Spatial combination high-altitude suspension pedestrian landscape suspension bridge

Abstract

A spatial combination high-altitude suspension pedestrian landscape suspension bridge comprises a bridge body which is fixedly connected between building structural bodies. The bridge main body comprises at least two main landscape platforms, the main landscape platforms are connected with a main channel, and the main channel is an access channel for viewers; at least one overhanging viewing platform is arranged on the periphery of the main landscape platform, a first viewing channel is arranged between the main landscape platform and the overhanging viewing platform, the overhanging viewing platform is connected with the next main viewing platform through a second viewing channel, the main viewing platforms are located on the same horizontal plane, and the centers of the main landscape platforms are located on the same straight line. The lower portion of the main landscape platform is connected with main cables, wind-resistant cables are arranged on the two sides of the bridge body, and stay cables are arranged between the main cables and the wind-resistant cables. According to the high-altitude suspension pedestrian landscape suspension bridge, the sightseeing function and the landscape function are combined, the structure is stable, and multi-layer viewing experience is provided.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge design, and in particular relates to a spatially combined high-altitude suspended pedestrian landscape suspension bridge. Background Art

[0002] As a key element in scenic spots, viewing platforms not only give tourists a unique experience of looking far and wide, but also become an important landscape to attract tourists with their unique shape and structural design. However, with the vigorous development of the tourism industry and the continuous improvement of tourists' experience requirements, the traditional viewing platform design has gradually revealed its limitations, especially in terms of carrying capacity, sensory experience and structural innovation.

[0003] First, the limitation of carrying capacity is a major problem in the current design of viewing platforms. At present, most viewing platforms adopt the design of a single sightseeing corridor extending out of the mountain. This design method restricts the tourist capacity of the sightseeing corridor to a certain extent, making it difficult to meet the viewing needs of a large number of tourists during the peak tourist season. At popular scenic spots, tourist congestion occurs frequently, which seriously affects the overall sightseeing experience.

[0004] Secondly, the single design and insufficient sensory experience are also urgent problems to be solved by traditional viewing platforms. Conventional viewing platforms often lack changes and levels in design, making it difficult to bring tourists a rich and diverse sensory experience. In the increasingly fierce competition in the tourism market, improving the tourist experience has become the key to the development of scenic spots, and as an important node in scenic spots, the design innovation of viewing platforms is particularly important and urgent.

[0005] In addition, the obsolescence of the suspension bridge structure is also a major bottleneck restricting the development of modern tourist attractions. The traditional suspension bridge structure is single and outdated, and it is difficult to meet the demand for novelty and uniqueness of modern tourist attractions. As an effective way to connect different viewing points, the structural innovation of the suspension bridge is not only related to the safety and beauty of the bridge itself, but also directly affects the tourists' travel experience and visual enjoyment.

[0006] Therefore, in response to the above problems and challenges, the present invention aims to design a spatial combination high-altitude suspended pedestrian landscape suspension bridge. This design will break the traditional plane structure and bring unprecedented visual effects and unique sightseeing experience to tourists through innovative spatial combination methods. At the same time, the design will also fully consider the requirements of carrying capacity, sensory experience and structural innovation, in order to promote the innovation and development of scenic spot viewing platform design while meeting the diverse needs of tourists. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a spatially combined high-altitude suspended pedestrian landscape suspension bridge.

[0008] The present invention is implemented as follows: a spatially combined high-altitude suspended pedestrian landscape suspension bridge, characterized in that it includes a bridge body, the bridge body is fixedly connected between a building structure or a natural rock mass;

[0009] The bridge body includes at least two main viewing platforms, which are connected to a main channel, which is connected to a building structure or a natural rock mass, and is an entrance and exit channel for tourists; at least one cantilevered viewing platform is arranged around the main viewing platform, a first viewing channel is arranged between the main viewing platform and the cantilevered viewing platform, and the cantilevered viewing platform is connected to the next main viewing platform through a second viewing channel, the main viewing platforms are located on the same horizontal plane, and the centers of the main viewing platforms are located on the same straight line, the main cables are connected below the main viewing platforms, wind-resistant cables are arranged on both sides of the bridge body, and inclined cables are arranged between the main cables and the wind-resistant cables.

[0010] Preferably, the plane where the cantilevered viewing platform is located and the plane where the main viewing platform is located are located on different spatial planes.

[0011] Preferably, there are two cantilevered viewing platforms, one of which is located below the main viewing platform; the other cantilevered viewing platform is located above the main viewing platform and is symmetrically arranged along the center of the main viewing platform.

[0012] Preferably, the cantilevered viewing platform above is connected to the next main viewing platform via a second viewing passage.

[0013] Preferably, the centers of the cantilevered viewing platform in a direction perpendicular to the main body of the bridge are located on the same vertical plane; the centers of the cantilevered viewing platform are located on the same curved surface, and the curved surface coincides with the center of the wind-resistant cable.

[0014] Preferably, a plurality of supporting hangers are provided below the cantilevered viewing platform, and the lower ends of the supporting hangers are connected to wind-resistant cables.

[0015] Preferably, the lower end of each supporting hanger is connected to the same point of the wind-resistant cable, and the upper end of the supporting hanger is connected to the cantilevered viewing platform.

[0016] Preferably, the main viewing platform includes a main frame, the edge of the main frame is provided with a main viewing enclosure or guardrail, and a main viewing platform support platform is provided at the bottom of the main frame, and the main viewing platform support platform is fixedly connected to the first viewing channel and the second viewing channel.

[0017] Preferably, the cantilevered viewing platform comprises a cantilevered frame, the edge of the cantilevered frame is provided with a cantilevered landscape enclosure or guardrail, and the bottom of the cantilevered frame is provided with a cantilevered supporting platform, which is fixedly connected to the first viewing channel and the second viewing channel.

[0018] The advantages and technical effects of the present invention are as follows: the present invention is mainly reflected in structural stability and safety, optimization of viewing experience, design flexibility and space utilization and visual effects, unique advantages of cantilevered viewing platform design, and wind resistance, etc., providing tourists with a safer, more comfortable and pleasant viewing experience.

[0019] First, in terms of structural stability and safety, this technology significantly enhances the overall structural stability and safety of the viewing platform through the carefully designed main frame, cantilever frame, main viewing platform support platform and cantilever support platform. In addition, the main cable plus wind-resistant cable combination is adopted, so that the main components connected to it form a force-bearing whole. This design effectively resists the effects of various forces such as external wind pressure and tourist load, ensuring the stable operation of the viewing platform under various environmental conditions, thereby ensuring the personal safety of tourists.

[0020] Secondly, in terms of optimizing the viewing experience, the design of the main landscape enclosure and the cantilevered landscape enclosure not only provides necessary safety guarantees for tourists, but also guides tourists' sights through its unique design aesthetics, greatly optimizing the viewing experience. At the same time, the reasonable setting of the first viewing channel and the second viewing channel enables tourists to easily reach different locations of the viewing platform and fully appreciate the diverse landscapes, meeting tourists' needs for convenience and comfort.

[0021] Furthermore, the technology also performs well in terms of design flexibility and space utilization. The modular design concept allows the structural form of the main frame and cantilever frame to be flexibly adjusted according to the actual site conditions and viewing requirements. This design flexibility not only helps to achieve the harmonious unity of the viewing platform and the surrounding environment, but also makes full use of limited space resources through the reasonable layout of the support platform and viewing channel, improves space utilization, and realizes efficient use of land resources.

[0022] In addition, the application of three-layer explosion-proof glass also adds a lot to the technical effect. Using modern materials such as three-layer explosion-proof glass as the support platform and fence not only meets the requirements of structural safety, but also gives the viewing platform a unique perspective suspension effect, enhancing the overall aesthetics and visual impact. This three-layer explosion-proof glass application not only enhances the sense of technology and the times of the viewing platform, but also provides tourists with a more shocking viewing experience.

[0023] The design of the cantilevered viewing platform is a highlight of this technology. By setting the cantilevered viewing platform on a plane different from the main viewing platform, the layering and spatial depth of the viewing are increased. This design expands the viewing range, allowing visitors to get closer to nature and gain a wider field of vision. At the same time, the application of the cantilevered structure also reflects the innovation of the structural design.

[0024] Finally, this technology also shows significant advantages in terms of wind resistance and construction convenience. The center of the cantilevered viewing platform coincides with the center of the wind-resistant cable, which helps to evenly distribute the structural force and improve the wind resistance of the bridge. At the same time, the combined use of supporting hangers and wind-resistant cables further enhances the wind resistance of the cantilevered viewing platform. These designs not only improve the safety of the structure, but also bring convenience to construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a top view of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 It is a three-dimensional model diagram of the whole bridge;

[0028] Figure 4 It is the normal stress envelope diagram of the steel beam of the whole bridge under various load combinations (unit: MPa);

[0029] Figure 5 It is the shear stress envelope diagram of the steel beam of the whole bridge under various load combinations (unit: MPa);

[0030] Figure 6 is the stress envelope diagram of the cable under the most unfavorable combination (unit: MPa);

[0031] Figure 7 is the deformation diagram of the whole bridge under the condition of full crowd load (unit: mm);

[0032] Figure 8 is the deformation diagram of the whole bridge under wind load (unit: mm);

[0033] Fig. 9 is the first-order mode diagram of the full bridge;

[0034] Fig.10 is the second-order modal diagram of the full bridge;

[0035] Fig.11 is the third-order modal diagram of the full bridge;

[0036] Fig.12 is the fourth-order modal diagram of the full bridge;

[0037] Fig.13 is the fifth-order modal diagram of the full bridge;

[0038] Fig.14 is the fifth-order modal diagram of the full bridge;

[0039] Fig.15 It is a schematic diagram of the node locations at the bridge support;

[0040] Fig.16is the full-bridge Fx reaction diagram (unit: kN);

[0041] Fig.17 is the full-bridge Fy reaction diagram (unit: kN);

[0042] Fig.18 is the full-bridge Fz reaction diagram (unit: kN).

[0043] In the figure, 10, bridge body; 11, main passage; 20, main viewing platform; 21, main frame; 22, main viewing enclosure; 23, main viewing platform support platform; 30, cantilevered viewing platform; 31, cantilevered frame; 32, cantilevered viewing enclosure; 33, cantilevered supporting platform; 40, first viewing passage; 41, second viewing passage; 50, main cable; 60, wind-resistant cable; 70, inclined cable. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] See also Figure 1 and Figure 2 A spatial combination high-altitude suspended pedestrian landscape suspension bridge includes a bridge body 10, wherein the bridge body is fixedly connected between a building structure or a natural rock mass, and the building structure can be a distribution center built on a mountain, serving as a starting point or end point for tourists to board the cable bridge, and can also be directly connected to a stepping ladder or a rest platform;

[0046] The bridge body includes at least two main viewing platforms 20, which are connected to a main passage 11, which is an entrance and exit passage for tourists; at least one cantilevered viewing platform 30 is arranged around the main viewing platform, a first viewing passage 40 is arranged between the main viewing platform and the cantilevered viewing platform, and the cantilevered viewing platform is connected to the next main viewing platform through a second viewing passage 41. The main viewing platforms are located on the same horizontal plane, and the centers of the main viewing platforms are located on the same straight line. A main cable 50 is connected below the main viewing platform, and wind-resistant cables 60 are arranged on both sides of the bridge body, and a stay cable 70 is arranged between the main cable and the wind-resistant cable.

[0047] Technical effect of spatial combination high-altitude suspended pedestrian landscape suspension bridge

[0048] 1. Connection between the bridge body and the building structure

[0049] Technical effect of the structure: The main body of the bridge is fixedly connected between the building structures (pylons or mountains). This design ensures the stability and safety of the bridge. Through reasonable connection methods and structural design, the main body of the bridge can withstand the effects of various external forces such as tourists and wind loads, ensuring the normal use of the bridge.

[0050] Technical effect of spatial design concept: Combining the main body of the bridge with the building structure not only enhances the integrity of the bridge, but also makes the bridge blend into the surrounding environment, forming a harmonious and unified landscape effect. This design is conducive to improving the overall beauty of the scenic area and enhancing the immersion of tourists.

[0051] 2. Design of the main viewing platform and main passage

[0052] Technical effect of structure: As the main gathering area for tourists, the design of the main viewing platform needs to consider the carrying capacity and stability. As the entrance and exit channel for tourists, the main passage needs to ensure smooth and safe passage. Through reasonable structural layout and material selection, it can be ensured that the main viewing platform and the main passage remain stable when carrying a large number of tourists.

[0053] Technical effect of spatial design concept: The reasonable layout of the main viewing platform and the main passage helps to guide the flow of tourists and avoid congestion. At the same time, the design of the main viewing platform can integrate landscape elements, such as greening and seats, to enhance the rest experience of tourists. The design of the main passage focuses on the combination of traffic efficiency and aesthetics to create a comfortable traffic environment for tourists.

[0054] 3. Design of cantilevered viewing platform and viewing passage

[0055] Technical effect of the structure: The cantilevered viewing platform is connected to the main viewing platform through the first viewing channel, and then connected to the next main viewing platform through the second viewing channel. This design increases the layering and spatial changes of the viewing platform. The cantilevered structure needs to pay special attention to its stress performance and stability. Through reasonable structural design, it can be ensured that the cantilevered viewing platform will not have safety accidents when carrying tourists.

[0056] Technical effect of spatial design concept: The design of the cantilevered viewing platform breaks the plane layout of the traditional viewing platform, providing tourists with a viewing experience from more angles. At the same time, the design of the viewing passage focuses on spatial guidance and visual extension, allowing tourists to fully appreciate the surrounding natural scenery and cultural landscapes while walking. This design helps to enhance tourists' interest and satisfaction.

[0057] 4. Arrangement of main cables, wind-resistant cables and stay cables

[0058] Technical effect of the structure: As the main load-bearing structure of the bridge, the main cable must be arranged to take into account the overall force performance and stability of the bridge. The setting of wind-resistant cables helps to enhance the wind resistance of the bridge and ensure the safety of the bridge under strong winds. The stay cables further improve the overall stiffness and stability of the bridge by connecting the main cables and wind-resistant cables. The reasonable arrangement and coordinated work of these components jointly ensure the structural safety and service life of the bridge.

[0059] Technical effect of spatial design concept: The arrangement of main cables, wind-resistant cables and stay cables not only meets the requirements of bridge structure, but also forms a unique visual landscape. The smooth lines and beautiful shapes of these cable structures complement the main body of the bridge and add a beautiful landscape to the scenic area. At the same time, the design of these cable structures also reflects the scientific and technological content and innovative spirit of modern bridge engineering, which helps to improve the overall quality and image of the scenic area.

[0060] The plane where the cantilevered viewing platform is located is on a different spatial plane from the plane where the main viewing platform is located; there are two cantilevered viewing platforms, one of which is located below the main viewing platform; the other cantilevered viewing platform is located above the main viewing platform and is symmetrically arranged along the center of the main viewing platform; the cantilevered viewing platform located above is connected to the next main viewing platform through a second viewing channel.

[0061] This technical feature brings about many technical effects, which are analyzed as follows:

[0062] 1. Space Utilization and Expansion

[0063] Increase the viewing level: By setting the cantilevered viewing platform on a plane different from the main viewing platform, the viewing level and spatial depth are increased. Visitors can enjoy different landscapes at different heights and angles, which enhances the viewing experience.

[0064] Expand the viewing range: The design of the cantilevered viewing platform allows tourists to get closer to nature, especially in natural scenic spots such as mountains and canyons. The cantilevered design can overcome terrain restrictions and allow tourists to gain a wider field of view.

[0065] 2. Structural design and stability

[0066] Structural innovation: This design breaks the plane layout of the traditional viewing platform and reflects the innovation of the structural design.

[0067] Enhanced stability: Although the cantilever structure increases the complexity of the design, reasonable structural design can ensure the stability of the cantilevered viewing platform. By accurately calculating the stress of the cantilevered part, it can ensure that the viewing platform remains safe and stable when subjected to external forces such as tourist loads and wind loads.

[0068] 3. Visual Experience and Landscape Effect

[0069] Rich visual experience: The cantilevered viewing platform is not on the same plane as the main viewing platform, forming a unique visual landscape. Visitors can feel the changes in space and the transformation of scenery while walking, which increases the fun and appreciation of the tour.

[0070] Enhance the interactivity of the landscape: The design of the cantilevered viewing platform allows visitors to interact more closely with the landscape. Visitors can communicate with the landscape on different planes and feel the charm and flavor of the landscape.

[0071] The centers of the cantilevered viewing platforms are located on the same vertical plane in the direction perpendicular to the main body of the bridge; the centers of the cantilevered viewing platforms are located on the same curved surface, and the curved surface coincides with the center of the wind-resistant cable. This technical feature brings the following significant technical effects, as follows:

[0072] Spatial layout optimization:

[0073] The center of the cantilevered viewing platform is located on the same vertical plane. This layout makes the viewing platform present an orderly arrangement in space, enhancing the overall beauty and harmony.

[0074] At the same time, since they are located on the same curved surface, this design further improves the rationality of space utilization and makes the viewing platform more integrated with the surrounding environment.

[0075] Structural force balance:

[0076] The center of the cantilevered viewing platform coincides with the center of the wind-resistant cable, which helps to evenly distribute the structural force. As an important supporting structure of the bridge body, the wind-resistant cable has its center position coincident with the center of the cantilevered viewing platform, which can make the external forces such as wind load more evenly transmitted to the bridge body, thereby improving the stability of the overall structure.

[0077] Improved wind resistance:

[0078] Since the center of the cantilevered viewing platform coincides with the center of the wind-resistant cable, this design also helps to improve the wind resistance of the bridge. When wind load acts on the bridge, the wind-resistant cable can effectively resist wind pressure and reduce the shaking of the bridge body, thus ensuring the safety and stability of the cantilevered viewing platform.

[0079] Construction convenience:

[0080] This technical feature also facilitates construction. Since the center of the cantilevered viewing platform is located on the same vertical plane and curved surface, the position of each viewing platform can be located more accurately during construction, reducing construction difficulty and errors and improving construction efficiency.

[0081] In summary, this technical feature has brought significant technical effects to the design of the bridge body and cantilevered viewing platform by optimizing spatial layout, balancing structural stress, improving wind resistance and facilitating construction. These effects have jointly improved the overall performance and aesthetics of the bridge, providing tourists with a safer, more comfortable and enjoyable viewing experience.

[0082] Preferably, a plurality of support hangers 31 are provided below the cantilevered viewing platform, and the lower ends of the support hangers are connected to the wind-resistant cables 60. The arrangement of the support hangers can disperse the weight and load of the cantilevered viewing platform to multiple points, rather than relying on only a few connection points. This method of dispersing force helps to reduce the concentration of force at a single point, effectively reducing deformation under crowd load or wind load, thereby improving the stability of the overall structure.

[0083] Enhanced wind resistance: The combination of wind-resistant cables and supporting booms can significantly enhance the wind resistance of the cantilevered viewing platform. Under the action of wind, the wind-resistant cables can absorb and disperse wind loads, reduce the shaking and deformation of the viewing platform caused by wind pressure, and ensure the safety and stability of the viewing platform.

[0084] The design of the supporting hangers and wind-resistant cables makes the structural layout of the cantilevered viewing platform more flexible and diverse. Designers can adjust the number, position and length of the supporting hangers, as well as the arrangement of the wind-resistant cables according to actual needs, in order to achieve the best structural performance and visual effect; Lightweight design: By reasonably setting the supporting hangers and wind-resistant cables, lightweight design can be achieved while ensuring structural stability. Lightweight design helps to reduce material usage and construction difficulty, reduce engineering costs, and is also beneficial to environmental protection and sustainable development. Preferably, the present invention has at least two supporting hangers, the lower end of each supporting hanger is connected to the same point of the wind-resistant cable, and the upper end of the supporting hanger is connected to the cantilevered viewing platform.

[0085] The main viewing platform 20 includes a main frame 21, a main landscape enclosure 22 is provided on the edge of the main frame, a main viewing platform support platform 23 is provided at the bottom of the main frame, and the main viewing platform support platform is fixedly connected to the first viewing channel 40 and the second viewing channel 41. The cantilevered viewing platform 30 includes a cantilevered frame 31, a cantilevered landscape enclosure 32 is provided on the edge of the cantilevered frame, a cantilevered support platform 33 is provided at the bottom of the cantilevered frame, and the cantilevered support platform is fixedly connected to the first viewing channel and the second viewing channel. Explosion-proof glass can be laid on the above-mentioned main viewing platform support platform and cantilevered support platform to increase the perspective effect, and the shapes of the main frame and cantilevered frame can be; The main technical features mainly have the following characteristics:

[0086] By designing the main frame and cantilever frame as the main load-bearing structure of the viewing platform, combined with the stable setting of the main viewing platform support platform and the cantilever support platform, the overall structural stability and safety of the viewing platform are significantly enhanced. This design effectively resists the effects of various forces such as external wind pressure and tourist load, ensuring the stable operation of the viewing platform under various environmental conditions and protecting the personal safety of tourists.

[0087] The carefully arranged main landscape enclosure and cantilevered landscape enclosure not only provide necessary safety guarantees for tourists, but also guide tourists' sight through their design aesthetics, greatly optimizing the viewing experience. At the same time, the reasonable setting of the first viewing channel and the second viewing channel enables tourists to easily reach different locations of the viewing platform and fully appreciate the diverse landscapes, meeting tourists' needs for convenience and comfort. For example, the idea of ​​using modern materials such as three-layer explosion-proof glass as support platforms and fences. This material selection not only meets the requirements of structural safety, but also gives the viewing platform a unique perspective suspension effect, enhancing the overall aesthetics and visual impact. This innovative material application not only enhances the sense of technology and the times of the viewing platform, but also provides tourists with a more shocking viewing experience.

[0088] The modular design concept allows the structural form of the main frame and cantilever frame to be flexibly adjusted according to the actual site conditions and viewing requirements. This design flexibility not only helps to achieve the harmonious unity of the viewing platform and the surrounding environment, but also makes full use of limited space resources through the reasonable layout of the support platform and viewing channel, improves space utilization, and realizes efficient use of land resources.

[0089] Experimental items of the present invention:

[0090] The bridge adopts the structural system of a suspension bridge, which is mainly supported by two main cables under the main viewing platform. At the same time, three-dimensional wind-resistant cables are set to increase the lateral and vertical stiffness. The calculated span is 380m, the net width of the main bridge ends is 7.0m, the diameter of the main viewing platform is 21m, the diameter of the cantilevered viewing platform is 16m, and the net width at the connecting ladder is 4.0m.

[0091] The main viewing platform, cantilevered viewing platform, viewing passage and main passages at both ends of the bridge all adopt continuous steel box girder structure, and the material used is Q460C. The main viewing platform beam is 1.8m high, the cantilevered viewing platform beam is 1.0m high, the main passage steel beam is 1.5m high, and the cantilevered beam of the viewing passage gradually increases in height from 1.8 to 1.0m.

[0092] 1. Design methods and process

[0093] The bridge superstructure analysis uses the finite element calculation program "Midas Civil" to calculate the bridge.

[0094] 2. Design parameters

[0095] Engineering materials

[0096] Q460C grade steel is used in the model, and its mechanical parameters are as follows:

[0097] Elastic modulus: 2.06×10 5 MPa.;

[0098] Shear modulus: 7.9×10 4 MPa;

[0099] Poisson's ratio: 0.3;

[0100] Linear expansion coefficient: 1.2×10 -5 / ℃;

[0101] Density: ρ = 7.85 × 10 3 kg / m 3 ;

[0102] The design strength value of the steel structure of Q460C with a thickness of 40﹤t≦63mm is 355Mpa, and the design value of shear strength is 205MPa; the design strength value of the steel structure of Q460C with a thickness of 16﹤t≦40mm is 390Mpa, and the design value of shear strength is 225MPa; the design strength value of the steel structure of Q460C with a thickness of t≦16mm is 410MPa, and the design value of shear strength is 235Mpa.

[0103] 2.2.Dead load

[0104] First-stage constant load: Steel bulk density is 78.5kN / m 3 ;

[0105] Phase II paving: The weight of the bridge deck glass paving is 2.5kN / m 2 ;

[0106] Railing weight: 1.0kN / m on one side;

[0107] Counterweight: The effective weight is set to maintain transverse balance and increase impedance.

[0108] 2.3. Crowd load

[0109] This bridge is positioned as a pedestrian bridge.

[0110] 1) Crowd load: calculated according to Article 3.1.3 of the Technical Specifications for Urban Pedestrian Bridges and Underpasses (CJJ69-95): W = (5-2 × (100-20) / 80) × (20-2) / 20 = 2.7 kPa.

[0111] 2.4. Effect of temperature

[0112] The uniform temperature change is determined according to the provisions of 4.3.12 of the General Specifications for Design of Highway Bridges and Culverts (JTG D60-2015). Taking the warm area as an example, the design construction temperature is 20℃, the highest temperature is 46℃, and the lowest temperature is -9℃. The calculated temperature difference is +26℃ and -29℃.

[0113] 2.5. Wind load

[0114] Wind load According to the provisions of 3.1.9 of the Technical Specifications for Urban Pedestrian Bridges and Pedestrian Tunnels (CJJ 69-95), the basic wind pressure value once in 100 years is: 0.50kN / m 2 .

[0115] 2.6. Load combinations

[0116] According to Article 4.1.5 of the General Specifications for Highway Bridge and Culvert Design, the load combinations and coefficients are shown in Table 1:

[0117] Table 1 Load combination and coefficient table

[0118]

[0119] 3.Superstructure verification

[0120] 3.1. Model diagram

[0121] The structural analysis uses the finite element calculation program "MidasCivil", taking into account the loads of deadweight, second-phase dead load, temperature rise and fall of the overall steel structure, wind load and crowd load, and analyzing the dynamic characteristics of the overall structure. According to the load combination requirements, check whether each content meets the requirements of the specification. The main parts of the verification include: strength, overall stability, deflection, natural frequency, etc. The steel beam is simulated by beam units, and the main cable, wind-resistant cable and supporting hanger are simulated by cable units. See details Figure 3 3D model of the entire bridge.

[0122] 3.2. Strength verification

[0123] like Figures 4 to 6As shown in the figure, under the most unfavorable combined load, the maximum positive stress of the steel beam is 272.2MP, and the maximum shear stress of the steel beam is 55.0MP. According to the "Steel Structure Design Standard" (GB50017-2017), the steel structure strength design value of Q460C with a thickness of 40﹤t≦63mm is 355Mpa, and the shear strength design value is 205MPa; the steel structure strength design value of Q460C with a thickness of 16﹤t≦40mm is 390Mpa, and the shear strength design value is 225MPa; the steel structure strength design value of Q460C with a thickness of t≦16mm is 410MPa, and the shear strength design value is 235Mpa. The maximum stress of the cable is 804.9MPa. According to the "Design Specifications for Highway Suspension Bridges" (JTGT D65-05-2015), the design value of the tensile strength of 1770 galvanized high-strength steel wire is 956.8MPa, so the structure meets the strength requirements.

[0124] 3.3. Structural deformation under moving loads

[0125] According to the "Design Specifications for Highway Suspension Bridges" (JTGT D65-05—2015), the maximum allowable vertical deflection of a suspension bridge calculated by moving load is L / 250, and the maximum allowable lateral displacement calculated by crosswind load is L / 150.

[0126] like Figures 7-8 As shown in the figure, the maximum deflection of the whole bridge under the crowd load is 740.2mm, and the allowable deflection of the span less than 380m is 1520mm; the maximum deflection of the whole bridge under the wind load is 82.4mm, and the allowable deflection of the span less than 380m is 2533.3mm, that is, the deformation of the structure under the movement meets the requirements of the specification.

[0127] 3.4. Calculation of natural frequency

[0128] In the analysis of structural dynamic characteristics, the natural frequency and vibration mode of the structure are the most basic dynamic characteristics. The dynamic calculation results of this design are as follows:

[0129] Table 2 Full-bridge dynamic characteristic characteristic value analysis table

[0130]

[0131]

[0132]

[0133] Fig. 9 This is the first-order modal diagram. The vibration mode is overall torsional vibration, and the natural frequency is 0.31 Hz. Fig.10 This is the second-order mode diagram. The vibration mode shows overall symmetrical vertical vibration, and the natural frequency is 0.33Hz. Fig.11This is the third-order mode diagram. The vibration mode shows overall symmetrical lateral vibration, and the natural frequency is 0.35Hz. Fig.12 This is the fourth-order mode diagram. The vibration mode shows overall antisymmetric vertical vibration, and the natural frequency is 0.40Hz. Fig.13 This is the third-order modal diagram, and the vibration mode is an overall antisymmetric lateral vibration with a natural frequency of 0.52 Hz. As shown in Table 2, the natural frequencies of the first 65 modes of the structure are all low. According to Article 2.5.4 of the Technical Specifications for Urban Pedestrian Overpasses and Pedestrian Underpasses (CJJ69-1995), the vertical natural frequency of the upper structure of a pedestrian bridge should not be less than 3 Hz. Therefore, it is necessary to conduct a human-induced vibration analysis on the structure with vertical and lateral natural frequencies in the sensitive range of the bridge, and design the corresponding vibration reduction system based on the acceleration response and modal analysis results under the action of pedestrian excitation loads so that its vibration acceleration meets the relevant comfort requirements.

[0134] 3.5. Stability verification

[0135] like Fig.14 As shown in the figure, under the basic combined action envelope, the main cables, wind-resistant cables and hangers are all in a stable tensile state. The minimum tensile stress is 36.1 MPa at the hanger, and there is no compressive instability.

[0136] 3.6. Summary of support reaction forces

[0137] (1) Figures 15 to 18 As shown, the calculation results of the full bridge support reaction force are as follows, and the detailed data are shown in Table 3:

[0138] Table 3 Summary of full bridge reaction force

[0139]

[0140] Summary: The finite element calculation program "MidasCivil" was used to perform a structural analysis of the spatial combination high-altitude suspended pedestrian landscape suspension bridge. The loads considered include deadweight, second-phase paving, second-phase railings, counterweights, overall steel structure temperature rise and fall, wind loads, and crowd loads, and the dynamic characteristics of the overall structure were analyzed. After verification, the structural strength, deflection, and overall stability all meet the requirements of the corresponding specifications. Considering that the bridge structure is relatively soft and the natural vibration frequency of the structure is low, it is necessary to design a corresponding vibration reduction system in the later stage so that wind vibration and human-induced vibration meet the relevant comfort requirements. At the same time, the tension at the anchor end of the main cable of the bridge is large, and higher requirements are also placed on the anchor foundation and the geology of the bridge site. In short, the bridge structure of the present invention meets the design requirements of the bridge.

[0141] In summary, the multi-dimensional space suspension bridge of the present invention provides a series of unique walking experiences, which combine innovative design, visual shock and psychological challenge to create an unforgettable adventure for tourists. The following is a detailed summary of these unique walking experiences:

[0142] High-altitude suspension feeling: Multi-dimensional space suspension bridges usually use high-strength tempered glass. This transparent material allows visitors to clearly see the abyss or valley under their feet. Walking on it, visitors will have a feeling as if they are suspended in the air, which is both stimulating and exciting.

[0143] Complex space exploration: Different from traditional straight or simple curved plank roads, the multi-dimensional space suspension bridge provides visitors with a novel experience of traveling and exploring in space through space designs such as height difference and walking paths. Each step may lead to a new height or direction, making the walking process full of unknowns and surprises.

[0144] Panoramic view: Due to the multi-dimensional layout of the plank road, visitors can enjoy the surrounding natural scenery from multiple angles while walking. Whether it is the magnificence of mountains and rivers, the lushness of forests or the tranquility of lakes, they can all be seen from a new perspective.

[0145] Psychological challenges and overcoming: For many tourists, walking on the transparent suspension bridge is a psychological challenge. However, it is this challenge that prompts people to overcome their inner fears, and when they finally stand on the plank road and overlook the scenery below, they will feel an unprecedented sense of accomplishment and self-confidence.

[0146] Rich functional experience: Multi-dimensional space suspension bridges often have viewing platforms, rest areas and other functional areas in different locations. These designs not only provide a place to rest, but also create more diverse experience spaces for tourists, such as taking photos, enjoying the scenery or participating in interactive activities.

[0147] In summary, the multi-dimensional space suspension bridge, with its unique design and innovative elements, brings tourists a walking experience that combines excitement, exploration, sightseeing and psychological challenges. This experience not only enriches the activities of the tourist attraction, but also becomes a highlight to attract tourists.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, such as the number of main viewing platforms, the cantilever height of the cantilevered viewing platform, the size of the main viewing platform and the cantilevered viewing platform, and the selection of structural materials shall be designed according to actual conditions; the main frame of the main viewing platform and the main frame of the cantilevered viewing platform adopt structural styles and shapes such as square, circular, elliptical, hexagonal and other regular geometric shapes or special-shaped structures, shall all be included in the protection scope of the present invention.

Claims

1. A spatial combination high-altitude suspended pedestrian landscape suspension bridge, characterized by: It includes a bridge body, wherein the bridge body is fixedly connected between a building structure or a natural rock mass; The bridge body includes at least two main viewing platforms, which are connected to a main channel, which is connected to a building structure or a natural rock mass, and is an entrance and exit channel for tourists; at least one cantilevered viewing platform is arranged around the main viewing platform, a first viewing channel is arranged between the main viewing platform and the cantilevered viewing platform, and the cantilevered viewing platform is connected to the next main viewing platform through a second viewing channel, the main viewing platforms are located on the same horizontal plane, and the centers of the main viewing platforms are located on the same straight line, the main cables are connected below the main viewing platforms, wind-resistant cables are arranged on both sides of the bridge body, and inclined cables are arranged between the main cables and the wind-resistant cables.

2. According to claim 1, the spatial combination high-altitude suspended pedestrian landscape suspension bridge is characterized by: The plane where the cantilevered viewing platform is located and the plane where the main viewing platform is located are located on different spatial planes.

3. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 2 is characterized by: There are two cantilevered viewing platforms, one of which is located below the main viewing platform; the other cantilevered viewing platform is located above the main viewing platform and is symmetrically arranged along the center of the main viewing platform.

4. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 3 is characterized by: The cantilevered viewing platform above is connected to the next main viewing platform through a second viewing passage.

5. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 3 is characterized by: The centers of the cantilevered viewing platform in a direction perpendicular to the main body of the bridge are located on the same vertical plane; the centers of the cantilevered viewing platform are located on the same curved surface, and the curved surface coincides with the center of the wind-resistant cable.

6. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 1 is characterized by: A plurality of supporting hangers are arranged below the cantilevered viewing platform, and the lower ends of the supporting hangers are connected to wind-resistant cables.

7. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 6 is characterized by: The lower end of each supporting hanger is connected to the same point of the wind-resistant cable, and the upper end of the supporting hanger is connected to the cantilevered observation deck.

8. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 1 is characterized by: The main viewing platform comprises a main frame, the edge of which is provided with a main viewing enclosure or guardrail, and a main viewing platform support platform is provided at the bottom of the main frame, and the main viewing platform support platform is fixedly connected to the first viewing channel and the second viewing channel.

9. The spatial combination high-altitude suspended pedestrian landscape suspension bridge according to claim 1 is characterized by: The cantilevered viewing platform comprises a cantilevered frame, the edge of the cantilevered frame is provided with a cantilevered viewing enclosure or guardrail, the bottom of the cantilevered frame is provided with a cantilevered supporting platform, and the cantilevered supporting platform is fixedly connected to the first viewing channel and the second viewing channel.

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