CN107130721B - Anti die-cut concrete rectangle column slab node and concrete slab node - Google Patents
Anti die-cut concrete rectangle column slab node and concrete slab node Download PDFInfo
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- CN107130721B CN107130721B CN201710559716.9A CN201710559716A CN107130721B CN 107130721 B CN107130721 B CN 107130721B CN 201710559716 A CN201710559716 A CN 201710559716A CN 107130721 B CN107130721 B CN 107130721B
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- 239000004567 concrete Substances 0.000 title claims abstract description 98
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 226
- 239000010959 steel Substances 0.000 claims abstract description 226
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000009415 formwork Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003993 interaction Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229920002582 Polyethylene Glycol 600 Polymers 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
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Abstract
The invention relates to the field of constructional engineering, in particular to an anti-shear concrete rectangular column plate node and a concrete plate node; the concrete slab node consists of an anti-cutting concrete rectangular column slab node and a concrete floor slab arranged on the anti-cutting concrete rectangular column slab node, wherein the anti-cutting concrete rectangular column slab node comprises a rectangular concrete column and a section steel structure, the section steel structure comprises a section steel column, four steel plates and four annular steel plates, every two adjacent steel plates are connected with one annular steel plate, the section steel column comprises a first web plate and a second web plate, the first web plate and the second web plate are arranged in a crossed manner, flanges are arranged at two ends of the first web plate and two ends of the second web plate, and each flange is connected with one steel plate; the rectangular concrete column is connected to the section steel column; the slab joint can increase the contact area in a floor slab and reduce the stress concentration phenomenon; under the effect of punching load, the first profile steel module is extruded with the interaction mode between the floor slab, and the bearing capacity of concrete can be improved.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to an anti-shear concrete rectangular column plate node and a concrete plate node.
Background
The steel reinforced concrete structure has the advantages of a steel structure and a concrete structure, has higher bearing capacity and rigidity, good earthquake ductility and energy consumption capacity, and is suitable for popularization and application in high-rise buildings and large-span heavy load structures. With the development of commercial high-rise buildings such as houses, offices and the like, people urgently need higher building indoor clearance to meet the requirements of vision, building functions, fire fighting functions, traditional building geomantic omen and the like, so that a flat slab system can be produced at the same time. The slab-column structure is used as a type of flat slab system, and the good integrity, the wide building space and the considerable economic benefit of the slab-column structure are more and more concerned by people. However, when such a structure is subjected to a strong earthquake action, the additional stress caused by unbalanced bending moment can produce an amplification effect at the periphery of the column, and when the shear stress is too large and an effective shearing resisting measure is lacked, the punching damage at the joint of the plate column is very likely to occur, and the continuous collapse of the structure is even caused. Compared with a beam-plate-column structure system, the existence of the beam can effectively adjust the bending moment and the shearing force at the node, and meanwhile, certain rigid constraint is provided for the node. Therefore, the seismic performance of the slab-column joint is inferior to that of the beam-slab-column joint. In fact, the anti-shear problem of the plate column joint is a weak link in the whole system. In general, extending the contact area between the posts and the plates by placing caps or attaching pallets on top of the posts can be used to mitigate the post-to-plate punching action, but in most cases it is not appropriate to place caps or pallets, which are unsightly, for example in apartment buildings. In addition, the cap or pallet also causes inconvenience to the binding of the reinforcing bars and the formwork. Therefore, in the prior art, a method of configuring a bent reinforcing bar is mostly adopted to solve the anti-cutting problem of a plate column node in a plate column structure.
The structural form of the steel reinforced concrete column-plate structure is taken as a branch of a steel reinforced concrete structure, the requirements of a vertical bending member on the bearing capacity and the anti-seismic performance of a high-rise building structure can be well met, and meanwhile, the structural form of a flat slab can also ensure the effective exertion of the building functions. Therefore, the steel concrete column-plate structure can be used as a preferred form of a high-rise large bay structure. Considering that more section steel is arranged in the section steel concrete column, and the section steel in the conventional steel distribution mode has a longer flange and is arranged in parallel with the column edge, the bent steel bar is difficult to penetrate into the column by adopting a conventional means, so that the search for an anti-cutting part which is simple in structure, convenient to construct and reasonable in force transmission is particularly necessary.
Disclosure of Invention
The invention aims to provide an anti-cutting concrete rectangular column plate node which can increase the contact area with a floor slab and reduce the stress concentration phenomenon; but also can improve the bearing capacity, increase the tie effect and the like.
Another object of the present invention is to provide a concrete slab node which has a simple structure, is convenient and fast to construct, has a low cost, has a reasonable force transmission, and can enhance the anti-shear capability between a concrete floor slab and an anti-shear concrete rectangular column slab node.
The embodiment of the invention is realized by the following steps:
the anti-cutting concrete rectangular column plate node comprises a rectangular concrete column and a section steel structure, wherein the section steel structure comprises a section steel column, four steel plates and four annular steel plates, every two adjacent steel plates are connected with one annular steel plate, the section steel column comprises a first web plate and a second web plate, the first web plate and the second web plate are arranged in a crossed mode, flanges are arranged at two ends of the first web plate and two ends of the second web plate, and each flange is connected with one steel plate; the rectangular concrete column is connected to the section steel column.
In a preferred embodiment of the present invention, the steel plates include a first steel plate and a second steel plate, the annular steel plate connects two adjacent first steel plates, the second steel plate connects the side walls of the first steel plates facing the height direction of the section steel column, and the cross sections of the steel plates form a "T" shape.
In a preferred embodiment of the invention, at least one peg is provided along the length of the second steel plate.
In a preferred embodiment of the present invention, a stiffening rib is disposed at a connection portion of the first steel plate and the flange, and the stiffening rib is disposed on a side of the first steel plate away from the second steel plate.
In a preferred embodiment of the present invention, a formwork space is reserved between one side of the annular steel plate close to the section steel column and the section steel column.
In a preferred embodiment of the present invention, the width of the flange is greater than or equal to the width of the steel plate.
In a preferred embodiment of the present invention, the first web is perpendicular to the second web.
In the preferred embodiment of the invention, the oppositely disposed flanges are parallel to each other.
In a preferred embodiment of the present invention, two parallel flanges are sandwiched between two parallel sides of the rectangular concrete column.
A concrete slab node comprising a concrete floor slab and the cut-resistant concrete rectangular column slab node of any one of claims 1-9, the concrete slab being connected to a steel plate.
The anti-erosion concrete rectangular column plate node and the concrete slab node of the embodiment of the invention have the beneficial effects that: after the steel plate spliced by the annular steel plates is connected with the profile steel structure, the contact area of the column in the floor slab is equivalently expanded, and the stress concentration phenomenon is reduced; the steel plate spliced by the annular steel plates is extruded with the floor slab in an interaction mode under the action of punching load, so that the characteristic of good bearing capacity of concrete is well exerted; the method has the advantages that the trouble that the bent steel bar needs to pass through the web plate in the section steel concrete special-shaped column is avoided only through simple structural measures such as welding, steel plate extension and the like, meanwhile, the method is more definite in stress relative to the bent steel bar, and the advantages of the mechanical property of the material can be fully played.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a concrete slab node according to a first embodiment of the present invention;
FIG. 2 is a first structural schematic view of a section steel structure according to a first embodiment of the present invention;
FIG. 3 is a second structural schematic view of a section steel structure according to a first embodiment of the present invention;
fig. 4 is a schematic structural view of a concrete slab node according to a second embodiment of the present invention;
FIG. 5 is a schematic structural view of a section steel structure according to a second embodiment of the present invention.
Icon: 10 a-a concrete slab node; 10 b-a concrete slab node; 100-anti-erosion cutting concrete rectangular column plate node; 200-section steel structure; 300 a-section steel column; 300 b-section steel column; 310-a first web; 320-a second web; 330 a-flange; 330 b-flanges; 400 a-steel plate; 400 b-steel plate; 500-ring-shaped steel plate; 410 a-a first steel plate; 410 b-a first steel plate; 420 a-a second steel plate; 420 b-a second steel plate; 600-studs; 700-a stiffener; 800-connecting plate; 810-rectangular concrete columns; 820-concrete floor.
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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "vertical", "inner", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged in use of products of the present invention, which are merely for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected," unless otherwise explicitly specified or limited, are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, the present embodiment provides a concrete slab node 10a, which includes a concrete slab 820 and an anti-cut concrete rectangular column slab node 100, wherein the concrete slab 820 is connected to the anti-cut concrete rectangular column slab node 100.
The anti-punching concrete rectangular column plate node 100 comprises a rectangular concrete column 810 and a profile steel structure 200, wherein the rectangular concrete column 810 is connected to the profile steel structure 200, specifically, one rectangular concrete column 810 can be arranged at one end or two ends of the profile steel structure 200, and the rectangular concrete column 810 is arranged at one end in the embodiment.
Specifically, referring to fig. 2, the section steel structure 200 includes a section steel column 300a, four steel plates 400a, and four annular steel plates 500, wherein one annular steel plate 500 is connected between two adjacent steel plates 400 a; the section steel column 300a includes a first web 310 and a second web 320, the first web 310 and the second web 320 are arranged in an intersecting manner, the intersecting position may be the middle of the first web 310 and the second web 320, flanges 330a are arranged at both ends of the first web 310 and the second web 320, and one flange 330a is connected to one steel plate 400 a. The number of the steel plates 400a is 4 and the number of the ring-shaped steel plates 500 is 4 in this embodiment, but not limited thereto, and the number of the steel plates 400a and the ring-shaped steel plates 500 may be 2 in other embodiments.
Further, the first web 310 and the second web 320 may be vertically crossed, that is, the included angle at the connection position of the first web 310 and the second web 320 is 90 °, and the section center of the section steel column 300a is in a cross shape. Flanges 330a at two ends of the first web 310 and the second web 320 are perpendicular to the first web 310 and the second web 320, respectively, and thus it can be known that the flanges 330a at two ends of the first web 310 are arranged in parallel, and similarly, the flanges 330a at two ends of the second web 320 are also arranged in parallel. The section steel column 300a may be welded from steel plates of corresponding specifications, and the specific shape of the section thereof may be a cross with a flange 330 a.
The rectangular concrete column 810 is a concrete column with a rectangular cross section, and the flanges 330a disposed at the two ends of the first web 310 and the second web 320 are parallel to the corresponding sides of the rectangular concrete column 810, i.e., the four flanges 330a are parallel to the sides of the rectangular concrete column 810.
The steel plate 400a includes a first steel plate 410a and a second steel plate 420a, the annular steel plate 500 connects the adjacent first steel plates 410a, the second steel plate 420a is connected to the first steel plate 410a on a plane facing the height direction of the section bar 300a, and preferably, the second steel plate 420a is disposed perpendicular to the first steel plate 410a, that is, the section of the steel plate 400a composed of the first steel plate 410a and the second steel plate 420a is T-shaped; the steel plate 400a may be formed by welding the first steel plate 410a and the second steel plate 420a to form a T-shape, or may be formed by cutting H-shaped steel. The width of the first steel plate 410a may be less than or equal to the width of the flange 330a, so as to ensure the pouring quality of the slab node concrete. The connection between the T-shaped steel plate 400a and the flange 330a may be welding, but is not limited thereto, and may be other connection methods such as bolting.
At least one peg 600 is disposed along the length direction of the second steel plate 420a, and the number of pegs 600 on each second steel plate 420a is 9 in this embodiment, but not limited thereto, and the number of pegs 600 may also be 5, 6, 12, etc. in other embodiments. The predetermined studs 600 may strengthen the connection between the steel structure 200 and the concrete floor.
Referring to fig. 3, a stiffener 700 (a triangular steel block) is further disposed at a connection portion between the first steel plate 410a and the flange 330a, and the stiffener 700 is disposed on a side of the first steel plate 410a away from the second steel plate 420a to enhance reliable connection between the steel plate 400a and the central section steel column 300 a; the joint between the first steel plate 410a and the flange 330a refers to a right angle at which the first steel plate 410a and the flange 330a are joined. It should be noted that the number of the stiffening ribs 700 disposed below each first steel plate 410a may be 1, 2, 3, and the like, which is not limited herein, and the number of the stiffening ribs 700 below each first steel plate 410a is 2 in this embodiment.
The annular steel plate 500 may be a circular arc steel plate, and in this embodiment, the circular arc annular steel plate 500 may be welded to the first steel plate 410a, but the present invention is not limited thereto, and in other embodiments, the circular arc annular steel plate 500 may also be a steel plate having another shape such as a triangle.
Referring to fig. 2, the thickness of the circular arc-shaped ring-shaped steel plate 500 is the same as that of the first steel plate 410a, and the thickness refers to the thickness of the first steel plate 410a in the axial direction of the steel structure 200 when the steel structure 200 is vertically placed.
The adjacent steel plates 400a are connected by circular arc-shaped annular steel plates 500 to form a space steel structure node system, the annular steel plates 500 surround corners of the section steel column 300a, and the annular steel plates 500 reserve the thickness of the formwork at the corners to ensure formwork supporting space. The width of the annular structure formed by connecting the annular steel plate 500 and the steel plate 400a may be one to two times of the width of the first web 310 or the second web 320 of the section steel column 300a, and the widths of the first web 310 and the second web 320 refer to: the distance between the flanges 330a at both ends of the first web 310 or the distance between the flanges 330a at both ends of the second web 320.
Further, the distance from the outer side wall of the circular steel plate 500 to the center of the section steel column 300a is 1 to 1.5 times greater than the distance from the inner side wall to the center of the section steel column 300a, that is, the outer diameter of the circular steel plate 500 is 1 to 1.5 times longer than the inner diameter of the circular steel plate 820, and the thickness of the concrete floor 820 is the thickness of the section steel column 300a in the axial direction. Still further, the diameter of the annular space enclosed between the annular steel plate 500 and the steel plate 400a is larger than the width of the rectangular concrete column 810 in the horizontal plane.
The concrete floor 820 is connected to the steel plate 400a, and the lower surface of the concrete floor 820 and the lower surface of the first steel plate 410a can be arranged on the same horizontal plane (kept flush), and the second steel plate 420a is embedded inside the concrete floor 820, i.e. the steel plate 400a is arranged inside the concrete floor 820 in an inverted T-shaped state; the arrangement mode aims to exert the bearing capacity of the concrete to the maximum extent, namely the concrete floor 820 is directly supported on the column, the bearing action of the T-shaped steel plates 400a spliced by the circular steel plates 500 after the load is transmitted to the column from the floor is used for effectively delaying the punching action, and the steel plates 400a spliced by the circular steel plates 500 have the tendency of mutual extrusion under the punching load action of the concrete floor 820. Specifically, the height of the section of the steel plate 400a in the height direction thereof is not more than half the thickness of the concrete floor 820, so as to ensure a concealing effect of laying pipes and the like in the plate.
It should be noted that, if the stressed steel bars at the bottom of the concrete floor 820 need to be disposed on the steel plate 400a, the stressed steel bars may be cut off and welded to the second steel plate 420a of the steel plate 400a, or the stressed steel bars may be disposed in the holes after the holes are formed in the second steel plate 420a of the steel plate 400 a.
It should be further noted that the shape of the concrete floor 820 may be a square, but is not limited thereto, and in other embodiments, the shape may be other shapes such as a circle.
The beneficial effects of the concrete slab node 10a are: the concrete slab node 10a is connected with a steel plate 400a with a T-shaped section, a reinforced steel column 300a and a concrete floor 820 which are spliced by circular arc-shaped annular steel plates 500, and the anti-cutting capacity between an anti-cutting concrete rectangular column plate node 100 and the concrete floor 820 can be enhanced on the basis of not changing the original design structure of the plate column node; meanwhile, no matter the steel is designed and manufactured or constructed on a formwork, the T-shaped steel plate 400a spliced by the circular arc-shaped annular steel plate 500 and the section steel column 300a are very simple to connect, and the characteristic of good bearing capacity of concrete can be exerted to the greatest extent; the concrete slab node 10a may be applied to a center pillar node of a steel reinforced concrete frame flat slab system.
Example two
Referring to fig. 4, the present embodiment provides a concrete slab node 10b having a similar structure to the concrete slab node 10a provided in the first embodiment, and the first embodiment is the same in that the steel plates 400b are connected to the flanges 330b of the section steel columns 300b through connection plates 800 instead of welding, as follows.
One end of the steel plate 400b is welded to the connection plate 800, and the connection plate 800 is detachably connected to the flange 330b of the section steel column 300 b. The detachable connection may be a connection of the steel plate 400b to the section bar 300b by bolts or the like. The steel plates 400b are detachably connected, so that partial assembly type assembly of a combined structure can be realized, the construction progress is accelerated, and the quality of welding seams at the joints of the steel plates 400b is ensured, so that the requirements of building industrialization technology are met.
Please refer to fig. 5, the stiffening rib 700 in the present embodiment may be disposed at the welding position of the first steel plate 410b and the connecting plate 800, and specifically, may be disposed on a side of the first steel plate 410b away from the second steel plate 420 b. The stiffener 700 may make the connection of the steel plate 400b and the connection plate 800 more stable. It should be further noted that the number of the stiffening ribs 700 disposed below each first steel plate 410b may be 1, 2, 3, etc., and is not limited herein, and the number of the stiffening ribs 700 below each first steel plate 410b is 2 in this embodiment.
The beneficial effects of the concrete slab node 10b are: the concrete slab node 10b can enhance the anti-cutting ability of the column and the floor slab, and exert the characteristic of good bearing capacity of concrete, and can also realize partial assembly type assembly of a combined structure, accelerate the construction progress and ensure the quality of welding seams at the joint of the steel plate 400b so as to meet the requirements of the building industrialization technology.
In conclusion, the anti-cutting concrete rectangular column plate node and the concrete slab node have the beneficial effects that:
(1) after the steel plate spliced by the annular steel plates is connected with the profile steel structure, the contact area of the column in the floor slab is equivalently expanded, and the stress concentration phenomenon is reduced;
(2) the steel plate spliced by the annular steel plates is extruded with the floor slab in an interaction mode under the action of punching load, so that the characteristic of good bearing capacity of concrete is well exerted;
(3) the stud arranged on the steel plate can enhance the connection between the steel plate and the concrete floor and increase the tie effect;
(4) the method has the advantages that the trouble that the bent steel bar needs to pass through a web plate in the section steel concrete special-shaped column is avoided only through simple structural measures such as welding, steel plate extension and the like, meanwhile, the method is more definite in stress relative to the bent steel bar, and the advantages of mechanical properties of materials can be fully played.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The anti-cutting concrete rectangular column plate node is characterized by comprising a rectangular concrete column and a profile steel structure, wherein the profile steel structure comprises a section steel column, four steel plates and four annular steel plates, every two adjacent steel plates are connected with one annular steel plate, the section steel column comprises a first web plate and a second web plate, the first web plate and the second web plate are arranged in a crossed mode, flanges are arranged at two ends of the first web plate and two ends of the second web plate, and each flange is connected with one steel plate; the rectangular concrete column is connected to the section steel column;
the steel plates comprise first steel plates and second steel plates, the annular steel plates are connected with two adjacent first steel plates, the second steel plates are connected with the side walls of the first steel plates facing the height direction of the section steel column, and the sections of the steel plates form a T shape;
at least one stud is arranged along the length direction of the second steel plate;
the width of the flange is larger than that of the steel plate;
the flanges which are oppositely arranged are parallel;
two parallel flanges are clamped between two mutually parallel sides of the rectangular concrete column.
2. The cut-resistant concrete rectangular column plate node of claim 1, wherein a stiffening rib is provided at the junction of the first steel plate and the flange, and the stiffening rib is provided on the side of the first steel plate away from the second steel plate.
3. The cut-resistant concrete rectangular column panel node of claim 1, wherein a formwork space is reserved between a side of the annular steel plate adjacent to the section steel column and the section steel column.
4. The cut-resistant concrete rectangular column panel node of claim 1, wherein the first web is perpendicular to the second web.
5. A concrete slab node comprising a concrete floor slab and the cut-resistant concrete rectangular column slab node of any of claims 1-4, said concrete slab being connected to said steel plates.
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| CN201710559716.9A CN107130721B (en) | 2017-07-10 | 2017-07-10 | Anti die-cut concrete rectangle column slab node and concrete slab node |
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| CN201710559716.9A CN107130721B (en) | 2017-07-10 | 2017-07-10 | Anti die-cut concrete rectangle column slab node and concrete slab node |
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| CN110424548B (en) * | 2019-08-28 | 2023-12-29 | 华侨大学 | Steel pipe concrete column-beamless floor connecting node and construction method thereof |
| CN110747895A (en) * | 2019-10-12 | 2020-02-04 | 上海建工五建集团有限公司 | Detachable steel structure column cap used in reverse construction method and cross section size calculation method thereof |
| CN112900718B (en) * | 2021-01-19 | 2022-06-14 | 同济大学 | Beamless floor system node structure suitable for steel tube or steel tube concrete column |
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| CN206941927U (en) * | 2017-07-10 | 2018-01-30 | 南京工业大学 | Anti die-cut concrete rectangle column slab node and concrete slab node |
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