| Starting from the purpose of practical application, European Union of Steel Structure implemented the CIMsteel project plan in 1987, aiming to establish a data standard including design, calculation, construction management and steel processing. Hard endeavor of almost 10 years is to turn the CIS/1.0 to reality in 1996.And then, the CIS/2.0 in 2002.This paper analyzes the processing of writing input/output programs in space structure by CIS, and also some key elements which can be applied directly in space structure without modified, after introducing the CIS standard and EXPRESS language which is used to define the CIS elements. In this case that nobody in China have adjusted the CIS, this paper defines some key elements such as bolt ball, socket of domestic specification, a program that converts data produced by STCAD to the format of SAP2000 for the purpose of CIS practical application. Finally, the advantages and disadvantages of CIS are introduced and also the development trend.Due to the development of computer technology, the construction industry has also developed rapidly. Take AUTOCAD, ARCHI CAD for example,the CAD softwares are also on a new stage. CAE field of finite element method is represented by ANSYS, ABQUS. The structural design softwares are different from each other for their different developer, including SAP2000, STAAD.pro, TEKLA and PKPM, Guangsha. While in the other fields such as management and budget, Qinghua Sville and God are often used.However, these softwares are independent, both of the whole system and parts of it. For example, the data can not be shared by AUTOCAD and ARCHI CAD. In this way, two designers may have trouble communication for it is not easy for people to get familiar with a lot of softwares. Besides, sometimes it is required to contrast results of two analysis software on the same project for the sake of safety or processing.Designer will build model twice, which means lots of money and time are wasted. In fact, a skilled designer's main task is to design model and check results, rather than to do something purely mechanical. The research of data conversion between softwares is of great importance in applications.Software for data conversion is gathering momentum and is there to stay. As a result of the large number of applications of AUTOCAD, the definition of DXF text format become the factly standard for data conversion. In fact, the deficiencies of DXF standards are very clear, for example, the text is too large, there is almost only one date--the pure geometric model data, and information loss may occur in conversion.Therefore, the reunification of the construction industry data standards is the best way to solve this problem, and also the main trend of study in the world. Previously, ISO (International Standards Organization) has established the industry standards (standard product model), including the construction, machinery, electrical appliances industry. But, because the scope is too broad to meet the appropriate role, data conversion can be achieved only in a relatively small field, for example, machinery manufacturing.According to the above, it is obviously that the research of a unified data standard in construction industry is of great prospect application and research value. In this paper, the usage of CIS standards is introduced with a detailed description. And also, the prospect and application of space structure in China. The data conversions between different softwares are achieved. This paper also provides examples of CIS application. I hoped it will stimulate more ideas from others. |
