CN113656863B

CN113656863B - BIM generation lintel method based on clear item

Info

Publication number: CN113656863B
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: 2024-01-09
Anticipated expiration: 2041-07-22
Also published as: CN113656863A

Abstract

The invention discloses a BIM generation lintel method based on a clear item; the method comprises the following steps: step 1: picking up doors and windows under all secondary structures; step 2, classifying and identifying the walls under all secondary structures according to the list items; step 3, repeatedly generating and judging, and checking whether the lintel is generated or not at a target position before a new lintel is generated; if not, continuing the next step; if the lintel has been generated, then; step 4, acquiring the width of the door and window under the secondary structure, and defining a data source for acquiring the width of the door and 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 the processing scheme when the lintel exceeds the wall range; and 8, creating the lintel according to the lintel size and the position information. The method and the device can solve the problems of the accuracy and feasibility of lintel generation in the BIM model.

Description

BIM generation lintel method based on clear item

Technical Field

The invention relates to the technical field of computer aided design, in particular to a BIM generation lintel method based on a clearing item.

Background

Under the policy requirements of fine management and informatization management of construction projects, under the BIM model acceptance system, the BIM model and the data are synchronously submitted except traditional project data and drawings, and a rvt format file of Revit software is usually used as the main part. The BIM technology is utilized for design and simulation construction, so that project construction scheme quality and cost can be effectively controlled, and the advanced discovery and reduction of reworking of design and construction problems are facilitated. With the gradual maturity of BIM technology, the modeling depth is continuously improved, the coverage rate of common structures, buildings and installation projects can be more than 90%, but some parts are difficult to completely reach the stage of deepening design, such as lintel, constructional columns, parapet walls, infill walls and the like under secondary structures.

This part of the structure has a special structure, usually comprises, adheres to or overlaps on a primary structure, is difficult to create in a space model, and lacks corresponding component types and functions in BIM software such as Revit, so that the building, distinguishing and modifying difficulties are high, and therefore, the building, distinguishing and modifying difficulties are often omitted, but the loss of the design information can lead to great discount of the fine design value of other parts, and the consumption of the building, the adhering and overlapping structure is difficult to measure.

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

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the invention provides a BIM generating lintel method based on a list item, and the aim of the invention is to take the generating lintel as a starting point and to generate components based on the list item, so that the problem of building such components can be effectively solved, and meanwhile, the problem that rules cannot be defined due to insufficient default classification of BIM software can be solved, thus having good practical value for construction quality, design efficiency and metering accuracy.

In order to achieve the above object, the present invention discloses a BIM generation lintel method based on the order of the clearing items; 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, repeatedly generating and judging, and checking whether the lintel is generated or not at a target position before a new lintel is generated;

if not, continuing the next step; if the lintel is already generated, skipping the generation of the lintel;

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

step 5, jacking and acquiring, namely 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 the processing scheme when the lintel exceeds the wall range;

and 8, calling a document.NewFamiliyInstance to create the lintel according to the lintel size and the position information.

Preferably, in the step 2, for the lintel to be generated, the wall under all the secondary structures identified according to the list item classification includes a block wall.

Preferably, in said step 4 and in step 5, said data source is a certain parameter in the geometry or the properties of the respective component.

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

and continuously acquiring the geometric width when the attribute values of a plurality of data sources do not exist or cannot be acquired, and acquiring the necessary parameters by opening the definition of the data sources and the combination of the attribute and the geometry.

Preferably, the step 6 includes the steps of:

step 6.1, defining the height of the passing beam according to the height dimension of the beam and the width of the hole;

and 6.2, defining the length of the bridge support according to the width of the hole.

Preferably, the step 7 includes the steps of:

7.1, the beam length exceeds, and a treatment scheme when the beam length exceeds the wall edge is defined to extend to the boundary, and is normally generated or not generated;

step 7.2, beam height exceeding, defining the treatment scheme when the beam height exceeds the wall edge, extending to the boundary, and generating normally or not.

The invention has the beneficial effects that:

the method can solve the problems of the accuracy and feasibility of the lintel generation in the BIM model, solves the problems corresponding to the BIM component classification through the list item identification, has the definition of a variable parameter source to adapt to the Revit custom family, intelligently solves the problem that the lintel exceeds the wall range, meets the actual requirements of design and construction, and fully plays an economic value in the item.

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

Drawings

Fig. 1 shows a flow chart of an embodiment of the invention.

FIG. 2 is a flow chart illustrating inventory identification wall classification in accordance with an embodiment of the invention.

FIG. 3 is a diagram illustrating an example application of correctly identifying a conventional model with fuzzy BIM classification to a checklist block wall in accordance with an embodiment of the present invention.

FIG. 4 is a diagram showing an example of arbitrarily defining a door width attribute name, such as a double door width, in accordance with one embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of adding multiple data source definitions, such as a double open width, in an embodiment of the invention.

Fig. 6 shows an example of the generation of a lintel in an embodiment of the invention, with the left side extending from the corner of the wall to the edge and the top being the edge of the wall but separated by the equipment layer to ensure proper beam height generation.

Detailed Description

Examples

As shown in fig. 1, 2 and 6, a lintel method is generated based on BIM of the clearing items; the method comprises the following steps:

step 2, classifying and identifying the walls under all secondary structures according to the list items;

if not, continuing the next step; if the lintel is generated, skipping the generation of the lintel;

step 4, acquiring the width, namely defining a data source for acquiring the width 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 the processing scheme when the lintel exceeds the wall range;

In practical application, the secondary structure is identified through the list items, the thicker classification in BIM software can be corresponding to specific refined classification in the engineering project list through identifying the component list items, namely, the wall under the secondary structure is identified in the step 2, so that accurate generation rules are defined, and if the correspondence of the initial classification is not available, the method for generating the trabeculae is difficult to apply to the actual project, and is one of the difficulties of intelligently creating the secondary structure in the BIM model, namely, the identification of the components.

As shown in fig. 3, for example, the wall in the BIM software can be created by the categories of "wall", "regular model", "volume", etc., but the problems of whether the concrete wall is a block wall, a primary structure or a secondary structure, etc. cannot be accurately distinguished. After classification by list identification, specific classification in the project can be corresponding to the list item name by the list number of the family attribute.

According to the list item matching, the list can be customized in professions, areas and even enterprises, and usually, house building type items are provided with more secondary development plug-ins, and the list classification mode aiming at municipal items such as subways, roads and bridges cannot be basically met, so that the method can be suitable for being realized by any definable list item, and has wider range and higher practicability.

In certain embodiments, in step 2, for the lintel to be generated, the masonry walls are included in all secondary structure walls identified by 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 properties.

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

the geometric width is continuously acquired when the attribute values of the plurality of data sources are not existed or are not acquired, and the necessary parameters are acquired through the definition of the open data sources and the combination of the attribute and the geometric.

For example, three attribute parameters of "window width", "window width" and "window opening width" are defined as data sources, and the door and window component under the secondary structure preferentially recognizes the attribute parameter value named "window width", and if not, the attribute parameter values named "window width" and "window opening width" are sequentially recognized. If none of the three attribute parameters exists or cannot be read, the geometric width of the door and window member under the secondary structure is calculated as the parameter value.

In step 4 and step 5, since the strong openness of the BIM software allows many parameters and geometric concepts to be customized, accurate acquisition of the width, height and wall thickness of the door and window is free of fixed methods and difficult, and nothing to solve the problem is blank, and the prior art generally avoids the acquisition methods of the width, height and wall thickness of the door and window for generating the lintel data source without practical production significance.

Because in the prior art, there are typically 2 ways to acquire a data source:

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

Pathway 2 is derived from the component properties; when the data source is obtained from the attribute names, if the data source is a fixed attribute name, such as 'window width', 'door width', the data source cannot correspond to the fixed attribute name when the parameter names in the families are inconsistent, and the attribute of the families in the real project is called 'window width', 'door width'. Even if there are multiple different family attribute names in one item, for example, 3 window family width names in one item are called "window width", and "window hole width", respectively. There is no guarantee that there must be this property within a family (a family may also simply have no parameters for the individual tiles) or that the name of the property can be exhausted.

Problems such as these are difficult to exhaust and the method of creating the lintel is not straightforward if the problems are not properly addressed.

In certain embodiments, step 6 comprises the steps of:

step 6.1, defining the height of the passing beam according to the height dimension of the beam and the width of the hole; the height of the trabeculae with the upper limit of the hole width being 1500 and 2000 is 180 and 240 respectively;

step 6.2, defining the length of the bridge support according to the width of the hole, wherein the length of the support with the upper limit of the hole is 1500 and 2000 is 250.

In certain embodiments, step 7 comprises the steps of:

In practical application, the complex problem that the secondary structural members of the lintel type are difficult to process is not difficult to define the position and the size where one lintel is to be placed, but if the problem that whether the lintel is beyond the wall edge, the wall top and the like is considered according to the surrounding environment during the production is very complex, even the extension to the proper edge needs to be automatically calculated, the modification is almost impossible by manually checking one by one, but because some cross-layer members or embeddable position extension is not necessarily required, the extension selectivity is given, and the important value point and the innovation point of the method are also important points.

The design length of the lintel extends to the boundary when exceeding the wall edge, but the height is basically the original size, and no extension treatment is carried out, and of course, some projects are different schemes, so that the independent and separate setting of 2 links contributes to better selectivity and authenticity, and particularly an extension algorithm can greatly reduce modeling difficulty and improve efficiency.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. Generating a lintel method based on the BIM of the clearing item; the method comprises the following steps:

for the lintel to be generated, the building block walls are included in the walls under all the secondary structures identified according to the list item classification;

the generation parameters of the lintel are a plurality of data sources supporting definition;

when the attribute values of a plurality of data sources do not exist or cannot be obtained, continuously obtaining the geometric width, and obtaining the necessary parameters by opening the definition of the data sources and the combination of the attribute and the geometric;

the data source is a parameter in the geometry or corresponding component properties;

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

6.2, defining the length of the bridge support according to the width of the hole;

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

step 7.2, the beam height exceeds, define the treatment scheme when the beam height exceeds the wall edge, extend to the boundary, normal generation or not;