CN112632675A - Building structure reverse axis modeling method - Google Patents
Building structure reverse axis modeling method Download PDFInfo
- Publication number
- CN112632675A CN112632675A CN202011526404.6A CN202011526404A CN112632675A CN 112632675 A CN112632675 A CN 112632675A CN 202011526404 A CN202011526404 A CN 202011526404A CN 112632675 A CN112632675 A CN 112632675A
- Authority
- CN
- China
- Prior art keywords
- building structure
- point
- vector
- vertexes
- projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000013598 vector Substances 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 208000003464 asthenopia Diseases 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Numerical Control (AREA)
Abstract
The invention relates to a building structure reverse axis modeling method, which comprises the following steps: step 1: segmenting the building structure; step 2: aiming at the first section, converting the steel structure into an entity grid structure, and acquiring a vertex of the entity grid structure; and step 3: calculating centroid points of all the vertexes; and 4, step 4: establishing a normal vector according to the centroid point and any one vertex, and establishing a point normal plane; and 5: projecting the vertexes to a point normal plane, and establishing projection vectors from the projection points to all the vertexes; step 6: based on whether the directions of the projection vector and the normal vector are the same, dividing the vertexes into two groups; and step 7: respectively calculating the middle points of all vertexes in the two groups, and respectively marking as two end points of a line segment; and 8: connecting the two end points to obtain an axis of the first section of the building structure; and step 9: and circularly traversing each section of the building structure to obtain the axis of the building structure. The invention can quickly generate the axis of the building structure and improve the efficiency and the precision of axis modeling.
Description
Technical Field
The invention relates to the field of structural member modeling in the building industry, in particular to a building structure reverse axis modeling method.
Background
Along with the rise of the Chinese travel projects, the building structure is more and more colorful. For the built building, in order to check and analyze the structural engineering of the building, a line model of a component is generally required to be reestablished, so that finite element analysis is carried out, and the line model is used as a positioning reference for drawing a construction drawing of the component; the size benchmark of component processing and the benchmark of component construction installation site location and verification, therefore, whether the axis modeling is accurate or not is related to the safety and accuracy of subsequent construction, and the method has important significance. The traditional axis modeling method is manual modeling, namely an auxiliary line is manually established and an axis coordinate is solved by using a capturing function of software under the action of eye force, when the size of a model is large, the efficiency is very low, and human eyes are fatigued, so that human errors can exist due to manual capturing.
Therefore, how to provide a building structure reverse axis modeling method with high efficiency and high precision is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention provides a building structure reverse axis modeling method to solve the technical problem.
In order to solve the technical problem, the invention provides a building structure reverse axis modeling method, which comprises the following steps:
step 1: segmenting the building structure;
step 2: aiming at a first section, converting a steel structure in the building structure into a solid grid structure, and acquiring a vertex of the solid grid structure;
and step 3: calculating centroid points of all the vertexes;
and 4, step 4: establishing a normal vector according to the centroid point and any one vertex, and establishing a point normal plane;
and 5: projecting the vertexes to the point normal plane, and establishing projection vectors from projection points to all vertexes;
step 6: based on whether the projection vector and the normal vector are the same in direction, dividing the vertexes into two groups;
and 7: respectively calculating the middle points of all vertexes in the two groups, and respectively marking as two end points of a line segment;
and 8: connecting the two end points to obtain an axis of the first section of the building structure;
and step 9: and circularly traversing each section of the building structure to obtain the axis of the building structure.
Preferably, in step 4, the method for establishing the normal vector and the point normal plane includes: drawing a vector by taking the centroid point as a starting point and any selected vertex as an end point, and recording the vector as a normal vector; and a plane where the centroid point is located and is perpendicular to the normal vector is marked as a point normal plane.
Preferably, in step 5, the method for establishing the projection vector includes: and taking the projection point as a starting point and a vertex corresponding to the projection point as an end point, and recording the drawn vector as a projection vector.
Preferably, in step 6, the grouping method is as follows: the vertices are stored in two containers in the form of three-dimensional coordinates.
Compared with the prior art, the building structure reverse axis modeling method provided by the invention has the following advantages:
1. the method can be realized by a programming means, and the axis of the steel member can be quickly generated by circulating each section of steel member grid of the building structure, so that the working efficiency is greatly improved;
2. the modeling of the axis in the invention is not dependent on human eyes, thereby greatly reducing errors caused by working fatigue and visual fatigue, improving the modeling precision and having more obvious effect on large projects.
Drawings
FIG. 1 is a flow chart of a method for modeling a reverse axis of a building structure according to an embodiment of the present invention;
fig. 2a to fig. 2g are schematic structural comparison diagrams of steps in a building structure reverse axis modeling method according to an embodiment of the present invention.
In the figure: 10-single steel structural member, 20-vertex, 30-centroid point, 40-normal vector, 50-point normal plane, 60-projection point, 70-projection vector, 80-endpoint and 90-axis.
Detailed Description
In order to more thoroughly express the technical scheme of the invention, the following specific examples are listed to demonstrate the technical effect; it is emphasized that these examples are intended to illustrate the invention and are not to be construed as limiting the scope of the invention.
The building structure reverse axis modeling method provided by the invention, as shown in fig. 1 to fig. 2g, comprises the following steps:
step 1: segmenting the building structure, wherein a specific segmentation mode can be divided according to a specific shape of the building structure, for example, a complete steel structural member is taken as a segment, please refer to fig. 2a, which illustrates the whole modeling process by taking a single steel structural member 10 as an example;
step 2: referring to fig. 2b, the steel structures in the building structure are converted into a solid mesh structure, and the vertices 20 of the solid mesh structure are obtained, at this time, the data (e.g., coordinates) of all the vertices 20 are mixed together and are not classified;
and step 3: referring to fig. 2c, the centroid point 30 of all the vertices 20 is calculated, and the centroid point 30 is the geometric center of the cross-sectional graph formed by all the vertices 20;
and 4, step 4: referring to fig. 2d, a normal vector 40 is established according to the centroid point 30 and any one of the vertices 20, and a normal plane 50 is established, specifically, the method for establishing the normal vector 40 and the normal plane 50 is as follows: drawing a vector by taking the centroid point 30 as a starting point and any one selected vertex 20 as an end point, and marking as a normal vector 40; a plane where the centroid point 30 is located and perpendicular to the normal vector 40 is marked as a point normal plane 50;
and 5: referring to fig. 2e, the vertex 20 is projected to the normal plane 50, and a projection vector 70 from the projection point 60 to each vertex 20 is established, specifically, the method for establishing the projection vector 70 is as follows: taking the projection point 60 as a starting point, and taking the vertex 20 corresponding to the projection point 60 as an end point according to the one-to-one association relationship between the vertex 20 and the projection point 60, and marking the drawn vector as a projection vector 70;
step 6: with reference to fig. 2e, based on whether the projection vector 70 and the normal vector 40 are in the same direction, the vertices 20 are divided into two groups, that is, the vertices 20 corresponding to the projection vector 70 in the same direction as the normal vector 40 are divided into one group, and the vertices 20 corresponding to the projection vector 70 in the opposite direction to the normal vector 40 are divided into another group, so as to complete the classification of the vertices 20, specifically, the grouping manner is: storing the vertices 20 in two containers in the form of three-dimensional coordinates for storage and subsequent extraction;
and 7: referring to fig. 2f, the middle points of the vertexes 20 in the two groups are calculated respectively, and the two end points 80 marked as a line segment are calculated respectively, that is, the coordinates of all vertexes 20 in one container are extracted, the coordinates of the middle points of the vertexes 20 are calculated and marked as one end point 80, the coordinates of all vertexes 20 in the other container are extracted, and the other end point 80 is calculated;
and 8: referring to fig. 2g, connecting the two end points 80, an axis 90 of the first building structure is obtained;
and step 9: and circularly traversing each section of the building structure to obtain the axis of the building structure.
The modeling method can improve the modeling efficiency and the modeling precision in the building structure reverse axis modeling check by times; meanwhile, human errors caused by working fatigue and visual fatigue can be reduced, and the effect of the method is more obvious for large projects.
In summary, the building structure reverse axis modeling method provided by the invention comprises the following steps: step 1: segmenting the building structure; step 2: for the first segment, converting the steel structure in the building structure into a solid mesh structure, and acquiring a vertex 20 of the solid mesh structure; and step 3: calculating centroid points 30 for all vertices 20; and 4, step 4: establishing a normal vector 40 according to the centroid point 30 and any one of the vertices 20, and establishing a point normal plane 50; and 5: projecting the vertexes 20 to the point normal plane 50, and establishing projection vectors 70 from projection points 60 to the vertexes 20; step 6: based on whether the projection vector 70 and the normal vector 40 are the same direction, the vertices 20 are divided into two groups; and 7: calculating the middle points of the vertexes 20 in the two groups respectively, and marking the middle points as two end points 80 of a line segment respectively; and 8: connecting the two end points 80, obtaining an axis 90 of the first building structure section; and step 9: and circularly traversing each section of the building structure to obtain the axis of the building structure. The invention can quickly generate the axis of the building structure and improve the efficiency and the precision of axis modeling.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A building structure reverse axis modeling method is characterized by comprising the following steps:
step 1: segmenting the building structure;
step 2: aiming at a first section, converting a steel structure in the building structure into a solid grid structure, and acquiring a vertex of the solid grid structure;
and step 3: calculating centroid points of all the vertexes;
and 4, step 4: establishing a normal vector according to the centroid point and any one vertex, and establishing a point normal plane;
and 5: projecting the vertexes to the point normal plane, and establishing projection vectors from projection points to all vertexes;
step 6: based on whether the projection vector and the normal vector are the same in direction, dividing the vertexes into two groups;
and 7: respectively calculating the middle points of all vertexes in the two groups, and respectively marking as two end points of a line segment;
and 8: connecting the two end points to obtain an axis of the first section of the building structure;
and step 9: and circularly traversing each section of the building structure to obtain the axis of the building structure.
2. The method for modeling the reverse axis of a building structure according to claim 1, wherein in step 4, the method for establishing the normal vector and the point-normal plane comprises: drawing a vector by taking the centroid point as a starting point and any selected vertex as an end point, and recording the vector as a normal vector; and a plane where the centroid point is located and is perpendicular to the normal vector is marked as a point normal plane.
3. The method for modeling the reverse axis of a building structure according to claim 1, wherein in step 5, the projection vector is established by: and taking the projection point as a starting point and a vertex corresponding to the projection point as an end point, and recording the drawn vector as a projection vector.
4. The building structure reverse axis modeling method of claim 1, wherein in step 6, the grouping is: the vertices are stored in two containers in the form of three-dimensional coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011526404.6A CN112632675B (en) | 2020-12-22 | 2020-12-22 | Building structure reverse axis modeling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011526404.6A CN112632675B (en) | 2020-12-22 | 2020-12-22 | Building structure reverse axis modeling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112632675A true CN112632675A (en) | 2021-04-09 |
| CN112632675B CN112632675B (en) | 2024-08-23 |
Family
ID=75320949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011526404.6A Active CN112632675B (en) | 2020-12-22 | 2020-12-22 | Building structure reverse axis modeling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112632675B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162584A (en) * | 2022-08-19 | 2022-10-11 | 中建八局发展建设有限公司 | 720-degree spherical-screen cinema multi-layer spherical curtain wall construction method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324310A (en) * | 2000-03-06 | 2001-11-22 | Kazuhiro Shiina | Method, device and system for preparing three- dimensional data |
| KR100753537B1 (en) * | 2006-06-09 | 2007-08-30 | 주식회사 아이너스기술 | Method for reverse modeling using mesh data with feature |
| US7830373B1 (en) * | 2006-01-25 | 2010-11-09 | Bo Gao | System and methods of civil engineering objects model |
| US20120265494A1 (en) * | 2011-04-14 | 2012-10-18 | National Central University | Method of Online Building-Model Reconstruction Using Photogrammetric Mapping System |
| KR20130055185A (en) * | 2011-11-18 | 2013-05-28 | 서울대학교산학협력단 | Method of modeling roof element of han-ok by parametric operation |
| CN104199999A (en) * | 2014-07-17 | 2014-12-10 | 中国人民解放军国防科学技术大学 | Quantitative analysis method of influence of joint centralization error on locating precision of multi-freedom-degree mechanical arm tail end |
| CN107862738A (en) * | 2017-11-28 | 2018-03-30 | 武汉大学 | One kind carries out doors structure three-dimensional rebuilding method based on mobile laser measurement point cloud |
| CN109543216A (en) * | 2018-10-16 | 2019-03-29 | 华南理工大学 | A kind of segment girder precast linear control method based on slug matching |
| EP3502370A1 (en) * | 2017-12-22 | 2019-06-26 | Dassault Systèmes | Method for designing a tying bar enclosing a plurality of concrete-reinforcing bars |
| CN110826129A (en) * | 2019-10-31 | 2020-02-21 | 上海宝冶集团有限公司 | Application method of parametric modeling in installation of special-shaped structural member |
| CN111095354A (en) * | 2017-09-13 | 2020-05-01 | 西门子医疗有限公司 | Improved 3-D vessel tree surface reconstruction |
-
2020
- 2020-12-22 CN CN202011526404.6A patent/CN112632675B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001324310A (en) * | 2000-03-06 | 2001-11-22 | Kazuhiro Shiina | Method, device and system for preparing three- dimensional data |
| US7830373B1 (en) * | 2006-01-25 | 2010-11-09 | Bo Gao | System and methods of civil engineering objects model |
| KR100753537B1 (en) * | 2006-06-09 | 2007-08-30 | 주식회사 아이너스기술 | Method for reverse modeling using mesh data with feature |
| US20120265494A1 (en) * | 2011-04-14 | 2012-10-18 | National Central University | Method of Online Building-Model Reconstruction Using Photogrammetric Mapping System |
| KR20130055185A (en) * | 2011-11-18 | 2013-05-28 | 서울대학교산학협력단 | Method of modeling roof element of han-ok by parametric operation |
| CN104199999A (en) * | 2014-07-17 | 2014-12-10 | 中国人民解放军国防科学技术大学 | Quantitative analysis method of influence of joint centralization error on locating precision of multi-freedom-degree mechanical arm tail end |
| CN111095354A (en) * | 2017-09-13 | 2020-05-01 | 西门子医疗有限公司 | Improved 3-D vessel tree surface reconstruction |
| CN107862738A (en) * | 2017-11-28 | 2018-03-30 | 武汉大学 | One kind carries out doors structure three-dimensional rebuilding method based on mobile laser measurement point cloud |
| EP3502370A1 (en) * | 2017-12-22 | 2019-06-26 | Dassault Systèmes | Method for designing a tying bar enclosing a plurality of concrete-reinforcing bars |
| CN109543216A (en) * | 2018-10-16 | 2019-03-29 | 华南理工大学 | A kind of segment girder precast linear control method based on slug matching |
| CN110826129A (en) * | 2019-10-31 | 2020-02-21 | 上海宝冶集团有限公司 | Application method of parametric modeling in installation of special-shaped structural member |
Non-Patent Citations (5)
| Title |
|---|
| 丁祖娇;李泷杲;翟建军;李栋;: "一种面向对缝测量的双线结构光光条中心提取方法", 航空制造技术, no. 08, 15 April 2017 (2017-04-15) * |
| 娄静谊;赵俊三;: "基于激光扫描数据正交投影分析的建筑物提取研究", 价值工程, no. 14, 18 May 2017 (2017-05-18) * |
| 李兵;杨勇;吴英勇;: "基于点云数据的隧道中轴线自动提取方法研究", 重庆建筑, no. 01, 25 January 2016 (2016-01-25) * |
| 缪永伟;冯小红;于莉洁;陈佳舟;李永水;: "基于单幅图像的三维建筑物交互累进式建模", 计算机辅助设计与图形学学报, no. 09, 15 September 2016 (2016-09-15) * |
| 荆海峰;李广云;王力;杨文锋;: "基于圆柱多段拟合的隧道中轴线提取方法研究", 大地测量与地球动力学, no. 02, 15 February 2018 (2018-02-15) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162584A (en) * | 2022-08-19 | 2022-10-11 | 中建八局发展建设有限公司 | 720-degree spherical-screen cinema multi-layer spherical curtain wall construction method |
| CN115162584B (en) * | 2022-08-19 | 2023-06-02 | 中建八局发展建设有限公司 | Multilayer spherical curtain wall construction method for 720-degree spherical curtain cinema |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112632675B (en) | 2024-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101986037B1 (en) | A method for detecting a collision between a cylindrical collider and a convex body in a real-time virtual scene, | |
| CN113593030B (en) | Geological profile generation method, system, terminal and medium based on three-dimensional model | |
| CN101894176A (en) | Rebuild the method for the distance field of sweep volume at sampled point | |
| CN107622530B (en) | Efficient and robust triangulation network cutting method | |
| CN110111425B (en) | 3D font oblique angle generation method, medium, device and apparatus | |
| CN108763827B (en) | Transmission tower finite element model establishing method and device | |
| CN114241018B (en) | Tooth point cloud registration method, system and readable storage medium | |
| CN112052489B (en) | Method and system for generating house type graph | |
| US7295201B2 (en) | Method and system for generating automated exploded views | |
| CN107203962B (en) | Method for making pseudo-3D image by using 2D picture and electronic equipment | |
| US8587586B2 (en) | Electronic device and method for meshing curved surface | |
| CN111091594B (en) | Multi-point cloud plane fusion method and device | |
| CN114861500B (en) | Method and system for automatically generating finite element model of tunnel structure based on three-dimensional point cloud | |
| CN112632675A (en) | Building structure reverse axis modeling method | |
| CN105243137A (en) | Draft-based three-dimensional model retrieval viewpoint selection method | |
| CN105184854A (en) | Quick modeling method for cloud achievement data of underground space scanning point | |
| US7388584B2 (en) | Method and program for determining insides and outsides of boundaries | |
| CN110910463B (en) | Full-view-point cloud data fixed-length ordered encoding method and equipment and storage medium | |
| CN110929322A (en) | Method and system for establishing mapping between BIM model and three-dimensional cloud model | |
| Toony et al. | Pgp2x: Principal geometric primitives parameters extraction | |
| JP6025615B2 (en) | Image drawing device | |
| CN114089692A (en) | Rapid numerical control programming method suitable for complex and long surface of part | |
| Ye et al. | An improved algorithm for triangle to triangle intersection test | |
| CN111325854A (en) | Shape model correction device, shape model correction method, and storage medium | |
| CN111862322B (en) | Arch axis extraction method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |