CN210136139U - Earthquake resistance test equipment for basalt fiber reinforced composite material reinforced masonry wall - Google Patents
Earthquake resistance test equipment for basalt fiber reinforced composite material reinforced masonry wall Download PDFInfo
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- CN210136139U CN210136139U CN201920790067.8U CN201920790067U CN210136139U CN 210136139 U CN210136139 U CN 210136139U CN 201920790067 U CN201920790067 U CN 201920790067U CN 210136139 U CN210136139 U CN 210136139U
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Abstract
The utility model discloses an earthquake resistance test device for basalt fiber reinforced composite reinforced masonry wall, which comprises a plurality of test walls, wherein one test wall which is not adhered with basalt fiber cloth is used as a contrast wall, and the basalt fiber cloth is adhered on the wall surfaces of the other test walls; the top of the test wall body is provided with a vertical loading device and a transverse loading device for loading the test wall body vertically and transversely; the application end of the vertical loading device is vertically abutted to the top of the test wall body, the application end of the horizontal loading device is horizontally abutted to the top of the load end of the test wall body, a plurality of strain gauges electrically connected with the resistance strain gauge are arranged on the surface of the basalt fiber cloth, and a displacement gauge electrically connected with the resistance strain gauge is arranged at one end, far away from the load end, of the test wall body. And observing the strain state of each part of the basalt fiber cloth in the test process through the strain gauge, and detecting the deformation of the test wall body by means of a displacement meter, thereby obtaining important data such as cracking load, ultimate load, cracking displacement, maximum displacement and the like of the test wall body.
Description
Technical Field
The utility model belongs to the technical field of test equipment, especially, relate to a basalt fiber reinforced composite consolidates brickwork wall anti-seismic performance test equipment.
Background
The basalt fiber has excellent mechanical property, physical property and low price, so the basalt fiber has wide application prospect in civil engineering. The basalt fiber reinforced composite material is formed by compounding basalt fibers and resin, and the performance of the basalt fiber reinforced composite material is determined by the performance and the bonding strength of the basalt fibers and the resin. At present, basalt fiber reinforced composite materials are woven into cloth for reinforcing masonry walls, and no special test equipment is provided for researching the change rule of shear bearing capacity and deformation performance of the basalt fiber cloth reinforced masonry walls (including reinforcement before cracking, cracking and reinforcement after damage) under the action of axial force and horizontal repeated load, so that a foundation is laid for theoretical analysis and engineering application.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a basalt fiber reinforced composite material consolidates brickwork wall anti-seismic performance test equipment is provided, aim at solving the technical problem that does not have special test equipment to study the anti-shear bearing capacity and the deformability of basalt fiber cloth reinforced brickwork wall among the above-mentioned prior art.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
the test equipment for the anti-seismic performance of the basalt fiber reinforced composite reinforced masonry wall comprises a plurality of test walls fixed on the ground, wherein basalt fiber cloth is not adhered to the wall surface of one test wall to serve as a comparison wall, and basalt fiber cloth is adhered to the wall surfaces of the other test walls; the top of the test wall body is provided with a vertical loading device and a transverse loading device; the force application end of the vertical loading device is vertically abutted against the middle position of the top of the test wall body and is used for applying a vertical load to the top of the test wall body; the force application end of the transverse loading device is horizontally abutted against the top of the loading end of the test wall body and is used for applying a horizontal push-pull load to the top of the test wall body; the surface of the basalt fiber cloth is distributed with a plurality of strain gauges electrically connected with the resistance strain gauge, and one end of the test wall body, which is far away from the loading end, is provided with a displacement meter electrically connected with the resistance strain gauge.
Preferably, the test wall body comprises a bottom beam, a top beam and a wall body, the top beam is arranged at the top of the wall body, the bottom beam is arranged at the bottom of the wall body, and the bottom beam is fixed on the ground; the bottom beams and the top beams are both of reinforced concrete structures, and the top of each bottom beam and the bottom of each top beam are both provided with throwing ribs extending into the wall.
Preferably, the vertical loading device comprises a vertical hydraulic jack, a manual hydraulic pump and a reaction frame, the tail end of a piston of the vertical hydraulic jack is a force application end of the vertical loading device, the manual hydraulic pump is connected with the vertical hydraulic jack, and the reaction frame is a door-shaped frame; the top of the top beam is provided with a distribution beam, and the length of the distribution beam is consistent with that of the wall body; the cylinder body of the vertical hydraulic jack is fixed in the middle of the cross beam of the reaction frame, and the upright columns on two sides of the reaction frame are arranged on the pulley; and the tail end of the piston of the vertical hydraulic jack is abutted against the middle part of the distribution beam.
Preferably, the bottoms of the two ends of the top beam are respectively provided with a convex brim, a transverse steel beam perpendicular to the wall surface of the wall body is placed on the convex brim, the two ends of the transverse steel beam are respectively connected through steel pull rods, and the two steel pull rods are both arranged on the two sides of the top beam and are parallel to the wall surface of the wall body; the number of the transverse steel beams is two, one transverse steel beam is placed on the top beam convex brim at the loading end of the wall body, and the other transverse steel beam is placed on the top beam convex brim at the end, far away from the loading end, of the wall body; and the force application end of the transverse loading device is abutted against the middle part of the transverse steel beam at the top of the loading end of the wall body.
Preferably, the transverse loading device comprises a reaction wall and a transverse hydraulic jack, a cylinder body of the transverse hydraulic jack is fixed on the reaction wall, and the tail end of a piston of the transverse hydraulic jack is the force application end of the transverse loading device; and the tail end of a piston of the transverse hydraulic jack is abutted against the middle part of a transverse steel beam at the loading end side of the test wall body.
Preferably, load sensors are arranged on pistons of the vertical hydraulic jack and the transverse hydraulic jack.
Preferably, the basalt fiber cloth is adhered to the wall surface of the wall body in a groined shape or an X shape.
Preferably, the basalt fiber cloth is adhered to the surface of the wall body through a structural adhesive, and the outer surface of the basalt fiber cloth is coated with the structural adhesive.
Preferably, five test walls are provided, the wall surfaces of the comparison walls are not stuck with basalt fiber cloth, and the wall surfaces of the other four test walls are stuck with basalt fiber cloth; the wall bodies of the four test wall bodies are cracked, damaged and two intact wall bodies respectively, basalt fiber cloth is pasted on the wall surfaces of the two intact wall bodies in a groined shape and an X shape respectively, the basalt fiber cloth is pasted on the wall surface of the cracked wall body in an X shape, and the basalt fiber cloth is pasted on the wall surface of the damaged wall body in an X shape.
Preferably, the bottom beam is fixed on the ground through an earth anchor bolt; the wall body is built by clay bricks of MU10 and cement mortar of M10; the top beam and the bottom beam are both formed by pouring C30-grade concrete.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the utility model takes the test wall body which is not adhered with the basalt fiber cloth as a contrast wall body, the basalt fiber cloth is adhered on the wall surfaces of the other test wall bodies, and the vertical loading device and the transverse loading device are utilized to carry out vertical and transverse loading on the top of the test wall body; the strain state of each part of the basalt fiber cloth in the test process can be observed through the resistance strain gauge and the strain gauges, and the deformation of the test wall body is detected through the resistance strain gauge and the displacement gauge, so that important data such as cracking load, ultimate load, cracking displacement, maximum displacement and the like of the test wall body are accurately obtained, and a foundation is laid for theoretical analysis and engineering application.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of an earthquake resistance test device for a basalt fiber reinforced composite reinforced masonry wall provided by an embodiment of the present invention;
FIG. 2 is a loading state diagram of the middle vertical loading device of the present invention to the test wall;
FIG. 3 is a state diagram of the basalt fiber cloth of the utility model adhered to the wall in an X shape;
FIG. 4 is a diagram of the state that the basalt fiber cloth is pasted on the wall in the shape of Chinese character jing of the utility model;
in the figure: 00-basalt fiber cloth; the method comprises the following steps of 1-reaction wall, 2-transverse hydraulic jack, 3-load sensor, 4-vertical hydraulic jack, 5-distribution beam, 6-transverse steel beam, 7-steel pull rod, 8-top beam, 9-wall body, 10-ground anchor bolt, 11-bottom beam, 12-displacement meter, 13-reaction frame, 14-pulley and 15-strain gauge.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The basalt fiber reinforced composite material reinforced masonry wall anti-seismic performance test equipment shown in fig. 1 comprises a plurality of test walls fixed on the ground, basalt fiber cloth is not adhered to the wall surface of one test wall to serve as a comparison wall, and basalt fiber cloth 00 is adhered to the wall surfaces of the other test walls; the top of the test wall body is provided with a vertical loading device and a transverse loading device; the force application end of the vertical loading device is vertically abutted against the middle position of the top of the test wall body and is used for applying a vertical load to the top of the test wall body; the force application end of the transverse loading device is horizontally abutted against the top of the loading end of the test wall body and is used for applying a horizontal push-pull load to the top of the test wall body; the surface of the basalt fiber cloth 00 is provided with a plurality of strain gauges 15 electrically connected with a resistance strain gauge, and the middle part and the upper part of one end of the test wall body, which is far away from the loading end, are provided with displacement meters 12 electrically connected with the resistance strain gauge. The top of the test wall body is respectively subjected to vertical loading and horizontal loading through the vertical loading device and the horizontal loading device, the strain state of each part of the basalt fiber cloth in the test process can be observed through the resistance strain gauge and the strain gauges, and the deformation of the test wall body is detected through the resistance strain gauge and the displacement gauge, so that important data such as cracking load, ultimate load, cracking displacement and maximum displacement of the test wall body are accurately obtained.
As a preferred structure, as shown in fig. 1, the test wall comprises a bottom beam 11, a top beam 8 and a wall 9, wherein the top beam 8 is arranged at the top of the wall 9, the bottom beam 11 is arranged at the bottom of the wall 9, and the bottom beam 11 is fixed on the ground; the bottom beam 11 and the top beam 8 are both of reinforced concrete structures, the top of the bottom beam 11 and the bottom of the top beam 8 are both provided with slings extending to the inside of the wall body 9, and the slings are used for enhancing the bonding of the wall body with the surfaces of the bottom beam and the top beam, so that the reliable transmission of horizontal seismic shear force is ensured. In order to facilitate prefabrication and hoisting displacement, the top parts of the two ends of the bottom beam and the top beam are both embedded with hoisting rings, the bottom beam and the top beam can be prefabricated in advance, and then the bottom beam and the top beam are hoisted to a test site to build a wall on site.
In a specific embodiment of the present invention, as shown in fig. 1 and 2, the vertical loading device includes a vertical hydraulic jack 4, a manual hydraulic pump (not shown in the drawings), and a reaction frame 13, the end of the piston of the vertical hydraulic jack 4 is the force application end of the vertical loading device, the manual hydraulic pump is connected to the vertical hydraulic jack 4, and the reaction frame 13 is a door-shaped frame; the top of the top beam 8 is provided with a distribution beam 5, and the length of the distribution beam 5 is consistent with that of the wall 9; the cylinder body of the vertical hydraulic jack 4 is fixed in the middle of a cross beam of a reaction frame 13, and upright columns on two sides of the reaction frame 13 are arranged on a pulley 14; the tail end of the piston of the vertical hydraulic jack 4 is abutted against the middle part of the distribution beam 5. During the test, a vertical hydraulic jack is used for loading, and the loading is carried out in place once and is kept unchanged before the horizontal push-pull load is applied. In order to simulate the load transmitted by the upper structure borne by the wall body, uniformly distributed vertical loads are applied to the distribution beams on the top of the top beam. The magnitude of the vertical axial force is determined by the reading of a pressure gauge on the manual hydraulic pump. The reaction force of the vertical hydraulic jack is loaded on the jigger on the two sides of the wall body so as to ensure that the vertical load is always in the vertical direction in the test process and reduce the horizontal friction force at the piston support of the vertical hydraulic jack caused by the horizontal movement of the wall body as much as possible. The center of the vertical hydraulic jack is aligned with the axis of the distribution beam and the wall body so as to ensure that the axis of the wall body is pressed.
In a preferred embodiment of the present invention, as shown in fig. 1, the bottom of each end of the top beam 8 is provided with a convex brim, a transverse steel beam 6 perpendicular to the wall surface of the wall body 9 is placed on the convex brim, the two ends of the transverse steel beam 6 are connected with each other through steel pull rods 7, and the two steel pull rods 7 are both arranged on the two sides of the top beam 8 and parallel to the wall surface of the wall body 9; the number of the transverse steel beams 6 is two, one transverse steel beam 6 is placed on a top beam 8 convex brim at a loading end of a wall body 9, and the other transverse steel beam 6 is placed on a top beam 8 convex brim at one end, far away from the loading end, of the wall body 9; and the force application end of the transverse loading device is abutted against the middle part of the transverse steel beam 6 at the top of the loading end of the wall body 9. Horizontal loading is carried out on the transverse steel beam by utilizing the transverse loading device, and the horizontal load borne by the wall body can be simulated through the structure.
In one specific embodiment, as shown in fig. 1, the transverse loading device comprises a counterforce wall 1 and a transverse hydraulic jack 2, wherein a cylinder of the transverse hydraulic jack 2 is fixed on the counterforce wall 1, and the end of a piston of the transverse hydraulic jack 2 is a force application end of the transverse loading device; and the tail end of the piston of the transverse hydraulic jack 2 is abutted against the middle part of the transverse steel beam 6 at the loading end side of the test wall body. The horizontal repeated load borne by the test piece is realized by pushing and pulling the jack, and the pushing and pulling jack is arranged on the counter-force wall; the change rule of the shearing resistance and the deformation performance of the wall under the action of horizontal repeated load is determined through tests, and a foundation is laid for theoretical analysis and engineering application.
In order to further accurately determine the axial load and the horizontal load borne by the wall body, load sensors 3 are respectively arranged on the pistons of the vertical hydraulic jack 4 and the transverse hydraulic jack 2. The load sensor that installs on vertical hydraulic jack piston sets up in the top of distribution roof beam, and the horizontal girder steel of wall body loading end is connected with the load sensor of horizontal hydraulic jack. The magnitude of the horizontal load is measured by transmitting the load sensor to an X-Y function recorder, displacement meters are respectively arranged at the position 50mm away from the top beam and the middle of the end surface of the wall body far away from the loading end, the displacement meters are output to the X-Y function recorder through a dynamic resistance strain gauge, and a hysteretic curve of the wall body in the test process is drawn.
In the concrete reinforcing process of the wall body, the basalt fiber cloth 00 is adhered to the wall surface of the wall body 9 in a groined shape or an X shape. The width of the basalt fiber cloth is 200 or 150 mm. Meanwhile, a plurality of strain gauges are arranged on the fiber cloth at intervals, the strain state of each part of the basalt fiber cloth in the test process is observed, and strain data under various levels of loads are recorded through a DH3815n high-precision static resistance strain gauge. The strain measuring point arrangement of two typical fiber reinforced test piece walls is shown in figures 3 and 4.
In a specific embodiment of the utility model, five test walls can be designed, the wall W-1 of the wall serving as the comparison wall is not stuck with basalt fiber cloth, and the wall surfaces of the other four test walls are all stuck with basalt fiber cloth 00; the wall bodies 9 of the four test wall bodies are respectively cracked (W-4), damaged (W-5) and two intact (W-2 and W-3), the basalt fiber cloth 00 is pasted on the wall surfaces of the two intact wall bodies 9 in a groined shape and an X shape respectively, the basalt fiber cloth 00 is pasted on the wall surface of the cracked wall body 9 in an X shape, and the basalt fiber cloth 00 is pasted on the wall surface of the damaged wall body 9 in an X shape. The numbers of the wall test pieces and the reinforcing scheme are shown in table 1.
TABLE 1 test piece numbering and Reinforcement scheme
Note: all wall test pieces have the same size (b multiplied by h multiplied by t), and are 1600mm multiplied by 1100mm multiplied by 240 mm.
And secondly, the test piece W-1 is a comparative wall body and is not subjected to any reinforcement treatment.
And thirdly, the reinforcing materials of the test pieces W-2 and W-3 have the same dosage with the basalt fiber cloth, the pasting modes are different, and the influence of the basalt fiber cloth in different pasting modes on the anti-seismic performance of the masonry structure is compared with the test piece W-1.
And fourthly, the test pieces W-4 and W-5 are respectively loaded to crack and damage and then reinforced, and compared with the test piece W-1, the reinforced concrete wall is used for analyzing the shock resistance of basalt fiber cloth for reinforcing crack and damaging the masonry structure, inhibiting crack development, repairing the bearing capacity of the wall body and the like.
Compared with the test piece W-2 which is reinforced in advance, the test pieces W-5 and W-6 which are loaded to be cracked and damaged for reinforcement have the same pasting mode and using amount of the basalt fiber cloth, and the effect of the basalt fiber cloth on reinforcing newly built and existing damaged masonry structures can be compared.
Sixthly, the test pieces W-4 and W-5 can compare and analyze the effect of the basalt fiber cloth on reinforcing masonry structures with different loading degrees.
The basalt fiber cloth 00 is adhered to the surface of the wall 9 through a structural adhesive, and the outer surface of the basalt fiber cloth 00 is coated with the structural adhesive. The basalt fiber cloth pasting steps are as follows:
firstly, before pasting basalt fiber cloth, polishing the surface of a wall body by using a grinding wheel polisher in a reinforcing area to be pasted with basalt fiber cloth, removing a surface loose layer, and completely removing floating ash, wherein if a large depression exists at a brick joint of the wall body, structural glue mixed with cement is required for leveling. Because the wall body structure is built by two materials of block materials (bricks or blocks) and mortar, the surface is not very flat, and the operation is carried out in order to ensure the pasting quality of the basalt fiber cloth.
Secondly, after drying, the structural adhesive is mixed and prepared according to a specified mixing ratio (the adhesive: the curing agent is 4: l), firstly, the structural adhesive is coated once on the reinforcing area, so that the structural adhesive fully permeates the wall, and then the cut basalt fiber cloth is adhered to the reinforcing area. During pasting, the basalt fiber cloth is in full contact with the structural adhesive, and then the basalt fiber cloth is scraped and pressed by a special scraper to be smooth and compact and bubbles are expelled. And finally, uniformly coating a layer of structural adhesive on the surface of the basalt fiber cloth to fully soak the fiber cloth.
And thirdly, maintaining for one week, and performing the test after the colloid is completely cured.
The performance indexes of the basalt fiber cloth used in the test are shown in table 2:
TABLE 2 basalt fiber cloth Performance index
The performance indexes of the structural adhesive are shown in Table 3:
TABLE 3 Performance index of structural adhesives
After the basalt fiber cloth is well adhered to the surface of the wall body, a paper-based strain gauge is adhered to the basalt fiber cloth, and the technical parameters are shown in Table 4:
| model number | Specification (mm) | Resistance value (omega) | Sensitivity factor (%) |
| SZ120- |
5×120 | 120±0.2 | 2.06±1 |
TABLE 4 technical parameters of the strain gage
When the test wall is manufactured specifically, the bottom beam 11 is fixed on the ground through the ground anchor bolt 10; the wall body 9 is built by clay bricks of MU10 and cement mortar of M10; the top beam 8 and the bottom beam 11 are both formed by pouring C30 grade concrete. The height-width ratio of the wall is l: 1.45, the wall body is 240mm thick, 1600mm wide and 1100mm high; the upper part and the lower part of the wall body are respectively provided with a top beam and a bottom beam of reinforced concrete, the top beam and the bottom beam are connected with the wall body, and two holes with the middle diameter of 80 degrees are reserved at the two ends of the bottom beam and are used for fixing the wall body; the top beam is used as a cushion beam, and can ensure that the wall receives uniform vertical load. Vertical compressive stress is 0.6MPa during the experiment, for preventing that experimental wall body from taking place the lateral slip under the horizontal load effect, passes the preformed hole at floorbar both ends with the land anchor bolt before the loading, fixes experimental wall body in the geosyncline of laboratory.
When the test piece of the test wall is manufactured, the wall is built by clay bricks of MU10 and cement mortar of M10, the top beam and the bottom beam are manufactured on the construction site, and concrete is stirred by a forced mixer, vibrated in an insertion mode and naturally cured in the open air. In order to enhance the bonding of the wall body with the surfaces of the top beam and the bottom beam body and ensure the reliable transmission of horizontal earthquake shearing force, the beam body is provided with a throwing rib to prevent horizontal cracks from appearing at the mortar joint of the bottom beam during the test and influencing the normal operation of the test.
The wall body is built in a test room, and a layered flow building method is adopted to avoid the influence of material difference and construction quality during building and ensure the identity of the wall body as much as possible so as to obtain the reliability of a test result. The wall test pieces are built by the same specially-assigned person according to the requirements of 'masonry engineering construction and acceptance criteria' (54), so that each plate of mortar is uniformly used on each wall test piece to ensure the uniformity of the quality of the wall test pieces and reduce the influence of the discreteness of the strength of the wall test pieces on the test caused by the variation of the strength of the mortar and the building technology of workers as far as possible. The bricks are wet before building, the wall test piece is watered and maintained in a laboratory, and the mortar test piece is maintained under the same condition.
In the process of building the brick wall, a group of (6) cube test blocks with the thickness of 70.7mm is reserved in each mortar plate, so that the actual strength grade of the mortar is determined through a compression test; and randomly sampling the bricks required for masonry to determine the actual compressive strength rating of the bricks by a compressive test [55 ]. After the cement mortar test block is subjected to standard curing for 28 days, the average value of the compressive strength of the cement mortar test block measured by a building material test chamber pressure tester is 16.4MPa, and the average value of the actual compressive strength of the clay brick is 14.0 MPa.
The test designs 5 test wall test pieces in total, and can research the following problems:
firstly, the influence of the basalt fiber cloth on the damage form of the wall body, including various factors such as the form, distribution, position and width of cracks, is researched through comparison with an unreinforced wall body.
And secondly, researching the influence of the basalt fiber cloth on the cracking load, the shearing resistance and the bearing capacity, the rigidity and the deformation performance of the wall body by comparing with the unreinforced wall body.
And thirdly, through tests, the reinforcing effects of different reinforcing materials and different sticking modes are researched so as to find the optimal reinforcing scheme and necessary technical construction measures suitable for actual engineering.
And fourthly, researching the stress and deformation characteristics of the basalt fiber cloth for repairing the crack and damaging the wall body, and analyzing the repairing and reinforcing mechanism of the basalt fiber cloth for repairing the crack and damaging the wall body.
And fifthly, observing the whole process of the damage of each test piece, recording the P- △ hysteresis curve of each test piece, and analyzing the seismic performance of the wall.
And sixthly, on the basis of the test, searching a more reasonable calculation model and deducing a shear-resistant bearing capacity calculation formula which can be used for the actual reinforcement project.
The test was carried out according to the "procedure for building earthquake resistance test methods" (JGJ 101-96)[56]The loading method of the test piece adopts a load-deformation double-control method in the loading procedure of the test piece for the pseudo-static test. Before the test piece cracks, load control and graded loading are adopted, and the load is loaded when the test piece is close to cracking so as to reduce the grade difference; the deformation control is adopted after the test piece is cracked, the deformation value is the displacement of the test piece during cracking, and the cracking displacement is taken as the gradeThe difference is loaded.
In the test, the vertical load of the wall is added to the load once according to 0.6MPa (230KN), before the test is formally started, a horizontal load of 20kN is firstly applied, the test is repeatedly pushed and pulled twice to check the running condition of the instrument, during the formal loading, a step-by-step loading method is adopted, the load is controlled before cracking, each step is gradually increased according to 20kN, each step is circulated for 1 time, after cracking, the displacement is controlled, each step is circulated twice, and each step is added with 1 △ c (cracking displacement of the wall) until the test piece is damaged or the load is reduced to 85% of the limit load, and the test is terminated.
In addition, during the test, the loading position needs to be taken care of accurately, so that the condition that the component is twisted due to eccentricity and additional stress is generated to cause inaccuracy of test acquisition data is avoided, and the sensor and the displacement meter need to be calibrated before the test.
According to the purpose of the experimental study, the following are measured with emphasis during the experimental process:
firstly, crack morphology: and observing the deformation of the wall, the crack appearance, the crack development process and the crack width and form in the final damage process. Wherein the crack width is measured by a crack width monitor.
Secondly, strain of basalt fiber cloth: a paper-based strain gauge is attached to the basalt fiber cloth, and in the test, strain values along the longitudinal direction of the basalt fiber cloth under various levels of loads are recorded through a static resistance strain gauge.
Thirdly, load-displacement hysteresis curve: the method comprises the steps of arranging a displacement meter at the top end of a wall body, measuring the deformation of the wall body, recording and drawing a load-displacement hysteresis curve through a DH3815n static strain data acquisition device, and therefore accurately obtaining important data such as cracking load, ultimate load, cracking displacement, maximum displacement and the like of the wall body.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the one described herein, and those skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed above.
Claims (10)
1. The utility model provides a basalt fiber reinforced composite consolidates brickwork wall anti-seismic performance test equipment which characterized in that: the test wall comprises a plurality of test walls fixed on the ground, wherein basalt fiber cloth is not adhered to the wall surface of one test wall to serve as a comparison wall, and basalt fiber cloth is adhered to the wall surfaces of the other test walls; the top of the test wall body is provided with a vertical loading device and a transverse loading device; the force application end of the vertical loading device is vertically abutted against the top of the test wall body and is used for applying a vertical load to the top of the test wall body; the force application end of the transverse loading device is horizontally abutted against the top of the loading end of the test wall body and is used for applying a horizontal push-pull load to the top of the test wall body; the surface of the basalt fiber cloth is distributed with a plurality of strain gauges electrically connected with the resistance strain gauge, and one end of the test wall body, which is far away from the loading end, is provided with a displacement meter electrically connected with the resistance strain gauge.
2. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to claim 1, wherein: the test wall comprises a bottom beam, a top beam and a wall body, wherein the top beam is arranged at the top of the wall body, the bottom beam is arranged at the bottom of the wall body, and the bottom beam is fixed on the ground; the bottom beams and the top beams are both of reinforced concrete structures, and the top of each bottom beam and the bottom of each top beam are both provided with throwing ribs extending into the wall.
3. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to claim 2, wherein: the vertical loading device comprises a vertical hydraulic jack, a manual hydraulic pump and a reaction frame, wherein the tail end of a piston of the vertical hydraulic jack is a force application end of the vertical loading device, the manual hydraulic pump is connected with the vertical hydraulic jack, and the reaction frame is a door-shaped frame; the top of the top beam is provided with a distribution beam, and the length of the distribution beam is consistent with that of the wall body; the cylinder body of the vertical hydraulic jack is fixed in the middle of the cross beam of the reaction frame, and the upright columns on two sides of the reaction frame are arranged on the pulley; and the tail end of the piston of the vertical hydraulic jack is abutted against the middle part of the distribution beam.
4. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to claim 3, wherein: the bottom parts of the two ends of the top beam are respectively provided with a convex eave, a transverse steel beam perpendicular to the wall surface of the wall body is placed on the convex eave, the two ends of the transverse steel beam are respectively connected through steel pull rods, and the two steel pull rods are arranged on the two sides of the top beam and are parallel to the wall surface of the wall body; the number of the transverse steel beams is two, one transverse steel beam is placed on the top beam convex brim at the loading end of the wall body, and the other transverse steel beam is placed on the top beam convex brim at the end, far away from the loading end, of the wall body; and the force application end of the transverse loading device is abutted against the middle part of the transverse steel beam at the top of the loading end of the wall body.
5. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to claim 4, wherein: the transverse loading device comprises a reaction wall and a transverse hydraulic jack, wherein a cylinder body of the transverse hydraulic jack is fixed on the reaction wall, and the tail end of a piston of the transverse hydraulic jack is a force application end of the transverse loading device; and the tail end of a piston of the transverse hydraulic jack is abutted against the middle part of a transverse steel beam at the loading end side of the test wall body.
6. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to claim 5, wherein: and load sensors are arranged on the pistons of the vertical hydraulic jack and the transverse hydraulic jack.
7. The basalt fiber reinforced composite material reinforced masonry wall earthquake resistance test equipment according to any one of claims 2 to 6, wherein: the basalt fiber cloth is adhered to the wall surface of the wall body in a groined shape or an X shape.
8. The basalt fiber reinforced composite reinforced masonry wall earthquake resistance test equipment according to claim 7, wherein: the basalt fiber cloth is adhered to the surface of the wall body through the structural adhesive, and the outer surface of the basalt fiber cloth is coated with the structural adhesive.
9. The basalt fiber reinforced composite reinforced masonry wall earthquake resistance test equipment according to claim 8, wherein: the number of the test wall bodies is five, the wall surfaces of the comparison wall bodies are not stuck with basalt fiber cloth, and the wall surfaces of the other four test wall bodies are stuck with basalt fiber cloth; the wall bodies of the four test wall bodies are cracked, damaged and two intact wall bodies respectively, basalt fiber cloth is pasted on the wall surfaces of the two intact wall bodies in a groined shape and an X shape respectively, the basalt fiber cloth is pasted on the wall surface of the cracked wall body in an X shape, and the basalt fiber cloth is pasted on the wall surface of the damaged wall body in an X shape.
10. The basalt fiber reinforced composite reinforced masonry wall earthquake resistance test equipment according to claim 9, wherein: the bottom beam is fixed on the ground through an earth anchor bolt; the wall body is built by clay bricks of MU10 and cement mortar of M10; the top beam and the bottom beam are both formed by pouring C30-grade concrete.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855406A (en) * | 2020-07-20 | 2020-10-30 | 上海交通大学 | Portable detachable masonry structure test device |
| CN112065380A (en) * | 2020-10-20 | 2020-12-11 | 中国电建集团成都勘测设计研究院有限公司 | Large-buried-depth narrow-channel shaft electric sampling device and sampling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855406A (en) * | 2020-07-20 | 2020-10-30 | 上海交通大学 | Portable detachable masonry structure test device |
| CN112065380A (en) * | 2020-10-20 | 2020-12-11 | 中国电建集团成都勘测设计研究院有限公司 | Large-buried-depth narrow-channel shaft electric sampling device and sampling method |
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