CN109829254B - Method for drawing positioning line of diaphragm plate after top and bottom plates of curved steel box bridge are unfolded - Google Patents
Method for drawing positioning line of diaphragm plate after top and bottom plates of curved steel box bridge are unfolded Download PDFInfo
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- CN109829254B CN109829254B CN201910207838.0A CN201910207838A CN109829254B CN 109829254 B CN109829254 B CN 109829254B CN 201910207838 A CN201910207838 A CN 201910207838A CN 109829254 B CN109829254 B CN 109829254B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 18
- 238000010586 diagram Methods 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- 238000011161 development Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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Abstract
The invention provides a method for drawing a diaphragm plate positioning line after a top plate and a bottom plate of a curved steel box bridge are unfolded, and belongs to the field of design of curved steel box bridges. The invention solves the problems that the transverse clapboard positioning line is complicated and easy to make mistakes when drawing in the construction drawing deepening design of a curved steel box bridge, and the technical scheme has the key points that: drawing a top and bottom plate curved surface expansion diagram; extracting curve length data between positioning points of every two diaphragm plates, extracting coordinate point (x, y) data of the tops of the polylines of the expansion diagram of the top and bottom plates at the web position, and writing the coordinate point data into a data table; calculating the data table; copying a data column of a 'positioning line' in a data calculation table; and opening the top and bottom plate development picture, inputting a line drawing command, pasting the copied data to a command bar, and finishing the drawing of all partition plate positioning lines. The invention can finish batch drawing of the diaphragm plate positioning line on one top and bottom plate at one time, saves time and improves the accuracy of positioning line drawing.
Description
Technical Field
The invention relates to a drawing technology of a steel box bridge deepening design drawing, in particular to a drawing method of a diaphragm positioning line after a top bottom plate of a curved steel box bridge is unfolded.
Background
In the workshop manufacturing and assembling process of the steel box bridge, a diaphragm positioning mode needs to be selected according to the bridge structure characteristics and the process. When the assembly mode of positioning the diaphragm plates on the top plate and the bottom plate is adopted, the positions of the diaphragm plates need to be calibrated on top and bottom unfolded drawings. For curved steel box bridges, the positions of the transverse partition plates on the top plate and the bottom plate after being unfolded and the positions on a plane projection drawing can generate large differences. In a common method, firstly, a curve distance from each positioning point to an end point of an expansion curve is prepared, then a 'measure' command is used in AutoCAD to draw the positioning points, the distance equal division points drawn by the 'measure' command are many, a first required point needs to be reserved, other unnecessary points are deleted, the steps need to be repeated when each point is drawn, and finally the corresponding two points are connected by a straight line to obtain a positioning line, so that the work of calibrating the position of a diaphragm is very complicated, and errors are easy to occur.
The prior patent technology CN201710878144.0 discloses a method for processing a spatial multi-curved-surface special-shaped steel bridge, which can solve the problems that the processing of a steel bridge with large volume and diversified curved surfaces and the processing of a steel bridge with the ordinary technology which can not meet the curved surface positioning can not be solved, thereby reducing the processing difficulty of the spatial curved-surface special-shaped steel bridge, but can not solve the problem of the positioning line of a transverse clapboard after the top plate and the bottom plate of a curved-surface steel box bridge are unfolded
Disclosure of Invention
The invention aims to provide a method for drawing transverse partition plate positioning lines after the top plate and the bottom plate of a curved steel box bridge are unfolded, and the problems that the transverse partition plate positioning lines in the top plate and the bottom plate unfolding drawing are complicated and prone to errors in drawing in the construction drawing deepening design of the curved steel box bridge are solved.
The invention solves the technical problem, and adopts the technical scheme that: the method for drawing the positioning line of the diaphragm plate after the top and bottom plates of the curved-surface steel box bridge are unfolded comprises the following steps:
A. drawing a top and bottom plate curved surface development diagram;
B. extracting curve length data between positioning points of every two diaphragm plates, extracting coordinate point (x, y) data of the tops of the polylines of the expansion diagram of the top and bottom plates at the web position, and writing the coordinate point data into a data table;
C. calculating the data table;
c1, calculating the curve length from each diaphragm plate to the starting point of the web plate by accumulating the data of the curve length of the web plate;
c2, using the vertex coordinates of the multi-segment lines of the top and bottom plate expansion diagram to calculate the length from the vertex to the starting point of each multi-segment line, and determining that the positioning point of the diaphragm plate falls between two adjacent vertexes of the multi-segment lines by comparing the two lengths;
c3, calculating the specific coordinates of the positioning points of the diaphragm plates between the adjacent vertexes;
c4, after coordinates of the positioning points of the diaphragm plates are obtained, combining the two points of the diaphragm plates into two-point coordinate data for drawing a straight line;
D. copying a data column of a 'positioning line' in a data calculation table;
E. and opening the top and bottom plate development picture, inputting a line drawing command, pasting the copied data to a command bar, and finishing the drawing of all partition plate positioning lines.
The method has the advantages that the transverse partition plate positioning lines on one top bottom plate can be drawn in batch at one time through the drawing method of the transverse partition plate positioning lines after the top bottom plate of the curved-surface steel box bridge is unfolded, and particularly for large-scale steel structure bridges, under the conditions that the data quantity of the transverse partition plates is large and the number of webs is large, the method has more obvious advantages in the aspect of solving the problems, saves time and improves the drawing accuracy of the positioning lines.
Drawings
FIG. 1 is a view of the partial positioning of a diaphragm after the elevation of a web is unfolded;
FIG. 2 is a top panel expanded view;
FIG. 3 is a top panel unfolded local polyline vertex;
FIG. 4 is a table one of data calculations;
FIG. 5 is a second data calculation table;
fig. 6 is a diagram showing coordinates of a mapping line.
Wherein F1 is the first web, F2 is the second web, F3 is the third web, F4 is the fourth web, P1 is first horizontal dividing plate, P2 is the second horizontal dividing plate, P3 is the third horizontal dividing plate, P4 is the fourth horizontal dividing plate.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the embodiments and the accompanying drawings.
Examples
The embodiment of the present invention is described by taking a top plate partition plate positioning line drawn between a first web plate F1 and a second web plate F2 in fig. 1 as an example, fig. 1 is a partial positioning diagram of a transverse partition plate after a web plate elevation is unfolded, in fig. 1, P1 is a first transverse partition plate, P2 is a second transverse partition plate, P3 is a third transverse partition plate, P4 is a fourth transverse partition plate, fig. 2 is a top plate unfolding diagram, in fig. 2, F1 is a first web plate, F2 is a second web plate, F3 is a third web plate, and F4 is a fourth web plate, and the method for drawing a transverse partition plate positioning line after a curved surface steel box bridge top bottom plate is unfolded in this embodiment includes the following steps:
A. and drawing a top plate curved surface development picture.
B. Since the curve distance between the two positioning points of the diaphragm plate after the top plate is unfolded is equal to the curve distance between the positioning points of the diaphragm plate on the spline curve of the three-dimensional lofting or the web plate unfolding diagram, in this embodiment, first, data of a first web plate F1 unfolding diagram, namely the top plate unfolding diagram, namely fig. 2, is extracted, and the curve distance between points P1-P2-P3- … … is correspondingly equal to the curve distance on the web plate unfolding diagram, and the data is written into a data list of 'curve length between diaphragm plates'. Selecting the polylines of the top plate expansion diagram at the position of the first web plate F1, generating the pinch points of black squares, namely polyline vertexes, and automatically extracting all vertex coordinate (x, y) data in sequence by writing a lisp program, and writing the data into a data calculation table I, namely columns 'F1 expansion line x' and 'F1 expansion line y' in figure 4.
D. The "cumulative 1" column calculates the curve distance from the starting point for each partition anchor point, as in cell B5 ═ A5+ B4. The "two-point distance" column calculates the distance between the polyline vertices at the first web F1 location of the top panel expansion map, as cell E5 SQRT ((C5-C4) ^2+ (D5-D4) ^ 2). The "add 2" column calculates the length from the vertex to the start of each polyline, e.g., cell F5-E5 + F4. And determining that the locating point of the diaphragm plate falls between two adjacent vertexes of the multi-segment line by comparing data of 'accumulation 1' and 'accumulation 2', wherein each cell data of the 'accumulation 2' column is compared with the data of the 'accumulation 1' column one by one, IF the difference value is smaller than the distance between the two adjacent vertexes of the multi-segment line, the locating point falls between the two adjacent vertexes and returns the coordinates of the vertex, and otherwise, blank is returned, for example, the cell G5 has an array calculation formula of { ═ IF (MIN (ABS (F5- $ B $2: $ B $79)) < E5, F5, ") }, H5 and I5 are similar to G5, so that the accumulated length and the coordinates of the vertex on which the locating point falls are screened out. The G, H, I columns of data are copied to a notebook, the data of two adjacent rows are merged into one row and are divided by tab, and the processed data are imported into a second data calculation table, namely K-P columns of FIG. 5. Verifying again in column Q that the anchor point necessarily falls between the vertices, "running 1" also necessarily falls between "running 2 a" AND "running 2 b", AND IF "correct" is returned correctly, otherwise empty is returned, as cell Q5 ═ IF (AND (J5-K5>0, J5-N5<0), "correct", "). And after no error is confirmed, calculating specific drawing coordinates of the positioning point, such as:
r5 ═ ((J5-K5) × (O5-L5)/(N5-K5) + L5) & "," & ((J5-K5) × (P5-M5)/(N5-K5) + M5) & "", note that the last position contains a space.
E. And repeating the steps B-D, obtaining the coordinates of the positioning point of the diaphragm plate at the position of the second web plate F2, combining two points of the diaphragm plate into two-point coordinate data drawing a straight line, and drawing the coordinates of the positioning line as shown in the figure 6, wherein if the cell A5 ═ (the top plate F1! R5) & (the top plate F2! R5) &', is noticed, and the last position comprises a blank space.
E. The data column of the "alignment line" in the data calculation table is copied.
F. And opening the top and bottom plate development picture, inputting a line drawing command, pasting the copied data to a command bar, and finishing drawing of all partition plate positioning lines.
Claims (1)
1. The method for drawing the positioning line of the diaphragm plate after the top and bottom plates of the curved-surface steel box bridge are unfolded is characterized by comprising the following steps of:
A. drawing a top and bottom plate curved surface development diagram;
B. extracting curve length data between positioning points of every two diaphragm plates, extracting coordinate point (x, y) data of the tops of the polylines of the expansion diagram of the top and bottom plates at the web position, and writing the coordinate point data into a data table;
C. calculating the data table;
c1, calculating the curve length from each diaphragm plate to the starting point of the web plate by accumulating the data of the curve length of the web plate;
c2, using the vertex coordinates of the multi-segment lines of the top and bottom plate expansion diagram to calculate the length from the vertex to the starting point of each multi-segment line, and determining that the positioning point of the diaphragm plate falls between two adjacent vertexes of the multi-segment lines by comparing the two lengths;
c3, calculating the specific coordinates of the positioning points of the diaphragm plates between the adjacent vertexes;
c4, after coordinates of the positioning points of the diaphragm plates are obtained, combining two points of the diaphragm plates into two point coordinate data for drawing a straight line;
D. copying a data column of a 'positioning line' in a data calculation table;
E. and opening the top and bottom plate development picture, inputting a line drawing command, pasting the copied data to a command bar, and finishing the drawing of all partition plate positioning lines.
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| CN201910207838.0A CN109829254B (en) | 2019-03-19 | 2019-03-19 | Method for drawing positioning line of diaphragm plate after top and bottom plates of curved steel box bridge are unfolded |
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| CN106204736B (en) * | 2016-03-01 | 2020-08-04 | 临沂市博信机械有限公司 | Unfolding lofting manufacturing method of three-dimensional surface triangle unfolding method |
| CN107201718B (en) * | 2016-03-16 | 2018-10-16 | 中铁十五局集团有限公司 | Preparation method of main longitudinal beam of steel bridge |
| CN107142830B (en) * | 2017-07-14 | 2023-05-23 | 山东交通学院 | Steel pipe web prestress steel-concrete combined girder structure and construction method |
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| CN108536973B (en) * | 2018-04-13 | 2021-08-24 | 中国十九冶集团有限公司 | Construction drawing deepening design method for curved steel box bridge |
| CN109145509B (en) * | 2018-09-25 | 2023-11-24 | 上海钢通网络科技有限公司 | Method for editing section of universal parametric steel plate (folded plate) |
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