Steel-wood composite structure system

Abstract

This invention relates to the field of building structure design technology, and more particularly to a steel-wood composite structural system, comprising at least one single steel-wood composite truss. The single steel-wood composite truss includes supporting columns, a wooden arch beam, cables, a steel top chord of the composite truss, steel web members of the composite truss, and several struts. Two supporting columns are respectively located at both ends of the wooden arch beam. The two ends of the cables are respectively connected to both ends of the wooden arch beam. The struts are arranged vertically and their two ends are respectively connected to the wooden arch beam and the cables. The two ends of the steel top chord of the composite truss are respectively connected to the tops of the two supporting columns. The two ends of the steel web members of the composite truss are respectively connected to the steel top chord of the composite truss and the wooden arch beam. The steel-wood composite structural system provided by this invention can be used for large-span roof structures, fully utilizing the characteristics of the materials, resulting in a low structural self-weight, allowing for increased spans, while significantly reducing material usage and lowering carbon emissions from the building structure, demonstrating significant economic advantages.

Description

Technical Field

[0001] This invention relates to the field of building structure design technology, and in particular to a steel-wood composite structure system. Background Technology

[0002] In traditional structures, stiffness is derived primarily from geometry and materials; such structures are known as rigid structures. Tensioned structures, on the other hand, are semi-rigid structural systems primarily composed of tension members (such as cables and rods) or a combination of tension and compression members, maintaining their shape and stiffness through tension. The inherent stiffness of a semi-rigid tensioned structure cannot maintain a stable initial state; its initial stability must be ensured by the geometric stiffness provided by prestress or passive tension.

[0003] Traditional structures often use steel components for installation, resulting in large material consumption and heavy weight for large-span structures, leading to low economic efficiency. In contrast, wood structures are lightweight, have good insulation, and do not accumulate condensation. In special environments such as greenhouses and speed skating rinks, where there are large temperature differences between indoors and outdoors, and humidity levels, wood structures offer significant advantages. Furthermore, green and low-carbon development is a prevailing trend and concept, aligning with wood structure architecture. In certain specific scenarios, the unique architectural effects of wood structures are recognized by architects. Wood structures also offer good seismic performance, high prefabrication rates, and fast construction and installation, with carbon emissions far lower than steel structures. Moreover, wood structures do not require anti-corrosion coatings. Therefore, it is essential to rationally combine wood and steel structures to form a steel-wood composite structural system. Summary of the Invention

[0004] The purpose of this invention is to provide a steel-wood composite structure system that can fully utilize the characteristics of the materials, has a small structural weight, allows for increased span, and at the same time significantly reduces material usage, lowers carbon emissions from building structures, and has obvious economic advantages.

[0005] To achieve the above objectives, the present invention provides a steel-wood composite structure system, comprising at least one single steel-wood composite truss. The single steel-wood composite truss includes support columns, wooden arch beams, cables, a composite truss steel top chord, a composite truss steel web member, and several struts. There are two support columns, which are respectively located at both ends of the wooden arch beam. The two ends of the cables are respectively connected to the two ends of the wooden arch beam. The struts are arranged vertically and their two ends are respectively connected to the wooden arch beam and the cables. The two ends of the composite truss steel top chord are respectively connected to the top ends of the two support columns. The two ends of the composite truss steel web member are respectively connected to the composite truss steel top chord and the wooden arch beam.

[0006] Optionally, the wooden arch beam consists of two single arch beams placed side by side, and the two single arch beams are connected by a connector.

[0007] Optionally, the strut is positioned between the two single arch beams, with one end of the strut hinged to the connector and the other end rigidly connected to the cable clamp on the cable.

[0008] Optionally, the struts are multiple and arranged at equal intervals along the span direction of the wooden arch beam.

[0009] Optionally, one end of the composite truss steel web member is hinged to the wooden arch beam, and the other end is rigidly connected to the composite truss steel top chord.

[0010] Optionally, the two ends of the wooden arch beam are respectively hinged to the two supporting columns, and the two ends of the combined truss steel upper chord are respectively rigidly connected to the two supporting columns, and the hinge point between the wooden arch beam and the supporting columns is located below the rigid connection point between the combined truss steel upper chord and the supporting columns.

[0011] Optionally, the two ends of the cable are hinged to the wooden arch beam via pins and ear plates, respectively, and a preload is applied to the cable.

[0012] Optionally, the single steel-wood composite truss is made up of multiple trusses arranged in parallel along the span direction perpendicular to the wooden arch beam. The steel-wood composite structure system also includes a column top upper chord, a column top lower chord, and a column top web member. The column top upper chord is located above the column top lower chord, and the column top upper chord and the column top lower chord are respectively connected to the support columns of the adjacent single steel-wood composite truss to form a truss structure.

[0013] Optionally, several secondary wooden beams are arranged between the wooden arch beams of adjacent single steel-wood composite trusses, and the secondary wooden beams are hinged to the wooden arch beams. Steel secondary beams are arranged between the steel upper chords of the composite trusses of adjacent single steel-wood composite trusses, and the steel secondary beams are hinged to the steel upper chords of the composite trusses.

[0014] Optionally, in-plane bracing is arranged between the steel top chord and steel secondary beam of at least some of the adjacent single steel-wood composite trusses.

[0015] The steel-wood composite structure system provided by this invention has at least one of the following beneficial effects:

[0016] 1) Since the wooden arch beam generates horizontal thrust, and the supporting columns on both sides extend to the top of the steel upper chord of the composite truss, the steel upper chord of the composite truss is subjected to tension to resist the horizontal thrust, and the cable bears a large tensile force to resist the tensile force generated by the structure under vertical load. Thus, a steel-wood composite structural system is formed in which the cable and the steel upper chord of the composite truss are subjected to force, and the wooden arch beam is subjected to compression. This steel-wood composite structural system can make full use of the material characteristics, has a small structural self-weight, can increase the span, and can greatly reduce the amount of material used, with obvious economic advantages.

[0017] 2) By replicating and extending the single steel-wood composite truss, and connecting each composite truss with secondary beams to form the entire roof structure, the structural system can give full play to the advantages of high-strength cables and the excellent compressive strength of wooden arch materials;

[0018] 3) By connecting the cable connection point directly to the end of the wooden arch beam instead of the hinge point, the interior clear height can be saved and the overall building height can be reduced;

[0019] 4) The steel-wood composite structure system provided by this invention can be used for large-span roof structures. It has the characteristics of high strength-to-weight ratio, light weight, good seismic performance, high degree of assembly, and low carbon materials, which are consistent with the stress characteristics of large-span structures. At the same time, it has the properties of being lightweight and transparent in large-span structures. Attached Figure Description

[0020] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0021] Figure 1 This is a single-frame elevation view of a steel-wood composite structural system provided in an embodiment of the present invention;

[0022] Figure 2 This is an isometric view of a steel-wood composite structure system provided in an embodiment of the present invention;

[0023] Figure 3 This is a top view of the cable clamp node of a steel-wood composite structural system provided in an embodiment of the present invention;

[0024] Figure 4 An elevation view of a cable clamp node in a steel-wood composite structural system according to an embodiment of the present invention;

[0025] Figure 5 A side view of a steel-wood composite structure system provided in an embodiment of the present invention;

[0026] Figure 6 This is a top view of a secondary wooden beam provided in an embodiment of the present invention;

[0027] Figure 7This is a partially enlarged view of a steel-wood composite structure system provided in an embodiment of the present invention;

[0028] Figure 8 A top view of a steel-wood composite structure system provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the installation of a steel-wood composite structure system provided in an embodiment of the present invention.

[0030] in:

[0031] 100-Single steel-wood composite truss; 101-Support column; 102-Wooden arch beam; 103-Cable; 104-Steel top chord of composite truss; 105-Steel web member of composite truss; 106-Strut; 107-Wooden secondary beam; 108-In-plane bracing; 200-Column top top chord; 201-Column top bottom chord; 202-Column top web member; 203-Steel secondary beam. Detailed Implementation

[0032] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clarify the illustration of the embodiments of this invention, and are not intended to limit the conditions for implementing this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0033] It should also be understood that, unless otherwise specified or indicated, the terms "first," "second," "third," etc., in the specification are used only to distinguish the various components, elements, steps, etc., in the specification, and not to indicate the logical or sequential relationships between the various components, elements, steps, etc. Furthermore, 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 process, method, article, or apparatus. Unless otherwise limited, an element defined by the phrase "comprising one…" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] Please refer to Figure 1 and Figure 2This embodiment provides a steel-wood composite structure system, including at least one single steel-wood composite truss 100. The single steel-wood composite truss 100 includes support columns 101, wooden arch beams 102, cables 103, composite truss steel upper chord members 104, composite truss steel web members 105, and several struts 106. There are two support columns 101, which are respectively located at both ends of the wooden arch beam 102. The two ends of the cables 103 are respectively connected to the two ends of the wooden arch beam 102. The struts 106 are arranged vertically and their two ends are respectively connected to the wooden arch beam 102 and the cables 103. The two ends of the composite truss steel upper chord members 104 are respectively connected to the top ends of the two support columns 101. The two ends of the composite truss steel web members 105 are respectively connected to the composite truss steel upper chord members 104 and the wooden arch beam 102.

[0035] Since the wooden arch beam 102 generates horizontal thrust, and the supporting columns 101 on both sides extend to the top of the combined truss steel upper chord 104, the combined truss steel upper chord 104 is subjected to tension to resist the horizontal thrust, and the cable 103 bears a large tensile force to resist the tensile force generated by the structure under vertical load. Thus, a steel-wood composite structure system is formed in which the cable 103 and the combined truss steel upper chord 104 are stressed, and the wooden arch beam 102 is compressed. This steel-wood composite structure system can make full use of the material characteristics, has a small structural self-weight, can increase the span, and can greatly reduce the amount of material used, with obvious economic advantages.

[0036] Specifically, the wooden arch beam 102 can serve as the lower chord of the single steel-wood composite truss 100. The curve of the wooden arch beam 102 can be an inverted catenary or a quadratic curve. The steel upper chord 104 and the steel web members 105 of the composite truss are both steel components to form a steel-wood composite truss. The lower part is provided with the cable 103, and the cable 103 and the upper steel-wood composite truss are connected by the strut 106 to form a tensioned steel-wood composite truss structural system. In this embodiment, the two ends of the wooden arch beam 102 are respectively hinged to the two support columns 101, and the two ends of the steel upper chord 104 of the composite truss are respectively rigidly connected to the two support columns 101. The hinge point between the wooden arch beam 102 and the support column 101 is located below the rigid connection point between the steel upper chord 104 and the support column 101. In other words, the support column 101 does not break at the hinge point of the wooden arch beam 102, but continues to the upper chord of the combined truss steel 104, and the top of the support column 101 is rigidly connected to the upper chord of the combined truss steel 104.

[0037] Preferably, the wooden arch beam 102 consists of at least two single arch beams placed side by side; however, this invention does not impose any limitation on this. In this embodiment, as... Figure 3As shown, the wooden arch beam 102 consists of two single arch beams placed side by side and working together, connected by connectors. The combined truss steel upper chord 104 and the combined truss steel web members 105 can be single members or correspond to the number of single arch beams; the present invention does not impose any restrictions on this.

[0038] In this embodiment, the connector includes, but is not limited to, structural steel. The connector is erected between two single arch beams.

[0039] Preferably, the wooden arch beam 102 is made of glued laminated timber. Glulam structures have the characteristics of high strength-to-weight ratio, light weight, good seismic performance, high degree of assembly, and low carbon content, which are consistent with the stress characteristics of large-span structures.

[0040] In this embodiment, the support rod 106 is disposed between the two single arch beams, which can be understood as the projection of the support rod 106 in the vertical plane being within the range of the projection of the single arch beam in the vertical plane. One end of the support rod 106 is hinged to the connector, and the other end is rigidly connected to the cable clamp on the cable 103. Preferably, there are multiple support rods 106, which are arranged at equal intervals along the span direction of the wooden arch beam 102.

[0041] For preferred options, please refer to [the provided text]. Figure 3 and Figure 4 The two ends of the cable 103 are hinged to the wooden arch beam 102 via pins and ear plates, respectively, and a preload is applied to the cable 103. In this embodiment, the cable 103 is in the shape of a catenary or a quadratic curve, and the two ends of the cable 103 are hinged to the connecting members sandwiched inside the wooden arch beam 102, and the cable 103 is coplanar with the support rod 106.

[0042] In this embodiment, the end of the cable 103 can be directly connected to the end of the wooden arch beam 102, or it can be connected to the hinge point between the wooden arch beam 102 and the support column 101. This invention does not impose any limitations on this. The end of the wooden arch beam 102 should be understood as the area near the hinge point between the wooden arch beam 102 and the support column 101. To save interior ceiling height and reduce the overall building height, the connection point of the cable 103 can be directly connected to the end of the wooden arch beam 102 instead of the hinge point.

[0043] In this embodiment, one end of the combined truss steel web member 105 is hinged to the wooden arch beam 102, and the other end is rigidly connected to the combined truss steel top chord member 104. After being reliably connected to the two individual arch beams, the connecting member is hinged to the bottom end of the combined truss steel web member 105. The combined truss steel top chord member 104 can be a wide, flat cross-section member, or it can be arranged corresponding to the number of web members; this invention does not impose any limitations in this regard.

[0044] In this embodiment, the cable 103, the strut 106, the composite truss steel web member 105, and the composite truss steel top chord member 104 are coplanar.

[0045] In this embodiment, the support column 101 is a steel column. Depending on stiffness requirements, the base of one side of the support column 101 must be rigidly connected or have a structure that provides reliable lateral stiffness. The base of the other side can be either rigidly connected or fixedly hinged. The support column 101 can have a closed or open cross-section as needed, and can be filled with concrete.

[0046] Please refer to Figure 1 and Figure 5 The single steel-wood composite truss 100 consists of multiple trusses arranged parallel to each other along the span direction perpendicular to the wooden arch beam 102. The steel-wood composite structure system also includes a column top upper chord 200, a column top lower chord 201, and a column top web member 202. The column top upper chord 200 is located above the column top lower chord 201, and the column top upper chord 200 and the column top lower chord 201 are respectively connected to the support column 101 of the adjacent single steel-wood composite truss 100 to form a truss structure, thereby improving the longitudinal stiffness of the overall structure.

[0047] For further details, please refer to Figure 6 and Figure 7 Several secondary wooden beams 107 are arranged between the wooden arch beams 102 of adjacent single steel-wood composite trusses 100, and the secondary wooden beams 107 are hinged to the wooden arch beams 102. A secondary steel beam 203 is arranged between the combined truss steel upper chord members 104 of adjacent single steel-wood composite trusses 100, and the secondary steel beam 203 is hinged to the combined truss steel upper chord member 104.

[0048] In this embodiment, the single steel-wood composite truss 100 can be replicated at certain intervals to form the entire roof structure. The steel upper chord 104 of the composite truss between two composite trusses can be arranged with the steel secondary beam 203 according to the lateral support and roof requirements. The wooden secondary beam 107 can be arranged at the position of the wooden arch beam 102.

[0049] Please refer to Figure 8 In-plane supports 108 are arranged between the upper steel chord 104 and the secondary steel beam 203 of the combined truss 100, which are at least partially adjacent to each other, to improve the rigidity and integrity of the roof structure.

[0050] Please refer to Figure 9 and combined Figures 1-8 The installation method of the steel-wood composite structure system provided in this embodiment of the invention is roughly as follows:

[0051] S1. First, install the support columns 101 on both sides. The bottom of one column must be rigidly connected or connected to a structure that can provide reliable lateral stiffness. The bottom of the other column can be rigidly connected or fixedly hinged. Temporary supports are used to ensure the stiffness and accurate positioning of the support column 101. Then, install a section of wooden arch beam 102 and steel truss outside the cable 103 at the top of the support columns 101 on both sides, and temporarily fix them.

[0052] S2. The combined truss steel web members 105 are pre-connected to the wooden arch beam 102 and the combined truss steel upper chord members 104. The lower part is provided with the cable 103. Considering the complexity of construction tensioning, form-finding analysis under dead load is required. The pre-arching of the steel truss combined structure is achieved by controlling the initial pretension (initial length) of the cable 103. At the same time, considering that the cable 103 is not pulled to the top of the columns on both sides, the cable 103 is connected to the wooden arch beam 102, which is more complicated than the conventional tensioned beam form construction. This embodiment proposes that the upper wooden arch beam 102 and steel truss are disconnected at the connection point of the cable 103 on both sides. The middle tensioned structure can be tensioned and the cable is hung on the ground. At this time, due to the pretension of the cable 103, the middle tensioned structure will inevitably arch upward to form a self-balancing structure in which the cable 103 is under tension and the wooden arch beam 102 and the steel truss are under compression. At this time, the structure only bears its own weight.

[0053] S3. Simultaneously lift both sides of the central tensioned structure to the cantilever ends on both sides, accurately position them, connect the wooden arch beam 102 and the combined truss steel web member 105, and after the connection is completed, a single steel-wood combined truss 100 is formed, and the installed single steel-wood combined truss 100 is temporarily fixed to prevent the structure from overturning, deforming, etc.

[0054] S4. Install adjacent single steel-wood composite trusses 100 sequentially according to the above method. After installation, install the wooden secondary beams 107, the steel secondary beams 203, and the in-plane supports 108, etc., to gradually complete the construction and installation of the roof structure. After the main structure is installed, install the metal roofing system. Before installation, a construction process simulation analysis needs to be performed to determine the prestress magnitude and the initial geometric length of the cable 103 before hanging the cables on the ground, ensuring the pre-camber amount and ensuring that the wooden arch beam 102 returns to its initial geometric position after the roof system is installed. At this time, the cable 103 is under tension, and the wooden arch beam 102 and the entire steel truss composite structure are under compression. In actual use, the structure undergoes lateral displacement under horizontal loads such as wind loads and earthquakes. All horizontal forces are borne by the support columns 101 on both sides. After deformation, the roof structure undergoes internal force redistribution. The internal force of the cable 103 increases or decreases, but it is always under tension. The steel upper chord 104 of the composite truss may be under tension or compression, but the wooden arch beam 102 is always under compression, only the magnitude of the pressure changes. The support columns 101 on both sides bear the vertical force, bending moment, shear force, etc. in the column top area.

[0055] The longitudinal horizontal force transmission of the overall structure mainly relies on the longitudinal steel truss structure at the top of the column. No inter-column bracing is required between the columns. All horizontal forces are borne by the supporting columns 101 on both sides. In-plane bracing 108 is set on the upper chord of the roof to ensure the integrity of the entire roof and the transmission of longitudinal horizontal forces.

[0056] In summary, this embodiment of the invention provides a steel-wood composite structural system. Since the wooden arch beam 102 generates horizontal thrust, and the supporting columns 101 on both sides extend to the top of the composite truss steel upper chord 104, the composite truss steel upper chord 104 is subjected to tension to resist the horizontal thrust. The cable 103 bears a large tensile force to resist the tensile force generated by the structure under vertical loads. This forms a steel-wood composite structural system where the cable 103 and the composite truss steel upper chord 104 are stressed, and the wooden arch beam 102 is compressed. This steel-wood composite structural system can fully utilize the characteristics of the materials, has a small structural weight, can increase the span, and can significantly reduce material usage, resulting in significant economic advantages.

[0057] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A steel-wood composite structural system, characterized in that, The system includes at least one single steel-wood composite truss, which comprises support columns, wooden arch beams, cables, a composite truss steel top chord, a composite truss steel web member, and several struts. There are two support columns, which are respectively located at both ends of the wooden arch beam. The two ends of the cables are respectively connected to both ends of the wooden arch beam. The struts are arranged vertically and their two ends are respectively connected to the wooden arch beam and the cables. The two ends of the composite truss steel top chord are respectively connected to the tops of the two support columns. The two ends of the composite truss steel web member are respectively connected to the composite truss steel top chord and the wooden arch beam. Wherein, one end of the steel web member of the truss is hinged to the wooden arch beam, and the other end is rigidly connected to the steel upper chord of the composite truss; both ends of the wooden arch beam are respectively hinged to the two supporting columns, and both ends of the steel upper chord of the composite truss are respectively rigidly connected to the two supporting columns, and the hinge point between the wooden arch beam and the supporting column is located below the rigid connection point between the steel upper chord of the composite truss and the supporting column.

2. The steel-wood composite structure system according to claim 1, characterized in that, The wooden arch beam consists of two single arch beams placed side by side, and the two single arch beams are connected by connectors.

3. The steel-wood composite structure system according to claim 2, characterized in that, The strut is positioned between the two single arch beams, with one end of the strut hinged to the connector and the other end rigidly connected to the cable clamp on the cable.

4. The steel-wood composite structure system according to claim 1 or 3, characterized in that, The struts are multiple and are arranged at equal intervals along the span direction of the wooden arch beam.

5. The steel-wood composite structure system according to claim 1, characterized in that, The two ends of the cable are hinged to the wooden arch beam via pins and ear plates, respectively, and a preload is applied to the cable.

6. The steel-wood composite structure system according to claim 1, characterized in that, The single steel-wood composite truss consists of multiple members arranged parallel to each other along the span direction perpendicular to the wooden arch beam. The steel-wood composite structure system also includes a column top upper chord, a column top lower chord, and a column top web member. The column top upper chord is located above the column top lower chord, and the column top upper chord and the column top lower chord are respectively connected to the support columns of the adjacent single steel-wood composite truss to form a truss structure.

7. The steel-wood composite structure system according to claim 6, characterized in that, Several secondary wooden beams are arranged between the wooden arch beams of adjacent single steel-wood composite trusses, and the secondary wooden beams are hinged to the wooden arch beams. Steel secondary beams are arranged between the steel upper chords of the composite trusses of adjacent single steel-wood composite trusses, and the steel secondary beams are hinged to the steel upper chords of the composite trusses.

8. The steel-wood composite structure system according to claim 7, characterized in that, At least some of the adjacent steel-wood composite trusses have in-plane supports arranged between the steel top chord and the steel secondary beams of the composite truss.

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