CN109916706B - Concrete solid support member antiknock performance test device - Google Patents
Concrete solid support member antiknock performance test device Download PDFInfo
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Abstract
The invention relates to a test device for the anti-explosion performance of a concrete supporting member, which comprises a supporting seat, a fixed seat, a member fixing cover and an explosive suspension positioner, wherein the supporting seat comprises four basic supporting units, and cantilevers of the four basic supporting units are fixedly connected through connecting pipes so that the four basic supporting units form a test frame with a square outer outline on the upper surface; the fixing seat comprises a base plate and a support, wherein a semicircular component mounting groove is formed in the support, a component fixing cover is installed above the support, and two adjacent base plates are oppositely arranged and a concrete component to be tested is installed between the supports. This application can realize that different components antiknock performance under same blast load effect is experimental, hangs the locator through the explosive and can fix the center at the test stand with the explosive, and the explosive is the same to the effect of each concrete member that awaits measuring after initiating explosion, overcomes the experimental error that the discreteness that causes because of explosive itself property of a medicine causes.
Description
Technical Field
The invention relates to civil engineering component testing and blasting testing technology, in particular to a test device for the anti-explosion performance of a concrete supporting component.
Background
The structure test is to explore the relevant performance of the structure under different load effects, the explosion is taken as a special load, and the main characteristic is the local excitation of shock waves in a short time, the static property different from the structure dead load, and the full structure excitation different from the earthquake load dynamic load. The explosion shock wave can not only cause the damage of the building structure, but also cause the great loss of life and property, so that the development of the stress shock response research of the concrete structural member under the explosion shock load has important significance.
In the concrete supporting member anti-explosion performance research, the anti-explosion performance research is carried out on members with different section shapes, different sizes, different slenderness ratios and different concrete strengths under the action of explosives with the same explosive amount, the optimal reinforcement ratio, slenderness ratio and hoop ratio (namely the ratio of the wall thickness of the steel pipe to the section size of the concrete) are determined, and the concrete supporting member anti-explosion performance research has higher engineering application value. However, the explosives have discreteness of medicine properties, and density difference and volume difference caused by operation errors in the process of casting the explosive columns also influence the medicine properties and are influenced by factors of the initiation point position, initiation time, air humidity, air speed and the like, so that shock wave overpressure values generated by different times of initiation are greatly different even under the same explosive quantity and the same test environment, and the accuracy of explosion impact test research is seriously influenced.
Disclosure of Invention
The invention aims to provide a test device for the anti-explosion performance of a concrete supporting member, which is used for realizing the anti-explosion performance test of different members under the action of the same explosion load.
In order to solve the problems, the invention provides a test device for the anti-explosion performance of a concrete supporting member, which comprises a supporting seat, a fixed seat, a member fixing cover and an explosive suspension positioner, wherein the supporting seat comprises four basic supporting units, each basic supporting unit comprises a supporting frame which is formed by welding square steel pipes, the outer outline of the upper surface of each supporting frame is square, two adjacent outer side surfaces on each supporting frame extend outwards to form cantilevers for connection and fixation, the cantilevers of the four basic supporting units are connected and fixed through connecting pipes to enable the four basic supporting units to form a test frame with the outer outline of the upper surface of the square, the cantilevers and the connecting pipes are respectively provided with a plurality of connecting holes and fixedly connected through bolts, and the side length of the test frame can be adjusted by adjusting the connecting positions of the cantilevers and the connecting pipes; the fixing seat comprises a base plate and supports, the base plate is fixedly arranged on the upper surface of the support frame, the supports are fixedly connected with the base plate and the support frame through bolts, semicircular component mounting grooves are formed in the supports, two supports are arranged on each base plate, and the central lines of the semicircular component mounting grooves in the two supports are perpendicular to each other; the component fixing cover is arranged above the support, and a concrete component to be tested is arranged between two oppositely arranged supports on two adjacent backing plates; the explosive suspension positioner comprises a supporting part and a horizontal suspension rod, wherein the horizontal suspension rod is provided with a hook which is used for suspending explosives at the center of the supporting frame and at the position with the same mounting height as the concrete member to be tested.
The test device for the anti-explosion performance of the concrete supporting member provided by the invention also has the following technical characteristics:
furthermore, the cantilever and the connecting pipe are both square steel pipes, and the outer diameter of the connecting pipe is smaller than the inner diameter of the cantilever; and fine sand is filled in the inner cavities of the support frame, the cantilever and the connecting pipe.
Furthermore, the component fixing cover is provided with a semicircular component fixing groove corresponding to the semicircular component mounting groove on the support, and the component fixing cover is fixedly connected with the support through a bolt and fixes the cylindrical concrete component to be tested between the support and the component fixing cover.
Further, the component fixing cover comprises two I-steel bases and a top plate, the lower wing plates of the two I-steel bases are fixedly connected with the support through bolts, connecting holes are formed in the upper wing plates of the two I-steel bases, and the two I-steel bases are respectively connected with the top plate through double-head fixing screws and fix the rectangular concrete component to be tested between the support and the top plate.
Furthermore, the two ends of the double-head fixing screw rod are respectively provided with a riveting angle steel for fixing the side surface of the concrete member to be detected in a penetrating and fixing mode, and a rubber plate is clamped between the riveting angle steel and the side surface of the concrete member to be detected.
Furthermore, the supporting part of the explosive suspension positioner comprises a base and a double-threaded screw, a threaded hole is formed in the base, and the lower end of the double-threaded screw is fixedly connected with the base through the threaded hole; the utility model discloses a suspension device, including double-end screw rod, horizontal hanging rod, hanger, tee junction spare, the screw thread section of double-end screw rod's upper end installs three way connection spare, the one end of horizontal hanging rod with three way connection spare passes through threaded connection fixedly, the other end of horizontal hanging rod is equipped with prevents rings roll-off the dog of horizontal hanging rod, the couple hangs through the lifting rope on the rings.
Furthermore, scale marks are marked on the horizontal suspension rod so as to adjust the position of the hanging ring.
Further, the center of the concrete member that awaits measuring still overlaps with apart from tip third department and is equipped with solid fixed ring, gu fixed ring can be used to install the explosive shock wave excess pressure tester, still installs the foil gage on the concrete member that awaits measuring.
The invention has the following beneficial effects: the test stand is formed by splicing four basic supporting units, the outer contour of the upper surface of the test stand is square, four same or different concrete members to be tested can be simultaneously installed on the supporting frame, and the anti-explosion performance test of different members under the same explosive load effect can be realized; the explosive can be fixed in the center of the test rack through the explosive suspension positioner, the effect of the explosive on each concrete member to be tested after the explosive is exploded is the same, and the test error caused by the discreteness of the explosive property is overcome; the side length of the connecting position adjustment test stand of cantilever and connecting pipe is adjusted to the accessible when four basic support unit splices, is convenient for dismantle and assembles, and can carry out the aspect ratio in the certain limit and adjust, satisfies the test needs of the concrete member that awaits measuring of different aspect ratio sizes, very big increase the commonality and the convenience of device.
Drawings
FIG. 1 is a schematic structural diagram of a base support unit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a support base according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a fixing base according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a test apparatus according to an embodiment of the present invention;
FIG. 5 is a top view of the test device of FIG. 4;
FIG. 6 is a front view of the test device of FIG. 4;
FIG. 7 is a schematic structural view of a test apparatus according to another embodiment of the present invention;
FIG. 8 is an enlarged view of a portion A of FIG. 7;
FIG. 9 is a top view of the test device of FIG. 7;
FIG. 10 is a front view of the test device of FIG. 7;
fig. 11 is a partial enlarged view of a portion B in fig. 10;
fig. 12 is a schematic structural view of an explosive suspension positioner in an embodiment of the invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The test device for the anti-explosion performance of the concrete supporting member, shown in fig. 1 to 12, comprises a support seat 10, a fixed seat 20, a member fixing cover 30 and an explosive suspension positioner 40, wherein the support seat 10 comprises four basic support units 11, each basic support unit 11 comprises a support frame 111 which is formed by welding square steel pipes and has a square outer outline on the upper surface, two adjacent outer side surfaces on the support frames 111 extend outwards to form cantilevers 112 for connection and fixation, the cantilevers 112 of the four basic support units 11 are connected and fixed through connecting pipes 12 to enable the four basic support units 11 to form a test frame with a square outer outline on the upper surface, a plurality of connecting holes are formed in each of the cantilevers 112 and the connecting pipes 12 and are fixedly connected through bolts, and the side length of the test frame can be adjusted by adjusting the connecting positions of the cantilevers 112 and the connecting pipes; the fixing seat 20 comprises a backing plate 21 and supports 22, the backing plate 21 is fixedly arranged on the upper surface of the support frame 111, the supports 22 are fixedly connected with the backing plate 21 and the support frame 111 through bolts, semicircular component mounting grooves are formed in the supports 22, two supports 22 are arranged on each backing plate 21, and the central lines of the semicircular component mounting grooves in the two supports 22 are perpendicular to each other; a component fixing cover 30 is arranged above the support 22, and a concrete component to be tested is arranged between two oppositely arranged supports 22 on two adjacent backing plates 21; the explosive suspension positioner 40 comprises a support part 41 and a horizontal suspension rod 42, wherein the horizontal suspension rod 42 is provided with a hook 43 which is used for suspending explosives at the center of the support frame 10 and has the same installation height with the concrete member to be tested. In the application, the test frame with the square outer outline on the upper surface is formed by splicing the four basic supporting units, four same or different concrete members to be tested can be simultaneously installed on the supporting frame, and the anti-explosion performance test of different members under the action of the same explosion load can be realized; the explosive can be fixed in the center of the test rack through the explosive suspension positioner, the effect of the explosive on each concrete member to be tested after the explosive is exploded is the same, and the test error caused by the discreteness of the explosive property is overcome; the side length of the connecting position adjustment test stand of cantilever and connecting pipe is adjusted to the accessible when four basic support unit splices, is convenient for dismantle and assembles, and can carry out the aspect ratio in the certain limit and adjust, satisfies the test needs of the concrete member that awaits measuring of different aspect ratio sizes, very big increase the commonality and the convenience of device.
In the above embodiment of the application, the fixed ends of two adjacent concrete members to be tested are respectively placed in the transverse direction and the longitudinal direction of the same base plate, so that the members can be kept in the same plane and have the same distance with the initiation center point; the distance between the basic supporting units can be adjusted according to the size of the test component, meanwhile, the explosive positioning system can also realize adjustment of different positions, the sustainable recycling of the test device is ensured, and the joints of the device are connected by high-strength bolts, so that the device is favorable for quick disassembly and assembly and strong in carrying and transportation performance; the explosive is detonated to generate spherical detonation waves, a plurality of components generate dynamic response under the action of the same impact load, the impact wave load of each component is the same in size and direction, the mechanical property research under the action of the same explosion impact load is facilitated, and the data has comparability; the supporting seat of the test device adopts a frame structure, and sand bags can be stacked at the bottom of the supporting seat, so that shock waves of explosion load to the ground can be absorbed, the stability of foundation support can be kept, and adverse factors of a solid support system which are influenced by the vibration generated by the shock waves to the test result are eliminated; this test device is unimpeded under the explosion shock wave, can guide dispersion shock wave to the sand bag of supporting seat bottom on, has greatly avoided causing the secondary impact to the test member because of backing plate or supporting member reflection explosion shock wave, has further reduced experimental interference factor, has guaranteed the validity of data.
In one embodiment of the present application, preferably, the cantilever 112 and the connecting tube 12 are both square steel tubes, and the outer diameter of the connecting tube 12 is smaller than the inner diameter of the cantilever 112; the internal cavities of the support frame 111, the cantilever 112 and the connecting pipe 12 are also filled with fine sand, so that the explosion impact force can be further buffered to improve the stability of the test device.
In one embodiment of the present application, it is preferable that the member fixing cover 30 is provided with semicircular member fixing grooves corresponding to the semicircular member mounting grooves on the support 22, and the member fixing cover 30 is fixed to the support 22 by bolts and fixes the cylindrical concrete member 001 to be tested between the support 22 and the member fixing cover 30. Specifically, the radius of the semicircular member mounting groove on the support 22 is the same as that of the semicircular member fixing groove on the member fixing cover 30, the radius of the mounting groove and the radius of the fixing groove may be designed according to the size of the member to be measured, and the support 22 and the member fixing cover 30 of different specifications may be prefabricated for use.
In one embodiment of the present application, preferably, the member fixing cover 30 includes two i-steel bases 31 and a top plate 32, lower wing plates of the two i-steel bases 31 are fixedly connected to the support 22 by bolts, upper wing plates of the two i-steel bases 31 are provided with connecting holes, and the two i-steel bases 31 are respectively connected to the top plate 33 by double-headed fixing screws 32 and fix the rectangular concrete member 002 to be tested between the support 22 and the top plate 33. Preferably, both ends of the double-ended fixing screw 32 are respectively provided with a riveting angle steel 34 for fixing the side surface of the concrete member to be tested in a penetrating manner, and a rubber plate 35 is further clamped between the riveting angle steel 34 and the side surface of the concrete member to be tested. The rectangular concrete member to be tested 002 is fixed between the support 22 and the top plate 33 through the double-end fixing screw rod 32, the mounting position of the top can be flexibly adjusted according to the size of the member to be tested, the fixing requirements of the members to be tested with different sizes are met, the explosion tests can be simultaneously carried out on the rectangular members with different sizes, the double-end fixing screw rod and the nut are utilized for quick mounting and fixing, the riveting strength is strong, the dismounting is convenient, and the sustainable repeated utilization rate is high; the thickness and the number of the rubber plates can be increased to further guarantee the matching of the rectangular cross-section members and the riveted angle steel, the defect that the distance between bolt holes is fixed and cannot be finely adjusted is overcome, the riveting strength of the angle steel is effectively increased, the friction damage between the end parts of the concrete members fixedly supported and the angle steel when the end parts of the concrete members are subjected to the explosion impact force is reduced, and the requirements of the fixedly supported and the members with different rectangular cross-section sizes are accurately controlled.
In one embodiment of the present application, preferably, the supporting portion 41 of the explosive hanging locator 40 comprises a base 411 and a double-threaded screw 412, wherein the base 411 is provided with a threaded hole, and the lower end of the double-threaded screw 412 is fixedly connected with the base through the threaded hole; the threaded section of the upper end of the double-thread screw 412 is provided with a three-way connecting piece 413, one end of the horizontal suspension rod 42 is fixedly connected with the three-way connecting piece 413 through threads, the other end of the horizontal suspension rod 42 is provided with a stop 421 for preventing the hanging ring from sliding out of the horizontal suspension rod 42, and the hook 43 is hung on the hanging ring through a hanging rope. In the present application, the height of the horizontal suspension bar 42 can be adjusted by changing the installation height of the three-way connection 413. Preferably, base 411 adopts threaded hole's weight, and the threaded hole weight of a plurality of major diameters of accessible stack increases vertical height and stability, if explode the heart vertical height and can't satisfy the required precision through adjusting double-end screw and tee junction spare, still can finely tune the accurate location that realizes exploding the heart through the lifting rope that hangs explosive device. Preferably, the horizontal suspension rod 42 is also marked with scale marks so as to adjust the position of the hanging ring, and the horizontal distance of the explosive is accurately controlled by moving the hanging ring on the scale marks of the horizontal suspension rod, so that the adjustment is convenient.
In an embodiment of the application, preferably, the center and a third distance from the end of the concrete member to be tested are further sleeved with a fixing ring 50, the fixing ring 50 can be used for installing an explosion shock wave overpressure tester, the concrete member to be tested is also provided with a strain gauge, the stress of the member to be tested under the explosion shock can be collected through sensors such as the explosion shock wave overpressure tester and the strain gauge, and preferably, the sensors are all in a wireless transmission mode; the explosion shock wave overpressure tester, the type of the strain gauge and the signal acquisition and processing process can be designed and selected by those skilled in the art according to the needs, and are not described in detail herein.
In the above embodiments of the present application, preferably, each of the pipes and the plates is made of a steel material with a model number of Q345B, and the rubber plate is a flame-retardant and high-temperature-resistant rubber plate.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A test device for the anti-explosion performance of a concrete supporting member comprises a supporting seat, a fixed seat, a member fixing cover and an explosive suspension positioner, and is characterized in that the supporting seat comprises four basic supporting units, each basic supporting unit comprises a supporting frame which is formed by welding square steel pipes, the outer outline of the upper surface of each supporting frame is square, two adjacent outer side surfaces on each supporting frame extend outwards to form cantilevers for connection and fixation, the cantilevers of the four basic supporting units are fixedly connected through connecting pipes to enable the four basic supporting units to form a test frame, the outer outline of the upper surface of each test frame is square, a plurality of connecting holes are formed in each cantilever and each connecting pipe and fixedly connected through bolts, and the side length of each test frame can be adjusted by adjusting the connecting position of each cantilever and each connecting pipe; the fixing seat comprises a base plate and supports, the base plate is fixedly arranged on the upper surface of the support frame, the supports are fixedly connected with the base plate and the support frame through bolts, semicircular component mounting grooves are formed in the supports, two supports are arranged on each base plate, and the central lines of the semicircular component mounting grooves in the two supports are perpendicular to each other; the component fixing cover is arranged above the support, and a concrete component to be tested is arranged between two oppositely arranged supports on two adjacent backing plates; the explosive suspension positioner comprises a supporting part and a horizontal suspension rod, wherein the horizontal suspension rod is provided with a hook which is used for suspending explosives at the center of the supporting frame and at the position with the same mounting height as the concrete member to be tested.
2. The test device of claim 1, wherein: the cantilever and the connecting pipe are both square steel pipes, and the outer diameter of the connecting pipe is smaller than the inner diameter of the cantilever; and fine sand is filled in the inner cavities of the support frame, the cantilever and the connecting pipe.
3. The test device of claim 1, wherein: the component fixing cover is provided with a semicircular component fixing groove corresponding to the semicircular component mounting groove on the support, and the component fixing cover is fixedly connected with the support through a bolt and fixes the cylindrical concrete component to be tested between the support and the component fixing cover.
4. The test device of claim 1, wherein: the component fixing cover comprises two I-steel bases and a top plate, wherein the lower wing plates of the I-steel bases are fixedly connected with the support through bolts, the upper wing plates of the I-steel bases are provided with connecting holes, and the two I-steel bases are respectively connected with the top plate through double-end fixing screws and fix the rectangular concrete component to be detected between the support and the top plate.
5. The testing device of claim 4, wherein: the two ends of the double-end fixing screw rod are respectively provided with a riveting angle steel for fixing the side surface of the concrete member to be detected in a penetrating mode, and a rubber plate is clamped between the riveting angle steel and the side surface of the concrete member to be detected.
6. The test device of claim 1, wherein: the supporting part of the explosive suspension positioner comprises a base and a double-end screw rod, a threaded hole is formed in the base, and the lower end of the double-end screw rod is fixedly connected with the base through the threaded hole; the utility model discloses a suspension device, including double-end screw rod, horizontal hanging rod, hanger, tee junction spare, the screw thread section of double-end screw rod's upper end installs three way connection spare, the one end of horizontal hanging rod with three way connection spare passes through threaded connection fixedly, the other end of horizontal hanging rod is equipped with prevents rings roll-off the dog of horizontal hanging rod, the couple hangs through the lifting rope on the rings.
7. The test device of claim 6, wherein: and scale marks are further engraved on the horizontal suspension rod so as to adjust the position of the hanging ring.
8. The test device of claim 1, wherein: the center of concrete member that awaits measuring still overlaps with apart from tip third department and is equipped with solid fixed ring, gu fixed ring can be used to install the blast shock wave excess pressure tester, still installs the foil gage on the concrete member that awaits measuring.
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| CN201910186994.3A CN109916706B (en) | 2019-03-13 | 2019-03-13 | Concrete solid support member antiknock performance test device |
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| CN111089808A (en) * | 2019-12-30 | 2020-05-01 | 哈尔滨工程大学 | Composite material laminated structure antiknock characteristic test device |
| CN113189141B (en) * | 2021-04-21 | 2023-01-13 | 哈尔滨工业大学 | Shrinkage ratio experimental device for explosion damage of complex reinforced concrete structure |
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| CN202066762U (en) * | 2011-04-25 | 2011-12-07 | 中国人民解放军总参谋部工程兵科研三所 | Anti-explosion test model room for geotechnical engineering |
| AU2012334818B2 (en) * | 2011-11-11 | 2016-03-03 | Orica International Pte Ltd | Vibration analysis for blasting |
| JP2013224856A (en) * | 2012-04-20 | 2013-10-31 | Toyota Motor Corp | Simulation method for calculating explosion strength of high pressure tank |
| DE102013105975A1 (en) * | 2013-06-10 | 2014-12-11 | Ficht Fahrzeug + Marinetechnik Gmbh & Co. Kg | Test bench for detonative investigations |
| CN103353426B (en) * | 2013-06-27 | 2015-08-05 | 西北核技术研究所 | A kind of measurement mechanism of Cylindrical Explosion Vessel axial load and measuring method |
| CN104596870B (en) * | 2015-02-12 | 2017-04-12 | 西安近代化学研究所 | Device and method for measuring pressure of shock waves in concrete medium |
| CN105136577B (en) * | 2015-09-22 | 2017-07-21 | 河南科技大学 | A kind of assembled multifunction test device |
| CN106248507B (en) * | 2016-07-11 | 2019-03-15 | 中北大学 | A kind of civil engineering structure explosion injury experiment platform |
| CN106932286A (en) * | 2017-04-13 | 2017-07-07 | 太原科技大学 | A kind of plane detonation loading experimental apparatus based on hot spot-effect |
| CN108593468A (en) * | 2018-03-30 | 2018-09-28 | 上海理工大学 | The model test apparatus that detonation load influences building and tunnel |
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