Core tube flange bolt connection modularized fully-assembled truss string structure system and assembling method

Abstract

The invention discloses a core tube flange bolt connection modularized full-assembly truss string structure system and an assembly method, and belongs to the field of structural engineering. The system mainly comprises modular assembly type trusses, cable support systems and connecting nodes. By the adoption of the ball rod module designed in a standardized mode, field assembly is carried out through core cylinder flange bolts, a traditional welding technology is replaced, and full assembly, detachability and repairability of the structure are achieved. The problem that due to the fact that the structural span is increased, the rod piece in the upper structure is too long, the pressing rod is unstable is effectively solved, and span increasing is achieved. The design has the advantages of being high in modularization, convenient to construct, environmentally friendly and the like, the construction efficiency and the engineering quality are remarkably improved, the influence on the environment is reduced, and the method is suitable for intelligent construction and industrial application of a large-span space structure.

Description

Technical Field

[0001] This invention relates to the field of prefabricated large-span spatial structures, and more specifically, to a modular, fully assembled tensioned truss structure system with core tube flange bolt connection and assembly method. Background Technology

[0002] Large-span spatial structure systems and their major engineering applications are important indicators of a nation's modernization level in the construction industry and its overall national strength. With the rapid development of the national economy and the continuous advancement of building technology, the demand for spatial spans in large public buildings such as stadiums, convention centers, and airport terminals is increasing, driving continuous innovation in large-span spatial structure technology. Tensioned truss structures, as a highly efficient structural form combining rigidity and flexibility, cleverly combine the bending stiffness of the upper rigid truss with the tensile strength of the lower flexible cable-stayed system. They possess outstanding advantages such as a clear force transmission path, high material utilization, and a simple and aesthetically pleasing structural form. Therefore, they have been widely used in practical engineering, especially in the field of large-span spatial structures.

[0003] However, existing tensioned truss structure technology is gradually revealing its limitations when facing the challenge of larger spans. Firstly, as the structural span increases, the length of each truss segment in the superstructure inevitably increases. Under complex loading conditions, excessively long truss segments cause the stress mode to shift from the design-desired axial force-dominated to bending moment-dominated. This shift significantly reduces the overall structural performance and easily leads to member instability, thus becoming a key bottleneck restricting further increases in structural span. Secondly, in existing examples of large-span spatial steel structures, the connection and assembly of the structure are almost entirely based on on-site welding. This traditional construction method not only causes severe pollution and high carbon emissions but also results in the structure being non-disassembleable and non-reusable, which is incompatible with the current national strategy of promoting green building and industrialized construction. Simultaneously, the struts in existing prestressed cable-stayed structures often do not consider the distribution patterns of prefabricated main nodes, failing to provide the most effective support for each truss segment, further affecting the structural efficiency.

[0004] To overcome the aforementioned shortcomings, modular assembly technology has emerged as a highly promising solution. Modular assembly is a highly efficient form of prefabricated construction, its core being the industrial production of building components in factories, followed by rapid on-site assembly. Modular assembly integrates numerous scattered components into a few large modules, significantly reducing the number of on-site assembly nodes. This not only greatly improves construction efficiency but also reduces the types and quantities of assembly units, facilitating quality control and management. Furthermore, modular units are processed in factories, leveraging the precision equipment and stable environment to significantly improve product quality and effectively reduce initial structural defects caused by on-site installation errors. However, large-span tensioned truss structures are complex, and existing modular research remains insufficient. There is an urgent need to develop a new modular assembly system that can adapt to intelligent construction concepts, achieve efficient assembly, and improve structural performance. Summary of the Invention

[0005] The present invention aims to provide a modular, fully assembled tensioned truss structure system and assembly method with core tube flange bolt connection, in order to solve the technical problems existing in the prior art, such as large welding pollution, low assembly efficiency, insufficient modularity, and instability of large-span compression members.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0007] A modular, fully assembled tensioned truss structure system with core tube flange bolt connection, comprising: Transverse space trusses, longitudinal space trusses, edge trusses, cable-stayed systems, and modular connection nodes for space trusses; The transverse space truss and the longitudinal space truss are modularly spliced ​​together through the modular connection nodes of the space truss. The cable-stayed system is arranged below the transverse space truss, and the struts in the cable-stayed system are located directly below the modular connection nodes of the space truss. The side trusses are arranged on the left and right sides of the transverse spatial truss; The modular connection node of the space truss includes a hollow sphere, node connectors, flanges, circular core cylinders, core cylinder bolts, flange bolts, and truss members; The node connector is welded to the hollow sphere, and the flange is welded to the node connector and the truss member; The circular core is inserted into the interior of the node connector and the truss member. The core bolt passes through the circular core to connect the node connector and the truss member. The flange bolt connects the flange on the node connector and the truss member.

[0008] Furthermore, the transverse space truss includes the space truss modular connection node and the transverse space truss module unit; the longitudinal space truss includes the space truss modular connection node and the longitudinal space truss module unit.

[0009] Furthermore, both the transverse space truss module unit and the longitudinal space truss module unit are composed of two upper chords and one lower chord, forming an inverted triangular cross-sectional structure; The upper chord and the lower chord are connected by a web member, and the connection points between the upper chord and the web member, and between the lower chord and the web member, respectively form upper chord nodes and lower chord nodes.

[0010] Furthermore, the upper and lower chords of both the transverse space truss module unit and the longitudinal space truss module unit are welded with the flanges.

[0011] Furthermore, the other end of the node connector, to which the flange is welded at one end, is welded to the hollow sphere for connecting the chord of the space truss module unit; The node connectors without welded flanges are welded to the hollow sphere for connecting the web members of the space truss module unit; The node connector with the flange is connected to the chord with the flange via the core bolt, the flange bolt, and the circular core. The web member is connected to the node connector by bolts and the circular core cylinder.

[0012] Furthermore, each of the transverse space trusses is arranged longitudinally in sequence, and the longitudinal space truss module unit is vertically connected to it.

[0013] Furthermore, the transverse space truss is composed of n transverse space truss module units, where n is a natural number.

[0014] Furthermore, the modular fully assembled tensioned truss structure system with core tube flange bolt connection is assembled from m transverse space trusses, (n-1)(m-1) longitudinal space truss module units, and 2(m-1) side trusses, where m is a natural number.

[0015] Furthermore, the cable support system consists of horizontal cables, diagonal cables, and the support rods; The inclined cable connects the main node adjacent to the strut and the bottom of the strut; The horizontal cable is connected between two adjacent struts.

[0016] Furthermore, the curvature during the assembly process is adjusted by the modular connection nodes of the space truss. Based on the height-to-span ratio of the structure, the angle between the node connector and the welded hollow sphere is determined to adapt to the curved surface shape of the entire space truss structure.

[0017] Furthermore, the flange is welded perpendicularly to the central axis of the node connector or the truss member; the thickness of the flange is greater than the thickness of the member to which it is welded.

[0018] Furthermore, the arrangement of the cable-stayed system is selected based on the shape and stress requirements of the upper transverse spatial truss, with the cable-stayed system arranged in the middle.

[0019] Furthermore, the base number of the transverse space truss module unit is n, and the specific value of n is determined according to the curvature and span of the structure; the transverse space truss assembled from n transverse space truss module units is a longitudinal assembly unit with a base number of m, and the specific value of m is determined according to the length of the structure.

[0020] On the other hand, this application also claims protection for an assembly method of a modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described above, comprising the following steps: Step 1: Prefabricate all transverse space truss module units, longitudinal space truss module units, side trusses, and modular connection nodes of the space truss in the factory; during the prefabrication process, weld the node connectors to the hollow spheres, weld the flanges to the ends of the node connectors and the ends of the truss members, and package the circular core tubes, core tube bolts, and flange bolts according to specifications; at the same time, complete the fixed-length cutting of the struts, horizontal cables, and diagonal cables in the cable-stayed system and the installation of the end anchors in the factory; Step 2: Transport all prefabricated components to the construction site and install temporary support frames according to the design drawings; Step 3: Starting from one end, install the transverse space trusses one by one: splice the transverse space truss module units through the space truss modular connection nodes. At each node, first insert the circular core cylinder into the node connector and truss member, then insert the core cylinder bolt and tighten it, and finally pass the flange bolt through the flange and tighten it. Step 4: After completing the installation of all transverse space trusses, install the longitudinal space truss module units and connect their two ends to the corresponding space truss modular connection nodes on the adjacent transverse space trusses. Step 5: Install the side trusses; Step Six: After the upper truss structure is fully assembled, install the cable support system below the transverse space truss: fix the top of the support rod directly below the modular connection node of the space truss with bolts, connect the horizontal and diagonal cables according to the design position, and finally apply prestress to the design value.

[0021] Compared with the prior art, the present invention achieves the following beneficial technical effects: The modular, fully assembled tensioned truss structure system with core tube flange bolt connection provided by this invention combines upper rigid compression-bending members with lower flexible cable supports, and rationally arranges the cable supports to form a highly efficient self-balancing system. This fully utilizes the stress characteristics of rigid-flexible structures and exhibits extremely superior stress performance. A prestressed cable system with struts is arranged at the lower part of the transverse spatial truss, with the struts precisely positioned directly below the assembly points of the transverse spatial truss, i.e., the modular connection nodes of the spatial truss. Prestressed cables connect the struts and adjacent main nodes on both sides. This structural system, through modular assembly, realizes the transformation from industrialized factory production to efficient on-site assembly, significantly reducing the types and number of assembly units and lowering carbon emissions during construction. The entire structural system is detachable and replaceable, facilitating later maintenance and repair, and significantly enhancing the sustainability of the building. This invention meets the requirements of intelligent construction for modular assembly, providing a modern large-span spatial steel structure solution integrating informatization, intelligence, and green technology. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the assembly structure of a core-tube flange bolt-connected modular fully assembled tensioned truss structure system according to a preferred embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the assembly structure of a core-tube flange bolt-connected modular fully assembled tensioned truss structure system according to a preferred embodiment of the present invention. Figure 2 ; Figure 3 A schematic diagram of the structure of a modular connection node group according to a preferred embodiment of the present invention; Figure 4 A top view of a modular connection node group according to a preferred embodiment of the present invention; Figure 5 A front view of the modular connection node group according to a preferred embodiment of the present invention; Figure 6 A schematic diagram of a single-root connection node structure according to a preferred embodiment of the present invention; Figure 7A top view of a single connecting node according to a preferred embodiment of the present invention; Figure 8 A front view of a single connecting node according to a preferred embodiment of the present invention; Figure 9 A schematic diagram of a single transverse space truss assembly according to a preferred embodiment of the present invention; Figure 10 A schematic diagram of the assembly of a transverse space truss and a longitudinal space truss according to a preferred embodiment of the present invention; Figure 11 A schematic diagram of a modular assembly of a space truss according to a preferred embodiment of the present invention; Figure 12 A schematic diagram of a cable-stayed system according to a preferred embodiment of the present invention.

[0024] Among them, there are: transverse space truss 10, longitudinal space truss 20, side truss 30, cable bracing system 40, space truss modular connection node 50, transverse space truss module unit 60, longitudinal space truss module unit 70, horizontal cable 400, diagonal cable 401, strut 402, hollow sphere 500, node connector 501, flange 502, circular core cylinder 503, core cylinder bolt 504, flange bolt 505, and truss member 506. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The following is in conjunction with the appendix Figure 1 To be continued Figure 12 This paper provides a detailed description of the specific implementation of a modular, fully assembled tensioned truss structure system with core tube flange bolt connection, in order to clearly present the connection relationship and assembly logic of each component, and to ensure that those skilled in the art can accurately understand and implement this solution.

[0027] In one embodiment of this application, a novel modular assembly system for a tensioned truss structure with core-tube flange bolt connection is provided. For example... Figure 1 , Figure 2 and Figure 10As shown, the system mainly consists of five core components: transverse space trusses 10, longitudinal space trusses 20, side trusses 30, cable-stayed system 40, and modular connection nodes for the space trusses 50. These five parts work together to form a complete, stable, and efficient large-span spatial structure system.

[0028] Specifically, the transverse space truss 10, as the main load-bearing component of the superstructure, undertakes the core task of transferring the roof load to the lower support system. The transverse space truss 10 and the longitudinal space truss 20 intersect perpendicularly in space, and their connection point forms the main node of the structure. The transverse space truss 10 and the longitudinal space truss 20 are modularly spliced ​​together through space truss modular connection nodes 50. This connection method abandons traditional on-site welding processes, using bolts for all fastenings, enabling the structure to not only assemble quickly but also possess disassembly and repairability. The longitudinal space truss 20 and the side trusses 30 are positioned vertically to the transverse space truss 10, i.e., on its left and right sides. This arrangement provides reliable lateral constraints for the transverse space truss 10, effectively limiting its out-of-plane deformation and significantly improving the overall structural stability. Furthermore, they collaboratively participate in load-bearing, further enhancing the overall load-bearing capacity of the structure.

[0029] The cable-stayed system 40, as the lower flexible support subsystem, is arranged entirely below the transverse spatial truss 10. Crucially, the struts 402 in the cable-stayed system 40 are not randomly placed, but precisely positioned directly below the modular connection nodes 50 of the spatial truss. This one-to-one spatial relationship between nodes and struts ensures that each modular connection node not only serves as a member connection point for the upper truss but also as a force transmission fulcrum for the lower cable-stayed system, achieving a high degree of unity between the modular unit and the force-bearing unit. When the strut 402 transmits the supporting force from the cable-stayed system 40 upwards, the force acts directly on the connection node 50, and then is distributed to adjacent truss members through the node. The force transmission path is clear and unambiguous, avoiding the generation of additional bending moments.

[0030] like Figures 3 to 8 As shown, the modular connection node 50 of the space truss is the core component for realizing the aforementioned modular assembly and efficient force transmission. This node is an assembly mainly composed of a hollow sphere 500, a node connector 501, a flange 502, a circular core cylinder 503, core cylinder bolts 504, flange bolts 505, and truss members 506. During the factory prefabrication stage, the node connector 501 is precisely welded to the outer surface of the hollow sphere 500. The flange 502 is then fixed to the ends of the node connector 501 and the truss members 506 by welding. All welding operations are completed in the factory, and standardized processes ensure welding quality, avoiding quality fluctuations and environmental pollution caused by on-site welding.

[0031] During on-site assembly, operators align the flange 502 at the end of the truss member 506 with the flange 502 at the end of the node connector 501. A crucial step here is inserting the circular core 503 into the node connector 501 and the truss member 506. The outer diameter of the circular core 503 precisely matches the inner diameter of the node connector 501 and the truss member 506, ensuring coaxiality and providing shear and torsional resistance. Subsequently, core bolts 504 are passed through pre-drilled holes in the circular core 503 to connect the node connector 501 and the truss member 506, tightening them from the inside. Finally, flange bolts 505 are used to secure the two aligned flanges 502 together. This dual connection method of "internal core bolts + external flange bolts" achieves extremely high connection rigidity and reliability. The presence of the circular core tube 503 enables the connection node to effectively withstand shear force, torque and bending moment, avoiding excessive stress on the bolt alone. It is particularly suitable for node parts in large-span tensioned truss structures that bear complex loads.

[0032] In one embodiment of this application, the above-described structural system is further refined. The transverse space truss 10 includes space truss modular connection nodes 50 and transverse space truss module units 60. That is, each transverse space truss 10 is assembled from multiple transverse space truss module units 60 through multiple space truss modular connection nodes 50. Similarly, the longitudinal space truss 20 includes space truss modular connection nodes 50 and longitudinal space truss module units 70. This modular construction method allows the entire structural system to be disassembled into several standardized module units, facilitating factory prefabrication, transportation, and rapid on-site assembly. Both the transverse space truss module units 60 and the longitudinal space truss module units 70 adopt the same node connection method, that is, they are connected through the aforementioned core tube flange bolt nodes, realizing fully modular assembly.

[0033] In one embodiment of this application, the specific structure of the space truss module unit is defined. For example... Figure 11As shown, both the transverse space truss module unit 60 and the longitudinal space truss module unit 70 adopt the same standard cross-sectional form. Specifically, each module unit consists of two upper chords and one lower chord, which are arranged in an inverted triangle in space, forming a stable space truss cross-sectional structure. The inverted triangular cross-section has extremely high in-plane and out-of-plane stiffness, effectively resisting bending moments and torques. The upper and lower chords are connected by multiple web members, which can be straight or diagonal, thus forming a complete load-bearing unit. Upper chord nodes are formed at the connection between the upper chord and the web members, and lower chord nodes are formed at the connection between the lower chord and the web members. These nodes can be prefabricated in the factory with the welded hollow sphere 500 to ensure geometric accuracy. Through this inverted triangular cross-sectional design, the module unit achieves high load-bearing capacity while maintaining a relatively light weight.

[0034] In one embodiment of this application, to facilitate on-site assembly, flanges 502 are pre-welded to the ends of the upper and lower chords of both the transverse space truss module unit 60 and the longitudinal space truss module unit 70 at the factory. Specifically, flanges 502 are welded to both ends of each chord, and these flanges 502 are used for bolting connections to the flanges 502 at the ends of the node connectors 501 on the space truss modular connection node 50. By pre-welding the flanges at the module unit level, on-site construction only requires aligning the two flanges and tightening the bolts, eliminating the need for any welding operations, greatly improving construction efficiency and ensuring consistent connection quality.

[0035] In one embodiment of this application, the connection methods of different components inside the modular connection node 50 of the space truss are further subdivided. Specifically, a node connector 501 with a flange 502 welded to one end and a hollow sphere 500 welded to the other end is specifically used to connect the chord members of the space truss module unit. A node connector 501 without a flange 502 is also welded to the hollow sphere 500, but this type of node connector 501 is used to connect the web members of the space truss module unit. During assembly, the node connector 501 with the flange 502 is connected to the chord member with the flange 502 via core bolts 504, flange bolts 505, and a circular core 503, as described above. For the web members, the connection method is similar but slightly simplified: the end of the web member is also provided with a flange or a connecting lug, and is connected to the corresponding node connector 501 via bolts and a circular core 503. Since the web members mainly bear axial forces, their connection nodes can be appropriately simplified, but a core cylinder structure is still used to ensure alignment accuracy and shear resistance. This differentiated design makes the node construction more reasonable, ensuring both the connection strength of the main load-bearing components (chord members) and the assembly efficiency of the secondary components (web members).

[0036] In one embodiment of this application, the arrangement of each truss in the overall structural system is described. For example... Figure 9 and Figure 10 As shown, each transverse space truss 10 is arranged sequentially in the longitudinal direction of the building, meaning multiple transverse space trusses 10 are arranged parallel to each other. Longitudinal space truss module units 70 are vertically connected between adjacent transverse space trusses 10. Specifically, the two ends of the longitudinal space truss module unit 70 are connected to the space truss modular connection nodes 50 on the two transverse space trusses 10, thus forming a longitudinal force transmission path. This arrangement of "transverse main trusses + longitudinal connecting trusses" constitutes a spatial grid structure, giving the entire system sufficient stiffness and stability in both the transverse and longitudinal directions.

[0037] In one embodiment of this application, the composition of a single transverse space truss 10 is quantified. The transverse space truss 10 is not a single unit, but rather composed of n transverse space truss module units 60 sequentially spliced ​​together through space truss modular connection nodes 50, where n is a natural number. The specific value of n is not fixed, but can be flexibly determined according to the structural span and load-bearing requirements of the actual project. For example, when the structural span is small, n can take a smaller value, such as 3 or 4; when the structural span is large, n can take a larger value, such as 8 or 10. Typically, these n transverse space truss module units 60 are arranged symmetrically from left to right, ultimately forming a transverse space truss 10 with distinct layers and uniform stress. By adjusting the number of module units, the structural system of this invention can flexibly adapt to the engineering requirements of different spans.

[0038] In one embodiment of this application, the overall assembly quantity relationship of the entire structural system is fully described. For example... Figure 1 and Figure 10As shown, the entire modular, fully assembled tensioned truss structure system with bolted core tube flanges is assembled from m transverse space trusses 10, (n-1)(m-1) longitudinal space truss module units 70, and 2(m-1) edge trusses 30. Here, m and n are natural numbers, representing the number of longitudinal and transverse modules, respectively. Specifically, the m transverse space trusses 10 are arranged parallel to each other along the longitudinal (length) direction of the building. Between two adjacent transverse space trusses 10, along the length of the transverse truss (i.e., from the first end to the last end), there are (n-1) gaps. Each gap requires a longitudinal space truss module unit 70, therefore the total number of longitudinal module units is (n-1) multiplied by (m-1). Meanwhile, on the outermost side of the overall structure, namely the outer side of the first transverse spatial truss 10 and the outer side of the m-th transverse spatial truss 10, (m-1) side trusses 30 need to be set each (because the side trusses 30 are set on the left and right sides of the transverse spatial truss 10, with (m-1) connection positions on each side), so the total number of side trusses 30 is 2(m-1). This quantitative relationship ensures that the structure forms a complete spatial force-bearing system after assembly, and all module units are connected by core tube flange bolt nodes without any welding.

[0039] In one embodiment of this application, the specific structure and connection relationships of the cable-stayed system 40 are described in detail. For example... Figure 12 As shown, the cable-stayed system 40 mainly consists of three parts: horizontal cables 400, diagonal cables 401, and struts 402. The strut 402, as a vertical support member, has its top end supported directly below the modular connection node 50 of the space truss, and its bottom end connected to the cable. One end of the diagonal cable 401 is connected to the lower chord node of the main node adjacent to the strut 402 (i.e., the adjacent modular connection node 50 of the space truss), and the other end is connected to the bottom of the strut 402. The horizontal cables 400 are connected between the bottoms of two adjacent struts 402. With this arrangement, when prestress is applied to the diagonal cables 401 and the horizontal cables 400, the strut 402 is subjected to downward pressure. According to the principle of action and reaction, the strut 402 provides an upward elastic support force to the superstructure. The tension of the diagonal cables 401 can effectively reduce the outward convex deformation of the transverse space truss 10 under external loads, while its horizontal component helps to reduce the horizontal thrust of the entire structure on the external support members. The horizontal cable 400 ensures the coordinated work between the struts 402 and prevents individual struts from becoming unstable.

[0040] In one embodiment of this application, the method for adjusting the curvature of the structure is described. Because the structural system of this invention employs modular assembly, the curved surface shape (e.g., arch or saddle shape) of the entire space truss structure is not achieved by bending members on-site, but rather by adjusting the modular connection nodes 50 of the space truss. Specifically, based on the height-to-span ratio determined by the structural design, the welding angle between the node connector 501 and the welded hollow sphere 500 can be flexibly adjusted during factory prefabrication. By changing this angle, a certain included angle can be formed between adjacent truss module units. When numerous module units are connected sequentially, these minute included angles accumulate to form the macroscopic curvature required for the entire structure, thus perfectly adapting to various complex architectural curved surface shapes. The curvature during assembly is entirely controlled by these nodes, eliminating the need for secondary processing of the members and greatly improving construction accuracy.

[0041] In one embodiment of this application, the welding method and geometric parameters of the flange 502 were optimized. To ensure the stress performance and stability of the flange connection, the flange 502 is connected to the node connector 501 or truss member 506 using a perpendicular welding method, meaning the flange surface is perpendicular to the central axis of the node connector 501 or truss member 506. This welding angle ensures that the load is evenly transferred between the flange and the component, avoiding local stress concentration caused by angular deviation. Simultaneously, the thickness of the flange 502 is designed to be greater than the thickness of the component it is welded to (node ​​connector 501 or truss member 506). Increasing the thickness of the flange 502 enhances the load-bearing capacity of the connection, preventing bending deformation or damage to the flange during stress, and ensuring that the preload of the bolt connection is effectively maintained.

[0042] In one embodiment of this application, the arrangement of the cable-stayed system 40 is further optimized. Based on the specific shape and load requirements of the upper transverse space truss 10, the cable-stayed system 40 can be arranged with cable supports positioned in the middle. This middle-position arrangement means that the struts 402 and corresponding cables are mainly concentrated in the middle region of the transverse space truss 10, rather than being evenly distributed across the entire span. This arrangement is suitable for situations with large spans and where the main load is concentrated in the middle of the span. It can achieve maximum vertical support with less cable support material, while reducing the occupation of interior space and making the interior more open and aesthetically pleasing. In practical implementation, the middle-position arrangement or other arrangements can be flexibly selected based on factors such as the span-to-height ratio and load size.

[0043] In one embodiment of this application, the specific basis for determining the number of modules is explained. The base number of the transverse space truss module unit 60 is denoted as n. The specific value of n is not arbitrarily chosen, but determined based on the curvature and span of the structure. The greater the curvature or the larger the span, the larger the required number of module units n is usually. The transverse space truss 10, assembled from n transverse space truss module units 60, is defined as a longitudinal assembly unit in the structure. The base number of this longitudinal assembly unit is denoted as m. The specific value of m is determined based on the length of the structure. The longer the structure, the larger the required number of longitudinal assembly units m. By reasonably selecting the values ​​of n and m, the structural system of the present invention can achieve optimal modular division while meeting the structural stress requirements, minimizing the types and numbers of module units, thereby improving factory prefabrication efficiency and on-site assembly speed.

[0044] In one embodiment of this application, the novel modular fully assembled tensioned truss structure system with core tube flange bolt connection described above can be constructed using the following steps. First, all transverse space truss module units 60, longitudinal space truss module units 70, side trusses 30, and space truss modular connection nodes 50 are prefabricated in the factory. During prefabrication, node connectors 501 are welded to hollow spheres 500, flanges 502 are welded to the ends of node connectors 501 and truss members 506, and accessories such as circular core tubes 503, core tube bolts 504, and flange bolts 505 are packaged according to specifications. Simultaneously, the fixed-length cutting and end anchor installation of struts 402, horizontal cables 400, and diagonal cables 401 in the cable-stayed system 40 are completed in the factory. Subsequently, all prefabricated components are transported to the construction site. During on-site construction, temporary support frames are first installed according to the design drawings. Then, starting from one end, install the transverse space trusses 10 one by one: The transverse space truss module units 60 are spliced ​​together through the space truss modular connection nodes 50. At each node, first insert the circular core cylinder 503 into the node connector 501 and the truss member 506, then insert the core cylinder bolt 504 and tighten it. Finally, pass the flange bolt 505 through the flange 502 and tighten it. After completing the installation of all transverse space trusses 10, install the longitudinal space truss module units 70, connecting both ends to the corresponding nodes on the adjacent transverse space trusses 10. Next, install the side trusses 30. After the entire upper truss structure is assembled, install the cable-stayed system 40 below the transverse space trusses 10: fix the top of the strut 402 directly below the space truss modular connection node 50 with bolts, connect the horizontal cables 400 and the diagonal cables 401 according to the design positions, and finally apply prestress to the design value. The entire construction process requires no on-site welding, only bolt tightening and cable tensioning operations. The construction speed is fast, the quality is easy to control, and the structure can be disassembled and recycled as a whole.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular, fully assembled tensioned truss structure system with core tube flange bolt connection, characterized in that, include: Transverse space truss (10), longitudinal space truss (20), side truss (30), cable bracing system (40) and modular connection node of space truss (50); The transverse space truss (10) and the longitudinal space truss (20) are modularly spliced ​​together through the space truss modular connection node (50); The cable support system (40) is arranged below the transverse space truss (10), and the struts (402) in the cable support system (40) are located directly below the modular connection node (50) of the space truss; The side truss (30) is disposed on the left and right sides of the transverse space truss (10); The modular connection node (50) of the space truss includes a hollow sphere (500), a node connector (501), a flange (502), a circular core cylinder (503), a core cylinder bolt (504), a flange bolt (505), and a truss member (506). The node connector (501) is welded to the hollow sphere (500), and the flange (502) is welded to the node connector (501) and the truss member (506); The circular core (503) is inserted into the interior of the node connector (501) and the truss member (506), the core bolt (504) passes through the circular core (503) to connect the node connector (501) and the truss member (506), and the flange bolt (505) connects the flange (502) on the node connector (501) and the truss member (506).

2. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The transverse space truss (10) includes the space truss modular connection node (50) and the transverse space truss module unit (60); the longitudinal space truss (20) includes the space truss modular connection node (50) and the longitudinal space truss module unit (70).

3. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 2, characterized in that, Both the transverse space truss module unit (60) and the longitudinal space truss module unit (70) are composed of two upper chords and one lower chord, forming an inverted triangular cross-section structure; The upper chord and the lower chord are connected by a web member, and the connection points between the upper chord and the web member, and between the lower chord and the web member, respectively form upper chord nodes and lower chord nodes.

4. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 2, characterized in that, The upper and lower chords of the transverse space truss module unit (60) and the longitudinal space truss module unit (70) are both welded with the flange (502).

5. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection according to claim 2, characterized in that, The other end of the node connector (501), to which the flange (502) is welded, is welded to the hollow sphere (500) for connecting the chord of the space truss module unit; The node connector (501) of the unwelded flange (502) is welded to the hollow sphere (500) for connecting the web members of the space truss module unit; The node connector (501) with the flange (502) is connected to the chord with the flange (502) via the core bolt (504), the flange bolt (505) and the circular core (503); The web member is connected to the node connector (501) by bolts and the circular core cylinder (503).

6. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, Each of the transverse space trusses (10) is arranged longitudinally in sequence, and the longitudinal space truss module unit (70) is vertically connected to it.

7. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection according to claim 1, characterized in that, The transverse space truss (10) is composed of n transverse space truss module units (60) spliced ​​together, where n is a natural number.

8. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection according to claim 7, characterized in that, The core tube flange bolt connection modular fully assembled tensioned truss structure system is assembled from m transverse space trusses (10), (n-1)(m-1) longitudinal space truss module units (70), and 2(m-1) side trusses (30), where m is a natural number.

9. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The cable support system (40) consists of horizontal cables (400), inclined cables (401) and the support rods (402); The inclined cable (401) is connected between the main node adjacent to the strut (402) and the bottom of the strut (402); The horizontal cable (400) is connected between two adjacent struts (402).

10. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The curvature during the assembly process is adjusted by the modular connection node (50) of the space truss. Based on the height-to-span ratio of the structure, the angle between the node connector (501) and the welded hollow sphere (500) is determined to adapt to the curved surface shape of the entire space truss structure.

11. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The flange (502) is welded perpendicularly to the central axis of the node connector (501) or the truss member (506); the thickness of the flange (502) is greater than the thickness of the member to which it is welded.

12. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The arrangement of the cable support system (40) is selected based on the shape and stress requirements of the upper transverse space truss (10), with the cable supports arranged in the middle.

13. The modular, fully assembled tensioned truss structure system with core tube flange bolt connection as described in claim 1, characterized in that, The base number of the transverse space truss module unit (60) is n, and the specific value of n is determined according to the curvature and span of the structure; the transverse space truss (10) assembled from n transverse space truss module units (60) is a longitudinal assembly unit with a base number of m, and the specific value of m is determined according to the length of the structure.

14. An assembly method for a modular, fully assembled tensioned truss structure system with core tube flange bolt connection according to any one of claims 1 to 13, characterized in that, Includes the following steps: Step 1: Prefabricate all transverse space truss module units (60), longitudinal space truss module units (70), side trusses (30), and space truss modular connection nodes (50) in the factory; during the prefabrication process, weld the node connectors (501) to the hollow spheres (500), weld the flanges (502) to the ends of the node connectors (501) and the ends of the truss members (506), and package the circular core cylinders (503), core cylinder bolts (504), and flange bolts (505) according to specifications; at the same time, complete the fixed-length cutting and end anchor installation of the struts (402), horizontal cables (400), and diagonal cables (401) in the cable-stayed system (40) in the factory; Step 2: Transport all prefabricated components to the construction site and install temporary support frames according to the design drawings; Step 3: Starting from one end, install the transverse space truss (10) one by one: splice the transverse space truss module units (60) through the space truss modular connection nodes (50). At each node, first insert the circular core cylinder (503) into the node connector (501) and the truss member (506), then insert the core cylinder bolt (504) and tighten it, and finally pass the flange bolt (505) through the flange (502) and tighten it. Step 4: After completing the installation of all transverse space trusses (10), install the longitudinal space truss module unit (70) and connect its two ends to the corresponding space truss modular connection nodes (50) on the adjacent transverse space trusses (10); Step 5: Install the side truss (30); Step 6: After the upper truss structure is fully assembled, install the cable support system (40) below the transverse space truss (10): fix the top of the support rod (402) directly below the modular connection node (50) of the space truss with bolts, connect the horizontal cable (400) and the inclined cable (401) according to the design position, and finally apply prestress to the design value.

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