasting vibration simulation experimental system. Compared with existing technologies, this invention's building structure demolition by blasting vibration simulation experimental system studies the interaction mechanism and vibration characteristics of blasting vibration and ground contact vibration caused during the demolition of tall building structures by blasting.

Description

Technical Field

[0001] This invention relates to the technical field of physical experimental devices for simulating the vibration characteristics of blasting demolition, and particularly to an experimental system and method for simulating the vibration characteristics of blasting demolition of building structures. Background Technology

[0002] Demolition by blasting has become the preferred method for demolishing tall buildings in complex environments due to its advantages of safety, efficiency, economy, and environmental friendliness. However, the demolition of tall buildings by blasting inevitably generates harmful effects such as vibration, flying debris, noise, and dust. Among these, the blasting vibration and the ground impact vibration of the collapsed structure are the most prominent harmful effects. The vibration generated during blasting can adversely affect important protected targets such as houses, underground pipelines, and subway tunnels in the vicinity of the blast source. Therefore, the location of nearby protected targets must be considered during the blasting design phase. Predictions and verifications should be made based on the vibration characteristics and dynamic response of the structure at different stages of the blasting, and corresponding safety protection measures should be formulated.

[0003] While existing blasting demolition technologies have explored the characteristics of blasting vibration and ground vibration during the blasting demolition of tall buildings through theoretical analysis and numerical simulation, there is still a lack of experimental methods and systems that can accurately simulate these characteristics, thus limiting the depth of related research.

[0004] Therefore, how to provide a simulation experimental system for the vibration characteristics of building structure demolition by blasting, so as to achieve the technical effect of in-depth study on the interaction mechanism and vibration characteristics of blasting vibration and ground contact vibration caused during the demolition of tall building structures, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the problems existing in the prior art, the technical problem to be solved by the present invention is to provide a simulation experimental system for the vibration characteristics of building structure demolition by blasting, so as to achieve the technical effect of in-depth study on the interaction mechanism and vibration characteristics of blasting vibration and ground contact vibration caused during the demolition of tall building structures by blasting.

[0006] To achieve the above objectives, this invention provides a simulation experimental system for the vibration characteristics of blasting demolition of building structures. The system includes: a blasting vibration generation model, comprising a blasting body with a cubic structure and a blast hole inside, the closed end of which is buried with explosives; and a loading test device, positioned opposite the blasting vibration generation model, comprising a small truss, a fixed pulley, a main cable, a connecting hook, a disconnection device, and... A winch is provided, wherein the small truss is fixed to the horizontal ground, the fixed pulley is fixed to the center of the top crossbar of the small truss, the winch is located on the horizontal ground, one end of the main cable is connected to the winch, and the other end of the main cable passes through the fixed pulley and is detachably connected to one end of the connecting hook; the main cable and the fixed pulley are slidably connected; a disconnecting device is located on the connecting hook to control the disconnection of the connecting hook; a collapse body ground vibration generation model is provided, the connecting end of the collapse body ground vibration generation model is detachably connected to the other end of the connecting hook.

[0007] In the first aspect, the blasting vibration generation model further includes an electronic detonator located inside the borehole and connected to the explosive.

[0008] In the first aspect, the simulated experimental system for vibration characteristics of blasting demolition of building structures further includes a monitoring and measurement system, which includes: a control receiver; two laser emitters symmetrically arranged on two tripods of the small truss; and two photoelectric receivers symmetrically arranged on two tripods of the small truss, each photoelectric receiver located below each laser emitter; wherein the disconnecting device, the winch, the electronic detonator, each laser emitter, and each photoelectric receiver are respectively connected to the control receiver.

[0009] In the first aspect, the loading test apparatus further includes: a scale, the scale being located on a tripod of the small truss, one end of the scale being in contact with the horizontal ground, and the scale being perpendicular to the horizontal ground.

[0010] In the first aspect, the ground vibration generation model of the collapsed body includes: a collapsed body, the collapsed body having a spherical structure; a strain gauge, the strain gauge being disposed on the surface of the collapsed body, the strain gauge being located at the landing end of the collapsed body; wherein, the connecting end of the collapsed body is detachably connected to the other end of the connecting hook; the strain gauge is connected to the control receiver.

[0011] In the first aspect, the monitoring and measurement system further includes: two high-speed cameras, each of which is respectively configured to correspond one-to-one with the blasting vibration generation model and the collapse body ground contact vibration generation model; and each of the two high-speed cameras is connected to the control receiver.

[0012] In the first aspect, the monitoring and measurement system further includes: a plurality of first monitoring components, which are arranged on a horizontal circular surface centered on the collapse point of the collapsed body on the horizontal ground, and located on the diameter of the horizontal circular surface, distributed at stepped intervals along two directions of the diameter with the collapse point as the vertex; a plurality of groups of second monitoring components, which are located directly below the plurality of first monitoring components, and are distributed in a one-to-one correspondence with the plurality of first monitoring components; wherein each group of second monitoring components includes a plurality of second monitoring components, which are evenly spaced downwards in a direction perpendicular to the horizontal ground with an interval of 0.2m; each of the first monitoring components and each of the second monitoring components is connected to the control receiver.

[0013] In the first aspect, the first monitoring component includes a first accelerometer, a first earth pressure gauge, and a first earth displacement gauge, which are arranged in parallel; the second monitoring component includes a second accelerometer, a second earth pressure gauge, and a second earth displacement gauge, which are also arranged in parallel; the first accelerometer, the first earth pressure gauge, the first earth displacement gauge, the second accelerometer, the second earth pressure gauge, and the second earth displacement gauge are all connected to the control receiver.

[0014] This invention also provides a simulation method for a building structure demolition blasting vibration characteristic simulation experimental system. The simulation method is used to simulate the aforementioned building structure demolition blasting vibration characteristic simulation experimental system. The simulation method includes: preparing a blasting vibration generation model: using concrete to prepare a cube-shaped test block with a side length of 100cm, filling the blast hole of the cube-shaped test block with explosives, connecting an electronic detonator, connecting the electronic detonator to a control receiver, and blocking the blast hole to obtain a blasting vibration generation model; preparing a collapse body ground contact vibration generation model: using concrete to pour a collapse body with a diameter of 10cm to 100cm, connecting the... A ground-impact vibration generation model of the collapsed body is obtained by attaching a hook and placing strain gauges on the body. A simulation test is then conducted: the ground-impact vibration generation model of the collapsed body is installed on a loading test device, and a first monitoring component, a second monitoring component, and two high-speed cameras are installed to complete the installation of the building structure demolition vibration characteristic simulation test system. Then, the ground-impact vibration generation model of the collapsed body is raised to a predetermined height, and the disconnection device and electronic detonator are simultaneously controlled by the control receiver to allow the ground-impact vibration generation model of the collapsed body to fall freely while the demolition vibration generation model explodes. The monitoring data is received and recorded by the control receiver to complete the simulation test.

[0015] In the first aspect, during the simulation test, the borehole diameter, the amount of explosive charge, the mass of the collapsed body, and the height of the collapsed body are used as variables, and the simulation test is conducted by controlling a single variable.

[0016] Beneficial effects:

[0017] The present invention provides a simulation experimental system for the vibration characteristics of blasting demolition of building structures, mainly comprising a blasting vibration generation model, a loading test device, a collapse body ground contact vibration generation model, and a monitoring and measurement system. The blasting vibration generation model is located in front of the loading test device, and the collapse body ground contact vibration generation model is suspended on the loading test device. The horizontal distance between the blasting vibration generation model and the collapse body ground contact vibration generation model is greater than or equal to 10 times the diameter of the collapse body ground contact vibration generation model. The monitoring and measurement system controls the blasting vibration generation model and the loading test device respectively. Explosives are placed inside the blasting vibration generation model, using the explosives as the detonation source. The generated explosive stress wave destroys the blasting body and then passes through the soil. The propagation medium involves a concrete sample as the explosive body. An electronic detonator connected to the explosive is used to detonate the explosive, providing initial energy for its explosion. The ground vibration generation model is a sphere, suspended from a horizontal bar at the top of a small truss of the loading test device via a hook. A disconnection device is installed on the hook. A winch, controlled by a monitoring and measurement system, raises the ground vibration generation model to a preset height. Then, the monitoring and measurement system simultaneously controls the electronic detonator and the disconnection device, allowing the ground vibration generation model to fall freely while the explosive detonates. During this process, the explosion of the vibration generation model first generates an explosive stress wave, followed by the ground vibration generation model... Upon impact, ground-contact vibration waves are generated. The combined effect of these two vibrations is monitored by the aforementioned monitoring and measurement system, thereby obtaining the failure mode, deformation characteristics, and dynamic soil response parameters (acceleration, dynamic earth pressure, and dynamic stress) of the soil surface under the combined action of blasting vibration and ground-contact vibration with a time interval. In summary, the vibration characteristic simulation experimental system for blasting demolition of building structures of this invention overcomes the problem of unpredictable ground-contact vibration effects in actual engineering. It can simultaneously consider factors such as different vibration characteristics, different morphologies of collapsed body loads, different ground-contact energies, and multiple combined vibration effects, making the vibration effect prediction more consistent with the vibration generation and propagation characteristics under actual blasting demolition environments, and improving the accuracy of the simulation experiment. In addition to ensuring accuracy and scientific validity, it can also acquire dynamic response data such as particle vibration velocity, earth pressure, soil acceleration, and displacement under controllable conditions. This provides theoretical basis and experimental support for the demolition scheme and safety protection design of tall building structures. Furthermore, by quantitatively observing the dynamic response of soil when there is a time interval between blasting vibration and ground contact vibration during the scientific simulation of the demolition of tall building structures, it solves the problems of difficulty in testing the dynamic response of soil under the complex vibration of the collapsing body during the demolition of tall building structures and the lack of experimental data and support. This provides a theoretical foundation and experimental support for the safety design of the demolition of tall building structures and the protection of the protected objects. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the blasting vibration generation model of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of the building structure demolition vibration characteristic simulation experimental system of the present invention;

[0021] Figure 3 This is a schematic diagram of the layout structure of a set of second monitoring components of the present invention.

[0022] Figure label:

[0023] 1. Blasting vibration generation model; 11. Blasting body; 12. Blasting hole; 13. Explosive; 14. Electronic detonator;

[0024] 2. Loading test device; 21. Small truss; 22. Fixed pulley; 23. Main cable; 24. Connecting hook; 25. Disconnection device; 26. Winch; 27. Scale;

[0025] 3. Level ground;

[0026] 4. Model for generating ground vibration of collapsed body;

[0027] 5. Monitoring and measurement system; 51. Laser emitter; 52. Photoelectric receiver; 53. High-speed camera; 54. First monitoring component; 55. Second monitoring component; 551. Second accelerometer; 552. Second earth pressure gauge; 553. Second earth displacement gauge;

[0028] 6. Blockage;

[0029] 7. Collapse point. Detailed Implementation

[0030] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this specification are within the scope of protection of this invention.

[0031] Example 1

[0032] like Figures 1-3As shown in the figure, this embodiment provides a simulation test system for the vibration characteristics of blasting demolition of building structures. The simulation test system includes: a blasting vibration generation model 1, which is a cube structure and includes a blasting body 11. A blast hole 12 is opened inside the blasting body 11, and explosive 13 is buried at the closed end of the blast hole 12; and a loading test device 2, which is arranged opposite to the blasting vibration generation model 1. The loading test device 2 includes a small truss 21, a fixed pulley 22, a main cable 23, a connecting hook 24, a disconnection device 25, and a winch 2. 6. The small truss 21 is fixed to the horizontal ground 3. The fixed pulley 22 is fixed to the center of the top horizontal bar of the small truss 21. The winch 26 is located on the horizontal ground 3. One end of the main cable 23 is connected to the winch 26. The other end of the main cable 23 passes through the fixed pulley 22 and is detachably connected to one end of the connecting hook 24. The main cable 23 and the fixed pulley 22 are slidably connected. The disconnecting device 25 is located on the connecting hook 24 to control the disconnection of the connecting hook 24. The ground vibration generation model 4 of the collapsed body is detachably connected to the other end of the connecting hook 24.

[0033] The present invention provides a simulation experimental system for the vibration characteristics of blasting demolition of building structures, mainly comprising a blasting vibration generation model, a loading test device, a collapse body ground contact vibration generation model, and a monitoring and measurement system. The blasting vibration generation model is located in front of the loading test device, and the collapse body ground contact vibration generation model is suspended on the loading test device. The horizontal distance between the blasting vibration generation model and the collapse body ground contact vibration generation model is greater than or equal to 10 times the diameter of the collapse body ground contact vibration generation model. The monitoring and measurement system controls the blasting vibration generation model and the loading test device respectively. Explosives are placed inside the blasting vibration generation model, using the explosives as the detonation source. The generated explosive stress wave destroys the blasting body and then passes through the soil. The propagation medium involves a concrete sample as the explosive body. An electronic detonator connected to the explosive is used to detonate the explosive, providing initial energy for its explosion. The ground vibration generation model is a sphere, suspended from a horizontal bar at the top of a small truss of the loading test device via a hook. A disconnection device is installed on the hook. A winch, controlled by a monitoring and measurement system, raises the ground vibration generation model to a preset height. Then, the monitoring and measurement system simultaneously controls the electronic detonator and the disconnection device, allowing the ground vibration generation model to fall freely while the explosive detonates. During this process, the explosion of the vibration generation model first generates an explosive stress wave, followed by the ground vibration generation model... Upon impact, ground-contact vibration waves are generated. The combined effect of these two vibrations is monitored by the aforementioned monitoring and measurement system, thereby obtaining the failure mode, deformation characteristics, and dynamic soil response parameters (acceleration, dynamic earth pressure, and dynamic stress) of the soil surface under the combined action of blasting vibration and ground-contact vibration with a time interval. In summary, the vibration characteristic simulation experimental system for blasting demolition of building structures of this invention overcomes the problem of unpredictable ground-contact vibration effects in actual engineering. It can simultaneously consider factors such as different vibration characteristics, different morphologies of collapsed body loads, different ground-contact energies, and multiple combined vibration effects, making the vibration effect prediction more consistent with the vibration generation and propagation characteristics under actual blasting demolition environments, and improving the accuracy of the simulation experiment. In addition to ensuring accuracy and scientific validity, it can also acquire dynamic response data such as particle vibration velocity, earth pressure, soil acceleration, and displacement under controllable conditions. This provides theoretical basis and experimental support for the demolition scheme and safety protection design of tall building structures. Furthermore, by quantitatively observing the dynamic response of soil when there is a time interval between blasting vibration and ground contact vibration during the scientific simulation of the demolition of tall building structures, it solves the problems of difficulty in testing the dynamic response of soil under the complex vibration of the collapsing body during the demolition of tall building structures and the lack of experimental data and support. This provides a theoretical foundation and experimental support for the safety design of the demolition of tall building structures and the protection of the protected objects.

[0034] In some possible implementations, the blasting vibration generation model 1 further includes an electronic detonator 14 located inside the borehole 12 and connected to the explosive 13.

[0035] Specifically, electronic detonators are used to trigger the explosion of explosives, providing the initial energy for the explosion.

[0036] In some possible implementations, the building structure demolition vibration characteristic simulation experimental system further includes a monitoring and measurement system 5, which includes: a control receiver; two laser emitters 51 symmetrically arranged on two tripods of the small truss 21; and two photoelectric receivers 52 symmetrically arranged on two tripods of the small truss 21, each photoelectric receiver 52 located below each laser emitter 51; wherein the disconnecting device 25, the winch 26, the electronic detonator 14, each laser emitter 51, and each photoelectric receiver 52 are respectively connected to the control receiver.

[0037] Specifically, the control receiver is used to control the operation of the laser transmitter, photoelectric receiver, disconnection device, winch, electronic detonator, high-speed camera, strain gauge, first accelerometer, first earth pressure gauge, first earth displacement gauge, second accelerometer, second earth pressure gauge and second earth displacement gauge, as well as to receive and record monitoring data; the laser transmitter and photoelectric receiver work together to measure the falling speed of the ground contact vibration generation model of the collapsed body.

[0038] In some possible implementations, the loading test device 2 further includes a scale 27 located on a tripod of the small truss 21, one end of the scale 27 contacting the horizontal ground 3, and the scale 27 being perpendicular to the horizontal ground 3.

[0039] Specifically, by controlling the receiver to control the winch to drive the main cable, the ground contact vibration generation model of the collapsed body is raised. The height of the ground contact vibration generation model of the collapsed body is measured by a scale. The testable ground contact vibration generation model of the collapsed body is then dropped from different heights to study the deformation and dynamic response characteristics of different strata structures under the combined action of blasting vibration and ground contact vibration with a certain time interval.

[0040] In some possible implementations, the ground vibration generation model 4 of the collapsed body includes: a collapsed body body, the collapsed body body having a spherical structure; strain gauges, the strain gauges being arranged on the surface of the collapsed body body, the strain gauges being located at the landing end of the collapsed body body; wherein, the connecting end of the collapsed body body is detachably connected to the other end of the connecting hook 24; the strain gauges are connected to the control receiver.

[0041] Specifically, the collapse body is a spherical hammer made of concrete poured to a set strength, preferably a sphere with a diameter of 10cm to 100cm. Strain gauges are used to measure the deformation of the collapse body after it falls. The strain gauges are arranged on the surface of the collapse body during the pouring process and are bonded to it to form a blasting vibration generation model.

[0042] In some possible implementations, the monitoring and measurement system 5 further includes: two high-speed cameras 53, each of which is respectively configured to correspond one-to-one with the blasting vibration generation model 1 and the collapse body ground contact vibration generation model 4; and each of the two high-speed cameras 53 is connected to the control receiver.

[0043] Specifically, two high-speed cameras were used to observe the motion characteristics of the blasting vibration generation model and the collapse body ground contact vibration generation model, respectively.

[0044] In some possible implementations, the monitoring and measurement system 5 further includes: a plurality of first monitoring components 54, which are arranged on a horizontal circular surface centered on the collapse point 7 of the collapsed body located on the horizontal ground 3, and located on the diameter of the horizontal circular surface, distributed at stepped intervals along two directions of the diameter with the collapse point 7 as the vertex; a plurality of groups of second monitoring components 55, which are located directly below the plurality of first monitoring components 54, and are distributed in a one-to-one correspondence with the plurality of first monitoring components 54; wherein each group of second monitoring components 55 includes a plurality of second monitoring components 55, which are evenly spaced downwards in a direction perpendicular to the horizontal ground 3, with an interval of 0.2m; each of the first monitoring components 54 and each of the second monitoring components 55 is connected to the control receiver.

[0045] Specifically, the collapse point is a deployment point of the first monitoring component. During the preparation of the ground vibration generation model of the collapsed body, the collapse point is pre-set. The deployment points of other first monitoring components are arranged in a circular plane with the collapse point as the center. They can be set in two directions on a diameter with the collapse point as the vertex, and the spacing between deployment points in the same direction increases in a step-like manner. Alternatively, deployment points can be set on multiple diameters under the same conditions. In this invention, the deployment points of the first monitoring component can be set to three. The second monitoring point is set below the horizontal ground, that is, below the first monitoring component.

[0046] In some possible implementations, the first monitoring component 54 includes a first accelerometer, a first earth pressure gauge, and a first earth displacement gauge, which are arranged in parallel; the second monitoring component 55 includes a second accelerometer 551, a second earth pressure gauge 552, and a second earth displacement gauge 553, which are arranged in parallel; the first accelerometer, the first earth pressure gauge, the first earth displacement gauge, the second accelerometer 551, the second earth pressure gauge 552, and the second earth displacement gauge 553 are all connected to the control receiver.

[0047] Specifically, the first and second accelerometers are used to monitor the acceleration of the collapsed body ground vibration generation model when it lands; the first and second earth pressure gauges are used to monitor the dynamic earth pressure during the process of the collapsed body ground vibration generation model landing on the horizontal ground; the first and second earth displacement gauges are used to monitor the downward displacement of the soil during the process of the collapsed body ground vibration generation model landing on the horizontal ground, so as to determine the deformation of the soil.

[0048] Example 2

[0049] like Figures 1-3As shown, Embodiment 2 of the present invention provides a simulation method for a building structure demolition blasting vibration characteristic simulation experimental system. The simulation method is used to simulate the building structure demolition blasting vibration characteristic simulation experimental system described in Embodiment 1. The simulation method includes: preparing a blasting vibration generation model: using concrete to prepare a cube test block with a side length of 100cm, filling the blast hole of the cube test block with explosives, connecting an electronic detonator, connecting the electronic detonator to a control receiver, and blocking the blast hole to obtain a blasting vibration generation model; preparing a collapse body ground contact vibration generation model: using concrete to pour a collapse body with a diameter of 10cm to 100cm, connecting a connecting hook after pouring and placing strain gauges on the collapse body to obtain a collapse body ground contact vibration generation model. A simulation test was conducted: The ground vibration generation model of the collapsed body was installed on the loading test device, and a first monitoring component, a second monitoring component, and two high-speed cameras were set up to complete the installation of the building structure demolition vibration characteristic simulation test system. Then, the ground vibration generation model of the collapsed body was raised to a predetermined height. The disconnection device and the electronic detonator were simultaneously controlled by the control receiver, so that the ground vibration generation model of the collapsed body fell freely while the demolition vibration generation model exploded. The monitoring data was received and recorded by the control receiver to complete the simulation test. During the simulation test, the borehole diameter, the amount of explosive charge, the mass of the collapsed body, and the height of the collapsed body were used as variables to conduct the simulation test by controlling a single variable.

[0050] Specifically, in this invention, the blasting body of the blasting vibration generation model is a concrete sample, specifically a cube-shaped test block with a side length of 100cm prepared from concrete. The concrete sample is cast with different strengths, preferably C20 strength concrete. After the explosive and electronic detonator are installed inside the blasting body, the blast hole needs to be plugged with plugging material 6. The collapse body of the collapse body ground contact vibration generation model is a spherical drop hammer cast from concrete to the set strength, preferably a sphere with a diameter of 10cm to 100cm. The collapse point is pre-set during the casting process of the collapse body. The prepared collapse body ground contact vibration generation model is connected to the main cable via a hook, and the crossbar at the top of the small truss... A fixed pulley is installed on top, through which a main cable passes. The main cable is connected to a winch. A control receiver controls the winch to raise the collapsed body ground-contact vibration generation model to a preset height. Then, the control receiver simultaneously controls the disconnection device to disconnect and the electronic detonator to detonate explosives. The resulting blast stress wave destroys the concrete sample and propagates through the soil medium. The collapsed body ground-contact vibration generation model then lands, generating ground-contact vibration waves. The control receiver receives monitoring data from a laser emitter, photoelectric receiver, high-speed camera, strain gauges, a first accelerometer, a first earth pressure gauge, a first earth displacement gauge, a second accelerometer, a second earth pressure gauge, and a second earth displacement gauge. This study aims to acquire dynamic response data, including particle vibration velocity, soil surface failure mode, deformation characteristics, and dynamic earth pressure, soil acceleration, and displacement, from a model of falling body impact vibration. This data is used to conduct in-depth research on the interaction mechanism and vibration characteristics of blasting vibration and ground impact vibration during the demolition of tall buildings. Furthermore, different explosive charges and borehole diameters in the blasting vibration generation model, along with varying gravitational potential energies in the falling body impact vibration generation model, can be used to study the deformation and dynamic response characteristics of different geological structures under the combined action of blasting vibration and ground impact vibration with a certain time interval. This allows for the acquisition of data on the combined action of blasting vibration and ground impact vibration with a certain time interval. Under the same loading conditions, the failure mode, deformation characteristics, and dynamic earth response parameters of the soil surface, including acceleration, dynamic earth pressure, and dynamic stress, are considered. The different gravitational potential energies of the ground contact vibration generation model of the collapsed body can be achieved by changing the mass of the ground contact vibration generation model or changing the falling height of the ground contact vibration generation model. In summary, this invention overcomes the problem of the difficulty in predicting the ground contact vibration effect in actual engineering. It also considers factors such as different vibration characteristics, different morphological collapsed body loads, different ground contact energies, and the combined effects of multiple vibrations, which can make the vibration effect prediction more consistent with the vibration generation and propagation characteristics in the actual blasting demolition environment, and improve the accuracy and scientific nature of the simulation experiment.Simultaneously, quantitative observation of the dynamic response of soil was achieved when there was a time interval between blasting vibration and ground contact vibration. The interaction mechanism and vibration characteristics of blasting vibration and ground contact vibration caused during the demolition of tall buildings were studied in depth, providing a theoretical basis and experimental support for the safety design of the demolition of tall buildings and the protection of the protected objects.

[0051] It should be noted that the simulation method of the building structure demolition vibration characteristic simulation test system in this embodiment is used for the simulation test of the building structure demolition vibration characteristic simulation test system in this embodiment. Therefore, the performance principle of the building structure demolition vibration characteristic simulation test system will not be repeated here. For the parts not described in detail, please refer to embodiment one.

[0052] The present invention also provides a readable storage medium for use with the control receiver described in Embodiment 1. The readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the simulation method for the vibration characteristics simulation system of the demolition of tall buildings in Embodiment 2.

[0053] The readable storage medium is a readable storage medium capable of storing program code.

[0054] The readable storage medium includes any one of the following: USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, and optical disk.

[0055] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A simulation experimental system for the vibration characteristics of building structure demolition by blasting, characterized in that, The building structure demolition vibration characteristic simulation experimental system includes: A blasting vibration generation model (1) is provided, which includes a blasting body (11), which has a cubic structure and a blast hole (12) is provided inside the blasting body (11), and explosives (13) are buried at the closed end of the blast hole (12). A loading test device (2) is arranged opposite to the blasting vibration generation model (1). The loading test device (2) includes a small truss (21), a fixed pulley (22), a main cable (23), a connecting hook (24), a disconnection device (25), and a winch (26). The small truss (21) is fixed to the horizontal ground (3). The fixed pulley (22) is fixed to the center of the top horizontal bar of the small truss (21). The winch (26) is located on the horizontal ground (3). One end of the main cable (23) is connected to the winch (26). The other end of the main cable (23) passes through the fixed pulley (22) and is detachably connected to one end of the connecting hook (24). The main cable (23) and the fixed pulley (22) are slidably connected. The disconnection device (25) is located on the connecting hook (24) to control the disconnection of the connecting hook (24). The ground vibration generation model of the collapsed body (4) is detachably connected to the other end of the connecting hook (24).

2. The building structure demolition vibration characteristic simulation experimental system as described in claim 1, characterized in that: The blasting vibration generation model (1) also includes an electronic detonator (14), which is located inside the borehole (12) and is connected to the explosive (13).

3. The building structure demolition vibration characteristic simulation experimental system as described in claim 2, characterized in that, The building structure demolition vibration characteristic simulation experimental system also includes a monitoring and measurement system (5), which includes: Control receiver; Two laser emitters (51) are symmetrically arranged on two tripods of the small truss (21); Two photoelectric receiving devices (52) are symmetrically arranged on two tripods of the small truss (21), and each photoelectric receiving device (52) is located below each laser emitter (51); The disconnecting device (25), the winch (26), the electronic detonator (14), each of the laser emitters (51), and each of the photoelectric receivers (52) are respectively connected to the control receiver.

4. The building structure demolition vibration characteristic simulation experimental system as described in claim 3, characterized in that, The loading test device (2) also includes: A ruler (27) is located on a tripod of the small truss (21), one end of which is in contact with the horizontal ground (3), and the ruler (27) is perpendicular to the horizontal ground (3).

5. The building structure demolition vibration characteristic simulation experimental system as described in claim 4, characterized in that, The ground-contact vibration generation model (4) of the collapsed body includes: The collapsed body has a spherical structure. Strain gauges are arranged on the surface of the collapsed body and are located at the landing end of the collapsed body. The connecting end of the collapsed body is detachably connected to the other end of the connecting hook (24); the strain gauge is connected to the control receiver.

6. The building structure demolition vibration characteristic simulation experimental system as described in claim 5, characterized in that, The monitoring and measurement system (5) also includes: Two high-speed cameras (53) are respectively set to correspond one-to-one with the blasting vibration generation model (1) and the collapse body ground contact vibration generation model (4); the two high-speed cameras (53) are respectively connected to the control receiver.

7. The building structure demolition vibration characteristic simulation experimental system as described in claim 6, characterized in that, The monitoring and measurement system (5) also includes: A plurality of first monitoring components (54) are arranged on a horizontal circular surface with the collapse point (7) of the collapsed body located on the horizontal ground (3) as the center. The plurality of first monitoring components (54) are located on the diameter of the horizontal circular surface and are distributed in a stepped increasing interval along two directions of the diameter with the collapse point (7) as the vertex. Several sets of second monitoring components (55) are located directly below several first monitoring components (54), and the several sets of second monitoring components (55) are distributed in a one-to-one correspondence with several first monitoring components (54); Each group of second monitoring components (55) includes several second monitoring components (55), which are evenly spaced downwards in a direction perpendicular to the horizontal ground (3) with a spacing of 0.2m; each first monitoring component (54) and each second monitoring component (55) are respectively connected to the control receiver.

8. The building structure demolition vibration characteristic simulation experimental system as described in claim 7, characterized in that: The first monitoring component (54) includes a first accelerometer, a first earth pressure gauge, and a first earth displacement gauge, which are arranged in parallel. The second monitoring component (55) includes a second accelerometer (551), a second earth pressure gauge (552), and a second earth displacement gauge (553), which are arranged in parallel. The first accelerometer, the first earth pressure gauge, the first earth displacement gauge, the second accelerometer (551), the second earth pressure gauge (552), and the second earth displacement gauge (553) are all connected to the control receiver.

9. A simulation method for a building structure demolition vibration characteristic simulation experimental system, wherein the simulation method is used for simulating the building structure demolition vibration characteristic simulation experimental system according to any one of claims 1 to 8, characterized in that, The simulation method includes: Preparation of blasting vibration generation model: A cube test block with a side length of 100cm is prepared using concrete. Explosives are filled into the blast hole of the cube test block, an electronic detonator is connected, and the electronic detonator is connected to a control receiver. The blast hole is then blocked to obtain the blasting vibration generation model. Preparation of a ground-contact vibration generation model of a collapsed body: A collapsed body with a diameter of 10cm to 100cm is obtained by pouring concrete. After the pouring is completed, a connecting hook is connected and strain gauges are placed on the collapsed body to obtain a ground-contact vibration generation model of the collapsed body. A simulation test was conducted: The ground vibration generation model of the collapsed body was installed on the loading test device, and the first monitoring component, the second monitoring component, and two high-speed cameras were set up to complete the installation of the building structure demolition vibration characteristic simulation test system. Then, the ground vibration generation model of the collapsed body was raised to a predetermined height, and the disconnection device and the electronic detonator were controlled simultaneously through the control receiver, so that the ground vibration generation model of the collapsed body fell freely while the demolition vibration generation model exploded. The monitoring data was received and recorded through the control receiver to complete the simulation test.

10. The simulation method of the building structure blasting demolition vibration characteristic simulation experimental system as described in claim 9, characterized in that: During the simulation test, the borehole diameter, the amount of explosive charge, the mass of the collapsed body, and the height of the collapsed body were used as variables, and the simulation test was conducted by controlling a single variable.

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