Tensioned steel-wood structure cable joint

Abstract

The utility model relates to a kind of string steel wood structure cable node, comprising: double-piece glued wood arch, being intercepted as end wood arch and intermediate wood arch, and the end of intermediate wood arch is provided with insertion slot and first round hole;Box type cable node, embedded in the interception of double-piece glued wood arch, including steel box and cable connecting lug, one end of steel box is implanted into end wood arch by connecting reinforcing bar, and the other end is provided with several steel inserts and is inserted into the insertion slot of intermediate wood arch correspondingly, long round hole is also provided on steel insert;Connecting assembly, including glued wood pad, locking steel plate and several connecting bolts, glued wood pad is clamped between the two pieces of wood arch of intermediate wood arch and is provided with several second round holes, first round hole, second round hole and long round hole are one-to-one corresponding and are connected by connecting bolt, locking steel plate is fixed to the side of intermediate wood arch away from steel box.The utility model can ensure that double-piece glued wood arch and cable are arranged symmetrically across two sides.

Description

Technical Field

[0001] This utility model relates to the field of large-span building structure technology, and in particular to a cable joint for a tensioned steel-wood structure. Background Technology

[0002] With the development of timber structures in engineering practice and the pursuit of green and low-carbon environmental protection, the demand for timber structures in large-span venues (such as stadiums and exhibition halls) is increasing. Large-span tensioned steel-timber structures combine the advantages of timber's compressive strength along the grain and steel's tensile strength, utilizing the high strength and lightweight properties of glued laminated timber to effectively span large spaces. Among these, the cable joints are key components for transmitting cable forces and balancing horizontal forces within the structure; their stress distribution is complex and requires high reliability.

[0003] Traditional large-span timber structures have a high assembly rate, but in actual construction, errors in component processing and on-site installation are unavoidable. These structures are typically fully exposed, requiring extremely high precision and aesthetics in the finished building surface. In existing technologies, cable joints are mostly rigid connections, lacking effective error adjustment capabilities. If a method of constructing the structure segment by segment from one side to the other is adopted, cumulative errors are easily generated, leading to difficulties in final closure and causing cable asymmetry, severely affecting the structural load-bearing performance. Utility Model Content

[0004] The purpose of this utility model is to provide a cable-stayed joint for a tensioned steel-wood structure. It uses a cut wooden arch embedded in a steel box, so that the cross-section of the wooden arch is directly attached to the steel box to directly transmit axial force. The force transmission is direct and reliable. At the same time, it can effectively absorb and adjust processing and construction errors, ensure symmetrical cable arrangement, make the structure stress reasonable, facilitate construction, and ensure the aesthetics of the final building effect.

[0005] To achieve the above objectives, this utility model provides a cable-stayed joint for a tensioned steel-wood structure, comprising:

[0006] A double-layer glued laminated timber arch is cut into an end arch and a middle arch. The end of the middle arch is provided with a splice groove, and the middle arch is also provided with a number of first round holes. The first round holes penetrate the area where the splice groove is opened perpendicularly along the thickness direction of the double-layer glued laminated timber arch.

[0007] A box-type cable joint is embedded at the cut-off point of the double-layer glued laminated timber arch. The box-type cable joint includes a steel box body and cable connecting lugs. The cable connecting lugs are inserted into the steel box body and connected to the steel box body. One end of the steel box body is provided with several connecting steel bars, which are implanted into the end timber arch. The other end is provided with several steel insert plates, which are inserted into the insertion slots of the middle timber arch. The steel insert plates are also provided with elongated holes.

[0008] A connecting assembly is used to connect the intermediate wooden arch and the box-type cable node. The connecting assembly includes a glued laminated timber pad, a locking steel plate and several connecting bolts. The glued laminated timber pad is sandwiched between the two wooden arches of the intermediate wooden arch, and several second round holes are opened on the glued laminated timber pad. The first round hole, the second round hole and the oblong hole correspond one-to-one and are connected by the connecting bolts. The locking steel plate is fixed to the side of the intermediate wooden arch away from the steel box body.

[0009] The end faces of the steel box body at both ends are respectively attached to and pressed against the cross-section of the end wooden arch and the cross-section of the middle wooden arch.

[0010] Optionally, the cable connecting lug is inserted obliquely upward into the steel box and welded to the steel box for fixation.

[0011] Optionally, the steel insert plate is inserted into the steel box and welded to the steel box for fixation.

[0012] Optionally, the bottom end of the glued laminated wood pad block is provided with a clearance groove for avoiding the cable connection lug.

[0013] Optionally, the width of the insertion slot is two millimeters greater than the thickness of the steel insert plate, and the depth of the slot is twice the bolt diameter greater than the length of the steel insert plate.

[0014] Optionally, the axial direction of the elongated hole is parallel to the axis of the wooden arch; the diameters of the first and second circular holes are the same and one millimeter larger than the diameter of the connecting bolt; the width of the elongated hole is one millimeter larger than the diameter of the connecting bolt; and the length of the elongated hole is twice the diameter of the connecting bolt.

[0015] Optionally, the locking steel plate is a T-shaped steel plate, the bottom of which is welded to the cable connecting lug plate, and its flange plate is attached to and pressed against the side of the glued laminated wood pad.

[0016] Optionally, a steel connector is attached to one end of the end wooden arch that is away from the middle wooden arch. The steel connector is connected to the supporting steel column of the tensioned steel-wood structure via a rear-mounted steel bracket.

[0017] The cable-stayed joint of the tensioned steel-wood structure provided by this utility model has at least one of the following beneficial effects:

[0018] 1) The long oval holes on the steel insert plate and the connecting bolts provide fine-tuning space during installation, which can effectively absorb the cumulative errors in component processing and construction, and ensure that the wooden arch section and the side of the steel box are finally tightly fitted together, so as to achieve direct and efficient transmission of axial force.

[0019] 2) The method of synchronous and symmetrical installation from the mid-span to both sides is adopted, which fundamentally avoids the accumulation of errors from unilateral construction, ensures the symmetrical arrangement of the cables, and makes the structure subjected to stress in a balanced and reasonable manner.

[0020] 3) A connection assembly consisting of glued laminated timber pads, connecting bolts, and locking steel plates was designed. After adjustment, the node can be finally locked. In particular, the welding and fixing of the locking steel plates effectively prevents the steel inserts from loosening and being pulled out under the force of the cables, ensuring the long-term reliability of the node.

[0021] 4) The rear steel brackets can be processed and welded on site according to the actual layout. This ensures that the final double-layer glued laminated timber arch and cables are symmetrically installed on both sides of the mid-span, and ensures that the processing and construction errors of the whole structure can be adjusted and released at the end timber arch support.

[0022] 5) The nodes are ingeniously constructed, all components are well concealed, and the exposed parts of the wooden structure are neat and beautiful, meeting the requirements of architectural effect. Attached Figure Description

[0023] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0024] Figure 1 A schematic diagram of a single-frame tensioned steel-wood structure provided in an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the cable joint of a tensioned steel-wood structure provided in an embodiment of this utility model;

[0026] Figure 3 A partially enlarged schematic diagram of a box-type cable joint provided in an embodiment of this utility model;

[0027] Figure 4 for Figure 3 A diagram showing the installation of the locking steel plate;

[0028] Figure 5 This is a schematic diagram of a plug-in plate inserted into a plug-in slot according to an embodiment of the present invention.

[0029] The attached figures are labeled as follows:

[0030] 100 - Double-layered glued laminated timber arch; 110 - End timber arch; 120 - Middle timber arch; 121 - Insertion groove; 200 - Box-type cable joint; 210 - Steel box body; 220 - Cable connecting lug; 230 - Steel insert plate; 310 - Glulam pad; 320 - Locking steel plate; 330 - Connecting bolt; 400 - Cable; 500 - Rear steel bracket; 600 - Supporting steel column; 700 - Steel connector. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes said element. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Please refer to Figures 1-5 This utility model embodiment provides a cable joint for a tensioned steel-wood structure, comprising:

[0036] The double-layer glued laminated timber arch 100 is cut into an end timber arch 110 and a middle timber arch 120. The end of the middle timber arch 120 is provided with a splice groove 121, and the middle timber arch 120 is also provided with a number of first round holes. The first round holes penetrate vertically through the area where the splice groove 121 is opened along the thickness direction of the double-layer glued laminated timber arch 100.

[0037] The box-type cable joint 200 is embedded in the cut-off part of the double-layer glued laminated timber arch 100. The box-type cable joint 200 includes a steel box body 210 and a cable connecting ear plate 220. The cable connecting ear plate 220 is inserted into the steel box body 210 and connected to the steel box body 210. One end of the steel box body 210 is provided with several connecting steel bars, which are inserted into the end timber arch 110. The other end is provided with several steel insert plates 230, which are inserted into the insertion slots 121 of the middle timber arch 120. The steel insert plates 230 are also provided with elongated holes.

[0038] A connecting assembly is used to connect the intermediate wooden arch 120 and the box-type cable node 200. The connecting assembly includes a glued laminated timber pad 310, a locking steel plate 320 and several connecting bolts 330. The glued laminated timber pad 310 is sandwiched between the two wooden arches of the intermediate wooden arch 120, and several second round holes are opened on the glued laminated timber pad 310. The first round hole, the second round hole and the oblong hole correspond one-to-one and are connected by the connecting bolts 330. The locking steel plate 320 is fixed to the side of the intermediate wooden arch 120 away from the steel box 210.

[0039] Among them, the end faces of the steel box body 210 at both ends are respectively attached to and pressed against the cross-section of the end wooden arch 110 and the cross-section of the middle wooden arch 120.

[0040] like Figures 2-4 As shown, in this embodiment, the double-layer glued laminated timber arch 100 is cut off at the cable joint, dividing into an end timber arch 110 and an intermediate timber arch 120. Two insertion slots 121 are pre-formed at the end of the intermediate timber arch 120. Furthermore, in the area where the insertion slots 121 are formed, several first circular holes are vertically drilled through the double-layer glued laminated timber arch 100 along its thickness direction; these first circular holes are used for subsequent insertion of connecting bolts 330.

[0041] The box-type cable joint 200 is embedded at the cut-off point of the double-layer glued laminated timber arch 100, and its core is the steel box body 210. Cable connecting lugs 220 are welded and fixed to the bottom end of the steel box body 210 for connecting the cables 400. Several connecting steel bars are provided at one end of the steel box body 210 (the end connecting to the end timber arch 110). These connecting steel bars are pre-embedded inside the end timber arch 110 by rebar installation, thus prefabricating the box-type cable joint 200 and the end timber arch 110 into a single unit at the factory or on-site. Several steel insert plates 230 are welded to the other end of the steel box body 210 (the end connecting to the intermediate timber arch 120). These steel insert plates 230 are inserted into the corresponding insertion slots 121 at the end of the intermediate timber arch 120 during installation. Elongated holes are provided on the steel insert plates 230 to allow for error adjustment.

[0042] In this embodiment, the end faces of the steel box 210 at both ends must be fitted and pressed tightly against the cross-sections of the end wooden arch 110 and the middle wooden arch 120, respectively. This is the fundamental way to ensure that the tension of the cable 400 can be effectively transmitted to the wooden arch through the contact surface pressure, so that it is converted into the axial force of the wooden arch.

[0043] In some preferred embodiments, the cable connecting lug 220 is inserted obliquely upward into the steel housing 210 and welded to the steel housing 210 for fixation. The steel insert plate 230 is also inserted into the steel housing 210 and welded to it for fixation. Welded connections are strong and reliable, transmit force directly, and are easy to ensure manufacturing accuracy, making them a common and preferred method for steel structure connections.

[0044] In some preferred embodiments, such as Figure 5 As shown, the width of the slot 121 is two millimeters greater than the thickness of the steel insert plate 230. This gap provides the necessary tolerance space for the insertion of the steel insert plate 230, avoiding the inability to install due to processing errors. The depth of the slot is twice the bolt diameter greater than the length of the steel insert plate 230, which provides space for the steel insert plate 230 to move along the axis of the wooden arch in the slot to adjust its position.

[0045] The connecting assembly is used to achieve the final connection and locking between the intermediate wooden arch 120 and the box-type cable node 200. It includes a glued laminated timber pad 310, a locking steel plate 320, and several connecting bolts 330. The glued laminated timber pad 310 is sandwiched between two pieces of the intermediate wooden arch 120 and has a second circular hole, the position of which corresponds one-to-one with the first circular hole on the intermediate wooden arch 120. During installation, the connecting bolts 330 are passed sequentially through the first circular hole of one piece of the intermediate wooden arch 120, the elongated hole on one piece of the steel insert 230, the second circular hole of the glued laminated timber pad 310, the elongated hole on the other piece of the steel insert 230, and the first circular hole of the other piece of the intermediate wooden arch 120, and finally tightened with nuts. After the connecting bolts 330 are initially tightened, the locking steel plate 320 is installed on the side of the intermediate wooden arch 120 away from the steel box 210 and is pressed against the glued laminated timber pad 310.

[0046] In some preferred embodiments, to prevent interference between the glued laminated timber pad 310 and the cable connecting lug 220 at the bottom of the steel housing 210, a clearance groove is provided at the bottom end of the glued laminated timber pad 310 to avoid interference with the cable connecting lug 220. This design ensures that each component can be accurately positioned without interfering with each other. At the same time, in areas where the connecting bolt 330 conflicts with the cable connecting lug 220, an elongated hole needs to be drilled at the corresponding position on the cable connecting lug 220, that is, the connecting bolt 330 will pass through the elongated hole at the corresponding position on the cable connecting lug 220 in areas where it conflicts with the cable connecting lug 220.

[0047] In this embodiment, the axial direction of the oblong hole is parallel to the axis of the wooden arch. In some preferred embodiments, the diameters of the first and second circular holes are the same and one millimeter larger than the diameter of the connecting bolt 330; the width of the oblong hole is one millimeter larger than the diameter of the connecting bolt 330, and the length of the oblong hole is twice the diameter of the connecting bolt 330. These precise dimensional designs allow the connecting bolt 330 sufficient adjustment margin within the hole. During installation, the bolt can be partially tightened first, and the relative position of the wooden arch and the steel box 210 can be adjusted by sliding the bolt within the oblong hole until both end faces are fully abutted. Then, the bolt is finally tightened, thus achieving the function of error adjustment.

[0048] In some preferred embodiments, the locking steel plate 320 is a T-shaped steel plate, with its bottom welded to the cable connecting lug plate 220, and its flange plate abutting and pressing against the side of the glued laminated timber pad 310. This T-shaped design increases the contact area between the locking steel plate 320 and the glued laminated timber pad 310, making the lock more secure. Welding the lock is the final step, which completely eliminates the risk of loosening of the joint during use due to the gap of the elongated hole, ensuring the permanent reliability of the joint.

[0049] In some preferred embodiments, a steel connector 700 is attached to the end of the end timber arch 110 opposite to the middle timber arch 120. The steel connector 700 is connected to the supporting steel column 600 of the tensioned steel-timber structure via a post-installed steel bracket 500. The term "post-installed" here means that the steel bracket is not pre-embedded in the supporting steel column 600, but is fabricated according to the actual dimensions on site after the main nodes are installed, and then welded and fixed to the supporting steel column 600 on site. This final step can absorb and mitigate any cumulative errors that may arise from the preceding steps, ensuring that the installed double-layer glued laminated timber arch 100 and cable 400 are symmetrical on both sides of the mid-span, while also ensuring that the entire roof system can be precisely closed.

[0050] Based on the same technical concept, this utility model embodiment also provides an installation method for the cable joint of the tensioned steel-wood structure as described above, including the following steps:

[0051] S1. Connect the two box-type cable nodes 200 to the end wooden arches 110 at both ends in advance to form a whole. This step can be completed in advance in the factory or on site to ensure accuracy.

[0052] S2, 600 steel columns for construction support, and temporary support frame erected at the mid-span position;

[0053] S3. Place the middle wooden arch 120 on the temporary support frame, ensuring that the placement position is consistent with the design position;

[0054] S4. Using the midpoint of the wooden arch as the control point, simultaneously insert the steel insert plate 230 of the box-type cable node 200 of the end wooden arch 110 that has been connected at both ends into the insertion groove 121 of the middle wooden arch 120, so as to ensure that the end faces of the opposite ends of the steel box body 210 are respectively attached to and pressed against the cross-section of the end wooden arch 110 and the cross-section of the middle wooden arch 120.

[0055] S5. After the steel insert plate 230 is installed in place, place the glued laminated wood pad 310 between the two wooden arches of the intermediate wooden arch 120, and install the connecting bolts 330 to complete the connection between the intermediate wooden arch 120 and the box-type cable node 200.

[0056] S6. Install a locking steel plate 320 on the side of the intermediate wooden arch 120 that is away from the steel box 210 to complete the final locking of the cable node.

[0057] In some preferred embodiments, due to the adjustment of cable joint errors, or errors in steel column construction, frame processing and construction, the ends of the steel columns that are completed on-site cannot be precisely connected. Therefore, after the cable joints and cable-stayed outer wooden arches are installed, errors exist at the fabrication points that prevent precise connection with the supporting steel columns 600. Therefore, when the box-type cable joints 200 are pre-connected to one end of the end wooden arch 110 in the factory, a steel connector 700 can be pre-connected at the other end of the end wooden arch 110 using rebar. After the cable joints and cable-stayed outer wooden arches are installed, a rear-mounted steel bracket 500 is fabricated according to the actual on-site layout dimensions and welded and fixed on-site to the predetermined position of the supporting steel column 600 to be welded and fixed with the steel connector. This method can ensure that the installed double-layer glued laminated timber arch 100 and cable 400 are symmetrical on both sides of the mid-span, and at the same time ensure the precise installation of the entire roof.

[0058] In summary, this utility model provides a cable-stayed joint for a tensioned steel-wood structure. By creating an elongated hole in the steel insert plate connected to the intermediate wooden arch and engaging it with connecting bolts, adjustable space is provided during installation. This effectively absorbs accumulated errors during component processing and construction, ensuring a tight fit between the wooden arch cross-section and the side of the steel box for efficient axial force transmission. After adjustment and positioning, a locking steel plate is added and welded to the cable-connecting ear plate, achieving permanent anti-loosening locking of the joint and solving the potential loosening issue caused by the adjustment gap in traditional joints. Furthermore, its installation method emphasizes bidirectional synchronous symmetrical construction with the midpoint of the wooden arch as the control point, fundamentally avoiding the error accumulation and cable asymmetry problems caused by unilateral sequential construction. Thus, while ensuring reasonable and symmetrical structural stress, it achieves a balance between high-precision assembly and high reliability.

[0059] The above description is merely a description of a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model. Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the present utility model and its equivalents, the present utility model also intends to include these modifications and variations.

Claims

1. A cable-stayed joint for a tensioned steel-wood structure, characterized in that, include: A double-layer glued laminated timber arch is cut into an end arch and a middle arch. The end of the middle arch is provided with a splice groove, and the middle arch is also provided with a number of first round holes. The first round holes penetrate the area where the splice groove is opened perpendicularly along the thickness direction of the double-layer glued laminated timber arch. A box-type cable joint is embedded at the cut-off point of the double-layer glued laminated timber arch. The box-type cable joint includes a steel box body and cable connecting lugs. The cable connecting lugs are inserted into the steel box body and connected to the steel box body. One end of the steel box body is provided with several connecting steel bars, which are implanted into the end timber arch. The other end is provided with several steel insert plates, which are inserted into the insertion slots of the middle timber arch. The steel insert plates are also provided with elongated holes. A connecting assembly is used to connect the intermediate wooden arch and the box-type cable node. The connecting assembly includes a glued laminated timber pad, a locking steel plate and several connecting bolts. The glued laminated timber pad is sandwiched between the two wooden arches of the intermediate wooden arch, and several second round holes are opened on the glued laminated timber pad. The first round hole, the second round hole and the oblong hole correspond one-to-one and are connected by the connecting bolts. The locking steel plate is fixed to the side of the intermediate wooden arch away from the steel box body. The end faces of the steel box body at both ends are respectively attached to and pressed against the cross-section of the end wooden arch and the cross-section of the middle wooden arch.

2. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The cable connecting lug is inserted obliquely upward into the steel box and welded and fixed to the steel box.

3. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The steel insert plate is inserted into the steel box and welded to the steel box for fixation.

4. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The bottom end of the glued laminated wood pad has a clearance groove for avoiding the cable connection lug.

5. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The width of the insertion slot is two millimeters greater than the thickness of the steel insert plate, and the depth of the slot is twice the bolt diameter greater than the length of the steel insert plate.

6. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The axial direction of the oblong hole is parallel to the axis of the wooden arch. The diameters of the first and second circular holes are the same and are one millimeter larger than the diameter of the connecting bolt. The width of the oblong hole is one millimeter larger than the diameter of the connecting bolt, and the length of the oblong hole is twice the diameter of the connecting bolt.

7. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, The locking steel plate is a T-shaped steel plate, the bottom of which is welded to the cable connecting lug plate, and its flange plate is attached to and pressed against the side of the glued laminated wood pad block.

8. The cable-stayed joint of a tensioned steel-wood structure according to claim 1, characterized in that, A steel connector is attached to one end of the end wooden arch that is away from the middle wooden arch. The steel connector is connected to the supporting steel column of the tensioned steel-wood structure through a rear-mounted steel bracket.

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