Computer applications in different areas of structural engineering such as analysis, design, construction and project management are mostly written in procedure-oriented languages and they are presently fragmented in nature. It is well-recognised that use of integrated computer applications would lead to saving in time and cost in design and construction of structures and infrastructural facilities. Vigorous efforts are being made world-wide to develop methodologies for integration by making use of latest developments in Information and Communication Technologies (ICT) such as object-oriented modeling, information/data exchange standards, integrated data bases, 3-D/4-D modeling, virtual reality, network and world-wide web. Object-oriented modeling is being used in all these technologies to facilitate integration and extensibility. The paper presents an object-oriented framework for integrating legacy computer applications in structural engineering. Details of an object-oriented model for integrating legacy computer applications of analysis and design of RC frames are presented by using the Unified Modeling Language (UML) and the Case Tool: Rational Rose. Working of the OO model has been demonstrated with an example of implementation of integration of legacy structural analysis and design programs for design of an RC frame.
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