Arched cable-stayed combined beam column structure and construction method thereof

Abstract

The invention relates to the technical field of landscape bridges, and discloses an arch-shaped cable-stayed combined beam column structure and a construction method of the arch-shaped cable-stayed combined beam column structure. The middle of the main beam is connected with the top of the pier column; a main arch ring; the number of the arch feet is two, the two arch feet are arranged at the two ends of the main arch ring respectively, and the arch feet are connected with the two ends of the main beam respectively; a first web member; when loads such as a vehicle are generated on the top face of the main beam, horizontal thrust independently balanced by the axial tension of the main beam is offset by the bending moment and the shearing force of the pier column; the main arch ring connected with the web member exerts upward supporting force on the main beam, large hogging moment is prevented from being generated at the joint of the main beam and the pier column in the T-shaped structure, the main beam, the pier column, the main arch ring and the web member form a beautiful shape similar to a big banyan tree on the vertical face, and the comprehensive performance of large span, low height, high adaptability and unique landscape effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of landscape bridge, in particular to an arch-shaped cable-stayed composite beam column structure and a construction method thereof. BACKGROUND

[0002] Box girder structure has wide application advantages in highway bridge, municipal bridge and railway bridge construction due to its visual simplicity, large bending stiffness and torsional stiffness. Cast-in-situ reinforced concrete continuous box girder and steel box girder can better adapt to line type and can realize variable-width bridge, skew bridge and ramp bridge with small curve radius, so they are particularly widely used in urban bridge engineering. However, cast-in-situ reinforced concrete box girder and prestressed reinforced concrete box girder both have the problem of large self-weight, and 60% to 80% of the bearing capacity is used to bear the self dead load. In order to meet the requirement of bending bearing capacity of the bridge, the cross-section height of the equal cross-section continuous box girder usually needs to be 1 / 15 to 1 / 18 of the span. In urban bridge design, the building height of the superstructure is often strictly limited, which makes it difficult for ordinary cast-in-situ concrete box girder to meet the design requirements. At this time, although steel box girder structure can be used as a substitute, the steel box girder often has insufficient structural stiffness due to the too small cross-section height, which affects the driving comfort and structural durability.

[0003] As an old and classic bridge type, arch bridge is still widely used in modern bridge construction. The arch bridge has the feature of upwardly convex curved arch ring structure. When bearing vertical load, the load is transmitted to the arch ring through the arch above the building, and the transmission path along the arch ring to the two arch feet is obliquely downward. According to the principle of mechanics, the obliquely transmitted force must have a horizontal component, i.e. the horizontal thrust of the arch bridge, which produces axial pressure in the arch, greatly reduces the bending moment in the middle span, and makes the material strength of the main arch section fully utilized, thereby improving the spanning capacity of the structure. However, the abutment must provide an equal and opposite horizontal reaction to balance this thrust, which makes the arch bridge have high requirements for the bearing capacity and stability of the foundation, and arch bridges are not suitable for construction in poor geological areas.

[0004] In summary, the traditional box girder bridge cannot simultaneously meet the requirements of large span and low building height, and the arch bridge is subject to the harsh conditions of the horizontal thrust on the foundation. Therefore, it has become a technical problem to be solved urgently in urban bridge construction to provide a bridge structure which can effectively balance the horizontal thrust inside the structure, adapt to poor geological conditions, and realize large span and low height. SUMMARY

[0005] The purpose of the present application is to provide a bridge structure which can effectively balance the horizontal thrust inside the structure, adapt to poor geological conditions, and realize large span and low height.

[0006] In order to achieve the above purpose, the present application provides an arch-shaped cable-stayed composite beam column structure, comprising: The pier column is vertically arranged; The main beam is horizontally arranged, and the middle part of the main beam is connected with the top of the pier column; The main arch ring is arranged above the main beam; The arch foot is provided with two arch feet, and the two arch feet are arranged at two ends of the main arch ring respectively, and each arch foot is connected with two ends of the main beam respectively; The first web rod is provided with a plurality of first web rods, one end of each first web rod is connected with the main arch ring, and the other end of each first web rod is connected with the main beam; The pier is provided with two piers, and the top of the two piers is connected with the bottom of each arch foot respectively.

[0007] Preferably, the main beam comprises a root section located in the middle and a cantilever section located on both sides; The cross-sectional size of the root section is larger than that of the cantilever section; One end of each first web rod is connected with the main arch ring, and the other end of each first web rod is connected with the root section; The bottom of the root section is fixedly connected with the pier column.

[0008] Preferably, the arch-shaped cable-stayed combined beam column structure further comprises a second web rod, the second web rod is arranged in one-to-one correspondence with the first web rod, one end of the second web rod is connected with the main arch ring, and the other end of the second web rod is connected with the first web rod.

[0009] Preferably, the arch-shaped cable-stayed combined beam column structure further comprises a third web rod, the third web rod is provided with a plurality of third web rods, one end of each third web rod is connected with the main arch ring, and the other end of each third web rod is connected with the cantilever section.

[0010] Preferably, the included angle between the first web rod and the main beam is 30° to 60°, and the included angle between the third web rod and the main beam is 30° to 60°.

[0011] Preferably, the top of the root section is provided with a viewing platform.

[0012] Preferably, the top of the main arch ring is paved with a solar panel, and the bottom of the main arch ring is provided with a plurality of illuminating lamps.

[0013] The application also provides a construction method for the arch-shaped cable-stayed combined beam column structure, comprising the following steps: S1, constructing the lower structure such as pile foundation, pier, pier column, etc. in the engineering site, erecting temporary support, constructing the main beam, and field consolidating the middle part of the main beam with the top end of the pier column; S2, erecting temporary support on the top of the main beam with the main beam as the support, installing the main arch ring, and connecting the two ends of the first web rod with the main arch ring and the main beam respectively; S3, removing all temporary supports; S4, constructing bridge deck pavement and auxiliary facilities.

[0014] Preferably, when the prestressed reinforced concrete structure is used as the material of the arch cable-stayed composite beam column structure, the construction of the main beam in step S1 specifically comprises: embedding a corrugated pipe in the main beam, threading a prestressed steel strand in the corrugated pipe, tensioning and anchoring the prestressed steel strand, and sealing the anchor after grouting in the corrugated pipe.

[0015] Preferably, step S2 further comprises: connecting two ends of the second web bar with the main arch ring and the corresponding first web bar respectively, and connecting two ends of the third web bar with the main arch ring and the main beam respectively.

[0016] Compared with the prior art, the arch cable-stayed composite beam column structure provided by the embodiment of the present application has the following beneficial effects: When the main beam top surface has a load such as a vehicle, the load is transmitted to the main arch ring through the web bar, the main arch ring is stressed to cause horizontal thrust at the arch foot, but the main beam functions as a tie beam, the main beam is in tension, and the horizontal thrust is offset. Since the middle part of the main beam is connected with the pier column, when the main beam tends to move left or right due to tension, the pier column will exert a horizontal constraint reaction force on the main beam, which is equal in size and opposite in direction. The horizontal thrust balanced by the axial tension of the main beam is offset by the bending moment and shear force of the pier column, thereby reducing the axial tension of the main beam. In addition, since the main arch ring is connected with the main beam through the web bar, when the main beam bears a vertical load, the web bar is in tension, the main arch ring connected with the web bar exerts an upward supporting force on the main beam, and the neutral point changes, thereby avoiding a large negative bending moment at the connection between the main beam and the pier column in the T-shaped structure.

[0017] Since the axial tension of the main beam structure and the negative bending moment at the connection with the pier column are shared by other structures, the cross-sectional thickness of the main beam structure does not need to be very thick to resist the two forces. Therefore, under the condition of the same building height, the total span of the arch cable-stayed composite beam column structure can be more than twice that of the ordinary beam-arch composite structure or the T-shaped structure. Conversely, under the condition of a certain total span, the building height (main arch ring height and main beam thickness, etc.) of the arch cable-stayed composite beam column structure can be lighter and more delicate than that of the ordinary beam-arch composite structure or the T-shaped structure. At the same time, the main beam, the pier column, the main arch ring, and the web bar form a beautiful shape similar to a large banyan tree in the elevation. The connection design of the main beam and the pier column not only ensures the stability of the structure but also creates a unique landscape effect, which is particularly suitable for urban environments with high landscape requirements. The structure has a larger adaptive span than the ordinary beam-arch composite structure or the T-shaped structure, and realizes the comprehensive performance of large span, low height, strong adaptability, and unique landscape effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the arch cable-stayed composite beam column structure provided by the embodiment of the present application; Figure 2 is a sectional view along A-A in Figure 1 Figure 3 is a schematic view of the operation after the sectioning of Figure 1 Figure 4 is a distribution schematic view of the first and second rainwater collecting pipes in the arched cable-stayed composite beam column structure provided by the embodiment of the present application; Figure 5 is a distribution schematic view of the bellows in the arched cable-stayed composite beam column structure provided by the embodiment of the present application; Figure 6 is a step S1 schematic view when the prestressed reinforced concrete structure is used as the material of the arched cable-stayed composite beam column structure in the embodiment of the present application; Figure 7 is a step S2 schematic view when the prestressed reinforced concrete structure is used as the material of the arched cable-stayed composite beam column structure in the embodiment of the present application; Figure 8 is a step S3 schematic view when the prestressed reinforced concrete structure is used as the material of the arched cable-stayed composite beam column structure in the embodiment of the present application; Figure 9 is a step S4 schematic view when the prestressed reinforced concrete structure is used as the material of the arched cable-stayed composite beam column structure in the embodiment of the present application.

[0019] In the figure, 1, pier column; 2, main beam; 21, root section; 22, cantilever section; 3, main arch ring; 4, arch foot; 5, first web; 6, second web; 7, third web; 8, pier; 9, viewing platform; 10, solar panel; 11, lighting lamp; 12, bellows; 13, first rainwater collecting pipe; 14, second rainwater collecting pipe; 15, temporary support. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0021] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] ​​It should be understood that the terms "first," "second," etc., are used in this invention to describe various types of information, but these terms are not limited to them; they are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides an arched cable-stayed composite beam-column structure, comprising: Pier 1, pier 1 is set vertically; Main beam 2 is placed horizontally, and its middle part is connected to the top of pier column 1. The main arch ring 3 is positioned above the main beam 2; There are two arch feet 4, which are respectively located at both ends of the main arch ring 3, and each arch foot 4 is connected to both ends of the main beam 2. First web member 5, there are multiple first web members 5, one end of each first web member 5 is connected to the main arch ring 3, and the other end of each first web member 5 is connected to the main beam 2; There are two piers 8, and the tops of the two piers 8 are respectively connected to the bottoms of the arch feet 4.

[0025] The middle part of the main beam 2 is rigidly fixed with the top of the pier column 1, and a stable T-shaped structure is formed; meanwhile, above the main beam 2, the main arch ring 3 is rigidly connected with the end part of the main beam 2 through the arch foot 4 at the two ends of the main arch ring 3 and is connected with the middle part of the main beam 2 through a plurality of first web bars 5 arranged along the longitudinal direction, so that the main beam 2 and the main arch ring 3 are closely coordinated through the arch foot 4 and the web bar system, and the beam-arch combined structure is formed; if only the middle part of the main beam 2 is rigidly fixed with the top of the pier column 1 to form a simple T-shaped structure, the middle part of the main beam 2 is fixed on the pier column 1, and the two ends are suspended, when the main beam 2 bears the vertical load, a large negative bending moment is generated at the connecting part of the main beam 2 and the pier column 1 at the top of the pier column 1, and with the increase of the span, the thickness of the section of the main beam 2 needs to be significantly increased to resist the negative bending moment, so the span of the T-shaped structure should not be too large; if the pier column 1 structure is not arranged to form a simple beam-arch combined structure, when the main beam 2 bears the vertical load, the load is transmitted to the main arch ring 3 through the first web bar 5, the section of the main arch ring 3 is compressed and a horizontal thrust is generated at the arch foot 4, since the main beam 2 is rigidly fixed with the arch foot 4 on the two sides, the main beam 2 can provide a tensile force equal in size and opposite in direction to the horizontal thrust of the arch foot 4, at this time, the main beam 2 plays a role of tie beam, so that the horizontal force forms a closed loop inside the structure, solving the horizontal force problem of the arch foot 4 in the traditional arch bridge structure, but this result is often accompanied by the increase of the span, and the thickness of the section of the main beam 2 needs to be very thick, or the main arch ring 3 needs to be very high, which is difficult to be applied in urban bridges.

[0026] But the present application combines the T-shaped structure with the beam-arch combined structure, and produces a synergistic effect of "1+1>2" in the stress system: When there is a load such as a vehicle on the top surface of the main beam 2, the load is transmitted to the main arch ring 3 through the web bar, and the arch foot 4 generates a horizontal thrust after the main arch ring 3 is stressed, but the main beam 2 plays a role of tie beam, the main beam 2 is in tension and offsets the horizontal thrust, since the middle part of the main beam 2 is connected with the pier column 1, when the main beam 2 tends to move left or right due to tension, the pier column 1 will exert a horizontal constraint reaction force equal in size and opposite in direction to the main beam 2; the horizontal thrust balanced by the axial tension of the main beam 2 is offset by the bending moment and shear force of the pier column 1, reducing the axial tension of the main beam 2; in addition, since the main arch ring 3 of the present application is connected with the main beam 2 through the web bar, when the main beam 2 bears the vertical load, the web bar is in tension, and the main arch ring 3 connected with the web bar exerts an upward supporting force on the main beam 2, so that the neutral point changes, avoiding a large negative bending moment at the connecting part of the main beam 2 and the pier column 1 in the T-shaped structure.

[0027] Since the axial tension of the main beam 2 structure and the negative bending moment at the connection with the pier column 1 are borne by other structures, the cross-sectional thickness of the main beam 2 structure does not need to be made very thick to resist the two forces, so that the total span of the arch-shaped cable-stayed combined beam column structure of the application can be more than twice that of the ordinary beam-arch combined structure or T-shaped structure under the condition of the same building height, and conversely, the building height (the height of the main arch ring 3 and the thickness of the main beam 2, etc.) of the arch-shaped cable-stayed combined beam column structure of the application can be lighter and more delicate than that of the ordinary beam-arch combined structure or T-shaped structure under the condition of the same total span, and meanwhile, the main beam 2, the pier column 1, the main arch ring 3 and the web members form a beautiful shape similar to a large banyan tree in the elevation, and the connection design of the main beam 2 and the pier column 1 not only ensures the structural stability, but also creates a unique landscape effect, which is particularly suitable for urban environments with high landscape requirements; the structure has a larger adaptive span than the ordinary beam-arch combined structure or T-shaped structure, and realizes the comprehensive performance of large span, low height, strong adaptability and unique landscape effect.

[0028] Specifically, as shown in Figure 1 , the cross-sectional size of the main beam 2 gradually increases from both ends to the middle, so that the cross-sectional size of the middle region of the main beam 2 is the largest, so that the local stiffness of the middle region of the main beam 2 connected with the pier column 1 is the largest, and the cross-sectional size of the pier column 1 gradually increases from the pier bottom to the pier top, the pier column 1 is designed as an inverted cone, which enhances the local stiffness of the top of the pier column 1, forms a highly reliable rigid frame node at the connection region of the main beam 2 and the pier column 1, and effectively matches the maximum negative bending moment borne by the region with the increased cross section of the middle of the main beam 2, and the inverted cone design of the pier column 1 makes the top of the pier column 1, which needs to bear the bending moment the most, have a larger sectional resisting moment, so that the stiffness distribution and internal force distribution at the connection of the main beam 2 and the pier column 1 are highly consistent, so that the main beam 2 can more effectively provide the tension to offset the horizontal thrust of the arch foot 4, and the mechanical properties of the T-shaped rigid frame system are strengthened, and the reliability and durability of the rigid frame node are improved.

[0029] Specifically, as shown in Figure 1 , the main beam 2 includes a root section 21 located in the middle and cantilever sections 22 located on both sides; The cross-sectional size of the root section 21 is larger than that of the cantilever sections 22; One end of each first web member 5 is connected with the main arch ring 3, and the other end of each first web member 5 is connected with the root section 21; The bottom of the root section 21 is fixedly connected with the pier column 1.

[0030] The root section 21 with a larger cross-sectional size is fixedly connected with the pier 1, so that the local stiffness of the root area is maximum, the stiffness distribution and internal force distribution of the connection between the main beam 2 and the pier 1 are highly consistent, the main beam 2 can more effectively provide the tensile force to offset the horizontal thrust of the arch spring 4, and the mechanical properties of the T-shaped rigid frame system are strengthened. In addition, the first web 5 is connected to the root section 21, when the main arch ring 3 bears a load, the cross section of the main arch ring 3 is compressed and generates a horizontal thrust, the load is transmitted to the root section 21 with the strongest stiffness through the first web 5, rather than the cantilever section 22 with relatively weak stiffness, and the stress concentration and local deformation problems commonly seen in the connection of webs in traditional structures are effectively avoided.

[0031] Specifically, as shown in Figure 1 The arch-shaped cable-stayed composite beam column structure further comprises second webs 6, the second webs 6 are provided in one-to-one correspondence with the first webs 5, one end of each second web 6 is connected with the main arch ring 3, and the other end of each second web 6 is connected with the first web 5.

[0032] The second webs 6 serve as a secondary support system and form a stable triangular force transmission system with the main webs, effectively dispersing the load transmitted by the main arch ring 3, so that the stress of the main arch ring 3 is more uniform and reasonable, and the problem of local stress concentration of the arch ring in traditional arch bridges is avoided. At the same time, the second webs 6 provide lateral support for the first webs 5, greatly improving the buckling resistance and stability of the first webs 5 and preventing the first webs 5 from losing stability when bearing pressure.

[0033] Specifically, as shown in Figure 1 The arch-shaped cable-stayed composite beam column structure further comprises third webs 7, a plurality of third webs 7 are provided, one end of each third web 7 is connected with the main arch ring 3, and the other end of each third web 7 is connected with the cantilever section 22.

[0034] The cantilever section 22 is the part of the main beam 2 farthest from the pier 1 and usually bears a large positive bending moment, and the third webs 7 establish a direct force transmission path between the main arch ring 3 and the cantilever section 22, so that part of the load can be directly transmitted to the main arch ring 3 through the third webs 7, effectively reducing the bending moment and deflection of the cantilever section 22. At the same time, the third webs 7 and the first webs 5 form a complementary force transmission system, the first webs 5 mainly connect the root section 21 with high stiffness to balance the horizontal thrust of the arch spring 4, and the third webs 7 provide support according to the stress characteristics of the cantilever section 22, so that the stress of each cross section of the main beam 2 is more uniform and reasonable.

[0035] Specifically, the angle between the first web 5 and the main beam 2 is 30° to 60°, and the angle between the third web 7 and the main beam 2 is 30° to 60°.

[0036] Specifically, the top of the root section 21 is provided with a viewing platform 9. Since the viewing platform 9 is arranged at the top of the root section 21 of the main girder 2, that is, directly below the main arch ring 3 and higher than the area of the main girder 2 where vehicles or pedestrians pass, this special position provides an excellent viewing field, enabling pedestrians to enjoy the surrounding environment in all directions, and is particularly suitable for use in places such as urban landscape bridges and scenic area bridges that have high requirements for viewing functions; the main arch ring 3 above naturally forms a roof structure that provides shade and rain protection, enabling the viewing platform 9 to be used normally under various weather conditions, greatly improving the comfort and practicality of use; and the viewing platform 9 is arranged at the root section 21 of the main girder 2, which has the largest cross-sectional size and the strongest stiffness, and can safely bear the additional load of the viewing platform 9.

[0037] Specifically, the top of the main arch ring 3 is paved with a solar panel 10, and the bottom of the main arch ring 3 is provided with a plurality of lighting lamps 11; the solar panel 10 paved on the top of the main arch ring 3 is electrically connected with the lighting lamps 11 at the bottom, forming an independent clean energy lighting system that realizes daytime energy storage and nighttime lighting, and is energy-saving and environmentally friendly.

[0038] Specifically, as shown in Figure 4 , a first rainwater collection pipe 13 is pre-embedded in the main girder 2, and a vertical second rainwater collection pipe 14 is pre-embedded in the pier 1; the second rainwater collection pipe 14 is in communication with the first rainwater collection pipe 13, enabling the centralized discharge of rainwater on the bridge deck, so that the bridge structure can be applied to environmentally sensitive areas that require water source protection.

[0039] Specifically, as shown in Figure 5 , a corrugated pipe 12 is pre-embedded in the main girder 2 to form a prestressed duct, and a prestressed steel tendon is arranged in the corrugated pipe 12.

[0040] Specifically, in the cantilever section 22 of the main girder 2, the corrugated pipe 12 is arranged at the bottom of the cantilever section 22; in the root section 21 of the main girder 2, the corrugated pipe 12 is arranged at the top of the root section 21; the corrugated pipe 12 in the cantilever section 22 and the corrugated pipe 12 in the root section 21 are in communication, so as to resist the positive bending moment of the cantilever section 22 of the main girder 2 and the negative bending moment of the root section 21 of the main girder 2, while improving the shear capacity.

[0041] Specifically, the main arch ring 3 is a smooth curve in the elevation, such as a circular curve, a parabola, or a catenary.

[0042] Specifically, the main girder 2 is a solid-web structure, such as a box girder or a plate girder.

[0043] Specifically, the main arch ring 3 is a solid-web structure, such as a box arch or a plate arch.

[0044] In other embodiments, the main girder 2 can be designed as a curve along the longitudinal length direction, and the projection of the main arch ring 3 on the plane can also be designed as a curve to meet the needs of a curve bridge with a certain radius of curvature.

[0045] In other embodiments, the main arch 3 is a broken line in the elevation.

[0046] In other embodiments, the cross-sectional dimension of the main beam 2 is the same in the longitudinal length direction.

[0047] In other embodiments, the main beam 2 is a hollow structure, such as a truss structure.

[0048] In other embodiments, the main arch 3 is a hollow structure, such as a truss arch and a dumbbell-shaped arch.

[0049] In addition, as shown in Figures 6 to 9 The present application also provides a construction method for the above-mentioned arch-shaped cable-stayed composite beam column structure, comprising the following steps: S1, constructing pile foundation, pier platform 8, pier column 1 and other substructures in the engineering site, erecting temporary supports 15, constructing the main beam 2, and field consolidating the middle part of the main beam 2 with the top end of the pier column 1; S2, erecting temporary supports 15 on the top of the main beam 2 with the main beam 2 as the support, installing the main arch 3, and connecting the two ends of the first web member 5 with the main arch 3 and the main beam 2 respectively, connecting the two ends of the second web member 6 with the main arch 3 and the corresponding first web member 5 respectively, and connecting the two ends of the third web member 7 with the main arch 3 and the main beam 2 respectively; S3, removing all temporary supports 15; S4, constructing bridge deck pavement and auxiliary facilities.

[0050] Specifically, the above-mentioned arch-shaped cable-stayed composite beam column structure provided by the present application does not depend on specific materials in specific implementation, and can adopt steel structure or concrete structure. When adopting concrete structure, ordinary reinforced concrete or prestressed reinforced concrete can be adopted.

[0051] For example, when adopting steel structure as the material of the arch-shaped cable-stayed composite beam column structure, the specific construction process is as follows: CS1, constructing pile foundation, pier platform, pier column and other substructures in the engineering site; and simultaneously welding the upper main beam cantilever section, main beam root section, main arch, first web member, second web member and third web member and other structures in sections and pieces in the steel structure factory; CS2, installing bridge bearings and related embedded parts; CS3, erecting temporary support piers; CS4, on-site hoisting the upper main beam cantilever section, main beam root section, main arch, first web member, second web member and third web member and other structures in sections; CS5, welding the arch-shaped cable-stayed composite beam column structure into a whole; CS6, removing the temporary support piers; CS7, construction of bridge deck pavement, solar panels and other auxiliary works; CS8, operation of the vehicle.

[0052] When the prestressed reinforced concrete structure is used as the material of the arch cable-stayed composite beam column structure, the specific construction process is as follows: CS1, construction of pile foundation, pier, pier column and other substructures in the engineering site; CS2, reinforcement treatment of the foundation and erection of full-frame supports; CS3, pre-pressing of the full-frame supports and adjustment of the elevation of the full-frame supports; CS4, installation of bridge bearings and related embedded parts; CS5, installation of the main beam formwork and binding of the steel bars; CS6, installation of the bellows and threading of the prestressed steel strands in the bellows; CS7, pouring of the main beam concrete; CS8, after the initial setting of the concrete, erection of the full-frame supports on the upper part of the main beam and pre-pressing; CS9, construction of the first web, the second web, the third web and the main arch ring; CS10, concrete curing; CS11, after the concrete age is greater than 7 days and the concrete strength and elastic modulus reach 85% of the design value, the formwork is removed and the prestressed steel strands are tensioned and anchored; CS12, sealing of the anchor after grouting in the bellows; CS13, removal of various full-frame supports; CS14, construction of the bridge deck pavement, viewing platform, solar panels and other auxiliary works; CS15, operation of the vehicle.

[0053] In summary, the embodiment of the application provides an arch cable-stayed composite beam column structure. When the main beam top surface has a load such as a vehicle, the load is transmitted to the main arch ring through the web, the main arch ring is stressed to cause horizontal thrust at the arch foot, but the main beam functions as a tie beam, the main beam is in tension and offsets the horizontal thrust. Since the middle part of the main beam is connected with the pier column, when the main beam tends to move left or right due to the tension, the pier column applies a horizontal constraint reaction force of the same size and opposite direction to the main beam. The horizontal thrust balanced by the axial tension of the main beam is offset by the bending moment and shear force of the pier column, so that the axial tension of the main beam is reduced. In addition, since the main arch ring of the application is connected with the main beam through the web, when the main beam bears a vertical load, the web is in tension, the main arch ring connected with the web applies an upward supporting force to the main beam, so that the neutral point changes and the large negative bending moment at the connection between the main beam and the pier column in the T-shaped structure is avoided.

[0054] Since the axial tension of the main beam structure and the negative bending moment at the connection with the pier column are shared by other structures, the cross section thickness of the main beam structure does not need to be made very thick to resist the two forces, thus, under the condition of the same building height, the total span of the arch-shaped cable-stayed combined beam column structure of the present application can be made more than twice that of the common beam-arch combined structure or T-shaped structure, on the contrary, under the condition of the same total span, the building height (the height of the main arch ring and the thickness of the main beam, etc.) of the arch-shaped cable-stayed combined beam column structure of the present application can be more light and thin than that of the common beam-arch combined structure or T-shaped structure, meanwhile, the main beam, the pier column, the main arch ring and the web member form a beautiful shape similar to a big banyan tree in the elevation, the connection design of the main beam and the pier column not only ensures the structural stability, but also creates a unique landscape effect, which is particularly suitable for the urban environment with high landscape requirements; the structure has a larger adaptive span than the common beam-arch combined structure or T-shaped structure, and realizes the comprehensive performance of large span, low height, strong adaptability and unique landscape effect.

[0055] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. An arched cable-composite beam-column structure, characterized by, The application relates to an arch-shaped cable-stayed combined beam column structure. The arch-shaped cable-stayed combined beam column structure comprises a pier column (1), a main beam (2), a main arch ring (3), two arch feet (4), a plurality of first web bars (5), two pier platforms (8) and a viewing platform (9). The main beam (2) comprises a root section (21) in the middle and cantilever sections (22) on both sides. The cross-sectional size of the root section (21) is larger than that of the cantilever sections (22). The root section (21) is fixedly connected with the pier column (1) at the bottom. The arch-shaped cable-stayed combined beam column structure further comprises second web bars (6) corresponding to the first web bars (5) one by one, one end of each second web bar (6) being connected with the main arch ring (3) and the other end of each second web bar (6) being connected with the first web bar (5). The arch-shaped cable-stayed combined beam column structure further comprises third web bars (7), one end of each third web bar (7) being connected with the main arch ring (3) and the other end of each third web bar (7) being connected with the cantilever section (22).

2. The arched cable-composite beam column structure of claim 1, wherein, The angle between the first web bar (5) and the main beam (2) is 30-60 degrees, and the angle between the third web bar (7) and the main beam (2) is 30-60 degrees. The top of the root section (21) is provided with the viewing platform (9). The top of the main arch ring (3) is paved with solar panels (10), and the bottom of the main arch ring (3) is provided with a plurality of illuminating lamps (11). The arch-shaped cable-stayed combined beam column structure comprises the following steps.

3. The arched cable-composite beam column structure of claim 2, wherein, S1, constructing a pile foundation, a pier platform (8), a pier column (1) and other lower structures on a construction site, erecting temporary supports (15), constructing a main beam (2) and field-welding the middle part of the main beam (2) with the top end of the pier column (1); 4. The arched cable-composite beam column structure of claim 2, wherein, S2, erecting temporary supports (15) on the top of the main beam (2) with the main beam (2) as a support, installing a main arch ring (3) and connecting two ends of the first web bars (5) with the main arch ring (3) and the main beam (2) respectively; 5. The arched cable-composite beam column structure of claim 4, wherein, S3, removing all the temporary supports (15); 6. The arched cable-composite beam column structure of claim 2, wherein, S4, constructing a bridge deck pavement and auxiliary facilities.

7. The arched cable-composite beam column structure of claim 1, wherein, ​ 8. A construction method for the arched cable-composite beam column structure according to any one of claims 1 to 7, characterized by, ​ ​ ​ ​ ​ 9. The construction method of the arch cable-composite beam column structure according to claim 8, characterized by, When the prestressed reinforced concrete structure is used as the material of the arch-shaped cable-stayed composite beam-column structure, the construction of the main beam (2) in the step S1 specifically comprises the following steps: embedding a corrugated pipe in the main beam (2), threading a prestressed steel strand in the corrugated pipe, tensioning and anchoring the prestressed steel strand, and sealing the anchor after grouting in the corrugated pipe.

10. The construction method of the arch cable-composite beam column structure according to claim 8, characterized by, The step S2 further comprises the following steps: connecting two ends of the second web bar (6) with the main arch ring (3) and the corresponding first web bar (5) respectively, and connecting two ends of the third web bar (7) with the main arch ring (3) and the main beam (2) respectively.

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