CN218995083U - Concrete damage fracture test equipment under simulation real environment - Google Patents
Concrete damage fracture test equipment under simulation real environment Download PDFInfo
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- CN218995083U CN218995083U CN202223175293.6U CN202223175293U CN218995083U CN 218995083 U CN218995083 U CN 218995083U CN 202223175293 U CN202223175293 U CN 202223175293U CN 218995083 U CN218995083 U CN 218995083U
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Abstract
The utility model discloses a test device for simulating concrete damage and fracture in a real environment, which adopts a test box body, wherein a concrete sample is placed in the test box body, and the test device also comprises a real environment generator, a loading system, a test and data fusion system and a test box body sealing mechanism; the real environment generator comprises a temperature system, a humidity system, a rain system, a salt fog system, an ultraviolet radiation system and an airflow circulation system; the loading system comprises a loading frame and an actuator; the loading frame is arranged on the outer side of the test box body; the actuator adopts an oil cylinder; the fixed end of the oil cylinder is arranged on the loading frame, a piston rod of the oil cylinder extends into the test box body, and a ball head at the front end of the piston rod loads a concrete sample. The utility model can simulate the fine evolution of the concrete damage fracture performance under the action of multiple field coupling such as different single environments or complex environments and loads.
Description
Technical Field
The utility model relates to concrete testing equipment, in particular to concrete damage fracture testing equipment in a simulated real environment.
Background
Most concrete structures are under the coupling action of complex environments, loads and other fields, so that the concrete damage fracture evolution mechanism under the real environment is revealed, the whole concrete cracking and destroying process under the real environment is found to be an important work for ensuring the safety of concrete engineering, and the damage fracture parameters are also the most important basis for the concrete Cheng Kanglie cracking prevention design and crack hazard assessment. In the prior art, the accelerated environmental corrosion test of a small concrete test piece or the damage test of a large concrete member under a single load is mainly solved, and damage test equipment of the large concrete member is not available under the coupling effect of accelerated environmental corrosion and load, so that the real damage rule of the large concrete member under the real environment cannot be simulated.
Disclosure of Invention
In view of the technical problems in the background art, the utility model provides the concrete damage fracture test equipment capable of simulating the real environment. In order to achieve the above purpose, the present utility model provides the following technical solutions:
the test equipment adopts a test box body, a concrete sample is placed in the test box body, and the test equipment also comprises a real environment generator, a loading system, a test and data fusion system and a test box body sealing mechanism; the real environment generator comprises a temperature system, a humidity system, a rain system, a salt fog system, an ultraviolet radiation system and an airflow circulation system;
the loading system comprises a loading frame and an actuator; the loading frame is arranged on the outer side of the test box body;
the actuator adopts an oil cylinder; the fixed end of the oil cylinder is arranged on the loading frame, a piston rod of the oil cylinder extends into the test box body, and a ball head at the front end of the piston rod loads a concrete sample; the test box body sealing mechanism comprises a protective sleeve; the protection sleeve is sleeved outside the fixed end of the oil cylinder; the inside of the protective sleeve is hollow, and the opening of the protective sleeve faces downwards; the lower end of the protective sleeve is provided with a circle of circular ring which is in contact with the upper end face of the outer wall of the test box body; a circle of clamping grooves I are formed in the lower end face of the circular ring; the upper end face of the outer wall of the test box body is provided with a clamping groove II corresponding to the clamping groove I; the upper end face of the second sealing ring is clamped in a clamping groove I of the circular ring, and the lower end face of the second sealing ring is clamped in a clamping groove II of the outer wall of the test box body; the circular ring is provided with a locking piece; the protection sleeve upper end face is equipped with the through-hole that can hold the hydro-cylinder stiff end, is equipped with first sealing washer between this through-hole and the hydro-cylinder stiff end.
The number of the locking pieces is two; the two locking pieces are symmetrically arranged on the upper end face of the outer wall of the test box body and on two sides of the circular ring; the locking piece comprises an extrusion frame; the extrusion frame is L-shaped, one end of the extrusion frame is provided with an arc surface for compacting the circular ring, and the other end of the extrusion frame is rotationally connected to the eccentric position of the rotating disc through the damping rotating shaft; the rotating disc is abutted against the upper surface of the upper end face of the outer wall of the test box body; the middle part of the extrusion frame is rotationally connected with a horizontally arranged fixed shaft, and the side wall of the rotating disc is provided with a handle.
Preferably, the protective sleeve is made of transparent materials.
Preferably, the temperature system uses air refrigeration.
Preferably, the humidity system employs steam humidification.
Preferably, nine salt spray towers are arranged in the test box body; each salt spray tower is provided with a resistance heating plate.
The beneficial effects of the utility model are as follows:
1. according to the method, an infrared thermal image is adopted to diagnose invisible damage cracks, a multi-field coupling real environment generator is developed, a concrete damage fracture refined test system and an acoustic emission acquisition and transmission system are developed, a multi-parameter integrated data processing platform integrating environment, test, acoustic emission and the like is developed, the whole process evolution mechanism of the concrete structure performance is revealed essentially, a concrete performance evolution refined test method under the multi-field coupling action of a complex environment, load and the like is provided, and the concrete damage fracture evolution whole process test under the real environment is realized;
2. through set up the protection sleeve in the hydro-cylinder stiff end outside, realize the sealing between clearance and protection sleeve's ring and the test box up end between the hydro-cylinder stiff end through setting up first sealing washer and second sealing washer, set up the retaining member on the ring and be used for sealed fixed.
Drawings
FIG. 1 is a schematic diagram of a test apparatus according to the present utility model;
FIG. 2 is a schematic block diagram of a system of test equipment according to the present utility model;
FIG. 3 is a schematic view of the structure of the test chamber seal mechanism of the present utility model;
FIG. 4 is an enlarged view of a portion of FIG. 3A;
FIG. 5 is a schematic view of the installation of the test chamber seal mechanism of the present utility model;
in the figure, the test chamber comprises a test chamber body 1, a clamping groove II 11, a test chamber body sealing mechanism 2, a protective sleeve 21, a through hole 211, a circular ring 22, a first sealing ring 23, a second sealing ring 24, a loading system 3, a loading frame 31, an oil cylinder 32, a fixed end 321, a piston rod 322, a locking piece 4, a pressing frame 41, an arc-shaped surface 411, a damping rotating shaft 42, a rotating disc 43, a fixed shaft 44, a handle 45, a workroom 5 and an operating platform 51.
Detailed Description
1-5, the concrete damage fracture test equipment in the simulated real environment adopts a test box body 1, wherein a concrete sample is placed in the test box body 1, and the test box body test equipment further comprises a test box body sealing mechanism 2, a real environment generator, a loading system and a test and data fusion system; the real environment generator comprises a temperature system, a humidity system, a rain system, a salt fog system, an ultraviolet radiation system and an airflow circulation system.
The application develops a load device for simulating different stress fields; and (3) researching the determination method of the damage fracture parameters of the concrete with different strengths and different grades under the conditions of multi-field coupling such as load-solution coupling, dry-wet circulation, freeze thawing environment and the like. Aiming at several important influencing factors of intensity level, environmental condition, test piece size and grading, any two factors are selected for orthogonal test, and the damage process in the loading process is monitored in real time.
An operation room 5 is arranged on one side of the test box body 1, the operation room 5 is an area where the testing and data fusion system is located, and an operation platform 51 of a multifunctional environment test room is arranged in the operation room. The testing and data fusion system collects indexes such as loading rate, stress, strain, deflection and the like of the loading system, collects environmental factors such as temperature, humidity, rainfall and the like of an environmental generator, synchronously collects acoustic emission signals in the damage and destruction process of a concrete test piece, and fuses the optical-electrical-acoustic-thermal signal data to an operation interface. Compared with the prior art that a plurality of interfaces are used for collecting, even if the collection buttons are triggered synchronously, errors exist because the collection buttons cannot be completely synchronized, and the testing and data fusion system reduces errors.
The test and data fusion system also comprises a control system, the operation system comprises two modes of manual control and computer control, wherein the functions of temperature, humidity, illumination, rain, salt fog and the like in the test box body 1 can be independently combined through computer programming and according to actual test requirements, and a real environment simulation laboratory is formed.
The loading system 3 comprises a loading frame 31 and an actuator; the loading frame 31 is arranged outside the test box body 1;
the actuator adopts an oil cylinder 32; the fixed end 321 of the oil cylinder 32 is arranged on the loading frame 31, the piston rod 322 of the oil cylinder 32 extends into the test box body 1, the ball head at the front end of the piston rod 322 loads a concrete sample, a hole capable of accommodating the up-and-down movement of the piston rod 322 is formed in the piston rod 322 and the test box body 1, so that a gap exists between the hole and the piston rod 322 to cause the integral unsealing, however, the direct application of a sealing ring can cause the obstruction to the up-and-down movement of the piston rod 322, and the test box body sealing mechanism 2 is arranged outside the fixed end 321 of the oil cylinder 32 and can seal the gap and simultaneously does not influence the movement of the piston rod 322;
as shown in fig. 3-5, the test chamber body sealing mechanism 2 includes a protective sleeve 21; the protection sleeve 21 is sleeved outside the fixed end 321 of the oil cylinder 32; the protective sleeve 21 is hollow and has an opening facing downwards; the lower end of the protection sleeve 21 is provided with a circle of circular ring 22 which is in contact with the upper end face of the outer wall of the test box body 1, and the problem to be solved is that a gap between the protection sleeve 21 and the fixed end 321 of the oil cylinder 32 and a seal between the circular ring 22 of the protection sleeve 21 and the upper end face of the test box body 1 are solved; a circle of clamping grooves I (not shown in the figure) are formed in the lower end face of the circular ring 22; the upper end surface of the outer wall of the test box body 1 is provided with a clamping groove II 11 corresponding to the clamping groove I; the upper end face of the second sealing ring 24 is clamped in a clamping groove I of the circular ring 22, and the lower end face of the second sealing ring 24 is clamped in a clamping groove II 11 of the outer wall of the test box body 1; the circular ring 22 is provided with a locking piece 4 for pressing the circular ring 22 to realize sealing and fixing; the upper end face of the protection sleeve 21 is provided with a through hole 211 capable of accommodating the fixed end 321 of the oil cylinder 32, and a first sealing ring 23 is arranged between the through hole 211 and the fixed end 321 of the oil cylinder 32, so that the gap between the protection sleeve 21 and the fixed end 321 of the oil cylinder 32 is sealed.
The number of the locking parts 4 is two; the two locking pieces 4 are symmetrically arranged on the upper end face of the outer wall of the test box body 1 and on two sides of the circular ring 22; the locking member 4 includes a pressing frame 41; the extrusion frame 41 is L-shaped, one end of the extrusion frame 41 is provided with an arc-shaped surface 411 for compacting the circular ring 22, and the other end of the extrusion frame 41 is rotationally connected to the eccentric position of the rotating disc 43 through a damping rotating shaft 42; the rotating disc 43 is abutted against the upper surface of the upper end face of the outer wall of the test box body 1; the middle part of the extrusion frame 41 is rotationally connected with a horizontally arranged fixed shaft 44 (the fixed shaft 44 is arranged on a supporting block), the side wall of the rotating disc 43 is provided with a handle 45, in an initial state, the side wall of the rotating disc 43 lightly abuts against the upper end face of the outer wall of the test box body 1, when the circular ring 22 needs to be pressed, the handle 45 is rotated clockwise, the handle 45 drives the rotating disc 43 to rotate clockwise, the rotating disc 43 extrudes the upper surface of the test box body 1, the arc-shaped face 411 on the extrusion frame 41 rotates anticlockwise around the fixed shaft 44, and then the circular ring 22 is extruded and fixed, so that sealing and fixing are realized.
Preferably, the protective sleeve 21 is made of transparent material, and does not affect the operator's view of the piston rod outside the test chamber.
Preferably, the temperature system adopts air refrigeration, and comprises a stainless steel plate, a titanium alloy heating pipe, a compressor unit, a stainless steel shaft centrifugal fan and a multifunctional control system; after the power is turned on, the control interface sets a target temperature, 21 groups of titanium alloy heating pipes start to heat (or a compressor group starts to refrigerate) in operation, meanwhile, a centrifugal fan in the test box body 1 operates to circulate indoor air, so that the temperature in the test box body 1 is uniform, the real-time temperature in the test box body 1 is transmitted to an operating system by a sensor, and the operating interface displays a real-time temperature change curve.
Preferably, the humidity system employs steam humidification. The humidity system comprises a stainless steel heating pipe, a JGP vertical water pump, a 304 stainless steel humidifying boiler, an acrylic water cup and a control interface, wherein after a power supply is connected, target humidity is set, the JGP vertical water pump is used for supplying water to the humidifying boiler from the water cup, the heating pipes run simultaneously, moisture in the humidifying boiler is evaporated to provide humidity in a test room, real-time humidity in the test room is transmitted to an operating system by a sensor, and the operating interface displays a real-time humidity change curve.
The salt spray system comprises a 304 stainless steel saturator, a quartz duck egg nozzle, an air compressor, a PVC spray tower, an SNS air pipe, an SNS air inlet pressure regulating valve, an SNS spray pressure regulating valve, an SNS pressure gauge, an SNS electromagnetic valve, a resistance wire heating plate, an anti-corrosion water pump and a salt water tank, wherein the multifunctional control system sets the salt spray temperature, and the heating plate operates to provide the temperature for a salt spray test; the air compressors run simultaneously, delivering compressed gas to the saturator; the water pump sends the salt water to the spray tower, then the salt water is sprayed out by the duck egg nozzle and the compressed gas simultaneously, and the salt spray settling volume is controlled by adjusting the spray pressure by the spray pressure regulating valve.
Preferably, nine salt spray towers are arranged in the test box body 1, so that indoor salt spray uniformity is ensured; each salt spray tower is provided with a resistance heating plate to provide temperature for salt spray test, so that the salt spray settlement can be accurately controlled.
The rain system comprises 72 groups of three spray heads of 0.8mm, 1.0mm and 1.5mm, namely, a high-power centrifugal water pump, a pp temperature-resistant pipe spray pipeline, a purified water tank, an acid rain water tank and an SNS stainless steel electromagnetic valve; after the power supply is connected, the control system sends out an instruction, the electromagnetic valve is opened, the water pump pumps water from the water tank, the spray pipeline supplies water to the spray head, and the water yield of the spray head is adjusted according to test requirements to realize simulation of different rainfall.
The ultraviolet radiation system comprises a UVA ultraviolet lamp tube, a stainless steel lamp holder, a voltage regulator and a ballast. After the power supply is connected, the computer control system sends out instructions, the power supply reaches the lighting of the lamp tube through the voltage regulator to the ballast, and the ultraviolet radiation intensity is regulated according to the test requirement, so that the test requirement is met.
The air circulation system comprises a stainless steel anti-corrosion motor, a stainless steel centrifugal wind wheel, a wind direction swing blade and an air circulation air duct cabinet. After the power is turned on, the control system sends out an instruction, the motor starts to operate, the centrifugal wind wheel operates, air flows out of the air outlet on the air duct cabinet, and after the air circulates in the laboratory, the air flows back into the air duct cabinet through the lower air return inlet, so that a closed upper air outlet and lower air return single-circulation air supply mode is formed.
As shown in fig. 1 to 5, the working principle and flow of the utility model are as follows:
the handle 45 is rotated clockwise, the handle 45 is adjusted to drive the rotating disc 43 to rotate clockwise, the rotating disc 43 extrudes the upper surface of the test box body 1, as shown in fig. 4, the arc-shaped surface 411 on the extrusion frame 41 rotates anticlockwise around the fixed shaft 44, and then the circular ring 22 is extruded and fixed, so that sealing and fixing are realized.
The control system has two modes of manual control and computer programming control, wherein the functions of simulating the temperature, humidity, illumination, rain, salt fog and the like in the test box body 1 can be independently combined through computer programming and according to actual test requirements.
After the power is turned on, the equipment starts to work, high-pressure oil provided by a servo oil source enters the working cavity of the oil cylinder 32 through the servo valve, and the piston rod 322 and the ball head at the front end of the piston rod 322 are pushed to finish moving and loading. And when the test sample is loaded, the test and data fusion system acquires a position change signal of the displacement sensor and a force value change signal of the force sensor, or acquires the change of an oil pressure signal of the oil pressure sensor, and after data processing and amplification, the test result and the test curve are displayed on a computer screen for data storage.
Claims (7)
1. The utility model provides a concrete damage fracture test equipment under simulation real environment which characterized in that: the test equipment adopts a test box body, and a concrete sample is placed in the test box body, and is characterized by further comprising a real environment generator, a loading system, a test and data fusion system and a test box body sealing mechanism; the real environment generator comprises a temperature system, a humidity system, a rain system, a salt fog system, an ultraviolet radiation system and an airflow circulation system; an operation room is arranged on one side of the test box body, and the test and data fusion system is arranged in the operation room;
the loading system comprises a loading frame and an actuator; the loading frame is arranged on the outer side of the test box body;
the actuator adopts an oil cylinder; the fixed end of the oil cylinder is arranged on the loading frame, a piston rod of the oil cylinder extends into the test box body, and a ball head at the front end of the piston rod loads a concrete sample; the test box body sealing mechanism comprises a protective sleeve and a second sealing ring; the protection sleeve is sleeved outside the fixed end of the oil cylinder; the inside of the protective sleeve is hollow, and the opening of the protective sleeve faces downwards; the lower end of the protective sleeve is provided with a circle of circular ring which is in contact with the upper end face of the outer wall of the test box body; a circle of clamping grooves I are formed in the lower end face of the circular ring; the upper end face of the outer wall of the test box body is provided with a clamping groove II corresponding to the clamping groove I; the upper end face of the second sealing ring is clamped in a clamping groove I of the circular ring, and the lower end face of the second sealing ring is clamped in a clamping groove II of the outer wall of the test box body; the circular ring is provided with a locking piece; the protection sleeve upper end face is equipped with the through-hole that can hold the hydro-cylinder stiff end, is equipped with first sealing washer between this through-hole and the hydro-cylinder stiff end.
2. The simulated real environment concrete damage fracture test apparatus of claim 1, wherein: the number of the locking pieces is two; the two locking pieces are symmetrically arranged on the upper end face of the outer wall of the test box body and on two sides of the circular ring; the locking piece comprises an extrusion frame; the extrusion frame is L-shaped, one end of the extrusion frame is provided with an arc surface for compacting the circular ring, and the other end of the extrusion frame is rotationally connected to the eccentric position of the rotating disc through the damping rotating shaft; the rotating disc is abutted against the upper surface of the upper end face of the outer wall of the test box body; the middle part of the extrusion frame is rotationally connected with a horizontally arranged fixed shaft.
3. The simulated real environment concrete damage fracture test apparatus of claim 2, wherein: the side wall of the rotating disc is provided with a handle.
4. The simulated real environment concrete damage fracture test apparatus of claim 1, wherein: the protective sleeve is made of transparent materials.
5. The simulated real environment concrete damage fracture test apparatus of claim 1, wherein: the temperature system uses air refrigeration.
6. The simulated real environment concrete damage fracture test apparatus of claim 1, wherein: the humidity system adopts steam humidification.
7. The simulated real environment concrete damage fracture test apparatus of claim 1, wherein: nine salt spray towers are arranged in the test box body; each salt spray tower is provided with a resistance heating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223175293.6U CN218995083U (en) | 2022-11-29 | 2022-11-29 | Concrete damage fracture test equipment under simulation real environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223175293.6U CN218995083U (en) | 2022-11-29 | 2022-11-29 | Concrete damage fracture test equipment under simulation real environment |
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| CN218995083U true CN218995083U (en) | 2023-05-09 |
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| CN202223175293.6U Active CN218995083U (en) | 2022-11-29 | 2022-11-29 | Concrete damage fracture test equipment under simulation real environment |
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