CN114047011A - Reinforced concrete structure anti-progressive collapse performance test system under strong power load - Google Patents
Reinforced concrete structure anti-progressive collapse performance test system under strong power load Download PDFInfo
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- CN114047011A CN114047011A CN202111345234.6A CN202111345234A CN114047011A CN 114047011 A CN114047011 A CN 114047011A CN 202111345234 A CN202111345234 A CN 202111345234A CN 114047011 A CN114047011 A CN 114047011A
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Abstract
The invention discloses a system for testing the continuous collapse resistance of a reinforced concrete structure under a strong power load, which solves the technical problem that the continuous collapse resistance of the reinforced concrete structure under the action of the strong power load such as explosion cannot be quantitatively determined in the prior art. The device comprises a fixing device for fixing two ends of a reinforced concrete structure test piece, a loading mechanism for loading a strong power load on the reinforced concrete structure, and a PC (personal computer) connected with the fixing device and the strong power loading mechanism respectively; the reinforced concrete structure is provided with a conversion mechanism for converting concentrated strong power load into distributed explosive load; the damage degree of the reinforced concrete structure under the action of the explosive load can be rapidly calculated according to the result measured by the test device. The device has the advantages of simple structure, scientific and reasonable design and convenient use, and can quickly and efficiently simulate and test the continuous collapse resistance of the reinforced concrete structure under the action of strong dynamic loads such as explosion.
Description
Technical Field
The invention belongs to the technical field of reinforced concrete structure collapse resistance testing, and particularly relates to a reinforced concrete structure continuous collapse resistance testing system under a strong power load.
Background
The building structure under the action of explosive load firstly shows nonlinear dynamic response of local components, and certain damage and even destruction are generated. The load bearing capacity of partial components lost due to damage or damage can instantly seek to replace a force transmission path for redistribution, and the process can cause the nonlinear dynamic response of the whole structure, can cause large deformation of the structure and even a series of complex nonlinear behaviors such as component falling, contact collision and the like of structural parts, and finally can cause continuous collapse of the structure.
The application range of the reinforced concrete structure in civil engineering is very wide, and various engineering structures can be built by reinforced concrete. The reinforced concrete structure is effectively applied to special occasions of nuclear engineering, ocean engineering and mechanical manufacturing industry, such as a reactor pressure vessel, an ocean platform, a giant oil tanker, a large-tonnage hydraulic press frame and the like, and the technical problem which is difficult to solve by a steel structure is solved.
At present, a great deal of research is carried out on the aspects of tests and numerical simulation aiming at the continuous collapse of the reinforced concrete structure, and a great research result is obtained. However, the research on the continuous collapse resistance of the reinforced concrete structure under the action of strong dynamic loads such as explosion load is not deep enough, which is mainly due to the lack of a test system capable of quantitatively determining the continuous collapse resistance of the reinforced concrete structure under the action of strong dynamic loads such as explosion.
Therefore, it is a technical problem to be urgently solved by those skilled in the art to design a system for testing the continuous collapse resistance of a reinforced concrete structure under the action of a strong dynamic load to simulate the continuous collapse resistance of the reinforced concrete structure under the environment of the strong dynamic load such as explosion.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the system for testing the continuous collapse resistance of the reinforced concrete structure under the strong dynamic load is provided, so as to at least solve some technical problems.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the system for testing the continuous collapse resistance of the reinforced concrete structure under the strong power load comprises a fixing device for fixing two ends of the reinforced concrete structure, a strong power loading mechanism for loading the strong power load on the reinforced concrete structure, and a PC (personal computer) connected with the fixing device and the strong power loading mechanism respectively; the reinforced concrete structure is provided with a conversion mechanism for converting concentrated strong power load into distributed explosive load.
Further, the conversion mechanism comprises an inflatable air bag arranged on the reinforced concrete structure and a steel plate arranged on the inflatable air bag.
Furthermore, the strong power loading mechanism is a drop hammer testing machine, and a first force sensor connected with the PC is arranged at the bottom of the drop hammer testing machine.
Furthermore, the fixing device comprises a reaction frame, a sliding fixing seat fixed with the end part of the reinforced concrete structure, and a force measuring mechanism arranged between the sliding fixing seat and the reaction frame; the force measuring mechanisms are at least two and are distributed between the sliding type fixed seat and the counter-force frame at equal intervals.
Furthermore, the sliding type fixing seat comprises a side column fixed with the end part of the reinforced concrete structure, a hinged support arranged at the bottom of the side column and a force measuring seat; the hinged support is positioned on the force measuring seat.
Further, the hinged support comprises an upper hinged support fixed with the bottom of the side column, and a lower hinged support hinged with the upper hinged support through a rotating shaft, and a first roller is arranged at the bottom of the lower hinged support.
Furthermore, the force measuring base comprises a bearing steel plate for bearing the hinged support and a second force sensor arranged at the bottom of the bearing steel plate and connected with the PC.
Further, the dynamometer includes the articulated seat of first on locating the reaction frame, locates the articulated seat of second on the gliding fixing base to and both ends articulate mutually with the articulated seat of first articulated seat and second respectively and are connected with the PC third force transducer.
Further, still including locating the rotatory stop device that reinforced concrete structure middle part is used for restricting reinforced concrete structure is rotatory, rotatory stop device includes rotatory limiting bottom plate, and locate on the rotatory limiting bottom plate and arrange in a pair of rotatory limiting guide mechanism of reinforced concrete structure middle part both sides separately, rotatory limiting guide mechanism includes a pair of angle steel that is fixed in on the rotatory limiting bottom plate and parallel distribution each other, be formed with the guide way between two angle steel, be equipped with on the reinforced concrete structure with guide way looks adaptation and be located the screw rod of guide way.
Further, still include two at least horizontal displacement stop device that locate reinforced concrete structure middle part and be used for restricting reinforced concrete structure horizontal migration, horizontal displacement stop device includes horizontal displacement limiting bottom plate, locates a pair of H shaped steel on the horizontal displacement limiting bottom plate, and a pair of H shaped steel branch is listed in reinforced concrete structure both sides, and reinforced concrete structure both sides are equipped with the second gyro wheel, second gyro wheel and H shaped steel sliding contact.
Compared with the prior art, the invention has the following beneficial effects:
the device has the advantages of simple structure, scientific and reasonable design and convenient use, and can quickly and efficiently simulate and test the continuous collapse resistance of the reinforced concrete structure under the action of strong dynamic loads such as explosion.
The invention mainly comprises a fixing device, a strong power loading mechanism, a conversion mechanism and a PC (personal computer), wherein the fixing device is fixed with two ends of the reinforced concrete structure, the strong power loading mechanism is directly loaded on the conversion mechanism, the force is transferred to the reinforced concrete structure by the conversion mechanism, and the whole stress of the reinforced concrete structure is equivalent to the stress in the real explosion environment and other environments through the uniform force of the conversion mechanism. The PC is used for receiving stress information of the parts connected with the PC and displaying and storing the stress information, so that a tester can analyze and summarize the stress information conveniently. Therefore, the continuous collapse resistance of the reinforced concrete structure under the environment of strong dynamic load action such as explosion can be simulated and tested quickly and efficiently.
The conversion mechanism of the invention comprises an inflatable airbag and a steel plate, the whole thickness of the inflatable airbag is at least 50mm, the whole thickness of the steel plate is at least 30mm, the inflatable airbag can be bound on the top surface of the reinforced concrete structure through a binding rope and the like, the steel plate can be bound on the top surface of the inflatable airbag through the binding rope and the like, a drop hammer testing machine hits the steel plate at a certain speed through a control system of the drop hammer testing machine, the steel plate transmits force to the inflatable airbag, the inflatable airbag transmits force to the reinforced concrete structure, thus, the reinforced concrete structure is stressed uniformly, the impact of the blast wave in the environments of explosion and the like can be effectively reduced, therefore, the continuous collapse resistance of the reinforced concrete structure under the action environment of strong power loads such as explosion is effectively simulated and tested, the first force sensor is arranged at the bottom of the drop hammer tester and is impacted by the first force sensor and the steel plate, and the PC receives stress parameter information transmitted by the first force sensor in real time to store and display.
The fixing device comprises a reaction frame, a sliding fixing seat and a force measuring mechanism, wherein the reinforced concrete structure is fixed with the sliding fixing seat, and the reinforced concrete structure sequentially transmits force to the sliding fixing seat, the force measuring mechanism and the reaction frame when the reinforced concrete structure is subjected to performance test. The reaction frame is a steel structure frame body formed by welding thick steel plates, the thickness of the thick steel plates is at least 5cm, and the steel structure frame body is fixed on the ground and bears the impact force conducted in the horizontal direction to the reinforced concrete structure in the test process. The force measuring mechanism conveys stress parameter information to the PC for storage and display, the sliding type fixing seat supports the reinforced concrete structure in the vertical direction on one hand, and can slide in the horizontal direction on the other hand, so that force can be conveniently transferred to the force measuring mechanism, the two force measuring mechanisms are adopted, the upper limit of force measurement can be improved on the one hand, and the overall stability of the fixing device can also be improved through the parallel distribution structure on the other hand.
The sliding type fixing seat comprises a side column, a hinged support and a force measuring seat, wherein the hinged support comprises an upper hinged support, a rotating shaft, a lower hinged support and a first roller, the force measuring seat comprises a bearing steel plate and a second force sensor, the hinged support is used for releasing rotation restraint through the rotating shaft and is matched with the first roller to realize real-time force transmission to a force measuring mechanism, and the second force sensor can monitor the impact force in the vertical direction transmitted by a reinforced concrete structure on the whole sliding type fixing seat in real time and transmit the monitored impact force information to a PC (personal computer) in real time for display and storage.
The force measuring mechanism comprises a first hinged seat, a second hinged seat and a third force sensor. And the third force sensors are horizontally distributed, so that the impact force conducted by the reinforced concrete structure on the sliding fixing seat in the horizontal direction can be effectively monitored, and the monitored impact force information is transmitted to the PC for displaying and storing in real time.
The invention is provided with a rotation limiting device in the middle of the reinforced concrete structure, which is used for limiting the reinforced concrete structure to rotate under the action of strong dynamic load. The rotary limiting device comprises a rotary limiting bottom plate and a pair of rotary limiting guide mechanisms, the rotary limiting guide mechanisms are composed of a pair of parallel-distributed angle steels, a guide groove is formed between the two angle steels, and the screws extending out of the two sides of the reinforced concrete structure are located in the guide groove. By the design, the reinforced concrete structure can not rotate to release energy when being subjected to the action of strong dynamic load. And the smooth test is ensured.
The horizontal displacement limiting device is arranged in the middle of the reinforced concrete structure and used for limiting the horizontal movement of the reinforced concrete structure, and comprises a horizontal displacement limiting bottom plate and a pair of H-shaped steels, wherein a second roller on the reinforced concrete structure is in sliding contact with the H-shaped steels, the reinforced concrete structure is positioned between the pair of H-shaped steels, and the two horizontal displacement limiting devices are respectively arranged at two sides of the rotation limiting device and jointly act on the reinforced concrete structure, so that the horizontal displacement of the reinforced concrete structure under the action of a strong power load can be effectively prevented, the horizontal energy release of the reinforced concrete structure is avoided, the precise acceptance performance test of the reinforced concrete structure is ensured, and the damage to the surrounding environment and personnel caused by the horizontal displacement is avoided. And the smooth test is ensured.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the drop weight tester of the present invention.
Fig. 3 is a schematic view of a reinforced concrete structure with an inflatable air bag and a steel plate bound according to the present invention.
FIG. 4 is a schematic view of a sliding fixing base according to the present invention.
FIG. 5 is another perspective view of the sliding type fixing base of the present invention.
Fig. 6 is a schematic view of the force measuring mechanism of the present invention.
Fig. 7 is another view of the force measuring mechanism of the present invention.
Fig. 8 is a schematic view of the rotation limiting device of the present invention.
Fig. 9 is a schematic view of the rotation limiting device of the present invention after being assembled with a reinforced concrete structure.
Fig. 10 is a schematic view of the horizontal displacement limiting device of the present invention.
Fig. 11 is a schematic view of the horizontal displacement limiting device of the present invention after being assembled with a reinforced concrete structure.
FIG. 12 is a schematic view of a reaction frame of the present invention.
Fig. 13 is a connection block diagram of each electrical device of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-reinforced concrete structure, 2-inflatable air bag, 3-steel plate, 4-drop hammer tester, 5-first force sensor, 6-sliding fixed seat, 7-reaction frame, 8-first hinged seat, 9-second hinged seat, 10-third force sensor, 11-rotation limiting bottom plate, 12-rotation limiting guide mechanism, 13-angle steel, 14-guide groove, 15-screw, 16-horizontal displacement limiting bottom plate, 17-H steel, 18-second roller, 19-PC, 20-switching mechanism, 21-force measuring mechanism, 22-rotation limiting device, 23-horizontal displacement limiting device, 61-side column, 62-hinged support, 63-upper hinged support, 64-rotating shaft, 4-drop hammer tester, 65-lower hinged support, 66-first roller, 67-supporting steel plate and 68-second force sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-13, the system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load has the advantages of simple structure, scientific and reasonable design and convenient use, and can quickly and efficiently simulate the progressive collapse resistance of the reinforced concrete structure under the environment of the strong power load action such as explosion. The invention comprises a fixing device for fixing two ends of a reinforced concrete structure 1, a strong power loading mechanism for loading strong power load on the reinforced concrete structure 1, and a PC 19 respectively connected with the fixing device and the strong power loading mechanism; the reinforced concrete structure 1 is provided with a conversion mechanism 20 for converting concentrated strong dynamic load into distributed explosive load.
The invention mainly comprises a fixing device, a strong power loading mechanism, a conversion mechanism and a PC (personal computer), wherein the fixing device is fixed with two ends of the reinforced concrete structure, the strong power loading mechanism is directly loaded on the conversion mechanism, the force is transferred to the reinforced concrete structure by the conversion mechanism, and the whole stress of the reinforced concrete structure is equivalent to the stress in the environments such as explosion and the like through the uniform force of the conversion mechanism. The PC is used for receiving stress information of the parts connected with the PC and displaying and storing the stress information, so that a tester can analyze and summarize the stress information conveniently. Therefore, the continuous collapse resistance of the reinforced concrete structure under the environment of strong dynamic load action such as explosion can be simulated and tested quickly and efficiently.
The conversion mechanism 20 of the present invention comprises an inflatable air bag 2 provided on a reinforced concrete structure 1, and a steel plate 3 provided on the inflatable air bag 2. The strong power loading mechanism is a drop hammer testing machine 4, and the bottom of the drop hammer testing machine 4 is provided with a first force sensor 5 connected with a PC 19.
The conversion mechanism of the invention comprises an inflatable airbag and a steel plate, the whole thickness of the inflatable airbag is at least 50mm, the whole thickness of the steel plate is at least 30mm, the inflatable airbag can be bound on the top surface of the reinforced concrete structure through a binding rope and the like, the steel plate can be bound on the top surface of the inflatable airbag through the binding rope and the like, a drop hammer testing machine hits the steel plate at a certain speed through a control system of the drop hammer testing machine, the steel plate transmits force to the inflatable airbag, the inflatable airbag transmits force to the reinforced concrete structure, thus, the reinforced concrete structure is stressed uniformly, the impact of the blast wave in the environments of explosion and the like can be effectively reduced, therefore, the continuous collapse resistance of the reinforced concrete structure under the strong power load action environment such as explosion can be effectively simulated and tested, the first force sensor is arranged at the bottom of the drop hammer tester and is impacted by the first force sensor and the steel plate, and the PC machine receives stress parameter information transmitted by the first force sensor in real time to store and display the stress parameter information.
The fixing device comprises a reaction frame 7, a sliding type fixing seat 6 fixed with the end part of the reinforced concrete structure 1, and a force measuring mechanism 21 arranged between the sliding type fixing seat 6 and the reaction frame 7; at least two force measuring mechanisms 21 are arranged, and the force measuring mechanisms 21 are distributed between the sliding type fixed seat 6 and the counter-force frame 7 at equal intervals.
The fixing device comprises a reaction frame, a sliding fixing seat and a force measuring mechanism, wherein the reinforced concrete structure is fixed with the sliding fixing seat, and the reinforced concrete structure sequentially transmits force to the sliding fixing seat, the force measuring mechanism and the reaction frame when the reinforced concrete structure is subjected to performance test. The reaction frame is a steel structure frame body formed by welding thick steel plates, the thickness of the thick steel plates is at least 5cm, and the steel structure frame body is fixed on the ground and bears the impact force conducted in the horizontal direction to the reinforced concrete structure in the test process. The force measuring mechanism conveys stress parameter information to the PC for storage and display, the sliding type fixing seat supports the reinforced concrete structure in the vertical direction on one hand, and can slide in the horizontal direction on the other hand, so that force can be conveniently transferred to the force measuring mechanism, the two force measuring mechanisms are adopted, the upper limit of force measurement can be improved on the one hand, and the overall stability of the fixing device can also be improved through the parallel distribution structure on the other hand.
The sliding type fixed seat 6 comprises a side column 61 fixed with the end part of the reinforced concrete structure 1, a hinged support 62 arranged at the bottom of the side column 61 and a force measuring seat; the hinge mounts 62 are located on the load cell. The hinge support 62 includes an upper hinge support 63 fixed to the bottom of the side post 61, and a lower hinge support 65 hinged to the upper hinge support 63 by a rotating shaft 64, and a first roller 66 is provided at the bottom of the lower hinge support 65. The force measuring base comprises a bearing steel plate 67 for bearing the hinge support 62 and a second force sensor 68 arranged at the bottom of the bearing steel plate 67 and connected with the PC 19.
The sliding type fixing seat comprises a side column, a hinged support and a force measuring seat, wherein the hinged support comprises an upper hinged support, a rotating shaft, a lower hinged support and a first roller, the force measuring seat comprises a bearing steel plate and a second force sensor, the hinged support is used for releasing rotation restraint through the rotating shaft and is matched with the first roller to realize real-time force transmission to a force measuring mechanism, and the second force sensor can monitor the impact force in the vertical direction transmitted by a reinforced concrete structure on the whole sliding type fixing seat in real time and transmit the monitored impact force information to a PC (personal computer) in real time for display and storage. Be connected between limit post and the reinforced concrete structure tip, can wear to establish to the limit post in the screwed reinforcement of reinforced concrete structure tip through the anchor again after fixed mutually with the nut of screwed reinforcement looks adaptation, also can be trompil on the limit post, the grafting post is established to reinforced concrete structure tip, the reinforced concrete structure tip is pegged graft in the limit post trompil through the grafting post, the half of reinforced concrete structure cross-section girth can not be surpassed at most to grafting post cross-section girth, in order to guarantee that reinforced concrete structure tip horizontal direction can unload power to the limit post completely.
The force measuring mechanism 21 comprises a first hinged seat 8 arranged on a reaction frame 7, a second hinged seat 9 arranged on a sliding fixed seat 6, and a third force sensor 10, wherein two ends of the third force sensor are respectively hinged with the first hinged seat 8 and the second hinged seat 9 and connected with a PC 19.
The force measuring mechanism comprises a first hinged seat, a second hinged seat and a third force sensor. And the third force sensors are horizontally distributed, so that the impact force conducted by the reinforced concrete structure on the sliding fixing seat in the horizontal direction can be effectively monitored, and the monitored impact force information is transmitted to the PC for displaying and storing in real time.
The invention also comprises a rotation limiting device 22 arranged in the middle of the reinforced concrete structure 1 and used for limiting the rotation of the reinforced concrete structure 1, wherein the rotation limiting device 22 comprises a rotation limiting bottom plate 11 and a pair of rotation limiting guide mechanisms 12 arranged on the rotation limiting bottom plate 11 and respectively arranged at two sides of the middle of the reinforced concrete structure 1, the rotation limiting guide mechanisms 12 comprise a pair of angle steels 13 which are fixed on the rotation limiting bottom plate 11 and are distributed in parallel, a guide groove 14 is formed between the two angle steels 13, and the reinforced concrete structure 1 is provided with a screw rod 15 which is matched with the guide groove 14 and is positioned in the guide groove 14.
The invention is provided with a rotation limiting device in the middle of the reinforced concrete structure, which is used for limiting the reinforced concrete structure to rotate under the action of strong dynamic load. The rotary limiting device comprises a rotary limiting bottom plate and a pair of rotary limiting guide mechanisms, the rotary limiting guide mechanisms are composed of a pair of parallel-distributed angle steels, a guide groove is formed between the two angle steels, and the screws extending out of the two sides of the reinforced concrete structure are located in the guide groove. By the design, the reinforced concrete structure can not rotate to release energy when being subjected to the action of strong dynamic load. And the smooth test is ensured.
The invention also comprises at least two horizontal displacement limiting devices 23 which are arranged in the middle of the reinforced concrete structure 1 and used for limiting the horizontal movement of the reinforced concrete structure 1, wherein each horizontal displacement limiting device 23 comprises a horizontal displacement limiting bottom plate 16 and a pair of H-shaped steels 17 arranged on the horizontal displacement limiting bottom plate 16, the pair of H-shaped steels 17 are respectively arranged at two sides of the reinforced concrete structure 1, second rollers 18 are arranged at two sides of the reinforced concrete structure 1, and the second rollers 18 are in sliding contact with the H-shaped steels 17.
The horizontal displacement limiting device is arranged in the middle of the reinforced concrete structure and used for limiting the horizontal movement of the reinforced concrete structure, and comprises a horizontal displacement limiting bottom plate and a pair of H-shaped steels, wherein a second roller on the reinforced concrete structure is in sliding contact with the H-shaped steels, the reinforced concrete structure is positioned between the pair of H-shaped steels, and the two horizontal displacement limiting devices are respectively arranged at two sides of the rotation limiting device and jointly act on the reinforced concrete structure, so that the horizontal displacement of the reinforced concrete structure under the action of a strong power load can be effectively prevented, the horizontal energy release of the reinforced concrete structure is avoided, the precise acceptance performance test of the reinforced concrete structure is ensured, and the damage to the surrounding environment and personnel caused by the horizontal displacement is avoided. And the smooth test is ensured.
The reinforced concrete structure of the invention usually causes direct damage of part of components and damage of part of components to a certain extent under the strong dynamic load such as explosion, and the damage degree of the reinforced concrete structure under the action of the explosion load can be rapidly calculated through the original data tested by the testing system of the invention. Damage degree D of reinforced concrete structure under action of explosive loadRMCalculated by equation (1).
DRM＝1-fresidual(Rmax)/fN1 (1)
In the formula (1), fresidual(Rmax)Is the residual limit bearing capacity, f, of the reinforced concrete beam column structure in the limit collapse state after the action of strong dynamic loads such as explosion and the likeN1The ultimate bearing capacity of the undamaged reinforced concrete beam column structure is realized.
The PC, the first force sensor, the second force sensor, the drop hammer testing machine and other equipment used in the invention are all known products, and can be directly purchased and used in the market, and the structure, the circuit, the transmission control principle and the auxiliary equipment are all known technologies, so the structure, the circuit, the transmission control principle and the auxiliary equipment of the PC, the first force sensor, the second force sensor, the drop hammer testing machine and other equipment used in the invention are not repeated.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.
Claims (10)
1. Reinforced concrete structure resistance to progressive collapse capability test system under strong power load, its characterized in that: comprises a fixing device used for fixing two ends of a reinforced concrete structure (1), a strong power loading mechanism used for loading strong power load on the reinforced concrete structure (1), and a PC (19) respectively connected with the fixing device and the strong power loading mechanism; the reinforced concrete structure (1) is provided with a conversion mechanism (20) for converting concentrated strong dynamic load into distributed explosive load.
2. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 1, wherein: the conversion mechanism (20) comprises an inflatable air bag (2) arranged on the reinforced concrete structure (1) and a steel plate (3) arranged on the inflatable air bag (2).
3. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 1, wherein: the strong power loading mechanism is a drop hammer testing machine (4), and a first force sensor (5) connected with a PC (19) is arranged at the bottom of the drop hammer testing machine (4).
4. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 1, wherein: the fixing device comprises a reaction frame (7), a sliding fixing seat (6) fixed with the end part of the reinforced concrete structure (1), and a force measuring mechanism (21) arranged between the sliding fixing seat (6) and the reaction frame (7); at least two force measuring mechanisms (21) are arranged, and the force measuring mechanisms (21) are distributed between the sliding type fixed seat (6) and the counter-force frame (7) at equal intervals.
5. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 4, wherein: the sliding type fixed seat (6) comprises a side column (61) fixed with the end part of the reinforced concrete structure (1), a hinged support (62) arranged at the bottom of the side column (61) and a force measuring seat; the hinged support (62) is positioned on the force measuring base.
6. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 5, wherein: the hinged support (62) comprises an upper hinged support (63) fixed with the bottom of the side column (61), and a lower hinged support (65) hinged with the upper hinged support (63) through a rotating shaft (64), and a first roller (66) is arranged at the bottom of the lower hinged support (65).
7. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 5, wherein: the force measuring seat comprises a bearing steel plate (67) used for bearing the hinged support (62), and a second force sensor (68) arranged at the bottom of the bearing steel plate (67) and connected with the PC (19).
8. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 4, wherein: the force measuring mechanism (21) comprises a first hinged seat (8) arranged on the reaction frame (7), a second hinged seat (9) arranged on the sliding type fixed seat (6), and a third force sensor (10) with two ends hinged with the first hinged seat (8) and the second hinged seat (9) respectively and connected with a PC (19).
9. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 1, wherein: still including locating reinforced concrete structure (1) middle part and being used for restricting rotatory rotation limiting device (22) of reinforced concrete structure (1), rotation limiting device (22) are including rotation limiting bottom plate (11), and locate on rotation limiting bottom plate (11) and arrange in a pair of rotation limiting guide mechanism (12) of reinforced concrete structure (1) middle part both sides separately, rotation limiting guide mechanism (12) are including a pair of angle steel (13) that are fixed in on rotation limiting bottom plate (11) and parallel distribution each other, be formed with guide way (14) between two angle steel (13), be equipped with on reinforced concrete structure (1) with guide way (14) looks adaptation and be located screw rod (15) of guide way (14).
10. The system for testing the progressive collapse resistance of the reinforced concrete structure under the strong power load according to claim 1, wherein: the horizontal displacement limiting device comprises at least two horizontal displacement limiting devices (23) arranged in the middle of the reinforced concrete structure (1) and used for limiting horizontal displacement of the reinforced concrete structure (1), each horizontal displacement limiting device (23) comprises a horizontal displacement limiting bottom plate (16), a pair of H-shaped steels (17) arranged on the horizontal displacement limiting bottom plates (16), the pair of H-shaped steels (17) are respectively arranged on two sides of the reinforced concrete structure (1), second rollers (18) are arranged on two sides of the reinforced concrete structure (1), and the second rollers (18) are in sliding contact with the H-shaped steels (17).
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| CN116577455A (en) * | 2023-05-06 | 2023-08-11 | 重庆大学 | Fire resistance test method and device for fire resistance cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577455A (en) * | 2023-05-06 | 2023-08-11 | 重庆大学 | Fire resistance test method and device for fire resistance cable |
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