At present, most structural designs of light-weight steel framing system are still applying traditional methods of 2D CAD drawings and standard atlas, which will certainly fail to meet the needs of digital design and intelligent construction in the future. According to the structural form and characteristics of the light-weight steel framing system, this paper proposes a parametric structural design method of the light-weight steel framing system through BIM application, considering the relevant design specifications of cold-formed thin-walled steel. A special design module is also achieved through the Revit API technology programming to realize the core functions including automatic layout of light steel keel, automatic drawing, output of detailed report of quantities, and etc., which provides references for the realization of intelligent design and intelligent construction of the light-weight steel framing systems.

An OGRE-based BIM information visualization platform is eatablished by transfering the geometry representation of the IFC entity to the triangular net of surface that OGRE can recognize, and by building the connective mechanism between graphic and non-graphic information. This platform can quickly display the 3D-BIM modeling and read the file with the general BIM file format, and can save and manage the information of the 3D modeling, as well as excative interactive query between the graphical information and the non-graphic information.

ObjectARX is a DLL that can make a quick access to AutoCAD Graphic database. The parametric function of the new version AutoCAD is also realized by ObjectARX redevelopment. This paper mainly analyses possible dimension constraint operation mechanism of CAD parametric function.

An integrated CAD / CAM software system of steel industrial plant structures is developed based on the BIM application. The system is composed of two seamlessly integrated modules: structure calculation module and post-process module, the interface between the modules is clear. And, the complexity of the software development is effectively reduced by this design patterns. Using object oriented programming technology, a series of intelligent solid classes are abstracted to describe parts with deferent geometric information, structure properties and design requirements in real structure. Objects which are instances of these hierarchical C++ classes and logical links between them were integrated into the AutoCAD drawing database to construct a three-dimensional model. Several key functions including parametric shortcut modeling, frames analysis and member checking, three-dimensional solid construction, node design and editing, and drawing generation are implemented. IFC interface and the interface with SAP, ETABS and MIDAS are also implemented.

A complete BIM model consists of the models of multiple professions. In the BIM design of the electric- power industry, different professions are designed by using different platforms, and then all professional models are integrated on a public platform. During the process, data form different platforms need to be converted to the public platform. According to the requirements of Shanxi Electric Power Co., Ltd., this paper studies the data exporting from the structure-model to Revit. All information of 3D entities and tower segments is input into Revit through IFC files, achieving the integration of structural model with other professional models. Lastly, the paper also illustrates the limitations and shortages of data exchange using IFC files.

At present, in the bidding process of steel structure enterprises, the communication among the marketing personnel, the designers and the owners is not convenient, which greatly reduces effect of external publicity of steel structure enterprises. Based on BIM, the paper develops a marketing system for steel structure manufacturer companies, which includes the steel design system and the web display platform. The two platforms use the JSON to transform data with each other through the Internet. The marketing system enhances the connection among the marketing personnels, the designers and the owners, and is able to display the models to owners more intuitively than ever, which increases the communication efficiency and improves the propaganda effect.

BIM agrees with prefabricated building naturally. Thus this paper puts forward a view point that the value of BIM embodies in the fact that its 3D entity model provides the basic digital object for management collaboration. Around this viewpoint, this paper discusses the technical characteristics and application direction of BIM, including the version iteration, component recognition, model manipulation, and etc. Then, based on the discussion above, the key technical problems and solutions are explored, including the lightweight strategy based on data form, hybrid application of database, model display and control and associated management information on Web, QR code and RFID, and etc. At last, the prototype system is developed, and its effectiveness is verified through the actual engineering case.

BIM is difficult to be applied in the management of whole course.This paper has analyzed and has discussed its common causes, then has made further improvement and optimization based on IFC model server. The BIM engine that can be embedded in other management systems is built, and is combined with assembly construction management system and OA process management system in practice, to achieve the Modular Construction Information System based on BIM. It has addressed those common problems of BIM information system in a better way.

As the core concept of BIM technology, IFC is a general data exchange standard developed to improve the collaborative capabilities of all parties in construction projects. In order to solve the complex definition and inefficiency of the traditional IFC data storage based on object-relational database, this paper proposes a new IFC data storage model for data exchange through IFC XML format based on the object hierarchical database and introduces various technical difficulties and solutions in the process of pattern mapping. The database design were verified by experiments. This research has certain reference value for the effective management and utilization of IFC data.