Method and device for building factory pre-camber of truss and computer program product

Abstract

The invention relates to the technical field of steel-concrete double-layer swivel bridges, in particular to a factory pre-camber construction method and device of a truss and a computer program product. The method comprises the following steps: constructing an initial Warn truss with vertical rods; an arching original point is selected from the large nodes, the main control triangles located on the same side of the arching original point are sequentially rotated from the arching original point, and coordinates of the adjusted large nodes and coordinates of the adjusted upper vertexes are obtained; based on the adjusted coordinates of the large nodes and the adjusted coordinates of the upper vertexes, the upper end coordinates of the adjusted large node straight web members are obtained; based on the adjusted coordinates of the large nodes and the pre-camber corresponding to the small nodes, the adjusted coordinates of the small nodes are obtained; and based on the adjusted coordinate of the large node, the coordinate of the upper vertex, the upper end coordinate of the large node straight web member and the coordinate of the small node, the adjustment values and the adjusted lengths of the lower chord, the left diagonal web member, the right diagonal web member, the upper chord, the small node straight web member and the large node straight web member are obtained. The method has the advantages of high precision and simple calculation.

Description

Technical Field

[0001] The present invention relates to the technical field of steel-concrete double-deck rotating bridges, and in particular to a method and device for constructing factory-made pre-camber of a truss, and a computer program product. Background Art

[0002] Compared with the traditional double-layer steel truss, the lower concrete structure of the steel-concrete double-layer rotating bridge replaces the steel lower chord and the orthotropic steel bridge deck. First, it meets the stress state during the rotation construction process, giving full play to the advantages of the good compressive performance of concrete, avoiding the increase of the plate thickness of the lower steel structure near the support point, saving steel; second, the maintenance workload of the lower concrete beam is small, meeting the requirements for good structural durability and less maintenance and repair workload in the later period. The technical difficulties of the steel-concrete double-layer rotating bridge are reflected in: strong spatiality and complex stress; many system conversions, the structure is a T-structure during the rotation, and it is a continuous beam system after the bridge is completed; the stress of the steel-concrete node is complex, the positioning accuracy of the steel structure is strict, and the quality of concrete pouring is high.

[0003] Although the rotation construction technology is becoming more and more mature, the problem of unreasonable pre-camber setting is inevitable in the bridge rotation construction process. The pre-camber setting of the current Warren truss bridge project with vertical bars is obtained through multiple trial calculations and iterations based on geometric electric algorithms, which is time-consuming and labor-intensive, and the number of bar manufacturing length adjustments given is large, which restricts the factory processing and manufacturing efficiency and the pre-assembly accuracy in the factory. Summary of the invention

[0004] In order to solve the problems of complex calculation of factory-made pre-camber of large-span steel trusses and difficult control of installation line shape, the present invention provides a method, device and computer program product for constructing factory-made pre-camber of trusses, which can accurately calculate the coordinates of truss nodes and quickly obtain the expansion and contraction amount and manufacturing length of each rod.

[0005] According to the present invention, a factory-made pre-camber construction method for a Warren truss with vertical rods, wherein the Warren truss with vertical rods includes a plurality of main control triangles arranged continuously, the main control triangle includes a lower chord located at the base, a left diagonal web and a right diagonal web located at the waist, and a small node straight web located at the height of the base; the left vertex and the right vertex of the main control triangle are both large nodes, and the intersection of the lower chord of the main control triangle and the small node straight web is the small node; an upper chord is provided between the upper vertices of adjacent main control triangles, and a large node straight web is provided at the large node perpendicular to the upper chord; It includes: Construct the initial Warren truss with vertical bars; The arch origin is selected from the large node, and the main control triangle located on the same side of the arch origin is rotated in sequence from the arch origin to obtain the coordinates of the adjusted large node and the coordinates of the upper vertex; when the main control triangle is rotated, the large node near the arch origin is used as the rotation center, and the offset value of the large node far from the arch origin in the height direction is maintained to achieve the corresponding pre-arch degree; Based on the coordinates of the adjusted large node and the coordinates of the adjusted upper vertex, the upper end coordinates of the adjusted large node straight web are obtained; Based on the coordinates of the adjusted large node and the pre-camber corresponding to the small node, the coordinates of the adjusted small node are obtained; Based on the coordinates of the adjusted major node, the coordinates of the upper vertex, the upper end coordinates of the major node straight web and the coordinates of the minor node, the adjustment values ​​and adjusted lengths of the lower chord, left diagonal web, right diagonal web, upper chord, minor node straight web and major node straight web are obtained.

[0006] Preferably, the step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the middle large node, the intersection of the angle bisector of the angle formed by the adjacent right diagonal web member and left diagonal web member at the corresponding large node and the line connecting the adjacent upper vertices at the corresponding large node is used as the upper end coordinate of the straight web member of the adjusted large node; among which, the middle large node is the large node other than the starting large node and the ending large node.

[0007] Preferably, the step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the starting large node, add an offset equal to the length of the large node straight web in the initial Warren truss with vertical rods to the ordinate of the starting large node to obtain the upper end coordinate of the adjusted large node straight web; wherein, the starting large node is the large node where the arch origin is located.

[0008] Preferably, the step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the ending large node, the coordinates of the ending large node are offset upward along the extension direction of the small node straight web of the main control triangle where the ending large node is located, by an offset equal to the length of the small node straight web of the main control triangle where the ending large node is located, and the upper end coordinates of the adjusted large node straight web are taken; among which, the ending large node is the large node farthest from the arch origin side.

[0009] Preferably, the step of obtaining the coordinates of the adjusted small nodes based on the coordinates of the adjusted large nodes and the pre-camber corresponding to the small nodes comprises: Based on the coordinates of the adjusted large node, the initial coordinates of the adjusted small node are obtained; The ordinate in the initial coordinates of the small node is replaced by the pre-camber corresponding to the small node to obtain the coordinates of the adjusted small node.

[0010] Preferably, the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web are obtained based on the coordinates of the adjusted large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node, including: Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the small nodes, the adjusted length of the corresponding lower chord is obtained; Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the upper vertex, the adjusted lengths of the corresponding left diagonal web member and the right diagonal web member are obtained; Based on the coordinates of the upper end and the upper vertex of the adjacent adjusted large node straight web member, the adjusted length of the corresponding upper chord member is obtained; Based on the coordinates of the adjacent adjusted upper vertices and the coordinates of the small nodes, the adjusted length of the corresponding small node straight web is obtained; Based on the coordinates of the adjacent adjusted large nodes and the upper end coordinates of the large node straight web member, the adjusted length of the corresponding large node straight web member is obtained.

[0011] Preferably, the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web are obtained based on the coordinates of the adjusted large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node, including: Based on the adjusted lengths of the bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web and their lengths in the initial Warren truss with vertical bars, the adjustment values ​​of the corresponding bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web are obtained.

[0012] In addition, the present invention also provides a factory-made pre-camber construction device for a Warren truss with a vertical rod, which comprises: A collection unit, used for collecting the size parameters, arch origin information and pre-arch information of the initial Warren truss with vertical rods; A calculation unit is used to obtain the adjustment values ​​and adjusted lengths of the bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web based on the size parameters, the camber origin information and the pre-camber information of the initial Warren truss with vertical rods by using any of the above methods; and The output unit is used to output the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web.

[0013] Preferably, the calculation unit includes a coordinate calculation unit and a length calculation unit.

[0014] In addition, the present invention also provides a computer program product, which includes a computer program, and the computer program implements any of the above methods when executed by a processor.

[0015] The present invention has the following beneficial effects: Based on the geometric cambering method, the present invention can obtain the length of the rod between each node through the node coordinate data of each node after adjustment, so that the small node can also reach the position of the theoretical pre-camber, and realizes the setting of the theoretical pre-camber of the small node; The method proposed in the present invention can be preferably applied to Warren trusses, Warren trusses with spaced vertical bars and Warren trusses with vertical bars, and has strong versatility; compared with conventional calculation methods such as geometric numerical calculations, this method is suitable for self-compiled Excel algorithms or other programs, and the calculation is simple and the accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an initial Warren truss with vertical rods in a specific embodiment of the present invention; Figure 2 It is a schematic diagram of the pre-camber setting of the initial Warren truss with vertical rods in a specific embodiment of the present invention; Figure 3 It is a schematic diagram of rotating the master control triangle in a specific implementation manner of the present invention; Figure 4 is a schematic diagram of rotating another master control triangle in a specific implementation manner of the present invention; Figure 5 It is a schematic diagram of a Warren truss with vertical rods after the main control triangle is rotated in a specific embodiment of the present invention; Figure 6 It is a schematic diagram of a Warren truss with vertical bars after the upper chord node and the lower chord large node are adjusted in a specific embodiment of the present invention; Figure 7 It is a schematic diagram of a Warren truss with vertical bars after the small node of the lower chord is adjusted in a specific embodiment of the present invention; Figure 8 The figure is a schematic diagram of calculating the coordinates of related nodes in a specific implementation manner of the present invention. DETAILED DESCRIPTION

[0017] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0018] For long-span continuous steel trusses, the setting of pre-arch is particularly important. The factory-made pre-arch directly determines the installation line shape and the bridge line shape. Construction pre-arch must be set during the installation of large-span steel trusses and system conversion to resist the deformation caused by the first-phase constant load and meet the linear shape and internal force requirements in the system conversion. The current geometric arching methods such as the triangular arching method are to rotate the main control triangle so that the large node of the Warren truss is located at the theoretical pre-arch. However, for Warren trusses with vertical rods, the position of the small node after arching is usually not on the line connecting the two adjacent large nodes. Arching by the geometric arching method can only make the large node at the theoretical arching position, and cannot make the small node reach the theoretical arching position.

[0019] The present invention studies the factory-made pre-arch setting method of Warren trusses with vertical rods based on the current triangular arch method, which can provide parameters such as truss node coordinates, rod expansion and contraction amount and manufacturing length by improving the triangular arch method.

[0020] by Figure 1 Taking the Warren truss with vertical rods as an example, in a specific embodiment of the present invention, a factory-made pre-camber construction method for a Warren truss with vertical rods is provided; the Warren truss with vertical rods includes a plurality of main control triangles arranged continuously, the main control triangles include a lower chord located at the bottom, a left diagonal web member and a right diagonal web member located at the waist, and a small node straight web member located at the height of the bottom; namely △A1B2A3, △A3B4A5, △A5B6A7, △A7B8A9, △A9B10A 11 and △A11B12A13 are main control triangles; wherein the left vertex and the right vertex of the main control triangle are both large nodes, and the intersection of the lower chord of the main control triangle and the small node straight web is the small node; there is an upper chord between the upper vertices of adjacent main control triangles, and a large node straight web is provided at the large node perpendicular to the upper chord; that is, A1, A3, A5, A7, A9, A11 and A13 are large nodes, and A2, A4, A6, A8, A10 and A12 are small nodes; the method comprises the following steps: Construct the initial Warren truss with vertical bars (i.e. Figure 1 shown); Figure 1 In the figure, the connection nodes of the upper chord are B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12 and B13, among which B2, B4, B6, B8, B10 and B12 are the upper vertices of the corresponding main control triangle; B1, B3, B5, B7, B9, B11 and B13 are the connection nodes between the upper ends of the corresponding large-node straight webs and the upper chord.

[0021] The arch origin is selected from the large node, and the main control triangle located on the same side of the arch origin is rotated in sequence from the arch origin to obtain the coordinates of the adjusted large node and the coordinates of the upper vertex; when the main control triangle is rotated, the large node near the arch origin is used as the rotation center, and the offset value of the large node far from the arch origin in the height direction is maintained to achieve the corresponding pre-arch degree; See Figure 2 , the arch origin 0 corresponds to the large node A7, and the pre-camber of each node at the lower chord is a, b, c, d, e and f in the direction away from the arch origin; See Figure 3 First, rotate △A1B2A3. At this time, draw circle O1 with large node A7 as the rotation center, draw auxiliary line ray L1 to the right with A7 as the origin, translate L1 upward by b (node ​​A9 is used for pre-camber treatment) to get L2, then draw circle O1 with A7 as the center and the length of A7A9 as the radius, the intersection of circle O1 and L2 is A9', rotate the main control triangle A7B8A9 to A7B8'A9'; See Figure 4 and 5 Based on the above method, the rotation of △A7B8A9, △A9B10A11 and △A11B12A13 can be realized in sequence to obtain the rotated main control triangles △A7B8'A9', △A9'B10'A11' and △A11'B12'A13'; Figure 4 In the figure, O2 is an auxiliary circle with A9' as the center and line segment A9'A11 as the radius, and L3 is an auxiliary line obtained by translating L1 upward by d (pre-camber of A11 node treatment).

[0022] Based on the coordinates of the adjusted large node and the coordinates of the adjusted upper vertex, the upper end coordinates of the adjusted large node straight web are obtained; Based on the coordinates of the adjusted large node and the pre-camber corresponding to the small node, the coordinates of the adjusted small node are obtained; Based on the coordinates of the adjusted major node, the coordinates of the upper vertex, the upper end coordinates of the major node straight web and the coordinates of the minor node, the adjustment values ​​and adjusted lengths of the lower chord, left diagonal web, right diagonal web, upper chord, minor node straight web and major node straight web are obtained.

[0023] Based on the geometric arch method, the present invention can obtain the length of the rod between each node through the node coordinate data of each node after adjustment, so that the small node can also reach the position of the theoretical pre-arch, thereby realizing the setting of the theoretical pre-arch of the small node.

[0024] Wherein, the acquisition of the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the middle large node, the intersection of the angle bisector of the angle formed by the adjacent right diagonal web member and left diagonal web member at the corresponding large node and the line connecting the adjacent upper vertices at the corresponding large node is used as the upper end coordinate of the straight web member of the adjusted large node; among which, the middle large node is the large node other than the starting large node and the ending large node.

[0025] Wherein, the acquisition of the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the starting large node, add an offset equal to the length of the large node straight web in the initial Warren truss with vertical rods to the ordinate of the starting large node to obtain the upper end coordinate of the adjusted large node straight web; wherein, the starting large node is the large node where the arch origin is located.

[0026] Wherein, the acquisition of the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the ending large node, the coordinates of the ending large node are offset upward along the extension direction of the small node straight web of the main control triangle where the ending large node is located, by an offset equal to the length of the small node straight web of the main control triangle where the ending large node is located, and the upper end coordinates of the adjusted large node straight web are taken; among which, the ending large node is the large node farthest from the arch origin side.

[0027] See Figure 6 , draw angle bisectors ∠B8'A9'B10' and B10'A11'B12', connect B8'B10' and B10'B12' and intersect the angle bisectors at points B9' and B11' respectively, draw line segment A7B7 with a length of H vertically upward from A7, draw line segment B12'B13'∥A12'A13' connecting A13'B13'; the theoretical pre-camber of the major nodes (A9', A11', A13') can be achieved by adjusting the length of the upper chord and the straight web at the major nodes.

[0028] The step of obtaining the coordinates of the adjusted small nodes based on the coordinates of the adjusted large nodes and the pre-camber corresponding to the small nodes includes: Based on the coordinates of the adjusted large node, the initial coordinates of the adjusted small node are obtained; The ordinate in the initial coordinates of the small node is replaced by the pre-camber corresponding to the small node to obtain the coordinates of the adjusted small node.

[0029] See Figure 7, extend the lower end of each straight web member until the lower end of the straight web member reaches the corresponding pre-camber, and then adjust the intersection position of each lower chord and the lower end of the straight web member to adjust the pre-camber at the small node. It can be seen that the nodes A8-A13 are adjusted to A8'- A13', the nodes B8-B13 are adjusted to B8'-B13', and the nodes A7 and B7 remain unchanged before and after adjustment.

[0030] The method of obtaining the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web based on the coordinates of the adjusted large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node includes: Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the small nodes, the adjusted length of the corresponding lower chord is obtained; Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the upper vertex, the adjusted lengths of the corresponding left diagonal web member and the right diagonal web member are obtained; Based on the coordinates of the upper end and the upper vertex of the adjacent adjusted large node straight web member, the adjusted length of the corresponding upper chord member is obtained; Based on the coordinates of the adjacent adjusted upper vertices and the coordinates of the small nodes, the adjusted length of the corresponding small node straight web is obtained; Based on the coordinates of the adjacent adjusted large nodes and the upper end coordinates of the large node straight web member, the adjusted length of the corresponding large node straight web member is obtained.

[0031] See Figure 8 , for any master triangle , which after adjustment is ;in, is the lower left corner, and To adjust the upper vertices before and after, and To adjust the lower right corner point before and after; The length of the chord is L, the length of the straight web is H, and the length of the diagonal web is K. ; The pre-camber at , master triangle The rotation angle is , , for Precamber at the main control triangle The angle between the left diagonal brace and the lower chord is , ; Establish a plane rectangular coordinate system and control the triangle The coordinates of the relevant points are, , , , , and , where 2<i<n, i and n are both positive integers; After adjustment The coordinates of the relevant points are , ,

[0032] It can be seen that the coordinates of the relevant large nodes after adjustment are, ; ; ; ; ; .

[0033] Among them, after adjustment, the upper node of the middle large node The coordinates of are, ; ; Among them, 1<i<n-1.

[0034] Among them, the upper node of the starting large node after adjustment and the upper node of the ending large node The coordinates of are, ; ; ; ; in, is the coordinate of the large node where the arch origin is located, The upper node of the ending large node The coordinates of the first upper chord node on the left and the rotation angle of the main control triangle corresponding to the final large node.

[0035] Among them, the small nodes finally obtained for, ; ; in, is the pre-camber adjustment value at the small node; ; and are the pre-camber degrees at the corresponding nodes respectively.

[0036] The method of obtaining the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web based on the coordinates of the adjusted large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node includes: Based on the adjusted lengths of the bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web and their lengths in the initial Warren truss with vertical bars, the adjustment values ​​of the corresponding bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web are obtained.

[0037] When it is known, based on the two-point distance formula, the adjusted length of the relevant rod can be obtained, and then the adjustment value can be obtained.

[0038] The method proposed in the present invention can be preferably applied to Warren trusses, Warren trusses with spaced vertical bars and Warren trusses with vertical bars, and has strong versatility; compared with conventional calculation methods such as geometric numerical calculations, this method is suitable for self-compiled Excel algorithms or other programs, and the calculation is simple and the accuracy is high.

[0039] In addition, in another specific embodiment of the present invention, a factory-made pre-camber construction device for a Warren truss with a vertical rod is provided, which comprises: A collection unit, used for collecting the size parameters, arch origin information and pre-arch information of the initial Warren truss with vertical rods; A calculation unit is used to obtain the adjustment values ​​and adjusted lengths of the bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web based on the size parameters, the arch origin information and the pre-arch information of the initial Warren truss with vertical rods by using the above method; and The output unit is used to output the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web.

[0040] The calculation unit includes a coordinate calculation unit and a length calculation unit. The coordinate calculation unit can be used to perform the above-mentioned coordinate calculation, and the length calculation unit can be used to perform the distance calculation between two points.

[0041] In addition, in another specific embodiment of the present invention, a computer program product is provided, which includes a computer program. When the computer program is executed by a processor, the above method is implemented.

[0042] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0043] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for constructing a factory-made pre-cambered Warren truss with vertical rods, wherein the Warren truss with vertical rods comprises a plurality of continuously arranged main control triangles, wherein the main control triangle comprises a lower chord located at the base, a left diagonal web member and a right diagonal web member located at the waist, and a small node straight web member located at the height of the base; the left vertex and the right vertex of the main control triangle are both large nodes, and the intersection of the lower chord of the main control triangle and the small node straight web member is the small node; an upper chord is provided between the upper vertices of adjacent main control triangles, and a large node straight web member is provided at the large node perpendicular to the upper chord; It is characterized in that include: Construct the initial Warren truss with vertical bars; The arch origin is selected from the large node, and the main control triangle located on the same side of the arch origin is rotated in sequence from the arch origin to obtain the coordinates of the adjusted large node and the coordinates of the upper vertex; when the main control triangle is rotated, the large node near the arch origin is used as the rotation center, and the offset value of the large node far from the arch origin in the height direction is maintained to achieve the corresponding pre-arch degree; Based on the coordinates of the adjusted large node and the coordinates of the adjusted upper vertex, the upper end coordinates of the adjusted large node straight web are obtained; Based on the coordinates of the adjusted large node and the pre-camber corresponding to the small node, the coordinates of the adjusted small node are obtained; Based on the coordinates of the adjusted major node, the coordinates of the upper vertex, the upper end coordinates of the major node straight web and the coordinates of the minor node, the adjustment values ​​and adjusted lengths of the lower chord, left diagonal web, right diagonal web, upper chord, minor node straight web and major node straight web are obtained.

2. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 1, characterized in that: The step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the middle large node, the intersection of the angle bisector of the angle formed by the adjacent right diagonal web member and left diagonal web member at the corresponding large node and the line connecting the adjacent upper vertices at the corresponding large node is used as the upper end coordinate of the straight web member of the adjusted large node; among which, the middle large node is the large node other than the starting large node and the ending large node.

3. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 1, characterized in that: The step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the starting large node, add an offset equal to the length of the large node straight web in the initial Warren truss with vertical rods to the ordinate of the starting large node to obtain the upper end coordinate of the adjusted large node straight web; wherein, the starting large node is the large node where the arch origin is located.

4. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 1, characterized in that: The step of obtaining the upper end coordinates of the adjusted large node straight web based on the adjusted large node coordinates and the adjusted upper vertex coordinates includes: For the ending large node, the coordinates of the ending large node are offset upward along the extension direction of the small node straight web of the main control triangle where the ending large node is located, by an offset equal to the length of the small node straight web of the main control triangle where the ending large node is located, and the upper end coordinates of the adjusted large node straight web are taken; among which, the ending large node is the large node farthest from the arch origin side.

5. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 1, characterized in that: The step of obtaining the coordinates of the adjusted small nodes based on the coordinates of the adjusted large nodes and the pre-camber corresponding to the small nodes includes: Based on the coordinates of the adjusted large node, the initial coordinates of the adjusted small node are obtained; The ordinate in the initial coordinates of the small node is replaced by the pre-camber corresponding to the small node to obtain the coordinates of the adjusted small node.

6. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 1, characterized in that: The method of obtaining the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web based on the adjusted coordinates of the large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node comprises: Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the small nodes, the adjusted length of the corresponding lower chord is obtained; Based on the coordinates of the adjacent adjusted large nodes and the coordinates of the upper vertex, the adjusted lengths of the corresponding left diagonal web member and the right diagonal web member are obtained; Based on the coordinates of the upper end and the upper vertex of the adjacent adjusted large node straight web member, the adjusted length of the corresponding upper chord member is obtained; Based on the coordinates of the adjacent adjusted upper vertices and the coordinates of the small nodes, the adjusted length of the corresponding small node straight web is obtained; Based on the coordinates of the adjacent adjusted large nodes and the upper end coordinates of the large node straight web member, the adjusted length of the corresponding large node straight web member is obtained.

7. The method for constructing a factory-made pre-camber for a Warren truss with vertical rods according to claim 6, characterized in that: The method of obtaining the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web based on the adjusted coordinates of the large node, the coordinates of the upper vertex, the upper end coordinates of the large node straight web and the coordinates of the small node comprises: Based on the adjusted lengths of the bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web and their lengths in the initial Warren truss with vertical bars, the adjustment values ​​of the corresponding bottom chord, the left diagonal web, the right diagonal web, the top chord, the small node straight web and the large node straight web are obtained.

8. A factory-made pre-camber construction device for a Warren truss with vertical rods, characterized in that: include: A collection unit, used for collecting the size parameters, arch origin information and pre-arch information of the initial Warren truss with vertical rods; A calculation unit, for obtaining the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web based on the size parameters, the arch origin information and the pre-arch information of the initial Warren truss with vertical rods, using any method described in claims 1 to 7; as well as The output unit is used to output the adjustment values ​​and adjusted lengths of the lower chord, the left diagonal web, the right diagonal web, the upper chord, the small node straight web and the large node straight web.

9. The factory-made pre-camber construction device for a Warren truss with vertical rods according to claim 8, characterized in that: The calculation unit includes a coordinate calculation unit and a length calculation unit.

10. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 7.

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