CN113656863A

CN113656863A - BIM (building information modeling) lintel generation method based on inventory item

Info

Publication number: CN113656863A
Application number: CN202110831555.0A
Authority: CN
Inventors: 张金牛; 徐昇伟; 陆宸君
Original assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Current assignee: Shanghai Urban Construction Design Research Institute Group Co Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-11-16
Anticipated expiration: 2041-07-22
Also published as: CN113656863B

Abstract

The invention discloses a BIM (building information modeling) lintel generating method based on a list clearing project; the method comprises the following steps: step 1: picking up all doors and windows under the secondary structure; step 2, identifying walls under all secondary structures according to the list item classification; step 3, repeating generation judgment, and checking whether a lintel is generated at a target position before a new lintel is generated; if not, continuing the next step; if the lintel has been generated; step 4, acquiring the width of the door and the window under the secondary structure, and defining a data source for acquiring the width of the door and the window; step 5, acquiring the top height of the door and window under the secondary structure, and defining a data source for acquiring the top height of the door and window; step 6, setting a support, and defining a support rule generated by the lintel; step 7, setting exceeding, namely setting a processing scheme when the lintel exceeds the wall range; and 8, creating the lintel according to the size and the position information of the lintel. The application of the method can solve the problems of the lintel generation accuracy and feasibility in the BIM model.

Description

BIM (building information modeling) lintel generation method based on inventory item

Technical Field

The invention relates to the technical field of computer aided design, in particular to a BIM (building information modeling) lintel generation method based on a list clearing project.

Background

Under the policy requirements of construction project refinement management and informatization management, under the BIM model acceptance system, besides submitting traditional project data and drawings, BIM models and data are synchronously submitted, usually taking rvt format files of Revit software as a main part. The BIM technology is used for design and simulated construction, so that the quality and cost of project construction schemes can be effectively controlled, and the design and construction problems can be found in advance to reduce reworking. With the gradual maturity of the application of the BIM technology, the modeling depth is also continuously improved, the coverage rate of the general structure, building and installation engineering can approach to more than 90%, but some parts are difficult to completely reach the stage of the deepening design, such as lintels, constructional columns, parapet walls, filler walls and the like under the class of secondary structures.

The part of the structure has a special structure, usually comprises, is attached to or overlaps a primary structure, is difficult to create in a space model, and lacks corresponding component types and functions in BIM software such as Revit and the like, so that the creation, differentiation and modification difficulty is high, and the part of the structure is easy to omit, but the loss of the design information can cause great reduction of the refined design value of other parts and difficulty in measuring the consumption of the part of the structure.

Therefore, how to solve the problems of the secondary structure needs a method which meets the technical requirements of design and construction and can quickly and conveniently create the structures, which is a technical problem that needs to be solved by the technical personnel in the field.

Disclosure of Invention

In view of the defects in the prior art, the invention provides the BIM lintel generation method based on the list item, which aims to effectively solve the problem of building the lintel based on the generation component of the list item by taking the generation lintel as a starting point, solve the problem that the default classification of BIM software is insufficient and cannot define rules, and have good practical values on construction quality, design efficiency and metering accuracy.

In order to achieve the purpose, the invention discloses a BIM (building information modeling) lintel generation method based on a list clearing project; the method comprises the following steps:

step 1, selecting a door and window needing to generate a lintel from a BIM model, and automatically filtering the door and window under a non-secondary structure through software;

step 2, identifying all walls under the secondary structure according to the list item classification;

step 3, repeating generation judgment, and checking whether the lintel is generated at a target position before generating a new lintel;

if not, continuing the next step; if the lintel has been generated;

step 4, width acquisition, namely defining a data source for acquiring the width of the door and window under the secondary structure;

step 5, acquiring the top height, and defining a data source for acquiring the top height of the door and window under the secondary structure;

step 6, setting a support, and defining a support rule generated by the lintel;

step 7, setting exceeding, namely setting a processing scheme when the lintel exceeds the wall range;

and 8, calling document New FamilyInstance to create the lintel according to the lintel size and the position information.

Preferably, in step 2, for the lintel to be generated, the walls under all the secondary structures identified according to the list item classification include blockwork.

Preferably, in the step 4 and the step 5, the data source is a certain parameter of the geometric dimension or the corresponding component property.

Preferably, the generation parameters of the lintel are a plurality of the data sources which support definition;

and when the attribute values of a plurality of data sources do not exist or cannot be obtained, the geometric width is continuously obtained, and the necessary parameters are obtained by opening the definition of the data sources and combining the attributes and the geometry.

Preferably, the step 6 comprises the following steps:

step 6.1, defining the height of the beam according to the upper limit of the width of the hole;

and 6.2, defining the length of the lintel support part according to the upper limit of the hole width.

Preferably, the step 7 comprises the following steps:

7.1, defining a processing scheme when the beam length exceeds the wall edge, namely extending to the boundary, and normally generating or not generating;

and 7.2, defining a processing scheme when the beam height exceeds the wall edge, wherein the processing scheme is to extend to the boundary and generate or not to generate normally.

The invention has the beneficial effects that:

the application of the method can solve the problems of lintel generation accuracy and feasibility in the BIM model, solve the corresponding problems of BIM component classification through inventory item identification, define a variable parameter source to adapt to a Revit customized family, intelligently solve the problem that the lintel exceeds the wall range, ensure that the lintel meets the actual requirements of design and construction and fully exerts economic value in the project.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 shows a flow chart of an embodiment of the present invention.

FIG. 2 is a flow chart illustrating the classification of the list recognition wall in one embodiment of the invention.

FIG. 3 illustrates an example application of a conventional model to correctly identify BIM-blurred to a manifest blockwall in an embodiment of the present invention.

FIG. 4 illustrates an example of arbitrarily defining a door width attribute name, such as a double-open door width, in an embodiment of the invention.

FIG. 5 illustrates an example of adding multiple data sources for definition, such as double gate width, in one embodiment of the invention.

Fig. 6 shows an example generated by the lintel in an embodiment of the invention, in which the left side is the wall corner extending to the edge, and the top is the wall edge but separated by the equipment layer, so as to ensure the normal generation of the height of the lintel.

Detailed Description

Examples

As shown in fig. 1, 2 and 6, the BIM generation lintel method based on the inventory item; the method comprises the following steps:

step 2, identifying walls under all secondary structures according to the list item classification;

step 3, repeating generation judgment, and checking whether a lintel is generated at a target position before a new lintel is generated;

if not, continuing the next step; if the lintel has been generated;

step 6, setting a support, and defining a support rule generated by the lintel;

and 8, calling document New FamilyInstance to create the lintel according to the size and the position information of the lintel.

In practical application, the secondary structure is identified through the list item, and the component list item classification is identified, namely the wall under the secondary structure is identified in the step 2, so that the thicker classification in the BIM software can correspond to the specific refined classification in the project list, and an accurate generation rule is defined.

As shown in fig. 3, for example, a wall in the BIM software can be created by categories such as "wall", "conventional model", "volume", etc., but it is impossible to accurately distinguish whether the wall is a concrete wall or a block wall, whether the wall is a primary structure or a secondary structure, etc. After the classification is realized through the identification of the list, the concrete classification in the project can be realized through the list number of the family attribute and the corresponding name of the list item.

Matching according to the list items also has the advantages that the list can be customized according to specialties, regions and even enterprises, generally, the house building type items Revit secondary development plug-ins are more, and the list classification mode aiming at municipal items such as subways, roads and bridges and the like can not be basically met, so that the method can be suitable for being realized by any definable list items, and is wider in range and higher in practicability.

In some embodiments, in step 2, for the lintel that needs to be generated, the blockwalls are included in the walls under all secondary structures identified from the inventory item classification.

In certain embodiments, in step 4 and in step 5, the data source is a certain parameter in the geometry or corresponding component property.

As shown in FIGS. 4 and 5, in some embodiments, the generation parameters of the lintel are a plurality of data sources that support the definition;

when the attribute values of a plurality of data sources do not exist or cannot be obtained, the geometric width is continuously obtained, and the necessary parameters are obtained through the definition of the open data sources and the combination of the attributes and the geometry.

For example, the data source is defined as three attribute parameters of "window width", "window width" and "window opening width", and the window and door member under the secondary structure preferentially identifies the attribute parameter value named "window width", and if not, the window and door member continues to sequentially identify the attribute parameter values named "window width" and "window opening width". If the three attribute parameters do not exist or cannot be read, the geometric width of the door and window component under the secondary structure is calculated as a parameter value.

In step 4 and step 5, because the strong openness of the BIM software enables many parameters and geometric concepts to be self-defined, accurate acquisition of the width, height and wall thickness of the door and window is not fixed and difficult, no solution to the problem is an empty talk, no practical production significance is provided, and the prior art usually avoids the acquisition methods of generating lintel data sources such as the width, height and wall thickness of the door and window.

Because in the prior art, there are generally 2 approaches to obtaining a data source:

the method 1 is obtained from geometry, however, approximate door and window width and geometric center can be conveniently obtained under the condition that the attribute name is uncertain, but some conditions are still wrong, for example, a door and window mounting frame can be mistakenly identified to the size of an opening, a door plate can be mistakenly identified to the position center of a door if a door model is in an open state, and the like. The exact parameter names should be exactly defined in the BIM model by the designer at the time of modeling.

Path 2 is derived from the component properties; when the data source is obtained from the attribute name, if the data source is a fixed attribute name, such as "window width" and "door width", if the parameter names in the family are not consistent, the data source cannot be corresponded, such as "window width" and "door width" which are family attributes in the actual project. Even in the case of multiple different family attribute names in an item, for example, the 3 window family width names in an item are called "window width", "window width" and "window opening width", respectively. But there is no guarantee that the property must be in the family (the family may just be a tile without any parameters) or the property names can be exhausted.

Such problems are difficult to enumerate, and the method of creating the lintel is fundamentally not feasible without properly addressing these problems.

In certain embodiments, step 6 comprises the steps of:

step 6.1, defining the height of the beam according to the upper limit of the width of the hole; the heights of the lintel are respectively 180 and 240 when the upper limit of the hole width is defined as 1500 and 2000;

and 6.2, defining the length of the lintel support part according to the upper limit of the hole width, wherein the support length with the upper limit of the hole width of 1500 and 2000 ranges is simultaneously 250.

In certain embodiments, step 7 comprises the steps of:

In practical application, the complex problem that lintel type secondary structural members are difficult to generate is that the position and the size of a lintel to be placed are not difficult to define, but the problem that whether the position exceeds the wall edge, the wall top and the like is very complicated to consider according to the surrounding environment during generation, even the lintel needs to be automatically calculated and extended to a proper edge, and the lintel is almost impossible to be modified by manually checking one by one, but because some cross-layer members or embedded position extension is not necessary, extension selectivity should be given, which is also an important value point and an innovation point of the method.

Usually, the designed length of the lintel extends to the boundary when exceeding the wall edge, the height is basically the original size without extension treatment, and of course, some items are different schemes, so that the setting of independent separation of 2 links is favorable for better selectivity and reality, and particularly, the algorithm of extension can greatly reduce the modeling difficulty and improve the efficiency.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A BIM generation lintel method based on a list clearing project; the method comprises the following steps:

if not, continuing the next step; if the lintel has been generated;

step 6, setting a support, and defining a support rule generated by the lintel;

2. The BIM generation lintel method based on inventory items according to claim 1, wherein in the step 2, for the lintel to be generated, the walls under all the secondary structures identified according to inventory item classification comprise blockwork.

3. The BIM generation lintel method based on inventory items according to claim 1, wherein in step 4 and step 5, the data source is a certain parameter of geometry or corresponding component property.

4. The BIM generation lintel method based on inventory items according to claim 1, wherein the generation parameters of the lintel are a plurality of the data sources that support definition;

5. The BIM generation lintel method based on the inventory item of claim 1, wherein the step 6 comprises the steps of:

6. The BIM generation lintel method based on the inventory item of claim 1, wherein the step 7 comprises the steps of: