CN217484151U - Test device for simulating influence of disturbance load on reinforced concrete - Google Patents
Test device for simulating influence of disturbance load on reinforced concrete Download PDFInfo
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- CN217484151U CN217484151U CN202220571752.3U CN202220571752U CN217484151U CN 217484151 U CN217484151 U CN 217484151U CN 202220571752 U CN202220571752 U CN 202220571752U CN 217484151 U CN217484151 U CN 217484151U
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Abstract
The utility model discloses a test device for simulating the influence of disturbance load on reinforced concrete, which comprises a vibration table, a concrete test piece and a concrete test piece supporting steel frame; the concrete test piece comprises a concrete test piece base block and a steel bar penetrating through the concrete test piece base block; placing the concrete sample base block on a vibration table; the concrete test piece supports the steelframe and is located the shaking table both sides, and the both ends of reinforcing bar are fixed in respectively on the concrete test piece supports the steelframe of both sides, the shaking table be used for providing the vibration of different frequency and amplitude. The utility model discloses can simulate disturbance load such as driving, vibration and influence reinforcing bar and concrete bonding property to easy operation, be applicable to multiple size test piece, dismouting and preparation convenience.
Description
Technical Field
The utility model relates to a building structure's technical field specifically is a test device that relates to a simulation disturbance load influences reinforced concrete.
Background
The steel bar-concrete bond slip performance has a significant impact on the working performance of the steel bar-concrete structure. Since the study of bonding performance of reinforcing steel bars and concrete is carried out by scholars at home and abroad, the split tensile strength with a single index is gradually developed to include various factors such as the strength grade of concrete, the appearance characteristic of reinforcing steel bars, the embedding length of reinforcing steel bars, the shape of reinforcing steel bar ribs, the thickness of a protective layer, the pouring position, the anchoring length and the like, but no matter experimental study or theoretical analysis, the method is currently limited to the static load condition;
in the service period of the reinforced concrete structure, besides the static load effect, the reinforced concrete structure can also be subjected to other dynamic load effects, for example, in actual engineering, the bridge structure bears the driving effect of different speeds throughout the year, and under the dynamic load effects of different frequencies and amplitudes, the internal force response and the mechanical property of the steel bars and the concrete are changed, and the bonding property between the steel bars and the concrete is influenced. Before the concrete of the reinforced bar-concrete structure reaches the designed strength, the bonding property between the concrete and the newly poured concrete structure is inevitably changed under the influence of external dynamic load, for example, in the service bridge widening project, traffic is not interrupted while the construction of the concrete structure is required to be widened, and when the newly poured concrete is still in a condensation hardening stage, bridge vibration caused by traffic load disturbs the wet joint of the new and old structure, so that the bonding property between the newly placed reinforced bar and the newly poured concrete and the bonding property of a new and old concrete joint surface are influenced. Therefore, the research on the bonding and sliding performance between the steel bar and the concrete under dynamic load disturbance is carried out, and the method not only has important theoretical significance, but also has important engineering application value.
At present, few researches on the influence of disturbance loads such as simulated travelling crane vibration on the bonding performance of the steel bar-concrete are carried out at home and abroad, and no relevant experimental research is carried out.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to above shortcoming, the utility model provides a test device of simulation disturbance load to reinforced concrete influence can simulate disturbance loads such as driving, vibration and influence reinforcing bar and concrete bonding property to easy operation, be applicable to multiple size test piece, dismouting and preparation convenience.
The technical scheme is as follows: in order to solve the problems, the utility model provides a test device for simulating the influence of disturbance load on reinforced concrete, which comprises a vibration table, a concrete test piece and a concrete test piece supporting steel frame; the concrete test piece comprises a concrete test piece base block and a steel bar penetrating through the concrete test piece base block; placing the concrete sample base block on a vibration table; the concrete test piece supporting steel frames are located on two sides of the vibrating table, two ends of the reinforcing steel bars are fixed to the concrete test piece supporting steel frames on the two sides respectively, and the vibrating table is used for providing vibration with different frequencies and amplitudes.
Furthermore, the concrete test piece supporting steel frame comprises a cross beam, vertical columns positioned on two sides of the cross beam and vertical column bases; the crossbeam set up and the both ends of crossbeam are fixed in the stand that is located the crossbeam both sides respectively along shaking table width direction, every stand is fixed in the stand base.
Furthermore, the cross beam and the upright post are made of I-shaped steel, and the end part of the cross beam is fixed on a web plate of the upright post; a web plate of the beam is provided with a plurality of first bolt holes at equal intervals; the outer surfaces of the two ends of the steel bar are provided with threads, and the two ends of the steel bar penetrate through the first bolt holes to be fixedly connected with the cross beams on the two sides of the vibrating table respectively. A plurality of holes have been seted up to equidistant beam web, can develop synchronous test to a plurality of test pieces.
Furthermore, the cross beam and the upright post are fixed through an L-shaped connecting steel plate, and the L-shaped connecting steel plate comprises a first connecting plate and a second connecting plate which is connected with the side surface of the first connecting plate and extends out of the first connecting plate in a bending manner; the first connecting plate and the second connecting plate are vertical to each other; the first connecting plate and the second connecting plate are provided with third bolt holes; positioning bolt holes are formed in the positions, close to the two ends, of the web plate of the cross beam, and a plurality of second bolt holes are formed in the web plate of the upright column at equal intervals along the vertical direction; the first connecting plate is fixedly connected with a web plate of the cross beam through the positioning bolt hole and the third bolt hole by bolts; the bolt passes through second bolt hole, third bolt hole with the web fixed connection of second connecting plate and stand. The upright column web plate is vertically provided with a plurality of holes for fixing the cross beam, and the height of the cross beam can be adjusted according to the height of the vibration table and the size of a test piece.
Furthermore, the left side and the right side of the web plate of the beam are fixedly connected with the fixed upright posts through L-shaped connecting steel plates.
Furthermore, the base of the upright column is a rectangular concrete block, and the upright column is positioned in the middle of the base.
Further, concrete test piece quantity is a plurality of, and the both ends of every concrete test piece all are fixed in on the web of crossbeam through first bolt hole.
Has the advantages that: compared with the prior art, the utility model, it is showing the advantage: 1. the disturbance on the test piece is input by the vibration table, and the influence of the driving disturbance of different speeds and different vehicle types on the bonding and sliding performance of the reinforced steel bar-concrete can be simulated by changing the vibration frequency and the amplitude of the vibration table; 2. the cross beam and the upright are made of I-shaped steel and are connected by rigid joints, the upright and the concrete base are cast into a whole, the overhanging steel bars of the test piece are fixed with the cross beam through bolts, and the device has higher rigidity and can simulate the fixed ends of the steel bars; 3. all the components are assembled into a whole by means of bolts, and the structure is simple and the assembly and disassembly are convenient.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2(a) is a front view and a cross-sectional view of a middle cross member according to the present invention; fig. 2(b) is a front view and a cross-sectional view of the center pillar of the present invention; fig. 2(C) is a front view and a top view of the L-shaped connecting steel plate of the present invention;
fig. 3 is a side view of the present invention;
fig. 4 is a top view of the present invention;
FIG. 5 is a schematic view of the connection between the L-shaped connecting steel plate and the inner sides of the cross beam and the upright post;
fig. 6 is the outside connection schematic diagram of the middle L-shaped connecting steel plate, the cross beam and the upright post.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 6, the utility model discloses a test device of simulation disturbance load to reinforced concrete influence includes two crossbeams 1, four stands 2, four upright soil bases 3, eight L type connecting steel plates 4, shaking table 5, two concrete test pieces 6.
As shown in fig. 1, 3 and 4, the two concrete samples 6 include a concrete sample base block 61 and a steel bar 62 penetrating through the concrete sample base block 61, and the concrete sample base block 61 is closely attached to the steel bar 62. The two concrete samples 6 are placed on the vibrating table 5, concrete sample supporting steel frames 7 are arranged on two sides of the vibrating table 5, and each concrete sample supporting steel frame 7 comprises a cross beam 1, two upright columns 2 and an upright column base 3 which are arranged along the width direction of the vibrating table 5; the both ends of crossbeam 1 are fixed in respectively on the stand 2 of both sides, and every stand 2 is fixed in the middle part of stand base 3, and the bottom of stand 2 flushes with 3 bottom surfaces of stand base, and 2 heels of stand pour into wholly with stand base 3. Wherein, crossbeam 1, stand 2 are the I-shaped steel, and stand base 3 is the rectangle concrete piece.
As shown in fig. 2(a), 2(b) and 2(c), first bolt holes 101 are formed in a web plate of the cross beam 1 at equal intervals, the first bolt holes 101 are vertical oblong holes, and the size of the holes can be adjusted according to the diameter of a steel bar; positioning bolt holes 102 are formed in the positions, close to the two ends, of the web plate of the cross beam 1; the web plate of the upright post 2 is provided with second bolt holes 201 at equal intervals along the vertical direction, and the second bolt holes 201 are horizontal oblong holes. The L-shaped connecting steel plate 4 includes a first connecting plate 41, and a second connecting plate 42 connected to a side surface of the first connecting plate 41 and bent and extended from the first connecting plate 41; first connecting plate 41 and second connecting plate 42 are mutually perpendicular and all are equipped with third bolt hole 401.
As shown in fig. 1, 3 and 4, the outer surfaces of both ends of each reinforcement bar 62 are threaded and both ends of the reinforcement bar 62 are respectively screwed with the cross beams 1 at both sides of the vibration table 5 through the first bolt holes 101.
As shown in fig. 5 and 6, L-shaped connecting steel plates 4 are provided at positions close to both ends of the web of the cross beam 1, and the cross beam 1 is fixed to the web of the column 2 by the L-shaped connecting steel plates 4. Specifically, bolts penetrate through the positioning bolt holes 102 and the third bolt holes 401 to fixedly connect the first connecting plate 41 with the web of the cross beam 1; bolts pass through the second bolt holes 201 and the third bolt holes 401 to fixedly connect the second connecting plate 42 with the web of the upright 2.
When the device is installed, firstly, the four upright posts 2 and the upright post base 3 are poured into a whole and are placed around the vibrating table 5; align the third bolt hole 401 of two L type steel connecting plate 4 with the positioning bolt hole 102 respectively and connect with the bolt in crossbeam 1 web both sides, later dock crossbeam 1 to stand 2 web, guarantee during the butt joint that the third bolt hole 401 of two L type steel connecting plate 4 aligns second bolt hole 201 and connects with the bolt, repeat above-mentioned step and make crossbeam 1 fix between two stands 2, install the test piece at last, align the first bolt hole 101 on crossbeam 1 web with the both ends of reinforcing bar 62, the height on the stand is fixed to the adjustment crossbeam after the reinforcing bar is worn out, make test piece 6 fall on 5 surfaces of shaking table just.
When the electromagnetic vibration table is used, the influence of the driving disturbance of different speeds, different vehicle types and the like on the bonding and sliding performance of the reinforced steel bar-concrete is simulated by changing the vibration frequency, the vibration amplitude, the vibration time and the like of the electromagnetic vibration table 5.
Claims (7)
1. A test device for simulating the influence of disturbance load on reinforced concrete comprises a vibration table (5); the device is characterized by also comprising a concrete test piece (6) and a concrete test piece supporting steel frame (7); the concrete test piece (6) comprises a concrete test piece base block (61) and a steel bar (62) penetrating through the concrete test piece base block (61); the concrete test piece base block (61) is arranged on the vibration table (5); concrete sample supports steelframe (7) and is located shaking table (5) both sides, and the both ends of reinforcing bar (62) are fixed in respectively on the concrete sample supports steelframe (7) of both sides, shaking table (5) be used for providing the vibration of different frequency and amplitude.
2. The test device for simulating the influence of disturbance load on reinforced concrete according to claim 1, wherein the concrete sample supporting steel frame (7) comprises a cross beam (1), vertical columns (2) positioned on two sides of the cross beam and vertical column bases (3); the two ends of the beam (1) are respectively fixed on the upright posts (2) at the two sides, and each upright post (2) is fixed in the upright post base (3).
3. The test device for simulating the influence of disturbance load on reinforced concrete according to claim 2, wherein the cross beam (1) and the upright post (2) are both I-shaped steel, the cross beam (1) is arranged along the width direction of the vibration table (5), and the end part of the cross beam (1) is fixed on a web plate of the upright post (2); a web plate of the cross beam (1) is provided with a plurality of first bolt holes (101) at equal intervals; the outer surfaces of two ends of the steel bar (62) are provided with threads, and two ends of the steel bar (62) penetrate through the first bolt holes (101) to be fixedly connected with the cross beams (1) on two sides of the vibration table (5) respectively.
4. The test device for simulating the influence of disturbance load on reinforced concrete according to claim 3, wherein the cross beam (1) and the upright column (2) are fixed through L-shaped connecting steel plates (4), and the L-shaped connecting steel plates (4) comprise first connecting plates (41) and second connecting plates (42) which are connected with the side surfaces of the first connecting plates (41) and extend from the first connecting plates (41) in a bending mode; the first connecting plate (41) and the second connecting plate (42) are both provided with third bolt holes (401); positioning bolt holes (102) are formed in the positions, close to the two ends, of the web plate of the cross beam (1), and a plurality of second bolt holes (201) are formed in the web plate of the upright post (2) at equal intervals along the vertical direction; the first connecting plate (41) is fixedly connected with a web plate of the cross beam (1) through a positioning bolt hole (102) and a third bolt hole (401) by bolts; the second connecting plate (42) and the web plate of the upright post (2) are fixedly connected through the second bolt hole (201) and the third bolt hole (401) by bolts.
5. The test device for simulating the influence of disturbance load on reinforced concrete according to claim 4, wherein the left side and the right side of the web plate of the cross beam (1) are fixedly connected with the fixed upright posts (2) through L-shaped connecting steel plates (4).
6. A test device for simulating the effect of disturbance load on reinforced concrete according to claim 2, characterized in that the column base (3) is a rectangular concrete block, and the column (2) is located in the middle of the base (3).
7. The test device for simulating the influence of disturbance load on reinforced concrete according to claim 3, wherein the number of the concrete samples (6) is several, and both ends of each concrete sample (6) are fixed on the web plate of the cross beam (1) through the first bolt holes (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220571752.3U CN217484151U (en) | 2022-03-16 | 2022-03-16 | Test device for simulating influence of disturbance load on reinforced concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220571752.3U CN217484151U (en) | 2022-03-16 | 2022-03-16 | Test device for simulating influence of disturbance load on reinforced concrete |
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| CN217484151U true CN217484151U (en) | 2022-09-23 |
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| CN202220571752.3U Active CN217484151U (en) | 2022-03-16 | 2022-03-16 | Test device for simulating influence of disturbance load on reinforced concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541856A (en) * | 2022-10-19 | 2022-12-30 | 重庆交通大学 | Test device for simulating concrete disturbance of joint of spliced wide bridge |
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2022
- 2022-03-16 CN CN202220571752.3U patent/CN217484151U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541856A (en) * | 2022-10-19 | 2022-12-30 | 重庆交通大学 | Test device for simulating concrete disturbance of joint of spliced wide bridge |
| CN115541856B (en) * | 2022-10-19 | 2023-09-22 | 重庆交通大学 | Test device for simulating concrete disturbance of spliced wide bridge joint |
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