CN211652736U - Fixed end force transmission device for concrete slab fire test under different boundary conditions - Google Patents
Fixed end force transmission device for concrete slab fire test under different boundary conditions Download PDFInfo
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- CN211652736U CN211652736U CN202020178522.1U CN202020178522U CN211652736U CN 211652736 U CN211652736 U CN 211652736U CN 202020178522 U CN202020178522 U CN 202020178522U CN 211652736 U CN211652736 U CN 211652736U
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Abstract
The utility model provides a fixed end force transfer device for a fire test of a concrete slab under different boundary conditions, which comprises an I-shaped steel (1), a full-thread bolt (2), a combined steel column (3), a jack (4), a distribution steel beam (5), a hinged support (6) and a counterforce steel frame (7); the I-shaped steel (1) and the combined steel column (3) are assembled through the full-thread bolt (2) and are mounted on the counterforce steel frame (7) and used for bearing vertical load; the distribution steel beam (5) is placed between the hinged support (6) and the jack (4) and used for distributing the vertical counter force of the jack (4) and performing secondary distribution of concentrated load through the hinged support (6). The utility model discloses a test process provides concrete slab fire test's under the different boundary conditions solid end force transfer device, can realize solid end boundary condition with the counter-force through independently designing the device.
Description
Technical Field
The utility model relates to a beam slab structure fire test technical field especially relates to the force transfer device who forms solid end boundary condition.
Background
The concrete slab is used as an important horizontal bearing member, and the research on the fire performance of the concrete slab under different boundary working conditions has important significance. The research on the structural performance of the beam slab needs to simulate a test environment according to the actual engineering working conditions, and the solid end boundary condition in the actual working conditions is generally difficult to be reduced and realized in the test process in a real sense, so that the solid end boundary condition is reduced to the maximum extent in the test, which is an important problem to be solved.
The force transmission device forming the solid end boundary is an important content for solving the problem of boundary conditions in the test process. The utility model discloses the application utilizes the force transfer device of autonomic design, utilizes the counter-force steelframe, and the secondary distribution of load is concentrated in the simulation, concentrates the load distribution for the multiple spot and concentrates the load with a single, and then the simulation equipartition load is arranged, forms the solid end boundary condition under the laboratory environment, provides a new solid end loading selected mode for the component test.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide concrete slab fire test's solid end force transfer device under the different boundary conditions for the test process, can realize solid end boundary conditions with the counter-force through independently designing the device.
In order to realize the purpose, the utility model discloses a technical scheme is:
a fixed-end force transmission device for a concrete slab fire test under different boundary conditions comprises I-shaped steel, full-thread bolts, a combined steel column, a jack, a distribution steel beam, a hinged support and a counterforce steel frame; the I-shaped steel and the combined steel column are assembled through the full-thread bolt and are installed on the counterforce steel frame to bear vertical load; the distribution steel beam is placed between the hinged support and the jack and used for distributing the vertical counter force of the jack and carrying out secondary distribution of concentrated load through the hinged support.
In a preferred embodiment: the I-shaped steel is arranged on the counterforce steel frame by using a full-thread bolt; and rectangular steel plates with equal cross sections are welded at the left end and the right end of the I-shaped steel.
In a preferred embodiment: and the combined steel column and the I-shaped steel are assembled and combined through the reserved holes by using the full-thread bolts.
In a preferred embodiment: the combined steel column is composed of four angle steels and two steel plates, and small-size angle steels are welded on the sections of the angle steel columns and used as stiffening ribs.
In a preferred embodiment: the distribution steel beams are placed on the hinged supports to distribute the counter force generated by the device for the second time, and the number of transmission paths is determined by the number of the hinged supports.
The utility model has the advantages and positive effects that: the force transmission device which is easy to process, assemble and operate and used for laboratories and forms the boundary condition of the fixed end is manufactured by simple steel structure materials. Through the assembly of I-steel and combination steel column, can extend counter-force steel frame roof beam mutually, avoid the wasting of resources. The load size and the path transmission are realized by distributing the steel beams and the hinged supports, the loading action points can be determined according to the number of the hinged supports, and the uniform load distribution is replaced by multi-point concentrated load distribution in a laboratory environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 an embodiment of a fixed end force transfer device for a fire test of a concrete slab under different boundary conditions according to the present invention;
fig. 2 is a schematic elevation view of a fixed end force transfer device according to the present invention;
the reference numerals are explained below:
1. i-shaped steel; 2. a full-thread bolt; 3. combining steel columns; 4. a jack; 5. distributing the steel beams; 6. a hinged support; 7. and (5) a counterforce steel frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the whole anchoring of the counterforce steel frame 7 in the present invention is on the ground, and the rigidity is considered to be infinite in the test environment.
Referring to fig. 2, the solid end force transfer device for the fire test of the concrete slab under different boundary conditions of the present invention comprises an i-steel 1, a full thread bolt 2, a combined steel column 3, a jack 4, a distribution steel beam 5 and a hinged support 6. The I-shaped steel 1, the full-thread bolt 2 and the combined steel column 3 form a stress device; the distribution beam 5 and the hinged support 6 form a force transmission device; the jack 4 is a loading device. The I-shaped steel 1 and the combined steel column 3 are assembled through the full-thread bolt 2 and are mounted on the counterforce steel frame 7 and are used for bearing vertical load; the distribution steel beam 5 is placed between the hinged support 6 and the jack 4 and used for distributing the vertical counter force of the jack 4 and performing secondary distribution of concentrated loads through the hinged support 6.
In one embodiment of the utility model, rectangular steel plates with equal area are respectively welded on the left and right cross sections of the I-shaped steel 1, and reserved holes are arranged; the specific dimensions in practical application are adjusted according to the experimental environment, and the embodiment is only referred to.
In one embodiment of the utility model, the combined steel column 3 is formed by welding angle steel and steel plates, and the strength of the combined steel column is improved by using small-size angle steel as a stiffening rib; the specific dimensions in practical application are adjusted according to the experimental environment, and the embodiment is only referred to.
In one embodiment of the present invention, the distribution steel beam 5 is formed by butt welding two equal-section channel steels; the specific dimensions in practical application are adjusted according to the experimental environment, and the embodiment is only referred to.
In one embodiment of the utility model, the hinged support 6 is formed by welding a steel plate and two small steel pipes and is provided with a roller with corresponding size; the specific dimensions in practical application are adjusted according to the experimental environment, and the embodiment is only referred to.
The utility model discloses an in the embodiment, draw appearance control jack load through the stock that has digital display, combine the utility model relates to a solid end power transmission device distributes the concentrated load of three jack for the six load to concrete slab, has accomplished the equipartition load simulation to solid end boundary condition requirement.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention, as long as they are in accordance with the technical spirit of the present invention.
Claims (5)
1. Solid end force transfer device of concrete slab fire test under different boundary conditions, its characterized in that: the steel column comprises I-shaped steel (1), full-thread bolts (2), combined steel columns (3), jacks (4), distribution steel beams (5), hinged supports (6) and reaction steel frames (7); the I-shaped steel (1) and the combined steel column (3) are assembled through the full-thread bolt (2) and are mounted on the counterforce steel frame (7) and used for bearing vertical load; the distribution steel beam (5) is placed between the hinged support (6) and the jack (4) and used for distributing the vertical counter force of the jack (4) and performing secondary distribution of concentrated load through the hinged support (6).
2. A fixed end force transfer device according to claim 1, wherein: the I-shaped steel (1) is arranged on the counterforce steel frame (7) by using a full-thread bolt (2); rectangular steel plates with equal cross sections are welded at the left end and the right end of the I-shaped steel (1).
3. A fixed end force transfer device according to claim 1, wherein: the combined steel column (3) and the I-shaped steel (1) are assembled and combined through reserved holes by full-thread bolts (2).
4. A fixed end force transfer device according to claim 1, wherein: the combined steel column (3) is composed of four angle steels and two steel plates, and small-size angle steels are welded on the sections of the angle steel columns and used as stiffening ribs.
5. A fixed end force transfer device according to claim 1, wherein: the distribution steel beams (5) are placed on the hinged supports (6) to distribute the reaction force generated by the device for the second time, and the number of transmission paths is determined by the number of the hinged supports (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020178522.1U CN211652736U (en) | 2020-02-17 | 2020-02-17 | Fixed end force transmission device for concrete slab fire test under different boundary conditions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020178522.1U CN211652736U (en) | 2020-02-17 | 2020-02-17 | Fixed end force transmission device for concrete slab fire test under different boundary conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141867A (en) * | 2020-02-17 | 2020-05-12 | 华侨大学 | Solid end force transmission device for concrete slab fire test under different boundary conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141867A (en) * | 2020-02-17 | 2020-05-12 | 华侨大学 | Solid end force transmission device for concrete slab fire test under different boundary conditions |
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