CN114357576A - Revit and Dynamo variable-section bridge railing column-based creating method - Google Patents
Revit and Dynamo variable-section bridge railing column-based creating method Download PDFInfo
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Abstract
The invention discloses a method for creating a guardrail column of a bridge based on Revit and Dynamo variable cross section, which relates to a method for creating a model based on Revit and Dynamo secondary development. Compared with the existing building mode of the bridge guardrail column, the building model has the following beneficial effects: 1. the efficiency is higher: the invention is based on dynamo parameterized plug-in, and can quickly arrange a large number of guardrail upright posts with different elevations and different directions in a short time. 2. The change is convenient: the numerical values of any starting point position, any end point position and any distance on the three-dimensional space curve can be input according to the design drawing. 3. The data is accurate: and the three-dimensional space curve can be accurately segmented according to specified numerical values. 4. The procedure is simplified, and the popularization is facilitated.
Description
Technical Field
The invention relates to a model creation method based on secondary development of Revit and Dynamo, in particular to a bridge railing model creation method based on Revit and Dynamo.
Background
At present, the BIM technology in China is developed rapidly, and modeling software is numerous, wherein Revit is the most common modeling software. A visualization program is written based on a secondary development platform Dynamo of Revit, a BIM model with a more complex shape is built in the Revit, and simultaneously, the Dynamo can enable lines and planes to interact through a programming idea, so that insertion base points of a family in the Revit are generated, and member families are placed in batches.
In the process of creating the information-based model of the conventional building of the bridge guardrail stand column in the municipal engineering project, the structural form of the bridge guardrail stand column is the same, the number of the bridge guardrail stand column is large, a large bridge has few thousands of guardrail stand columns, and more tens of thousands of guardrail stand columns. At present, the conventional building informatization model building method of the bridge guardrail upright posts needs to manually adjust the spatial position of each guardrail upright post, the workload of building the guardrail upright posts is huge, and the time is long. When a variable-section bridge is encountered, the guardrail column needs to manually adjust the direction of the bridge column along the tangential direction of the edge of the bridge, the traditional manual modeling is only used, the accurate spatial position and direction of the guardrail column are difficult to position, the position calculation process is very complex, the time is long, and the efficiency is low. In the bridge construction drawing, only one section of standard section is often indicated for the bridge guardrail stand columns, the full-bridge guardrail stand columns are not arranged, and the problem possibly encountered in the subsequent construction process is difficult to predict. The conventional bridge guardrail upright post building informatization model creation method has various inconveniences and difficulties, so that innovation needs to be carried out on the bridge guardrail upright post building informatization model creation method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for creating the variable-section bridge guardrail upright post based on Revit and Dynamo, which simplifies the method for creating the conventional building information model with the need of independent manual adjustment of the variable-section bridge guardrail upright post and can obviously improve the modeling efficiency of the building information model of the variable-section bridge guardrail upright post.
In order to solve the technical problem, the invention is solved by the following technical scheme: a method for creating a variable-section bridge railing column based on Revit and Dynamo comprises the following steps: step A: according to the existing design, in a massif environment, importing bridge center line data to generate a bridge design center line model through a Dynamo program; and B: generating variable cross-section outlines of the bridge box girder through parameterizing the variable cross-section bridge box girder outline; and C: leading in the offset bridge center line distance of the center line of the bridge box girder and the designed bridge floor downward movement distance to generate a bridge box girder center line model through a Dynamo program; step D: generating a placing point on a box girder central line according to the distance between each variable cross-section contour of the bridge box girder and the starting point by a Dynamo program; step E: placing each variable cross-section contour of the bridge box girder on each placing point generated in the step 4 through a Dynamo program; step F: creating a shape command in the revit volume family, and generating the solid shape of the bridge variable-section beam body from each contour in the step E; step G: in a revit massif environment, setting a series of reference points on the upper picking vertex of the flange of the bridge variable cross-section beam body by using a creation point primitive command, and setting the reference points at the variable cross-section position in an encrypted manner; step H: selecting all reference points on one side of the flange of the bridge box girder in the step G through a sample line command of the points by using revit software to generate a sample line curve 1 passing through the top point of the flange of the bridge box girder; step I: importing the spline curve in the step H into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge; step J: repeating the step G to the step H to generate a spline curve passing through the top point of the flange on the other side of the bridge; step K: importing the spline curve in the step J into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge; step M: the method comprises the steps of generating a design construction drawing through a bridge flange top spline curve through dynamo nodes of Current.Point AtSegmentLength, stipulating the guardrail column starting point to be 0.2m, segmenting the spline curve through the nodes of Current.Point sAtChrdLengthFromPoint according to the specified interval of the design construction drawing, generating a series of guardrail column family placing space points, and forming a series of guardrail column family placing space points through the nodes of Current.Point
Setransition generates a tangential direction of a bridge extending flange line of each spatial point; and step N: and (4) introducing the guardrail column group, placing the guardrail column group on each space point position generated in the step M through a dynamo program, completing the placement along the tangential direction of the flange line of the bridge, and repeating the step M to generate the guardrail column group on the other side of the bridge.
Preferably, in the above technical solution, the data of the center line of the bridge introduced in step a includes coordinate values, design elevations and azimuth angles of the pile numbers.
According to the technical scheme, preferably, the parameters introduced in the step B are the distance between two sides of the outline of the box girder and the center line of the box girder.
In the above technical solution, preferably, the data imported in step C further includes bridge box girder positioning data.
Preferably, in the step F, the data file is obtained by using file.path and file.frompoath nodes, the coordinate values are converted into points by using point.bycoordinates nodes, and then the per-pile coordinate points are fitted by using nurbscurre.bypoints nodes to generate the entity shape.
In the above-described aspect, preferably, in step H and step J, a point is generated at the corresponding reference point using a current. positive displacement direction node, then a straight line is generated along the reference point by a line.
The key point of the invention is that Revit and Dynamo are used for creating a spatial position of the bottom center of the guardrail upright post, and the guardrail upright post is placed according to the tangential azimuth of the bridge flange line and the initial position and the interval specified by the design drawing. Compared with the existing building mode of the bridge guardrail column, the building model has the following beneficial effects: 1. the efficiency is higher: the invention is based on dynamo parameterized plug-in, and can quickly arrange a large number of guardrail upright posts with different elevations and different directions in a short time. 2. The change is convenient: the numerical values of any starting point position, any end point position and any distance on the three-dimensional space curve can be input according to the design drawing. 3. The data is accurate: and the three-dimensional space curve can be accurately segmented according to specified numerical values. 4. The procedure is simplified, and the popularization is facilitated: the dynamo program is matched with an excel database for use, the excel database is not required to be established in the method, the dynamo program can be simplified, and the learning time of non-programming experiential personnel is reduced.
Drawings
FIG. 1 is a schematic view of the flow structure of the present invention.
FIG. 2 is a variable cross-section beam of the present invention.
Fig. 3 shows a spline curve 1 passing through the apex of one side of the flange of the bridge according to the present invention.
Fig. 4 shows the spline curve 2 of the present invention passing through the apex of the other side of the bridge flange.
Figure 5 is a single bridge railing post model of the present invention.
Fig. 6 is a side rail column family completed by the dynamo program placement of the present invention.
Figure 7 is another family of guardrail posts completed by placement by the dynamo program of the present invention.
FIG. 8 is the integral model of the bridge guardrail column generated by the method.
Fig. 9 is a box girder profile of a parametric variable section bridge of the present invention.
Detailed Description
Example 1: as shown in fig. 1 to 8, a method for creating a variable cross-section bridge railing post based on Revit and Dynamo, comprises the following steps: step A: according to the existing design, in a massif environment, importing bridge center line data to generate a bridge design center line model through a Dynamo program; the data of the center line of the bridge imported in the step comprises coordinate values, design elevations and azimuth angles of all pile numbers.
Table 1: importing data sample in step A
And B: generating variable cross-section outlines of the bridge box girder through parameterizing the variable cross-section bridge box girder outline; the parameters introduced in this step are the distance between the two sides of the box girder outline and the center line of the box girder.
Table 2: importing data sample in step B
And C: leading in the offset bridge center line distance of the center line of the bridge box girder and the designed bridge floor downward movement distance to generate a bridge box girder center line model through a Dynamo program; the imported data in this step also includes bridge box beam positioning data.
Table 3: importing data sample in step C
Step D: generating a placing point on a box girder central line according to the distance between each variable cross-section contour of the bridge box girder and the starting point by a Dynamo program; step E: placing each variable cross-section contour of the bridge box girder on each placing point generated in the step 4 through a Dynamo program; step F: creating a shape command in the revit volume family, and generating the solid shape of the bridge variable-section beam body from each contour in the step E; in step F, file.
Step G: in a revit massif environment, a creation point primitive command is used for setting a series of reference points at the upper picking top point of the flange of the bridge variable cross-section beam body, and the reference points are required to be encrypted and set at the variable cross-section.
Step H: selecting all reference points on one side of the flange of the bridge box girder in the step G through a sample line command of the points by using revit software to generate a sample line curve 1 passing through the top point of the flange of the bridge box girder; generating points at corresponding reference points using a current. positive segmentation length node in step H and step J, then generating straight lines along the reference points through a line. bystartpoint direction length node, and bending and smoothly transitioning the extended straight lines according to the lateral pitch of the piles using the current. offset node.
Step I: importing the spline curve in the step H into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge; step J: repeating the step G to the step H to generate a spline curve passing through the top point of the flange on the other side of the bridge; step K: and D, importing the spline curve in the step J into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge.
Step M: generating a design construction drawing by a bridge flange vertex spline curve through a dynamo node of Current.PointAtSegmentLength to stipulate that the starting point of a guardrail upright post is 0.2m, segmenting the spline curve according to the stipulated interval of the design construction drawing by a node of Current.PointsAttChrodLengthFromPoint to generate a series of guardrail upright post family placing space points, and generating the tangential direction of a bridge extending flange line of each space point through a node of FamilyInstance.SetRetion;
and step N: and (4) introducing the guardrail column group, placing the guardrail column group on each space point position generated in the step M through a dynamo program, completing the placement along the tangential direction of the flange line of the bridge, and repeating the step M to generate the guardrail column group on the other side of the bridge.
Claims (6)
1. A method for creating a variable-section bridge railing post based on Revit and Dynamo is characterized by comprising the following steps:
step A: according to the existing design, in a massif environment, importing bridge center line data to generate a bridge design center line model through a Dynamo program;
and B: generating variable cross-section outlines of the bridge box girder through parameterizing the variable cross-section bridge box girder outline;
and C: leading in the offset bridge center line distance of the center line of the bridge box girder and the designed bridge floor downward movement distance to generate a bridge box girder center line model through a Dynamo program;
step D: generating a placing point on a box girder central line according to the distance between each variable cross-section contour of the bridge box girder and the starting point by a Dynamo program;
step E: placing each variable cross-section contour of the bridge box girder on each placing point generated in the step 4 through a Dynamo program;
step F: creating a shape command in the revit volume family, and generating the solid shape of the bridge variable-section beam body from each contour in the step E;
step G: in a revit massif environment, setting a series of reference points on the upper picking vertex of the flange of the bridge variable cross-section beam body by using a creation point primitive command, and setting the reference points at the variable cross-section position in an encrypted manner;
step H: selecting all reference points on one side of the flange of the bridge box girder in the step G through a sample line command of the points by using revit software to generate a sample line curve 1 passing through the top point of the flange of the bridge box girder;
step I: importing the spline curve in the step H into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge;
step J: repeating the step G to the step H to generate a spline curve passing through the top point of the flange on the other side of the bridge;
step K: importing the spline curve in the step J into a bridge project file, and aligning the coordinates of the base point of the spline curve with the coordinates of the base point of the bridge;
step M: generating a design construction drawing by a bridge flange vertex spline curve through a dynamo node of Current.PointAtSegmentLength to stipulate that the starting point of a guardrail upright post is 0.2m, segmenting the spline curve according to the stipulated interval of the design construction drawing by a node of Current.PointsAttChrodLengthFromPoint to generate a series of guardrail upright post family placing space points, and generating the tangential direction of a bridge extending flange line of each space point through a node of FamilyInstance.SetRetion;
and step N: and (4) introducing the guardrail column group, placing the guardrail column group on each space point position generated in the step M through a dynamo program, completing the placement along the tangential direction of the flange line of the bridge, and repeating the step M to generate the guardrail column group on the other side of the bridge.
2. The method for creating the Revit and Dynamo variable section-based bridge railing post according to claim 1, wherein the data of the center line of the bridge imported in the step A comprises coordinate values, design elevations and azimuth angles of pile numbers.
3. The method for creating a Revit and Dynamo variable cross-section-based bridge railing post as claimed in claim 1, wherein the parameter introduced in step B is the distance between the two sides of the box girder profile and the center line of the box girder.
4. The method for creating a Revit and Dynamo variable cross-section-based bridge railing post as claimed in claim 1, wherein the importing data in step C further comprises bridge box girder positioning data.
5. The method for creating a bridge railing post based on Revit and Dynamo variable cross-section according to claim 1, wherein in step F, file.
6. The method for creating a bridge railing post based on Revit and Dynamo variable cross-section as claimed in claim 1, wherein in step H and step J, using the cut. positive displacement piecewise length node to generate points at corresponding reference points, then generating straight lines along the reference points by the line. ByStartPoint directive Length node, bending and smoothly transitioning the extended straight lines according to the transverse spacing of the posts by the cut. offset node.
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| US20210056242A1 (en) * | 2019-08-21 | 2021-02-25 | Bricsys Nv | Computer-implemented generation of an analytical model of a structure |
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| CN113297649A (en) * | 2021-05-26 | 2021-08-24 | 中建八局第一建设有限公司 | Revit-based rapid construction method for assembly-type municipal bridge construction model |
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Patent Citations (5)
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| US20210056242A1 (en) * | 2019-08-21 | 2021-02-25 | Bricsys Nv | Computer-implemented generation of an analytical model of a structure |
| CN112651061A (en) * | 2019-10-12 | 2021-04-13 | 南京林业大学 | Method for establishing BIM (building information modeling) model of multi-span bridge superstructure by using Dynamo |
| CN111724476A (en) * | 2020-06-29 | 2020-09-29 | 宁波市政工程建设集团股份有限公司 | Dynamo and Python-based rapid modeling method for special-shaped bridge pier |
| CN112948920A (en) * | 2021-02-03 | 2021-06-11 | 浙江交工集团股份有限公司 | Method and system for quickly modeling roadbed and pavement BIM model based on Revit platform |
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