CN217679644U - Structure for solving deletion of shear key under steel column by utilizing rear-mounted shear key - Google Patents
Structure for solving deletion of shear key under steel column by utilizing rear-mounted shear key Download PDFInfo
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- CN217679644U CN217679644U CN202221786545.6U CN202221786545U CN217679644U CN 217679644 U CN217679644 U CN 217679644U CN 202221786545 U CN202221786545 U CN 202221786545U CN 217679644 U CN217679644 U CN 217679644U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
- 238000012217 deletion Methods 0.000 title description 2
- 230000037430 deletion Effects 0.000 title description 2
- 239000000126 substance Substances 0.000 claims description 11
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000008034 disappearance Effects 0.000 abstract description 2
- 230000003313 weakening effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses a structure for solving the problem of the lack of a shear key under a steel column by utilizing a rear-mounted shear key, which is characterized in that; the structure is provided with a steel column foundation and rear-mounted shear keys, wherein the rear-mounted shear keys are fixed on the steel column foundation and are connected by screws with hoses sleeved on the surfaces thereof, wherein the screws are arranged in pairs left and right or front and back; and a column base bottom plate is arranged between the rear-mounted shear keys, and micro-expansion concrete is filled in a gap between the column base bottom plate and the top surface of the foundation. The utility model discloses the back dress shear key of utilization is solved the steel column and is leaded to the ability weakening problem of shearing because of the shear key disappearance.
Description
Technical Field
The utility model relates to a light, heavy steel construction field specifically says a structure that shear key lacked under utilizing back dress shear key to solve the steel column specifically for utilizing back dress shear key to solve because of the steel column under the shear key lacked the technical method that the shear resistance of structure is weakened.
Background
In recent decades, china has developed economy rapidly, and the manufacturing industry is particularly developed, so that China is also called a world factory. With the vigorous development of the manufacturing industry, production workshops and plants like the bamboo shoots in spring after rain appear all over the country. The steel structure has the advantages of low manufacturing cost, large using space, short construction period, recyclable materials and the like, and is widely applied to factory building structures, and the portal rigid frame is taken as an example for introduction below.
The portal rigid frame structure has become a structural system with relatively mature design and construction standards after the development of hundreds of years. The portal rigid frame mainly comprises steel columns, steel beams, a supporting system, an enclosure system and the like, and is generally processed and manufactured in a factory and assembled and constructed on site.
The shear key of the portal frame is mainly used for bearing the shear force transmitted from the column foot of the portal frame. Usually, the shear key is welded on the column base bottom plate, a hole is reserved on the top surface of the common column lower foundation during construction, and the gap between the column lower bottom plate and the top surface of the foundation is subjected to secondary concrete grouting and pouring after the shear key is inserted into the reserved hole. In an actual situation, due to the construction characteristics of the portal rigid frame, the civil engineering unit of the construction site is matched with the steel structure professional sub-packaging unit without tacit; designers are negligent; the foundation of the steel column is particularly dense due to the intersection of the foundation steel bars of the steel column and the ground beam steel bars in the longitudinal direction and the transverse direction; such a case makes it impossible to construct the shear key according to a predetermined method.
Against this background, a simple and reliable method for increasing the shear resistance of a structure is proposed.
SUMMERY OF THE UTILITY MODEL
Due to the fact that in the construction of a steel structure, the steel column shear key is omitted or cannot be installed generally due to various reasons. The invention aims to provide a structure for solving the problem of shear key loss under a steel column by utilizing an after-loading shear key on the premise of ensuring that the existing construction result is not reworked, and the technical scheme is used for solving the problem of weakened shear resistance of the steel column due to the shear key loss by utilizing the after-loading shear key.
The utility model is realized in such a way, a structure which utilizes the rear-mounted shear key to solve the problem of the lack of the shear key under the steel column is constructed, and the structure is characterized in that; the structure is provided with a steel column foundation and rear-mounted shear keys, wherein the rear-mounted shear keys are fixed on the steel column foundation and are connected by screws with hoses sleeved on the surfaces thereof, wherein the screws are arranged in pairs left and right or front and back; and a column base bottom plate is arranged between the rear-mounted shear keys, and micro-expansion concrete is filled in a gap between the column base bottom plate and the top surface of the foundation.
The structure for solving the problem of the lack of the shear key under the steel column by utilizing the after-loading shear key is characterized in that the shear key is arranged at the bottom of the steel column; and (3) a groove with the depth of 5cm and the length and width larger than that of an after-loading shear key is drilled on the steel column foundation, the shear key corresponds to the groove, a chemical bolt is driven into the groove, and the after-loading shear key is firmly connected to the bottom surface of the groove through the chemical bolt.
According to the utility model discloses a structure of utilizing back-loading shear key to solve the shear key disappearance under the steel column, its characterized in that; the rear-mounted shear key consists of angle steel and stiffening ribs; the thickness of the angle steel is controlled to be more than or equal to 12mm; the stiffening ribs are steel plates with the thickness more than or equal to 8 mm.
The utility model has the advantages of as follows: the construction is simple, the workload is small, and the existing construction result is hardly damaged; the structure is reliable, whether the chemical bolt fixing technology or the screw rod connecting technology belongs to a mature technology, a large amount of engineering practice verification is obtained, in addition, compared with the traditional method, the under-column shear key needs to be poured with concrete for the second time in the shear key reserved hole, the shear is carried out through the extrusion force after the concrete is solidified, the method is inconvenient to construct, belongs to concealed engineering construction, the quality is difficult to ensure, and the actual shear effect needs to be discounted; the rear-loading shear keys are flexibly arranged, and compared with the conventional shear keys which can only be arranged at the bottom of the column, the rear-loading shear keys can be flexibly arranged around the column base bottom plate, the quantity of the rear-loading shear keys can be flexibly adjusted, and the problem of construction difficulty caused by dense steel bars is solved.
Drawings
Fig. 1-3 are front, side, and top views of a shear key according to the present invention;
FIG. 4 is a layout view of a rear loading shear key around a column shoe base plate;
fig. 5 is a cross-sectional view after installation of the rotated shear key.
Wherein: the steel column is characterized in that a shear key is installed behind the steel column 1, a chemical bolt is installed behind the steel column 2, a connecting screw rod with a hose is sleeved on the surface of the steel column 3, a connecting nut is installed on the connecting screw rod, concrete is poured into the connecting nut 5, a steel column foundation 6, a column base bottom plate 7, angle steel 8 and a stiffening rib 9 are installed on the surface of the steel column base bottom plate 7.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, 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 efforts all belong to the protection scope of the present invention.
Due to the fact that in the construction of a steel structure, the steel column shear key is omitted or cannot be installed generally due to various reasons. The invention aims to provide a method for mounting a shear key after installation, which is convenient to install, simple to construct and reliable in structure on the premise of ensuring that the existing construction result is not reworked, and solve the problem that a rigid frame column resists shearing.
When the utility model is implemented; the structure comprises a steel column foundation 6 and an after-loading shear key 1, wherein the after-loading shear key 1 is fixed on the steel column foundation 6, and the after-loading shear keys 1 which are arranged in pairs left and right or front and back are connected by a screw rod 3 with a hose sleeved on the surface; a column base bottom plate 7 is arranged between the rear-mounted shear keys 1, and micro-expansion concrete 5 is filled in a gap between the column base bottom plate 7 and the top surface of the foundation.
When the utility model is implemented; a groove with the depth of 5cm and the length and the width larger than that of a post-installed shear key 1 is cut in a steel column foundation 6, the shear key 1 corresponds to the groove, a chemical bolt 2 is driven into the groove, and the post-installed shear key 1 is firmly connected to the bottom surface of the groove through the chemical bolt 2.
When the utility model is implemented; the rear-mounted shear key 1 consists of angle steel 8 and stiffening ribs 9; the thickness of the angle steel 8 is controlled to be more than or equal to 12mm; the stiffening ribs 9 are steel plates with the thickness more than or equal to 8 mm.
This utility model discloses in: the rear-mounted shear key is made of common angle steel in a steel structure, the thickness of the angle steel is controlled to be larger than or equal to 12mm (if the thickness of the angle steel is too small, the length of the shear key needs to be increased, the number of fixing bolts and screws needs to be increased), the end part of the shear key needs to be provided with a stiffening rib, the stress performance of the shear key is improved, and the stiffening rib can be a steel plate with the thickness larger than or equal to 8 mm. After the shear key is positioned in the foundation, the shear key is firmly fixed on the foundation by using a chemical bolt, a screw (the surface of the screw is required to be sleeved with a hose to ensure that the middle stressed part of the screw is not directly contacted with secondary poured concrete, and the purpose of the method is to ensure that the force generated by the sliding of the steel column base plate is only born by the tensile force of the screw) passes through a gap between the column base plate and the top surface of the foundation, the shear keys in the same direction are connected, and the bolts are simultaneously screwed up left and right when the screw is fixed to ensure that the column base plate does not deviate; after the bolts are screwed down, micro-expansion concrete is poured into gaps of the column bases for the second time, and the grade of the micro-expansion concrete is generally improved by one grade compared with that of basic concrete. The mechanism of the device is as follows: the column base generates shearing force, the effect of the shearing force can enable the column base steel plate to slide in a plane, and the shear keys are arranged around the column base steel plate, so that the sliding in the plane of the column base steel plate can be successfully limited, and the effect of resisting the shearing force is achieved.
Referring to fig. 1 to 5, a method for solving the problem that the shear resistance of a lower shear key of a steel column is weakened by using a rear-loading shear key is sequentially performed according to the following steps:
A. setting a post-installation shear key position in a steel column foundation, and excavating a groove with the depth of about 5cm and the length and width slightly larger than the post-installation shear key, wherein the groove needs to avoid a ground beam and a pile foundation or an independent foundation steel bar;
B. drilling holes in the grooves, cleaning the holes and driving chemical bolts according to the positions of the cut grooves;
C. firmly connecting the shear key to the bottom surface of the groove by using a chemical bolt;
D. the shear keys which are arranged in pairs at the left side and the right side (or the front side and the back side) are connected by utilizing the screw rod of which the surface is sleeved with the hose, and the shear keys are required to be screwed in uniformly at the left side and the right side (or the front side and the back side) simultaneously in the process of screwing the screw bolt, so that the shear keys are ensured to be firmly attached to the edge of the column base bottom plate, and the bottom plate is ensured not to be displaced due to stress in the screwing process;
E. pouring micro-expansion concrete into the grooves and gaps between the column base bottom plate and the top surface of the foundation, wherein the grade of the concrete is higher than that of the foundation by one grade;
F. and curing the micro-expansive concrete.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A structure for solving the problem of the lack of a lower shear key of a steel column by utilizing an after-installed shear key is characterized in that; the structure is provided with a steel column foundation (6) and an after-loading shear key (1), wherein the after-loading shear key (1) is fixed on the steel column foundation (6), and the after-loading shear keys (1) which are arranged in pairs left and right or front and back are connected by a screw (3) the surface of which is sleeved with a hose; a column base bottom plate (7) is arranged between the rear-mounted shear keys (1), and micro-expansion concrete (5) is poured into a gap between the column base bottom plate (7) and the top surface of the foundation.
2. The structure for solving the loss of the shear keys below the steel columns by using the after-loading shear keys as claimed in claim 1, wherein; a groove with the depth of 5cm and the length and the width larger than that of an after-loading shear key (1) is formed in a steel column foundation (6), the after-loading shear key (1) corresponds to the groove, a chemical bolt (2) is driven into the groove, and the after-loading shear key (1) is firmly connected to the bottom surface of the groove through the chemical bolt (2).
3. The structure for solving the loss of the shear keys below the steel columns by using the after-loading shear keys as claimed in claim 1, wherein; the rear-mounted shear key (1) consists of angle steel (8) and stiffening ribs (9); the thickness of the angle steel (8) is controlled to be more than or equal to 12mm; the stiffening ribs (9) are steel plates with the thickness more than or equal to 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221786545.6U CN217679644U (en) | 2022-07-12 | 2022-07-12 | Structure for solving deletion of shear key under steel column by utilizing rear-mounted shear key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221786545.6U CN217679644U (en) | 2022-07-12 | 2022-07-12 | Structure for solving deletion of shear key under steel column by utilizing rear-mounted shear key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217679644U true CN217679644U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221786545.6U Active CN217679644U (en) | 2022-07-12 | 2022-07-12 | Structure for solving deletion of shear key under steel column by utilizing rear-mounted shear key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217679644U (en) |
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2022
- 2022-07-12 CN CN202221786545.6U patent/CN217679644U/en active Active
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