Pedestrian overpass adopting space string supporting structure and provided with semi-rigid tension awning structure

Abstract

The invention belongs to the technical field of fabricated buildings, and particularly relates to a pedestrian overpass adopting a spatial string support structure and provided with a semi-rigid tension awning structure, which is provided with a string support self-balancing bridge deck system and the semi-rigid tension awning structure. The string supporting self-balancing bridge deck system is provided with a pressure-bearing bridge deck and a space string supporting structure arranged below the pressure-bearing bridge deck. The semi-rigid tensioning awning structure is provided with a rigid fish belly overhanging truss, a flexible cable net structure system, a vertical supporting component and a landing cable component. The vertical supporting components are provided with A-shaped supporting columns, swing supporting columns and end supporting columns. The two A-shaped supporting columns and the two swing supporting columns are connected between the rigid overhanging truss and the pressure-bearing bridge floor. The bottom ends of the swinging supporting columns are hinged to the pressure-bearing bridge floor; the end supporting column is arranged on the outer side of the swing supporting column, and the top end of the swing supporting column is connected with the top end of the end supporting column. The light and transparent building appearance is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of prefabricated buildings, and more particularly relates to a pedestrian bridge that adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned canopy structure. Background Art

[0002] The existing pedestrian bridge structures are usually of a single style under normal conditions and mostly have an open structure. The overall architectural appearance and usage functions still need to be improved, which are specifically described as follows:

[0003] There is a common type of pedestrian bridge style with an open structure in the prior art, which is commonly a single-span or multi-span structural form supported by an integral box-section. This type of pedestrian bridge has a simple structure, is easy to construct, and has a controllable cost, which is relatively suitable for most conventional application scenarios. However, limited by its overly unified and simplified architectural form characteristics, it severely lacks flexibility in architectural expression when selected in areas such as core blocks and iconic locations, and its applicable range is greatly restricted. Moreover, the open bridge structure lacks the function of shielding against bad weather such as rain, snow, and intense sunlight, and its architectural usage functions are relatively limited.

[0004] There is also a common type of pedestrian bridge style with a closed structure in the prior art, which is commonly a through-truss spanning structure with a full-story height. The truss height also serves as the pedestrian corridor space and provides the structural span support structure at the same time. Although this type of pedestrian bridge has the function of shielding against bad weather such as rain, snow, and intense sunlight, and the pedestrian usage quality has been improved; however, the relatively fixed truss appearance and the closed external visual perception limit the architectural form characteristics of the pedestrian bridge, and its applicability is limited under specific circumstances such as considering architectural appearance requirements.

[0005] In summary, the existing pedestrian bridge structures are relatively traditional and monotonous, and have not provided an effective solution to comprehensively meet the requirements such as closed shielding against bad weather, flexible and beautiful architectural appearance, and light and transparent canopy style. Summary of the Invention

[0006] In view of the above analysis, the embodiments of the present invention aim to provide a pedestrian bridge that adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned canopy structure to solve at least one of the above problems existing in the prior art.

[0007] The object of the present invention is achieved as follows:

[0008] A pedestrian bridge that adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned canopy structure, comprising:

[0009] A cable-strut bracing self-balanced bridge deck system, having a load-bearing bridge deck and a spatial cable-strut bracing structure provided below the load-bearing bridge deck;

[0010] Semi-rigid tensioned awning structure, which has a rigid fish-belly suspended truss, a flexible cable net structure system, vertical support members and floor cables; the flexible cable net structure system is connected to the rigid suspended truss; the vertical support members include A-shaped support columns, sway support columns and end support columns. Two A-shaped support columns and two sway support columns are both connected between the rigid suspended truss and the load-bearing bridge deck, and the two A-shaped support columns are located between the two sway support columns; the top of the sway support column is connected to the end of the rigid suspended truss, and the bottom of the sway support column is hinged to the load-bearing bridge deck; the end support column is arranged outside the sway support column, and the top of the sway support column is connected to the top of the end support column; the floor cable member is connected to the top of the end support column.

[0011] Further, the load-bearing bridge deck includes a steel beam structure and a cast-in-place bridge deck arranged above the steel beam structure; the steel beam structure has an upper chord structure, and the upper chord structure is connected to the load-bearing cable and the support web members to form a space cable-stayed support structure.

[0012] Further, the space cable-stayed support structure is arranged in multiple bays.

[0013] Further, the steel beam structure includes multiple main beams, and multiple secondary beams are vertically connected between adjacent two main beams; adjacent two main beams and the secondary beams between them together form the upper chord structure of a space cable-stayed support structure.

[0014] Further, the support web members adopt V-shaped support rods, the tip of the V-shaped support rod is connected to the load-bearing cable, and the two open ends of the V-shaped support rod are both connected to the connection points of the secondary beam and the main beam.

[0015] Further, a tuned mass damper is provided below the load-bearing bridge deck.

[0016] Further, the top of the end support column is connected to a newly-built type reaction force support structure or an existing structure retrofitted type reaction force support structure through the floor cable member.

[0017] Further, the flexible cable net structure system has ridge side cables, large-span direction side cables and distributed stability cables; the top of the sway support column is connected to the top of the end support column through the ridge side cables.

[0018] Further, an outrigger short column is provided on the A-shaped support column, and the outrigger short column is connected to the large-span direction side cable to provide middle support for the large-span direction side cable, and the large-span direction side cable is horizontal or approximately horizontal.

[0019] Further, the end support column and the sway support column both incline away from the A-shaped support column.

[0020] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0021] a) The pedestrian bridge provided by the present invention adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned awning structure. Through the load-bearing bridge deck and the spatial cable-strut bracing structure below it, the internal force balance of the load-bearing cables, support web members, and load-bearing bridge deck is achieved. It is a novel and efficient bridge deck system bracing structure. On the premise of ensuring the lightness of the bridge deck system, it effectively improves the structural load-bearing mode, enhances the structural load-bearing efficiency, improves the appearance characteristics of the bridge deck system, saves materials, and controls the cost.

[0022] b) The pedestrian bridge provided by the present invention adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned awning structure. It adopts a lightweight semi-rigid tensioned awning structure, and on the premise of meeting the basic function of shielding in bad weather, it effectively achieves a light and transparent building appearance.

[0023] c) The pedestrian bridge provided by the present invention adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned awning structure. The semi-rigid tensioned awning structure uses A-shaped support columns and middle sway support columns to divide the span of the rigid suspended truss, which can effectively control the structural deformation and internal force level, and can achieve a larger-span awning structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the embodiments of the present specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Structural schematic diagram of the pedestrian bridge provided by the present invention, which adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned awning structure Figure 1 ;

[0026] Figure 2 Structural schematic diagram of the pedestrian bridge provided by the present invention, which adopts a spatial cable-strut bracing structure and is provided with a semi-rigid tensioned awning structure Figure 2 ;

[0027] Figure 3 Structural schematic diagram of the semi-rigid tensioned awning structure provided by the present invention;

[0028] Figure 4 Structural schematic diagram of the connection between the rigid suspended truss and the A-shaped support column and the sway support column of the semi-rigid tensioned awning structure provided by the present invention;

[0029] Figure 5 Structural schematic diagram of the cable-strut self-balanced bridge deck system provided by the present invention;

[0030] Figure 6Elevation schematic diagram of the cable-supported self-balanced bridge deck system provided by the present invention;

[0031] Figure 7 Structural schematic diagram of the steel beam structure of the cable-supported self-balanced bridge deck system provided by the present invention;

[0032] Figure 8 Rendering of a pedestrian bridge adopting a spatial cable-supported structure and provided with a semi-rigid tensioned awning structure for implementing the present invention.

[0033] Reference numerals:

[0034] 100, Cable-supported self-balanced bridge deck system; 200, Semi-rigid tensioned awning structure; 300, Pier system;

[0035] 11, Rigid hanging truss; 12, Ridge side cable; 13, Distributed stabilizing cable; 14, Side cable in the large-span direction; 15, Floor cable member; 16, A-shaped support column; 161, Extended short column; 162, Main rod; 163, Column base; 17, End support column; 18, Rocking support column;

[0036] 21, Steel beam structure; 211, Main beam; 212, Secondary beam; 22, Cast-in-place bridge deck; 23, Load-bearing cable; 24, Support web member;

[0037] 31, New type reaction support structure; 32, Existing structure retrofit type reaction support structure. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. It should be noted that, without conflict, the implementation manners and features in the present disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0039] In the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of components may be exaggerated. When the exemplary embodiments can be implemented differently, the specific process sequences may be performed in an order different from that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to that described. In addition, the same reference numerals denote the same components.

[0040] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. Further, when the terms "comprise" and / or "include" and their variants are used in this specification, it is stated that the stated features, integers, steps, operations, components, assemblies and / or groups thereof exist, but do not preclude the existence or addition of one or more other features, integers, steps, operations, components, assemblies and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as terms of degree, and thus they are used to explain the inherent deviations of measured, calculated and / or provided values that would be recognized by a person of ordinary skill in the art.

[0041] Embodiment 1

[0042] A specific embodiment of the present invention discloses a pedestrian bridge adopting a space cable-supported structure and provided with a semi-rigid tensioned awning structure, which may hereinafter be simply referred to as "pedestrian bridge".

[0043] As Figures 1 to 8 shown, the pedestrian bridge includes a cable-supported self-balancing bridge deck system 100 and a semi-rigid tensioned awning structure 200; wherein, the cable-supported self-balancing bridge deck system 100 has a load-bearing bridge deck and a space cable-supported structure provided below the load-bearing bridge deck; the semi-rigid tensioned awning structure 200 has a rigid suspended truss 11, a flexible cable net structure system, a vertical support member and a ground cable member 15; the flexible cable net structure system is connected to the rigid suspended truss 11; the vertical support member has an A-shaped support column 16, a rocking support column 18 and an end support column 17, two A-shaped support columns 16 and two rocking support columns 18 are both connected between the rigid suspended truss 11 and the load-bearing bridge deck, and the two A-shaped support columns 16 are located between the two rocking support columns 18, and the support height of the A-shaped support column 16 is lower than the support height of the rocking support column 18; the top end of the rocking support column 18 is connected to the end of the rigid suspended truss 11, and the bottom end of the rocking support column 18 is hinged to the load-bearing bridge deck and can swing within a safe angle range; the end support column 17 is provided outside the rocking support column 18, and the top end of the rocking support column 18 is connected to the top end of the end support column 17; the ground cable member 15 is connected to the top end of the end support column 17.

[0044] In this embodiment, the pedestrian bridge further includes a pier system 300 for the load-bearing bridge deck. Among them, for a newly built pedestrian bridge, the pier system 300 can preferably adopt the style of concrete-filled steel tube members, which has the characteristics of simple construction and high bearing capacity; for a rebuilt or renovated pedestrian corridor bridge, the original bridge piers and foundation structures can be considered for continued use.

[0045] In this embodiment, the cable-supported self-balanced bridge deck system 100 can be simply referred to as the "bridge deck system". The bridge deck system adopts a cable-supported structure, combining high structural efficiency and architectural beauty. A spatial cable-supported structure is arranged under the load-bearing bridge deck. The bridge deck itself adopts a steel beam system, and a cast-in-place bridge deck 22 is provided, jointly forming a bridge deck support system;

[0046] Specifically, the load-bearing bridge deck includes a steel beam structure 21 and a cast-in-place bridge deck 22 arranged above the steel beam structure 21. The steel beam structure 21 serves as the load-bearing part of the cable-supported self-balanced bridge deck system 100. The load-bearing cables 23 and the support web members 24 are connected to the steel beam structure 21 to form a spatial cable-supported structure.

[0047] In other words, the steel beam structure 21 has an upper chord structure, and the upper chord structure is connected to the load-bearing cables 23 and the support web members 24 to form a spatial cable-supported structure. Among them, the load-bearing cables 23 are pre-tensioned members, maintaining a certain level of prestress to provide tensile support force; the support web members 24 are supported between the load-bearing cables 23 and the steel beam structure 21 of the load-bearing bridge deck, facilitating the pre-tensioning effect of the load-bearing cables 23, supporting the load-bearing bridge deck, and reducing the calculated structural span of the load-bearing bridge deck.

[0048] To ensure the bridge deck width, the spatial cable-supported structure in this embodiment is preferably arranged in multiple bays, such as two bays.

[0049] In one alternative embodiment, the steel beam structure 21 includes multiple main beams 211, and multiple secondary beams 212 are vertically connected between two adjacent main beams 211; two adjacent main beams 211 and the secondary beams 212 therebetween jointly form the upper chord structure of a bay of the spatial cable-supported structure. That is to say, the steel beam structure 21 has multiple juxtaposed and continuous upper chord structures. Two adjacent bays of the spatial cable-supported structure share one steel beam. Each upper chord structure is connected to a load-bearing cable 23, and a support web member 24 is provided between the load-bearing cable 23 and the upper chord structure.

[0050] In one preferred embodiment, the support web member 24 adopts a V-shaped support rod. The tip of the V-shaped support rod is connected to the load-bearing cable 23, and the two open ends of the V-shaped support rod are both connected to the connection between the secondary beam 212 and the main beam 211. The V-shaped support rod and the secondary beam 212 form a triangular support structure.

[0051] Since the bridge deck system adopts a cable-supported structure, its structural members are relatively slender, and cable tensioning members are used to complete the combined load-bearing. Therefore, the overall vertical stiffness and natural vibration frequency of the structure may be relatively low compared to those of a conventional integral box girder cross-section pedestrian bridge structure, and it is relatively difficult to control the pedestrian comfort. Therefore, in one alternative implementation, a tuned mass damper is provided below the load-bearing bridge deck. The method of suspending the tuned mass damper under the bridge deck is used to assist in solving the pedestrian comfort problem of this type of bridge structure. According to the structural dynamics calculation characteristics of the main bridge system, the tuned mass damper is matched and set to control the vertical acceleration response degree of the bridge deck system under the action of pedestrian excitation, and ensure that the pedestrian comfort control standard meets the normal use requirements. Specifically, the tuned mass damper is suspended under the load-bearing bridge deck. Preferably, the tuned mass damper is connected to the steel beam structure 21 of the load-bearing bridge deck, and the lower end of the tuned mass damper is as close as possible to the steel beam without exceeding the space range enclosed by the load-bearing cable 23 to ensure the aesthetics of the bridge deck.

[0052] In one alternative implementation, the pedestrian bridge is also equipped with a reaction support structure, and the reaction support structure is connected to the floor cable member 15. Optionally, the reaction support structure can be a newly built reaction support structure 31, or an existing structure retrofit type reaction support structure 32 realized by retrofitting the existing building status platform, etc. That is to say, the top of the end support column 17 is connected to the newly built reaction support structure 31 or the existing structure retrofit type reaction support structure 32 through the floor cable member 15. Among them, the newly built reaction support structure 31 can utilize building function spaces such as elevator traffic cores to set up a strong lateral force resistant steel structure support cylinder. The lower part of the cylinder uses a pile foundation system to ensure the foundation stability, and the upper part is connected to the floor cable member 15 to realize the cover cable reaction support structure, which is simple and efficient; for the existing structure retrofit type reaction support structure 32, in the retrofit design of the existing structure, measures such as adding steel beams and increasing the cross-section of the existing members need to be taken according to the reaction conditions to ensure that the bearing capacity conditions are met, and a counterweight design strategy should be adopted as much as possible to ensure that the total weight of the existing structure + the counterweight structure is not less than the reaction condition of the floor cable of the upper cover structure, that is, after the existing structure is retrofitted with a counterweight scheme, it will not be pulled by the floor cable member 15 of the upper cover structure and cause a risk of reverse overturning.

[0053] Of course, it can be understood that when the site conditions permit, the floor cable member 15 can also be directly connected to the ground foundation.

[0054] In this embodiment, the vertical support members of the semi-rigid tensioned awning structure 200 can be directly installed on the newly built bridge deck system, and the internal force transmission is directly completed by using the newly built bridge deck structure. In addition to the A-shaped support columns 16 and the end support columns 17, a pair of swing support columns 18 are also provided in the middle. This is mainly to further divide the span of the rigid suspended truss 11 and the cable net structure under the condition of increasing the awning span, and to control the structural deformation and the internal force level. Moreover, the bottom end of the swing support column 18 is hinged to the pressure-bearing bridge deck. When the rigid suspended truss 11 deforms in the longitudinal plane, since the swing support column 18 is hinged to the pressure-bearing bridge deck, as the height positions of both ends of the rigid suspended truss 11 change, the swing support column 18 can tilt and swing accordingly, that is, the swing support column 18 can swing within a safe angle range along the bridge deck span direction, and the tilting and swinging range will not affect the structural safety.

[0055] In one alternative embodiment, the rigid suspended truss 11 is implemented in the form of a planar double-web fish-belly-shaped and vertically suspended open-web truss. The rigid suspended truss 11 is a rigid fish-belly suspended truss, with a double-web fish-belly-shaped structure in the plane and a vertically suspended open-web truss structure. The rigid fish-belly suspended truss is made of high-strength materials (such as high-strength steel, aluminum alloy, etc.), has a cross-sectional scale that can withstand both tension and compression, belongs to the category of rigid members, and its structural shape basically matches the existing road surface bridge construction plan, without the need for form-finding of the flexible boundary of the cable structure, and better adapts to the design requirements of the existing road surface bridge building form.

[0056] In this embodiment, the flexible cable net structure system has ridge edge cables 12, side cables 14 in the large-span direction, and distributed stabilizing cables 13; the top end of the swing support column 18 is connected to the top end of the end support column 17 through the ridge edge cable 12. The ridge edge cables 12, side cables 14 in the large-span direction, and distributed stabilizing cables 13 together form a cable net surface. The rigid suspended truss 11, ridge edge cables 12, side cables 14 in the large-span direction, and distributed stabilizing cables 13 form an upper tensioned cable net structure. The upper tensioned cable net structure is open at both ends along the span direction. The ridge edge cables 12 and side cables 14 in the large-span direction form the boundary of the upper tensioned cable net structure. By utilizing the characteristics of the flexible cable structure that only bears tension and can apply prestress, the structure form-finding is completed according to the structural internal force balance condition. Finally, the upper tensioned cable net structure achieved has a reasonable load-bearing capacity, high working efficiency, and saves the amount of structural materials used. Among them, the ridge edge cables 12 and side cables 14 in the large-span direction are boundary components of the cable net structure; the distributed stabilizing cables 13 are the distributed load-bearing systems of each cable net interface, supporting the covering system attached to the cable net and providing stable support for the ridge edge cables 12 and side cables 14 in the large-span direction. The above-mentioned ridge edge cables 12, side cables 14 in the large-span direction, and distributed stabilizing cables 13 together form the flexible part of the entire cable net structure system, which is the scope of prestress tension implementation and the main distributed attachment scope of the upper covering system.

[0057] In this embodiment, the pre-tensioning force of the distributed stabilizing cable 13 perpendicular to the side cable 14 in the large span direction is controlled to ensure the minimum standard level, that is, to maintain the standard of no relaxation under the main verification working conditions and no relaxation of the main cable net surface. Exemplarily, among the multiple crossed distributed stabilizing cables 13, some are perpendicular to the side cable 14 in the large span direction, and some are parallel to the side cable 14 in the large span direction; wherein, the pre-tensioning force of the distributed stabilizing cable 13 perpendicular to the side cable 14 in the large span direction can be set at 3kN to 5kN. Since the cable force of the low curvature large span side cable 14 is mainly caused by the part of the vertical distributed stabilizing cable 13, this measure can effectively control the cable force level of the low curvature side cable.

[0058] In this embodiment, the A-shaped support column 16 and the swing support column 18 provide distributed support in the middle of the canopy structure, effectively sharing the vertical load within the cable net coverage area. Two end support columns 17 are provided on the outside of each A-shaped support column 16, and the top of each end support column 17 is connected to the top of the A-shaped support column 16 through a ridge edge cable 12; the two large-span direction side cables 14 and the four ridge edge cables 12 have four end connection points, and the four end connection points are respectively connected to the top of an end support column 17 through a locking clamp. The two ends of the rigid suspension truss 11 are respectively connected to the two ridge edge cables 12, and the top of each swing support column 18 is connected to the end connection point of the rigid suspension truss 11.

[0059] The side cables 14 in the large span direction of this embodiment adopt a low curvature setting scheme, and the curvature of the side cables 14 in the large span direction is small, and is closer to a straight state, which can meet the flexibility requirements of the building form. Among them, the side cables 14 in the large span direction are horizontal or approximately horizontal, which means that the side cables 14 in the large span direction have a small curvature and are basically horizontal in visual effect.

[0060] Furthermore, an outwardly extending short column 161 is provided on the A-shaped support column 16, and the outwardly extending short column 161 is connected to the large-span direction side cable 14, and is used to provide a middle support for the large-span direction side cable 14, and the large-span direction side cable 14 is horizontal or approximately horizontal. The outwardly extending short column 161 serves as a multi-span branch seat of the low-curvature large-span direction side cable 14, ensuring reasonable control of the maximum single-section span of the low-curvature side cable, effectively controlling the cable force peak, and thus effectively alleviating the problem of large cable force caused by low curvature.

[0061] In this embodiment, the A-shaped support column 16 is composed of two main rods 162. The tops of the two main rods 162 are simultaneously connected to the rigid suspended truss 11, and the bottoms of the two main rods 162 are directly connected to the load-bearing bridge deck of the bridge deck system. Optionally, column bases 163 are provided at the lower ends of the two main rods 162, and the A-shaped support column 16 is connected to the steel beam structure 21 of the load-bearing bridge deck through the two column bases 163 to ensure the joint stiffness at the column bottom position. In the A-shaped support column 16 of this embodiment, there is no need to arrange a tie rod for tension balance between the two main rods 162, because the A-shaped support column 16 here directly supports on the newly built bridge deck structure and does not need to adopt a disconnection strategy, and the thrust self-balancing effect can be directly achieved by using the newly built bridge deck structure. At the same time, for the A-shaped support column 16, since it is no longer a side-span support member itself, but a middle support of the rigid suspended truss 11 and the joint stiffness at the column bottom position is relatively large, there is no need to arrange an out-of-plane stabilizer on the A-shaped support column 16.

[0062] In one optional implementation manner, both the end support column 17 and the swing support column 18 incline away from the A-shaped support column 16. Further, the two end support columns 17 on the same side incline away from each other in the direction perpendicular to the bridge deck span, presenting an inverted V shape. The above structural arrangement can improve the support stability of the end support column 17 and the swing support column 18.

[0063] Compared with the prior art, the pedestrian bridge provided in this embodiment, which adopts a space cable-strut support structure and is provided with a semi-rigid tensioned awning structure, has the following beneficial effects:

[0064] 1. The load-bearing bridge deck, load-bearing cable, and V-shaped support rod jointly constitute a cable-strut self-balancing bridge deck system. By using the prestress loading and structural self-balancing design strategy, while ensuring the thin and light appearance of the bridge deck, the working efficiency of structural members is effectively improved, materials are saved, and the cost is controlled.

[0065] 2. In the semi-rigid tensioned awning structure of this application, the rigid suspended truss is used to replace the top flexible ridge cable structure in the existing space cable net system. This application uses the rigid suspended truss and the flexible ridge side cables, side cables, and distributed stabilizing cables to jointly construct an overall cable net structure plane support system, effectively improving the vertical stiffness and lateral stiffness of the overall structure, effectively controlling the vertical deformation of the main body of the large-span tensioned awning structure and the horizontal deformation under horizontal loads such as wind loads, and significantly improving the stability and structural safety of the overall structure.

[0066] 3. In the semi-rigid tensioned awning structure of this application, by using the segmented support of the A-shaped support column and the swing support column, applying low stress to the vertical distributed stabilizing cables, and setting the floor cable components, the cable force state of the side cables under low curvature conditions is effectively controlled, and the design scheme of using small-curvature large-span side cables for the tensioned awning structure is realized.

[0067] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present application. It should be understood that the above description is only for the specific embodiments of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure, characterized in that: include: A string-supported self-balancing bridge deck system, comprising a pressure-bearing bridge deck and a spatial string-supported structure arranged below the pressure-bearing bridge deck; Semi-rigid tension canopy structure, with rigid fish belly suspension truss, rigid suspension truss, flexible cable net structure system, vertical support members and ground cable members; A flexible cable net structure system is connected to the rigid suspension truss; The vertical support structure comprises an A-shaped support column, a swing support column and an end support column. The two A-shaped support columns and the two swing support columns are all connected between the rigid suspension truss and the pressure-bearing bridge deck, and the two A-shaped support columns are located between the two swing support columns. The top end of the swing support column is connected to the end of the rigid suspension truss, and the bottom end of the swing support column is hinged to the pressure-bearing bridge deck. The end support column is arranged on the outer side of the swing support column, and the top end of the swing support column is connected to the top end of the end support column. The ground cable member is connected to the top end of the end support column.

2. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 1 is characterized in that: The pressure-bearing bridge deck comprises a steel beam structure and a cast-in-place bridge deck disposed above the steel beam structure; The steel beam structure has an upper chord structure, and the upper chord structure is connected with the load-bearing cables and the supporting webs to form a spatial chord support structure.

3. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 2 is characterized in that: The spatial string support structure adopts a multi-frame arrangement.

4. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 3 is characterized in that: The steel beam structure includes a plurality of main beams, and a plurality of secondary beams are vertically connected between two adjacent main beams; Two adjacent main beams and the secondary beam therebetween together form an upper chord structure of a spatial string-braced structure.

5. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 4 is characterized in that: The supporting web rod adopts a V-shaped supporting rod, the tip of the V-shaped supporting rod is connected to the load-bearing cable, and the two open rod ends of the V-shaped supporting rod are connected to the connection between the secondary beam and the main beam.

6. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to any one of claims 1 to 5, characterized in that: A tuned mass damper is provided below the pressure-bearing bridge deck.

7. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 1 is characterized in that: The top end of the end support column is connected to a newly constructed reaction force support structure or an existing structure modified reaction force support structure through a ground cable member.

8. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 1 is characterized in that: The flexible cable net structure system comprises ridge side cables, side cables in the large span direction and distributed stabilizing cables; The top end of the swing support column is connected to the top end of the end support column through the ridge cable.

9. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 8 is characterized in that: The A-shaped support column is provided with an outwardly extending short column, which is connected to the side cable in the large span direction and is used to provide middle support for the side cable in the large span direction. The side cable in the large span direction is horizontal or approximately horizontal.

10. The pedestrian bridge adopting a spatial string support structure and provided with a semi-rigid tension canopy structure according to claim 1 is characterized in that: The end support column and the swing support column are both inclined in a direction away from the A-shaped support column.

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