CN111502079A - Cold-formed steel composite shear wall and method for toughening wallboard thereof at connecting piece - Google Patents

Cold-formed steel composite shear wall and method for toughening wallboard thereof at connecting piece Download PDF

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Publication number
CN111502079A
CN111502079A CN202010455099.XA CN202010455099A CN111502079A CN 111502079 A CN111502079 A CN 111502079A CN 202010455099 A CN202010455099 A CN 202010455099A CN 111502079 A CN111502079 A CN 111502079A
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China
Prior art keywords
wallboard
pasting
sheet
cold
whisker
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CN202010455099.XA
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Chinese (zh)
Inventor
江力强
张星铄
蒋丽忠
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Central South University
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Central South University
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Priority to CN202010455099.XA priority Critical patent/CN111502079A/en
Publication of CN111502079A publication Critical patent/CN111502079A/en
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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
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
    • E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/024—Structures with steel columns and beams

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Finishing Walls (AREA)
  • Load-Bearing And Curtain Walls (AREA)

Abstract

The invention discloses a cold-formed steel composite shear wall and a toughening method of a wallboard at a connecting piece, wherein the composite shear wall comprises a cold-formed steel structure frame and a wallboard fixed on the outer side of the cold-formed steel structure frame through a self-tapping screw, and the wallboard is attached to a fiber material attaching sheet at the joint of the self-tapping screw through an interface structure adhesive to serve as a toughening structure; the attaching density of the attaching sheets at the end part, the corner part and the opening on the wall board is increased. The coating pieces have the advantages of high strength, high elastic modulus, high toughness and easiness in processing, the toughness of the wallboard at the connection part of the self-tapping screw is greatly enhanced by bonding the interface structure adhesive with the wallboard, and particularly the coating pieces are densely arranged at the end part, the corner part and the hole of the wallboard which are stressed greatly, so that the toughening effect of the areas is better. The toughening treatment of the wallboard made of the brittle material at the connection position of the tapping screw can absorb more energy under the action of earthquake and wind load, thereby preventing the wallboard from cracking at the connection position of the tapping screw. Meanwhile, the force transmission effect of the tapping screw to the wallboard is weakened through toughening treatment.

Description

Cold-formed steel composite shear wall and method for toughening wallboard thereof at connecting piece
Technical Field
The invention belongs to the field of steel structure buildings, and particularly relates to a cold-formed steel composite shear wall and a method for toughening a wallboard of the cold-formed steel composite shear wall at a connecting piece.
Background
The cold-formed steel composite shear wall structure system is a novel building structure system which takes a cold-formed steel component as a main bearing system and takes a composite shear wall as a main lateral resisting system. The composite shear wall is the main component of the composite wall. The composite wall body is composed of upright posts, top beams, bottom beams, supports and wall boards, and connecting pieces are mainly connected by self-tapping screws. The system has the advantages of high assembly degree, high construction speed, environmental protection, energy conservation, high material utilization rate, low construction cost and the like.
The shear-resistant bearing capacity of the cold-formed steel composite shear wall structure is related to the factors such as the wall plate material, the height-width ratio of the wall plate, the hole opening rate of the wall plate, the distance between the erection columns, the connection performance of the connecting piece, the loading mode and the like. The failure mode of the composite shear wall mainly comprises wallboard failure, connector failure, erection column buckling and the like, wherein the most common failure mode is cracking at the joint of the wallboard and the self-tapping screw. The reason for this is that, compared with cold-formed steel and self-tapping screws, common building wallboards such as gypsum boards and fiber boards are brittle, and due to the difference in material properties between the two, the wallboard is prone to cracking at the joints of the self-tapping screws under the action of earthquake load, and the joints of the wallboard and the self-tapping screws are subjected to large stress at the ends, corners of holes, and the like, and are prone to cracking, while the damage at the middle positions of the wallboard is relatively weak. The holes are gradually enlarged when the connection part of the self-tapping screws is repeatedly loaded, so that the connection of the self-tapping screws is gradually failed, the shearing resistance and the bearing capacity of the self-tapping screws are rapidly reduced, and the composite shear wall is prematurely locally damaged due to the fact that the composite shear wall cannot absorb enough energy under the action of a small earthquake. In case the wallboard ftractures, the degree of safety of the pleasing to the eye degree, service function and the structure of wall body can reduce by a wide margin to cause the unable continuation of monoblock wallboard to use, need be through dismantling, change in order to guarantee the demand of building usability and security. In areas with frequent earthquakes, frequent disassembly and replacement of the wall panels undoubtedly greatly increase the maintenance cost of owners, and take up a lot of maintenance time while wasting materials.
Disclosure of Invention
The invention aims to provide a cold-formed steel composite shear wall capable of preventing a wallboard from cracking at a self-tapping screw joint due to a shearing force and a wallboard toughening method thereof.
The cold-formed steel composite shear wall provided by the invention comprises a cold-formed steel structure frame and a wallboard fixed on the outer side of the cold-formed steel structure frame through a self-tapping screw. The wallboard further comprises a pasting sheet made of fiber materials, wherein the pasting sheet serves as a toughening structure and is pasted to the corresponding connection position of the self-tapping screw on the wallboard through interface structure glue; the attaching density of the attaching sheets at the end part, the corner part and the opening on the wall board is increased.
In an embodiment of the above technical solution, the material of the cover sheet may be any one of a carbon fiber reinforced composite material, a glass fiber reinforced composite material, and an aramid fiber reinforced composite material.
In an embodiment of the above technical solution, the shape of the patch may be any one of a square shape, a diamond shape, and an oval shape.
In one embodiment of the above technical scheme, the distance between adjacent attaching sheets at the corner of the wallboard and the corner of the opening on the wallboard is not more than 300mm, and the distance between other positions around the wallboard is not more than 500 mm.
In one embodiment of the above technical scheme, the coating sheets around the wall plate and around the opening on the wall plate are fixed in a manner of symmetrically coating the surfaces of both sides of the wall plate.
In one embodiment of the above technical solution, the thickness of the coating sheet is 0.1-1mm, and the single-side coating area of the coating sheet after coating the wallboard is not less than 25mm2。
In another embodiment of the above technical solution, the composite shear wall further includes a strip-shaped whisker-shaped anchor sheet, which is made of the same material as the attaching sheet, one end section of the strip-shaped whisker-shaped anchor sheet is attached to the attaching sheet after the interface structure adhesive is applied, the other end section of the strip-shaped whisker-shaped anchor sheet is attached to the wall panel, and the length of the strip-shaped whisker-shaped anchor sheet attached to the wall panel is longer than the length of the strip-shaped whisker-shaped anchor sheet.
In another embodiment of the above technical solution, the thickness of the whisker-shaped anchor sheet is the same as that of the attachment sheet, the width of the whisker-shaped anchor sheet is not less than 10mm, the length of the whisker-shaped anchor sheet is not less than 30mm, and the overlapping length between the whisker-shaped anchor sheet and the attachment sheet is not less than 10 mm.
In another embodiment of the above solution, the whisker-like anchor blades are symmetrically arranged with respect to the automatic screw.
The invention provides a method for toughening a wallboard of a cold-formed steel composite shear wall at a connecting piece, which comprises the following steps:
(1) selecting the material of the pasting cover sheet, determining the specific size, number and fixing position of the pasting cover sheet, and keeping the wall board and the surface of each pasting cover sheet clean and dry;
(2) marking the fixed position of the corresponding coating sheet on the surface of the wallboard according to the specific position of the self-tapping screw;
(3) smearing interface structure glue on each pasting covering sheet;
(4) fixing the patch at a designated position on the wall panel
Before fixing the pasting covering pieces at the corner of the wallboard and the corner of the opening on the wallboard, bending the pasting covering pieces twice, wherein the distance between two bending lines is the thickness of the wallboard, and then pasting and fixing the pasting covering pieces at the positions between the two bending lines corresponding to the thickness sides of the wallboard so that the pasting covering pieces are identical in the covering areas of the two surfaces of the wallboard;
(5) fully bonding the coating sheets and the wallboard, and then placing the wallboard in a dry and ventilated indoor environment for natural curing until the interface structural adhesive is fully cured;
when the toughening strength of the pasting covering piece to the wallboard is insufficient, the pasting between the pasting covering piece and the wallboard is strengthened through the whisker-shaped anchor piece, the material of the whisker-shaped anchor piece is the same as that of the pasting covering piece, after the whisker-shaped anchor piece is coated with interface structure glue, the two end sections are respectively bonded with the pasting covering piece and the wallboard into a whole, and after the pasting covering piece and the whisker-shaped anchor piece are fixed, the wallboard is maintained according to the step (5).
According to the invention, the pasting covering pieces of the fiber material are pasted on the wallboard corresponding to the connection part of the self-tapping screw, the fiber material is a flexible material, the advantages of high strength, high elastic modulus, high toughness and easiness in processing are utilized, the pasting covering pieces are bonded with the wallboard through interface structure glue, so that the toughness of the wallboard at the connection part of the self-tapping screw is greatly enhanced, and particularly, the pasting covering pieces are densely arranged at the end part, the corner part and the opening of the wallboard which are stressed greatly, so that the toughening effect of the areas is better. The wall board made of brittle materials can absorb more energy under the action of earthquake and wind load after the toughening treatment at the connection part of the tapping screw, so that the wall board at the connection part of the tapping screw is prevented from cracking under the action of shearing force. In addition, when the wall plate is fixed with the cold-formed steel structure frame, the self-tapping screw penetrates through the interface structure glue, and the force transmission effect of the self-tapping screw on the wall plate is weakened.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
Fig. 2 is a schematic view of the fig. 1 structure with the whisker-like anchor sheet removed.
Fig. 3 is an enlarged schematic view of a-a in fig. 1.
Fig. 4 is a first schematic top view of fig. 3.
Fig. 5 is a second schematic top view of fig. 3.
Fig. 6 is a top view of fig. 3.
Detailed Description
As shown in fig. 1, the cold-formed steel composite shear wall disclosed in this embodiment includes a cold-formed steel structural frame, a wall board QB, a patch TFP, a whisker-shaped anchor patch MP, and a tapping screw L D.
The cold-formed steel structural frame includes vertical frame posts J L Z and transverse guide rails DG.
The wallboard QB is a light wallboard, and can be any one of gypsum wallboard, calcium silicate board, oriented strand board, fiber board and the like.
In the figure 1, only the connection between the periphery of the wallboard and the opening and the cold-formed steel structure frame is shown, in the figure, the vertical two sides of the wallboard QB are fixed with the erection column J L Z through self-tapping screws L D, and the horizontal two ends are fixed with the guide rail DG through self-tapping screws L D.
Compared with cold-formed steel and self-tapping screws, the material of the wallboard is brittle, and due to the difference of material properties, the wallboard is easy to crack at the joint of the self-tapping screws under the action of earthquake load, and cracks are more obvious at the positions with larger stress, such as the end part, the corner part of the opening and the like of the wallboard, especially the corner part.
In order to improve the crack resistance of the wallboard at the joint of the tapping screws, the wallboard of the embodiment is provided with the coating sheet TFP at the joint of the tapping screws L D, and the coating sheet and the wallboard QB are bonded into a whole through the interface structure adhesive JGJ.
As can be seen from fig. 1 to 4, the patch of the present embodiment is rectangular. The material of the patch is any one of carbon fiber reinforced Composite (CFRP), glass fiber reinforced composite (GFRP), aramid fiber reinforced composite (AFRP) and the like.
Other embodiments of the patch may be diamond shaped, oval shaped, etc. as shown in fig. 5 and 6.
Because the corners of the wall board, the corners of the opening and other positions with larger stress are more obviously cracked under the action of earthquake load, the corners of the wall board and the corners of the opening are more densely provided with the coating pieces, namely the corners of the wall board and the corners of the opening are toughening and strengthening areas JQQ, and as shown in figures 1 and 2, the coating pieces at the corners are connected into a whole.
The connection position of the tapping screw L D is at the central position after the patch is covered on the wallboard, i.e. the central position is the positioning position of the patch.
In order to ensure that the toughening effect is fully exerted, the positioning space of the TFP of the attaching sheet in the non-reinforced area is not more than 500mm, and the positioning space of the JQQ of the reinforced area is not more than 300 mm.
As can be seen from fig. 3, in the embodiment, when the attaching sheets are arranged around the wall board, the attaching sheets are symmetrically wrapped around the two sides of the wall board, and the tapping screws penetrate through the attaching sheets and the interface structure glue on the two sides of the wall board and then are screwed into the frame columns or the guide rails. The two sides of the wallboard are toughened by the adhesive with the surface structure and the covering sheets, the toughening effect is good, in addition, the self-tapping screw avoids the direct contact with the wallboard, and the force transmission effect is weakened.
In order to further improve the integrity between the pasting sheet and the wallboard, the pasting sheet TFP and the wallboard QB are bonded and anchored through a whisker-shaped anchor sheet MP, the whisker-shaped anchor sheet is a strip-shaped fiber sheet, after the interface structure glue JGJ is coated, one end section of the whisker-shaped anchor sheet is bonded on the surface of the pasting sheet, and the other end section of the whisker-shaped anchor sheet is bonded on the surface of the wallboard.
The thickness of the TFP is preferably 0.1-1mm, and the single-side pasting area after the TFP is pasted on the wallboard is not less than 25mm2。
The whisker-like anchor pieces MP are symmetrically arranged in pairs about the joint of the automatic screw L D, and a pair of whisker-like anchor pieces may be arranged in parallel as shown in fig. 1, other embodiments may also arrange a pair of whisker-like anchor pieces at an included angle, such as an included angle of 30 °, 60 ° or 90 °, according to actual needs.
The thickness of the whisker-shaped anchor sheet MP is the same as that of the sticking sheet TFP, the width of the whisker-shaped anchor sheet is not less than 10mm, the length of the whisker-shaped anchor sheet is not less than 30mm, and the overlapping length between the whisker-shaped anchor sheet and the sticking sheet is not less than 10 mm.
In order to fully cure the interface structure adhesive, after the coating sheet and the whisker-shaped anchor sheet are fixed at the designated positions on the wallboard, the wallboard is placed in a room with the temperature not higher than 30 ℃ for natural curing, and the curing time is not less than 24 hours.
After the wallboard is maintained, the pasting sheet, the whisker-shaped anchor sheet and the wallboard have good integrity.
After the wall board is fixed on the cold-formed steel structure frame to form the composite shear wall, when the wall board is subjected to earthquake or wind load, the periphery and the periphery of the opening of the wall board are toughened, particularly the corners and the corners of the opening of the wall board are reinforced and toughened, and the materials, the thicknesses and the plane sizes of the attaching sheets and the whisker-shaped anchor sheets can be selected according to the maximum level earthquake and the maximum wind power which can be generated locally, so that the key areas of the wall board can not crack.
And the cracking damage of the middle area between the peripheries of the wallboards is much weaker, so that the middle area can judge whether toughening treatment is needed or not according to calculation, and if the toughening treatment is needed, the single side or double sides of the connection part of the tapping screw can be provided with a coating sheet, a whisker-shaped anchor sheet and the like according to the calculation result.
The toughening treatment steps of the wallboard are as follows:
carrying out pasting and covering sheet positioning on a batch of wallboards in a factory according to design requirements, wherein the pasting and covering sheet positioning is equivalent to self-tapping screw positioning;
coating interface structural adhesive on the pasting covering sheet and the whisker-shaped anchor sheet;
sticking the sticking sheet coated with the interface structure adhesive on the corresponding position and the local reinforcing area of the wallboard in a double-sided wrapping mode, and repeatedly rolling the surfaces of the sticking sheet and the whisker-shaped anchor sheet by using a tool to fully bond the interface structure adhesive with the sticking sheet, the whisker-shaped anchor sheet and the wallboard;
and placing the wallboard in a dry and ventilated indoor environment for natural curing until the interface structural adhesive is fully cured.
The cold-formed steel structure frame of the composite shear wall is also well manufactured in a factory.
The steel structure frame and the wall board subjected to toughening treatment are transported to a construction site and assembled into a composite shear wall through the self-tapping screws, the self-tapping screws of the assembly connecting piece are well positioned on the attaching sheets, the on-site elastic wire positioning work is avoided, the working procedures are saved, the operation is simpler and more convenient, and the wall board attached with the fiber material attaching sheets is transported to the construction site to be connected and fixed through the self-tapping screws.
This embodiment is glued the combined action through subsides cover plate, must form anchor piece and cross-section structure that corresponds self-tapping screw hookup location department on the wallboard, has guaranteed to paste bond strength, toughening effect and stability between cover plate and the wallboard, has following advantage:
1. the ductility of the cold-formed steel composite wall is improved, the defect that the cold-formed steel composite wall consumes less energy in an earthquake is overcome, and the cold-formed steel composite wall can absorb more energy under the action of medium or large earthquake.
2. Compared with the traditional wallboard, the defect that the shearing-resistant bearing capacity of the wallboard is easy to lose efficacy due to cracking under the action of small earthquakes is overcome, a house user in an area with frequent earthquakes does not need to frequently replace the wallboard, and the maintenance cost is reduced.
3. The bonding area of the fiber material attaching sheet and the wallboard is increased due to the connection of the fibrous anchor sheet, the defect that the attaching sheet and the wallboard are bonded and failed due to insufficient bonding strength is avoided, and the toughening effect is ensured.
4. The defect that the attractiveness of the wallboard is reduced due to the fact that the wallboard is prone to cracking is overcome, and the living safety of a user is improved.
5. The mode of pasting the covering sheet on the partial position of the wallboard and locally reinforcing is adopted, so that the manufacturing cost of the wallboard is saved, and the construction is simple.
6. The self-tapping screw positioning device can complete self-tapping screw positioning work on the surface of the attaching cover sheet in a factory, saves working procedures and is simpler and more convenient to operate compared with the self-tapping screw elastic line positioning work completed on a construction site.
7. The fiber material has high strength-to-weight ratio, good toughness and low price, so that the wallboard has relatively low manufacturing cost.

Claims (10)

1. The utility model provides a cold-forming steel composite shear wall, includes cold-forming steel structure frame and through self-tapping screw fixation in the wallboard in its outside, its characterized in that: the wallboard further comprises a pasting sheet made of fiber materials, wherein the pasting sheet serves as a toughening structure and is pasted to the corresponding connection position of the self-tapping screw on the wallboard through interface structure glue; the attaching density of the attaching sheets at the end part, the corner part and the opening on the wall board is increased.
2. A cold-formed steel composite shear wall of claim 1, wherein: the material of the coating sheet can be any one of carbon fiber reinforced composite materials, glass fiber reinforced composite materials and aramid fiber reinforced composite materials.
3. A cold-formed steel composite shear wall according to claim 1 or 2, wherein: the shape of the patch can be any one of square, diamond and ellipse.
4. A cold-formed steel composite shear wall of claim 3, wherein: the distance between adjacent attaching sheets at the corner of the wallboard and the corner of the opening on the wallboard is not more than 300mm, and the distance between other positions around the wallboard is not more than 500 mm.
5. A cold-formed steel composite shear wall of claim 4, wherein: the coating sheets around the wall plate and around the upper opening of the wall plate are fixed in a mode of symmetrically coating the surfaces of the two sides of the wall plate.
6. A cold-formed steel composite shear wall of claim 5, wherein: the thickness of the coating sheet is 0.1-1mm, and the single-side coating area of the coating sheet after being wrapped on the wallboard is not smallAt 25mm2。
7. A cold-formed steel composite shear wall of claim 6, wherein: the wall board further comprises a strip-shaped whisker-shaped anchor sheet which is made of the same material as the pasting sheet, one end section is attached to the pasting sheet after the interface structure glue is smeared, the other end section is attached to the wall board, and the length of the pasting sheet attached to the wall board is longer than that of the pasting sheet.
8. A cold-formed steel composite shear wall of claim 7, wherein: the thickness of the whisker-shaped anchor piece is the same as that of the sticking cover piece, the width of the whisker-shaped anchor piece is not less than 10mm, the length of the whisker-shaped anchor piece is not less than 30mm, and the overlapping length between the whisker-shaped anchor piece and the sticking cover piece is not less than 10 mm.
9. A cold-formed steel composite shear wall of claim 8, wherein: the whisker-like anchor pieces are symmetrically arranged with respect to the automatic screw.
10. A method for toughening a wallboard of a cold-formed steel composite shear wall at a connecting piece comprises the following steps:
(1) selecting the material of the pasting cover sheet, determining the specific size, number and fixing position of the pasting cover sheet, and keeping the wall board and the surface of each pasting cover sheet clean and dry;
(2) marking the fixed position of the corresponding coating sheet on the surface of the wallboard according to the specific position of the self-tapping screw;
(3) smearing interface structure glue on each pasting covering sheet;
(4) fixing the patch at a designated position on the wall panel
Before fixing the pasting covering pieces at the corner of the wallboard and the corner of the opening on the wallboard, bending the pasting covering pieces twice, wherein the distance between two bending lines is the thickness of the wallboard, and then pasting and fixing the pasting covering pieces at the positions between the two bending lines corresponding to the thickness sides of the wallboard so that the pasting covering pieces are identical in the covering areas of the two surfaces of the wallboard;
(5) fully bonding the coating sheets and the wallboard, and then placing the wallboard in a dry and ventilated indoor environment for natural curing until the interface structural adhesive is fully cured;
when the toughening strength of the pasting covering piece to the wallboard is insufficient, the pasting between the pasting covering piece and the wallboard is strengthened through the whisker-shaped anchor piece, the material of the whisker-shaped anchor piece is the same as that of the pasting covering piece, after the whisker-shaped anchor piece is coated with interface structure glue, the two end sections are respectively bonded with the pasting covering piece and the wallboard into a whole, and after the pasting covering piece and the whisker-shaped anchor piece are fixed, the wallboard is maintained according to the step (5).
CN202010455099.XA 2020-05-26 2020-05-26 Cold-formed steel composite shear wall and method for toughening wallboard thereof at connecting piece Pending CN111502079A (en)

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CN202010455099.XA CN111502079A (en) 2020-05-26 2020-05-26 Cold-formed steel composite shear wall and method for toughening wallboard thereof at connecting piece

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114294311A (en) * 2021-12-30 2022-04-08 中南大学 Anti-pulling flexible shear-resistant self-tapping screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114294311A (en) * 2021-12-30 2022-04-08 中南大学 Anti-pulling flexible shear-resistant self-tapping screw
CN114294311B (en) * 2021-12-30 2022-09-16 中南大学 Anti-pulling flexible shear-resistant self-tapping screw

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