The invention belongs to the field of wood building joint design, and particularly relates to a cylindrical sleeve-type steel-wood composite joint formed by connecting cylindrical wood columns and X-shaped wood beams, and an assembly method thereof.
In the field of modern buildings focusing on environmental friendliness, wood-structured buildings, as low-energy-consumption, light and environmentally-friendly buildings, have great application potentials and high research value. Wood structures featured by short construction period, energy conservation, environmental friendliness, and good seismic resistance and energy-dissipating capacity have the advantages of flexible configuration, sound insulation and shock attenuation in design.
The joints of the wood-structured buildings are one of the most important regions of the entire structure. The column-beam force-transfer intersections of traditional pure-wood joints are prone to destructive losses. Most existing joints are pure-steel joints that realize connection by inserting steel sheets into wood. However, the pure-steel joints are prone to stress concentration, and cracks may be caused along the texture in the opening direction. In addition, to guarantee essential force transfer of beams, the force-transfer section of vertical columns is often weakened, which results in poor integrity and poor stress performance; and the seismic performance of the vertical columns is superior to that of other portions.
The invention provides a novel cylindrical sleeve-type steel-wood composite joint, which innovatively designs the connection between fiberglass reinforced paneLjFRP) cylindrical wood columns and X-shaped wood beams to enhance the force-transfer capacity of vertical columns and avoid adverse influences of force transfer of the beams on force transfer of the columns, and is easy to assemble and operate.
The invention is implemented through the following technical solution: a cylindrical sleeve-type steel-wood composite joint comprises FRP cylindrical wood columns and X-shaped wood beams, and further comprises a key connecting component, arc connecting pieces and splicing outer ring plates, wherein the FRP cylindrical wood columns are connected through the key connecting component, the X-shaped wood beams are connected to the key connecting component through the arc connecting pieces, the splicing outer ring plates are arranged at upper and lower ends of the arc connecting pieces, and the splicing outer ring plates are fixed with bolts to realize combination and connection;
The key connecting component comprises cylindrical steel sleeve plates, a connecting sleeve, a cylindrical solid wood and filling wood blocks, wherein the cylindrical solid wood is arranged in the connecting sleeve, the connecting sleeve is made of steel, steel bar holes allowing penetrative steel bars to be inserted therein are formed in the cylindrical steel sleeve plates, the penetrative steel bars penetrate through the corresponding steel bar holes in the cylindrical steel sleeve plates to integrally connect the FRP cylindrical wood columns in an axial direction, and corresponding steel bar holes are formed in the FRP cylindrical wood columns; the cylindrical steel sleeve plates are arranged at upper and lower ends of the connecting sleeve, the inner diameter of the cylindrical steel sleeve plates is equal to the outer diameter of the FRP cylindrical wood columns, and the filling wood blocks encircle the connecting sleeve, are arranged between the upper and lower cylindrical steel sleeve plates and are fixed with glue;
Each arc connecting piece comprises a perforated arc base plate and two perforated arc steel plates, wherein the two perforated arc steel plates are arranged on the perforated arc base plate backing onto each other, and a space formed between the two perforated arc steel plates fits the X-shaped wood beams in shape; the arc connecting pieces are arranged around the outer circumference of the key connecting component, each perforated arc base plate is fixed on two adjacent filling wood blocks with wood screws, and the perforated steel plates are used to tighten the X-shaped wood beams. Eight screw holes are formed in each perforated arc base plate and correspond to four wood screw holes formed in each side of each filling wood block of the key connecting component, the wood screws penetrate through the perforated arc base plates to be screwed into the wood screw holes, and each arc connecting piece is fixed on two adjacent filling wood blocks. The distance between the two perforated arc steel plates is slightly greater than the thickness of webs of the X-shaped wood beams, four vertical bolt holes and two horizontal bolt holes are formed in each perforated arc steel plate, and the webs of the X-shaped wood beams are inserted between the perforated arc steel plates. Horizontal bolts penetrate through one arc steel plates, the webs of the X-shaped wood beams and the other arc steel plates and are then tightened with nuts, and vertical bolts penetrate through the splicing outer ring plates, flanges of the X-shaped wood beams and the arc steel plates and are then tightened with nuts.
Each splicing outer ring plate comprises a base plate and an arc hoop arranged on one side of the base plate, wherein bolt holes are formed in the surface of the base plate, and connecting clamps are also arranged on the base plate. The adjacent splicing outer ring plates are connected through the connecting clamps; and after being connected, the adjacent splicing outer ring plates externally hoop a middle part of the key connecting component to clamp the filling wood blocks and are integrally connected to the arc connecting pieces and the X-shaped wood beams through bolts to transfer internal force of the beams.
Furthermore, each FRP cylindrical wood column comprises a cylindrical wood column body and an FRP fabric arranged on the outer surface of the cylindrical wood column body. The FRP fabric wound on the outer surface of the cylindrical wood column body enhances the structural strength of the cylindrical wood column body.
Furthermore, arc splicing heads are arranged at upper and lower ends of the connecting sleeve, and connecting slots matched with the arc splicing heads are arranged on the cylindrical steel sleeve plates. The arc splicing heads are clamped in the connecting slots to connect the cylindrical steel sleeve plates and the connecting sleeve.
Furthermore, straight slots matched with the penetrative steel bars and notches matched with the arc splicing heads are formed in the filling wood blocks to realize tight fit of the filling wood blocks and the cylindrical steel sleeve plates.
Furthermore, a 45° angle is formed between each connecting clamp and the plane where the base plate is located to ensure that force is still transferred along the centroid line.
Furthermore, split bolts for tensioning the penetrative steel bars are further arranged on the cylindrical steel sleeve plates to apply a pre-stressing force to enhance the integrity and improve the overall performance of the key connecting components.
The invention further provides an assembly method of the cylindrical sleeve-type steel-wood composite joint, whith comprises the following steps:
A. Disposing the cylindrical steel sleeve plates around the FRP cylindrical wood columns injected with glue, arranging the split bolts on the penetrative steel bars, and screwing the arc splicing heads of the connecting sleeve, internally provided with the cylindrical solid wood, into the connecting slots in corresponding sides of the cylindrical steel sleeve plates;
B. Fixing the connecting sleeve between the cylindrical steel sleeve plates, inserting four filling wood blocks, and bonding the filling wood blocks into a whole with glue;
C. Assembling the four arc connecting pieces at corresponding positions of the filling wood blocks with wood screws, fixing each arc connecting piece on two adjacent filling wood blocks, and connecting the four arc connecting pieces to form a sleeve around the key connecting component;
D. Assembling the splicing outer ring plates close to the arc connecting pieces, and connecting the splicing outer ring plates into a hoop to clamp the filling wood blocks;
E. Tightening the split bolts on the penetrative steel bars, and applying an appropriate pre-stressing force to realize tight connection of the key connecting component to enhance the integrity of the key connecting component;
F. Inserting the FRP cylindrical wood columns into the sleeve on corresponding sides of the cylindrical steel sleeve plates, and injecting glue into the steel bar holes to complete installation of the FRP cylindrical wood columns in the vertical direction and the key connecting component; and
G. Inserting one end of each X-shaped wood beam between the two perforated arc steel plates of each arc connecting piece, inserting bolts for connection, and connecting the arc connecting pieces, the X-shaped beams and the splicing outer ring plates into a whole through the bolts to complete installation of the beams in the horizontal direction, so that assembly of the cylindrical sleeve-type steel-wood composite joint is finished.
Compared with the prior art, the invention has the following advantages and beneficial effects:
The entire cylindrical sleeve-type steel-wood composite joint provided by the invention is of a fully-spliced structure, the solid-wood connecting sleeve is connected to the cylindrical steel sleeve plates through slots in the core connection region, the filling wood blocks are filled in the connection region for glue connection, the split bolts are arranged on the penetrative steel bars, the design of the connecting sleeve can effectively guarantee the vertical bearing capacity of the joint, and the pre-stressing force applied by means of the split bolts can effectively improve the anti-seismic capacity of the structure; a horizontal load is borne by the splicing outer ring plates, and a vertical load is borne by the key connecting component, so that the bearing capacity is high, vertical force transfer is guaranteed, and mutual interference of horizontal force transfer and vertical force transfer is avoided.
Fully-prefabricated construction and assembly are realized on site, and only bolted connection and glue bonding are performed, so that operation is easy, assembly is fast, the quality is high, the design requirements of wood-structured buildings with special vertical bearing requirements can be met, and the composite joint can be applied to wood structures with extremely high requirements for the vertical bearing capacity and strength and has great market potentials in high-rise wood buildings.
To gain a better understanding of the purposes and advantages of the invention, the specific implementations of the invention are expounded below in conjunction with the accompanying drawings.
Embodiment 1: a cylindrical sleeve-type steel-wood composite joint, as shown in
As shown in
As shown in
As shown in
Each splicing outer ring plate 5 consists of four steel splicing components, and the shape of the splicing outer ring plate 5 is shown in
As shown in
According to the joint structure in this embodiment, the solid-wood connecting sleeve is connected to the cylindrical steel sleeve plates through slots in the core connection region, the filling wood blocks are filled in the connection region for glue connection, and a pre-stressing force is applied to the penetrative steel bars by means of the split bolts to enhance the combination to form an integrity; fully-prefabricated construction can be realized, the construction speed is high, and the structural integrity is good; the pre-stressing force can effectively improve the anti-seismic capacity of the structure; the design of the connecting sleeve can effectively guarantee the vertical bearing capacity of the joint; and through the ingenious design of the arc connecting pieces and the splicing outer ring plates, the joint can be applied to wood structures with extremely high requirements for the vertical bearing capacity and strength.
Embodiment 2: on the basis of the cylindrical sleeve-type steel-wood composite joint provided by Embodiment 1, this embodiment provides an assembly method of the cylindrical sleeve-type steel-wood composite joint. As shown in
Step 1: the cylindrical steel sleeve plates 9 are disposed around the FRP cylindrical wood columns 1 injected with glue, the split bolts are arranged on the penetrative steel bars, and the arc splicing heads of the connecting sleeve 10, internally provided with the cylindrical solid wood 11, are rotated by 45° to be screwed into the connecting slots in corresponding sides of the cylindrical steel sleeve plates 9;
Step 2: the connecting sleeve 10 is fixed between the cylindrical steel sleeve plates 9, and four filling wood blocks are inserted and bonded into a whole with glue;
Step 3: the arc connecting pieces 4 are disposed at the tails of middle parts two adjacent filling wood blocks of the key connecting component 3, four wood screws penetrate through each steel plate on each side and are screwed into the filling wood blocks to fix each arc connecting piece on two adjacent filling wood blocks, the four arc connecting pieces 4 are assembled at corresponding positions of the integrally bonded filling wood blocks 12 with the wood screws to form an untight sleeve, and the four filling wood blocks are integrated;
Step 4: the four components of each splicing outer ring plate 5 are assembled close to one arc connecting piece and are connected into a hoop through bolts to clamp the filling wood blocks; the splicing outer ring plates 5 are assembled at upper and lower ends of the arc connecting pieces 4; and after the splicing outer ring plates 5 are assembled, the FRPB fabric is wound on the upper side of the upper cylindrical steel sleeve plate or between the splicing outer ring plates and the cylindrical steel sleeve plates;
Step 5: the split bolts 17 on the penetrative steel bars 7 are tightened, and an appropriate pre-stressing force is applied to realize tight connection of the key connecting component 3 to enhance the integrity of the key connecting component;
Step 6: the FRP cylindrical wood columns 1 are inserted into the sleeve on corresponding sides of the cylindrical steel sleeve plates 9, and glue are injected into the steel bar holes to complete installation of the vertical columns and the key connecting component; and
Step 7: one end of each X-shaped wood beam 2 is inserted between the two arc plates of each arc connecting piece (4), and high-strength bolts are inserted into two horizontal bolt holes formed in each arc plate and a web of each X-shaped wood beam to realize connection;
Bolts are vertically inserted into two bolt holes correspondingly formed in the splicing outer ring plates, flanges of the X-shaped wood beams and the arc plates of the arc connecting pieces in the vertical direction and are tightened with special spacers and nuts; and
The arc connecting pieces 4, the X-shaped wood beams 2 and the splicing outer ring plates 5 are integrally connected through bolts to complete installation of the beams in the horizontal direction, so that assembly of the whole cylindrical sleeve-type steel-wood composite joint is finished.
The above embodiments are merely preferred ones of the invention, and are not intended to limit the invention in any forms. Any skilled in the art may apply equivalent embodiments obtained by modifying or transforming the technical contents disclosed above to other fields. Any simple amendments, equivalent modifications or transformations made to the above embodiments on the basis of the technical essence of the invention should also fall within the protection scope of the technical solutions of the invention.
Number | Date | Country | Kind |
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201910669607.1 | Jul 2019 | CN | national |
This application is the national stage entry of International Application No. PCT/CN2019/109295, filed on Sep. 30, 2019, which is based upon and claims priority to Chinese Patent Application No. 201910669607.1, filed on Jul. 24, 2019, the entire contents of which are incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/109295 | 9/30/2019 | WO | 00 |