CN115950761A - Detection device and detection method for shear-resistant bearing capacity of connecting piece combined insulation board - Google Patents
Detection device and detection method for shear-resistant bearing capacity of connecting piece combined insulation board Download PDFInfo
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- CN115950761A CN115950761A CN202211551677.5A CN202211551677A CN115950761A CN 115950761 A CN115950761 A CN 115950761A CN 202211551677 A CN202211551677 A CN 202211551677A CN 115950761 A CN115950761 A CN 115950761A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
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Abstract
The invention relates to the technical field of buildings and discloses a detection device and a detection method for the shear-resistant bearing capacity of a connecting piece combined heat-insulation plate. The detection device of the present invention includes: detect sample, loading frame and universal tester, detect the sample and include: the concrete wall comprises a concrete wall body, an insulation board, a connecting piece and a plastic film, wherein the insulation board is arranged on the concrete wall body through the connecting piece, the plastic film is arranged between the insulation board and the concrete wall body, and the loading frame is clamped at the top end of the concrete wall body. According to the detection device and the detection method, the detection sample is placed on the universal testing machine, the universal testing machine applies vertical downward shearing force to the heat insulation plate and the connecting piece until the heat insulation plate and the connecting piece are damaged, the universal testing machine records the loaded maximum stress value and the load-displacement relation curve so as to evaluate the shearing resistance safety effect of the connecting piece on the external wall external heat insulation integrated system, and the performance evolution of the connecting piece and the heat insulation plate under the shearing stress effect of the external wall external heat insulation integrated system is analyzed.
Description
Technical Field
The embodiment of the invention relates to the technical field of buildings, in particular to a device and a method for detecting the shear bearing capacity of a connecting piece combined heat-insulation board.
Background
In recent years, the wall insulation system in China frequently has the quality problems of cracking, hollowing and the like, even has the problem of large-area falling off and the like which endanger the safety of residents, and is highly concerned by citizens and management departments at all levels.
At present, the external wall insulation integration mode mainly comprises three types, namely a precast concrete sandwich insulation external wall panel system (hereinafter referred to as sandwich wall panel), a precast concrete inverted-beating insulation external wall panel system (hereinafter referred to as inverted-beating system) and a cast-in-place concrete composite insulation template external wall insulation system (hereinafter referred to as cast-in-place system). Sandwich wall panels are widely applied to building engineering at present, the sandwich wall panels are composed of outer leaf concrete, heat insulation plates and inner leaf concrete, the layers are connected through connecting pieces, and the sandwich wall panels are usually FRP connecting pieces in order to guarantee the thermal engineering of the wall panels. Compared with a precast concrete sandwich heat-insulation external wall panel system, the external leaf concrete structural layer of the sandwich wall panel is cancelled by the reverse beating system and the cast-in-place system, the external leaf concrete structural layer is formed by prefabricating the heat-insulation board and concrete in a factory or pouring in situ, the connection safety of the heat-insulation board and the concrete depends on double insurance combined by two modes of 'bonding' and 'anchoring', and the connection safety between system layers is mainly related to factors such as the material properties of the heat-insulation board and a connecting piece. Because the reverse beating system and the cast-in-place system belong to an external thermal insulation integrated system, a stainless steel connecting piece is usually selected as the connecting piece in order to ensure the safety of the protective layer. Because integration system (combination heated board) can bear different environmental load and structural load (inoxidizing coating dead weight, seismic force) hoisting, installation, operation stage, consequently need carry out the check calculation to the bearing capacity of combination heated board in different stages to verify through the experiment, and then propose key index requirement to the system.
The inventor of the application finds that a detection method for the interlayer shear resistance of an external thermal insulation integrated system such as a counter-beating system and a cast-in-place system is absent at present, the shear resistance of a connecting piece combined thermal insulation board can not be effectively detected by a related shear resistance detection method, the action mechanism of the shear resistance safety of the connecting piece combined thermal insulation integrated system is unclear, and the shear resistance of a wallboard matching connecting piece combined thermal insulation board and concrete is absent of a constraint index.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the shearing resistance and bearing capacity of a connecting piece combined heat-insulating plate, which can detect the shearing force borne by the connecting piece combined heat-insulating plate so as to solve the problems in the background technology.
The embodiment of the invention provides a detection device for the shearing resistance bearing capacity of a connecting piece combined heat-insulation board, which comprises: detecting a sample, a loading frame and a universal testing machine:
the test sample includes: the concrete wall comprises a concrete wall body, an insulation board, a connecting piece and a plastic film;
the connector includes: a connecting piece anchor rod and a connecting piece tail disc;
the connecting piece anchor rod is vertically arranged on the connecting piece tail disc, and the central axes of the connecting piece anchor rod and the connecting piece tail disc are mutually overlapped;
the concrete wall and the heat insulation plate are both in a cuboid shape;
the length of the heat insulation plate is the same as that of the concrete wall, and the height of the heat insulation plate is smaller than that of the concrete wall;
the section of the plastic film is larger than that of the heat-insulation plate;
the two insulation boards are respectively arranged on the front side and the rear side of the concrete wall, and the central lines of the insulation boards and the concrete wall are superposed in the height direction;
the plastic film is arranged between the heat insulation plate and the concrete wall body, so that the heat insulation plate and the concrete wall body are isolated from each other;
the two connecting piece anchor rods respectively penetrate through the central positions of the two insulation boards and extend into the concrete wall body, the tail disc of the connecting piece is abutted against the insulation boards, and the connecting piece anchor rods are perpendicular to the interface between the insulation boards and the concrete wall body;
the loading frame is U-shaped, and the wall thickness of the loading frame is greater than that of the heat-preservation plate;
the testing sample is arranged on a base of the universal testing machine, the loading frame is clamped at the top end of the concrete wall, the side wall of the loading frame abuts against the insulation board, the central line of the testing sample, the central line of the loading frame and the central axis of the universal testing machine coincide with each other, and the universal testing machine is used for loading the loading frame and recording a relation curve of load and displacement.
Based on the above scheme, the detection device for the shear-resistant bearing capacity of the connecting piece combined insulation board provided by the invention has the advantages that through the arrangement of the detection sample, the loading frame and the universal testing machine, the detection sample comprises: concrete wall, heated board, connecting piece and plastic film, two heated boards set up both sides around concrete wall respectively, and plastic film sets up between heated board and concrete wall, makes heated board and concrete wall mutual isolation, and the central point that the heated board was worn to establish by the connecting piece stock puts, fixes the heated board on concrete wall, and the loading frame is the U-shaped, and the card is established on concrete wall, and is kept against with the heated board. According to the detection device for the shearing-resistant bearing capacity of the connecting piece combined insulation board, disclosed by the invention, a detection sample is placed on the base of the universal testing machine, then the universal testing machine uniformly and continuously loads the loading frame, and the loading frame applies vertical downward shearing force to the insulation board and the connecting piece until the insulation board and the connecting piece are damaged. When the load (shear force) to be loaded does not increase further within the displacement 2mm, the value is the maximum stress value. The universal testing machine records the loaded maximum stress value and records the relation curve of load and displacement in the loading process, so that the changes of the heat-insulating plate and the connecting piece in the shearing process are analyzed, the effects of the connecting piece and the heat-insulating plate on the shearing resistance of the system can be further researched, the change rule of the system under the shearing stress condition is revealed, the key control indexes are provided for the system performance, and the structure safety of the outer wall of the combined heat-insulating plate such as a precast concrete reversed heat-insulating outer wall plate system and a cast-in-place concrete composite heat-insulating template is ensured.
In one possible solution, the method further comprises: connecting a joint;
the loading frame is connected with the universal testing machine through the connecting joint.
In one possible solution, the concrete wall has the following dimensions: 400mm × 300mm × 200mm;
the size of the heat preservation plate is as follows: 400mm by 200mm by 55mm.
In one possible embodiment, the connector anchor projects into the concrete wall by a distance of 50mm to 80mm.
The embodiment of the invention also provides a method for detecting the shear bearing capacity of the connecting piece combined heat-insulation board, which comprises the following steps:
s1, preparation of a detection sample, which comprises the following steps:
s11, pouring a concrete wall;
s12, mounting a connecting piece in the middle of the heat-insulation board, fixing the heat-insulation board on the front side and the rear side of the concrete wall, centering the heat-insulation board in the height direction of the concrete wall, and arranging a plastic film between the concrete wall and the heat-insulation board;
s13, finishing maintenance of the detection sample;
s2, placing the detection sample on a base of a universal testing machine, connecting a loading frame with the universal testing machine, and enabling central lines of the detection sample, the loading frame and the universal testing machine to coincide;
and S3, continuously loading the loading frame at a constant speed by the universal testing machine, wherein the loading speed is 10 +/-1 mm/min, and recording a relation curve of the load and the displacement by the universal testing machine.
The invention has the beneficial effects that:
the invention provides a detection device and a detection method for the shearing resistance of a connecting piece combined insulation board, which can analyze the changes of an insulation board and a connecting piece in the shearing process of the combined insulation board, further can study the effect of the connecting piece and the insulation board on the shearing resistance of a system, reveal the change rule of the system under the shearing stress condition, provide a key control index for the system performance, and ensure the structural safety of the outer walls of the combined insulation boards such as a precast concrete reversed thermal insulation outer wall board system, a cast-in-place concrete composite thermal insulation template and the like. The invention can detect the shear bearing capacity between the insulation board and the concrete wall under three states of only anchoring and not sticking, only sticking and not sticking, or anchoring and composite sticking.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a detection device for detecting the shear-resistant bearing capacity of a connecting piece combined insulation board in the first embodiment of the invention;
FIG. 2 is a schematic view of a test sample according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a connector according to a first embodiment of the present invention;
FIG. 4 is a graph illustrating the relationship between load and displacement according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of the relationship between the diameter of the anchor rod of the connector and the shear load in the second embodiment of the invention.
Reference numbers in the figures:
1. detecting a sample; 11. a concrete wall; 12. a heat-insulating board; 13. a connecting member; 131. connecting the anchor rod; 132. a connector tail disc; 14. a plastic film; 2. a loading frame; 31. a base; 32. a pressing mechanism; 4. and connecting the joints.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for convenience in describing and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Like the description in the background of the application, because integration outer wall system (connecting piece combination heated board) can bear different environmental load and structural load (inoxidizing coating dead weight, seismic force) in hoist and mount, installation, operation stage, consequently need carry out the check calculation to the shearing bearing capacity of combination heated board in different stages to verify through the experiment, and then put forward the index requirement of key to the system.
The inventor of the application finds that the interlayer shear resistance of the external insulation integrated system such as a reverse-hitting wallboard and a cast-in-place wallboard is absent at present, the relevant shear resistance detection method cannot effectively detect the shear resistance bearing capacity of the combined insulation board, the shear resistance of the combined insulation board and concrete of a wallboard matching connecting piece is absent in a constraint index, the relation between the macroscopic deformation and the loading stress of the external wall external insulation integrated system (connecting piece combined insulation board) cannot be researched, and meanwhile, the influence of the connecting piece on the shear resistance of the system cannot be analyzed.
In order to solve the above problems, the inventor of the present application proposes a technical solution of the present application, and specific embodiments are as follows:
example one
Fig. 1 is a schematic view of a detection device for detecting the shear bearing capacity of a connecting piece combined insulation board in a first embodiment of the invention; fig. 2 is a schematic diagram of a test sample according to a first embodiment of the present invention, and fig. 3 is a schematic diagram of a connector according to a first embodiment of the present invention. As shown in fig. 1 to fig. 3, the detection apparatus for the shear-resistant bearing capacity of the connecting member combined heat-insulating plate of the embodiment includes: test sample 1, loading frame 2 and universal testing machine.
The test sample 1 includes: concrete wall 11, heated board 12, connecting piece 13 and plastic film 14.
The connector 13 includes: a connector anchor 131 and a connector tail disk 132.
The connecting piece 13 is of an integrated structure, and the connecting piece 13 is made of stainless steel. The connecting piece anchor rod 131 is vertically arranged on the end face of the connecting piece tail disc 132, the central axes of the connecting piece anchor rod 131 and the connecting piece tail disc 132 are overlapped, the length of the connecting piece anchor rod 131 is larger than the thickness of the heat preservation plate 12, and the diameter of the connecting piece tail disc 132 is 40mm-80mm.
The concrete wall 11 and the heat insulation board 12 are both in a cuboid shape.
The length of the heat insulation plate 12 is the same as that of the concrete wall 11 in the left-right direction, and the height of the heat insulation plate 12 in the up-down direction is smaller than that of the concrete wall 11.
The cross section of the plastic film 14 is larger than the cross section of the insulation board 12.
The insulation boards 12 are two, the two insulation boards 12 are respectively arranged on the front side face and the rear side face of the concrete wall body 11, and in the height direction, the central line of the insulation boards 12 coincides with the central line of the concrete wall body 11, namely, the insulation boards 12 are arranged in the middle in the upper and lower height direction of the concrete wall body 11.
The plastic film 14 is arranged between contact surfaces of the heat insulation plate 12 and the concrete wall 11, and the heat insulation plate 12 is separated from the concrete wall 11 by the plastic film 14, so that the heat insulation plate 12 is not in contact with the concrete wall 11.
The connecting piece anchor rods 131 of the two connecting pieces 13 are respectively arranged at the central positions of the two insulation boards 12 in a penetrating mode, the connecting piece anchor rods 131 extend out of the concrete wall 11, the connecting piece tail disc 132 is abutted to the outer side face of the insulation board 12, the connecting piece anchor rods 131 are perpendicular to the interface between the insulation board 12 and the concrete wall 11, and the connecting pieces 13 fix the insulation board 12 on the concrete wall 11.
The loading frame 2 is U-shaped, and the wall thickness of the U-shaped side wall of the loading frame 2 is larger than that of the insulation board 12.
In this embodiment, during detection, the detection sample 1 is placed on the base 31 of the universal testing machine, the U-shaped groove of the loading frame 2 is clamped at the top end of the concrete wall 11, and the loading frame 2 is not in contact with the concrete wall 11. The U-shaped side wall of the loading frame 2 is contacted and propped against the top of the heat insulation plate 2, and the central line of the detection sample 1, the central line of the loading frame 2 and the central axis of the universal testing machine are coincided with each other. The pressing mechanism 32 of the universal testing machine applies a load to the loading frame 2 in the vertical direction, and the side wall of the loading frame 2 applies a load (shearing force) to the heat insulation plate 12 and the connecting piece 13. When the load (shear force) to be loaded does not increase further within the displacement 2mm, the value is the maximum stress value. And recording the loaded maximum stress value and the corresponding relation curve of the load and the displacement by the universal testing machine. In this embodiment, the shearing force borne by the insulation board and the connecting member is the sum of the load value of the universal testing machine and the weight of the loading frame.
Certainly, in this embodiment, the heated board passes through the connecting piece to be fixed on concrete wall, and is equipped with plastic film between heated board and the concrete wall, heated board and concrete wall mutual isolation, contactless, so this embodiment detects be when only anchoring non-adhesion state between heated board and the concrete wall, the heated board with the detection of the anti-shear bearing capacity of connecting piece.
If the plastic film is not arranged between the heat insulation plate and the concrete wall body, the connecting piece is not arranged, and the heat insulation plate is directly bonded on the concrete wall body, the device can detect the detection of the shearing-resistant bearing capacity of the heat insulation plate when the heat insulation plate and the concrete wall body are only bonded and not anchored.
If a plastic film is not arranged between the heat insulation plate and the concrete wall, the heat insulation plate is directly bonded on the concrete wall, the heat insulation plate is further provided with a connecting piece, and the heat insulation plate is further fixed on the concrete wall through the connecting piece, the device can detect the detection of the shearing resistance bearing capacity of the heat insulation plate and the connecting piece when the heat insulation plate and the concrete wall are in a bonding composite anchoring state.
Through the content discovery that is not difficult, the detection device of the anti shearing bearing capacity of connecting piece combination heated board of this embodiment detects sample, loading frame and universal tester through setting up, detects the sample and includes: concrete wall, heated board, connecting piece and plastic film, two heated boards set up both sides around concrete wall respectively, and plastic film sets up between heated board and concrete wall, makes heated board and concrete wall keep apart each other, and the central point that the heated board was worn to establish by the connecting piece stock puts, fixes the heated board on concrete wall, and the loading frame is the U-shaped, and the card is established on concrete wall, and is held with heated board counterbalance. The detection apparatus for the anti shearing bearing capacity of connecting piece combination heated board of this embodiment detects the sample and places on universal tester's base, then universal tester to the even continuous loading of loading frame, the loading frame exerts vertical decurrent shearing force to heated board and connecting piece, is destroyed until heated board and connecting piece. When the load (shear force) to be loaded does not increase within a displacement of 2mm, this value is the maximum stress value. The universal testing machine records the loaded maximum stress value and records the relation curve of load and displacement in the loading process, so that the changes of the heat-insulating plate and the connecting piece in the shearing process are analyzed, the effect of the connecting piece and the heat-insulating plate on the shearing resistance of the system can be researched, the change rule of the system under the shearing stress condition is disclosed, the key control index is provided for the system performance, and the structural safety of the outer wall of the combined heat-insulating plate such as the precast concrete reverse-hit heat-insulating outer wall plate system and the cast-in-place concrete composite heat-insulating template is ensured.
Optionally, the detection apparatus for the anti-shear bearing capacity of connecting piece combination heated board in this embodiment further includes: the joint 4 is connected.
The top end of the loading frame 2 is fixedly connected with the connecting joint 4, the top end of the connecting joint 4 is fixedly connected with the pressing mechanism 32 of the universal testing machine, and the central line of the loading frame 2 and the central axis of the universal testing machine are overlapped.
In this embodiment, the loading frame passes through attach fitting and universal tester's pushing down mechanism and links to each other, and the load value that universal tester shows when pushing down, shearing force that heated board and connecting piece bore promptly, it is more convenient to use, and numerical value demonstration is more directly perceived.
Further, in the detection apparatus for the shear-resistant bearing capacity of the connection member combined insulation board in this embodiment, the size (length × height × thickness) of the concrete wall 11 is: 400mm by 300mm by 200mm.
The dimensions of the plate (length x height x thickness) are: 400mm by 200mm by 55mm.
The connector shank 131 of the connector 13 has a diameter of 8mm.
Furthermore, in the detection device for the shear-resistant bearing capacity of the connecting piece combined heat-insulating board in the embodiment, the distance from the anchor rod 13 of the connecting piece 13 to the concrete wall 11 is 50mm-80mm.
Example two
Fig. 4 is a schematic view of a relationship curve between load and displacement in the second embodiment of the present invention, and fig. 5 is a schematic view of a relationship between a connector anchor rod and a shear load in the second embodiment of the present invention.
The invention further provides a detection method for the shearing-resistant bearing capacity of the connecting piece combined heat-insulation board.
The method for detecting the shear-resistant bearing capacity of the connecting piece combined heat-insulating plate comprises the following steps:
s1, preparation of a detection sample, comprising:
s11, pouring a concrete wall.
S12, mounting a connecting piece in the middle of the heat insulation plate, fixing the heat insulation plate on the front side and the rear side of the concrete wall, centering the heat insulation plate in the height direction of the concrete wall, and arranging a plastic film between the concrete wall and the heat insulation plate;
and S13, finishing maintenance of the detection sample.
Specifically, in step S1, a plurality of (6) test samples are prepared. The concrete wall adopts vertical cast-in-place, and the size is 400mm multiplied by 300mm multiplied by 200mm. When pouring, the concrete should be vibrated to be compact, the test mould must not jump when vibrating, and the test mould must not vibrate for 5-10s or continuously until the surface is flooded.
The size of the heat insulation plates on the front side and the rear side of the concrete wall body is 400mm multiplied by 200mm multiplied by 55mm, the surface of the heat insulation plates is smooth, and the heat insulation plates have no appearance quality defects. The insulation board is arranged in the middle in the height direction of the concrete wall body and is fixed on the concrete wall body through a connecting piece. The diameter of the anchor rod of the connecting piece is 8mm, the central axis of the connecting piece, the central line of the heat-insulating plate and the central line of the concrete wall body are overlapped, and the connecting piece is perpendicular to the interface of the concrete wall body and the heat-insulating plate. A plastic film partition is arranged between the concrete wall and the heat insulation plate, so that the concrete wall and the heat insulation plate are isolated from each other and are not in contact with each other.
Then, the test sample is placed in an environment with the temperature of 20 +/-3 ℃ and the relative humidity of more than or equal to 90 percent for maintenance for more than 28 days, and then the shearing resistance bearing capacity can be detected.
S2, placing the detection sample on a base of the universal testing machine, connecting the loading frame with the universal testing machine, and enabling the central lines of the detection sample, the loading frame and the universal testing machine to coincide.
And S3, continuously loading the load at a constant speed by using a universal testing machine, wherein the loading speed is 10 +/-1 mm/min, and recording a relation curve of the load and the displacement by using the universal testing machine.
During detection, after the U-shaped side wall of the loading frame is contacted and abutted with the top surface of the insulation board, the pressing mechanism of the universal testing machine continuously applies vertical load (shearing force) to the insulation board at a constant speed until the insulation board and the connecting piece are damaged, and the loading (pressing) speed of the universal testing machine is 10 +/-1 mm/min.
When the load (shearing force) applied by the universal testing machine is not increased within the displacement range of 2mm, the value is the maximum stress (shearing force) which can be borne by the insulation board and the connecting piece. As shown in fig. 4, the universal tester records a curve of the applied load value versus displacement.
Further, in the method for detecting the shear-resistant bearing capacity of the connecting piece combined heat-insulating board in the embodiment, in step S3, the temperature of the detection environment (laboratory) is 20 ± 5 ℃.
The diameters of the anchor rods of the connectors of the samples M1, M4 and M5 in FIG. 5 are 6mm, 8mm and 10mm, respectively. As shown in fig. 5, as the diameter of the anchor rod of the connector increases, its shear bearing capacity also increases. And the heated board is at the atress in-process, and the contact position of connecting piece, the hole area increase, and the connecting piece atress is crooked simultaneously, and the metal rod piece diameter is big more, and it resists the exogenic action stronger, consequently has higher shear strength. According to the damage appearance of the detection sample, the connecting piece is bent in the stress process, and the tail disc of the connecting piece can be embedded into the insulation board to resist partial shear load, so that the shear strength of the connecting piece combined insulation board is effectively improved.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first feature and the second feature may be indirectly contacting each other through intervening media.
Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; 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; and 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.
Claims (5)
1. The utility model provides a detection apparatus for anti shearing bearing capacity of connecting piece combination heated board which characterized in that includes: detecting a sample, a loading frame and a universal testing machine:
the test sample includes: the concrete wall comprises a concrete wall body, an insulation board, a connecting piece and a plastic film;
the connector includes: a connector anchor rod and a connector tail disc;
the concrete wall and the heat insulation plate are both in a cuboid shape;
the lengths of the heat insulation plate and the concrete wall are the same, and the height of the heat insulation plate is smaller than that of the concrete wall;
the section of the plastic film is larger than that of the heat-insulation plate;
the two insulation boards are respectively arranged on the front side and the rear side of the concrete wall, and the central lines of the insulation boards and the concrete wall are superposed in the height direction;
the plastic film is arranged between the heat-insulation board and the concrete wall body, so that the heat-insulation board and the concrete wall body are mutually isolated;
the two connecting piece anchor rods respectively penetrate through the central positions of the two insulation boards and extend into the concrete wall body, the tail disc of the connecting piece is abutted against the insulation boards, and the connecting piece anchor rods are perpendicular to the interface between the insulation boards and the concrete wall body;
the loading frame is U-shaped, and the wall thickness of the loading frame is greater than that of the heat preservation plate;
the testing sample is arranged on a base of the universal testing machine, the loading frame is clamped at the top end of the concrete wall, the side wall of the loading frame abuts against the insulation board, the central line of the testing sample, the central line of the loading frame and the central axis of the universal testing machine coincide with each other, and the universal testing machine is used for loading the loading frame and recording a relation curve of load and displacement.
2. The device for detecting the shear-resistant bearing capacity of the connecting piece combined heat-insulating plate according to claim 1, further comprising: connecting a joint;
the loading frame is connected with the universal testing machine through the connecting joint.
3. The detection device for the shear-resistant bearing capacity of the connecting piece combined heat-insulating plate according to claim 2, wherein the size of the concrete wall body is as follows: 400mm × 300mm × 200mm;
the size of the heat preservation plate is as follows: 400 mm. Times.200 mm. Times.55 mm.
4. The device for detecting the shear-resistant bearing capacity of the connecting piece combined heat-insulating plate according to claim 3, wherein the distance from the anchor rod of the connecting piece to the inside of the concrete wall is 50-80 mm.
5. The method for detecting the shear-resistant bearing capacity of the connecting piece combined heat-insulating plate is characterized by comprising the following steps of:
s1, preparation of a detection sample, comprising:
s11, pouring a concrete wall;
s12, mounting a connecting piece in the middle of the heat insulation plate, fixing the heat insulation plate on the front side and the rear side of the concrete wall, centering the heat insulation plate in the height direction of the concrete wall, and arranging a plastic film between the concrete wall and the heat insulation plate;
s13, finishing maintenance of the detection sample;
s2, placing the detection sample on a base of a universal testing machine, connecting a loading frame with the universal testing machine, and enabling central lines of the detection sample, the loading frame and the universal testing machine to coincide with each other;
and S3, continuously loading the loading frame at a constant speed by the universal testing machine, wherein the loading speed is 10 +/-1 mm/min, and recording a relation curve of the load and the displacement by the universal testing machine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818554A (en) * | 2023-08-29 | 2023-09-29 | 武汉工程大学 | Shear bearing capacity contribution degree test method for pin connector |
| CN118294614A (en) * | 2024-06-05 | 2024-07-05 | 张家港保税区金港建设工程质量检测有限公司 | Construction sample check out test set |
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- 2022-12-05 CN CN202211551677.5A patent/CN115950761A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818554A (en) * | 2023-08-29 | 2023-09-29 | 武汉工程大学 | Shear bearing capacity contribution degree test method for pin connector |
| CN118294614A (en) * | 2024-06-05 | 2024-07-05 | 张家港保税区金港建设工程质量检测有限公司 | Construction sample check out test set |
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