Design drawing information extraction method of complex bridge structural analysis and modeling
A bridge structure and design drawing technology, applied in the field of design drawing information extraction, can solve the problems of waste of resources, low efficiency of complex bridge modeling or modeling design, inability to directly extract geometric information of bridge AutoCAD design drawings, etc., and achieve the goal of improving efficiency Effect
Inactive Publication Date: 2012-10-17
WUHAN UNIV OF TECH +2
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Problems solved by technology
[0011] The modeling functions of these systems are relatively powerful, but none of them can directly extract the geometric information of the bridge AutoCAD design drawing (two-dimensional three-view)
Because most of the current bridge construction design drawings are two-dimensional AutoCAD three-view, causing a lot of waste of resources, and making the modeling or modeling design efficiency of complex bridges (such as complex line curve bridges) lower
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[0035] Such as Figure 5 As shown, the specific steps are as follows:
[0036] 1. Drawing preparation
[0037] Prepare the graphics within the scope of the bridge, such as the horizontal curve of the bridge deck, the vertical curve of the bridge deck, the section diagram, and the prestressed cable drawing, and pay attention to the alignment of the two ends of the horizontal curve of the bridge deck, the vertical curve of the bridge deck, and the prestressed cable diagram.
[0038] 2. Drawing arrangement
[0039] Modify the graphics according to the ratio of 1:1, and use the PEDIT command to merge the graphics in each drawing and convert them into polylines. For example, the horizontal and vertical curves of the bridge deck are converted into a polyline. If there is a prestressed cable diagram, attention should be paid to the treatment of overlapping areas, and each cable should be converted into a polyline, and the section diagram should be processed into multiple closed pol...
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The invention relates to a design drawing information extraction method of complex bridge structural analysis and modeling, which comprises the following steps: separating a bridge surface horizontal curve, a bridge surface vertical curve, a prestressed cable drawing, a section drawing and the like in a design drawing from an AutoCAD original drawing, and carrying out proportion adjustment until the proportion is 1:1; using PEDIT (Polyline Edition) order combination, i.e. converting separated scatted line segments from the drawing into a polyline; determining segment points, i.e. determining the segment points on the bridge surface curve according to the segment length of beam units, and drawing segment lines; utilizing the bridge surface horizontal curve which is subject to the segment processing to draw segment lines of prestressed cables and the bridge surface vertical curve; extracting bridge surface horizontal curve information, bridge surface vertical curve information, prestressed cable information and the like to obtain a three-dimensional construction drawing; and if necessary, automatically storing the information into a data file or a database for the bridge modeling orshape design. The method has the advantages that all operations and extractions are completed by utilizing the existing AutoCAD design, so that the space information of a bridge can be obtained for the complex bridge structural analysis or the quick shape modification or the design optimization, so that the efficiency of bridge modeling or shape design can be improved.
Description
technical field [0001] The invention relates to a method for extracting design drawing information, in particular to a method for extracting design drawing information for analysis and modeling of complex bridge structures. Background technique [0002] A lot of commercial software about bridge CAD has been developed at home and abroad. Such as: [0003] (1) American ANSYS system [0004] ANSYS Civil FEM, a special civil engineering package of ANSYS, can be used to study the force, deformation, stability and seismic response of bridges. [0005] ANSYS Civil FEM provides a powerful bridge solid modeling tool, which can conveniently construct bridge finite element models. Direct modeling is combined with solid modeling, and top-down and bottom-up modeling are combined. Convenient dragging, rotating, copying, chamfering, etc. Auxiliary tools such as selection and components and work planes also provide great convenience for bridge modeling. [0006] (2) US SAP2000 system ...
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IPC IPC(8): G06F17/50
Inventor 何雄君宋继宏詹建辉傅克俭刘江汪国相干学军王小敏
Owner WUHAN UNIV OF TECH