| This thesis presents an original 4-D model for representing crane motion on a construction jobsite. The 4-D model includes positional data in terms of a standardized X, Y, Z coordinate frame-of-reference that is considered appropriate for such a jobsite. Being a 4-D model, it also includes a standardized time-frame for the crane kinematic behavior; the time-frame is expected to be consistent with computations for construction operations simulation models. The thesis includes feedback on the perceived utility of the model from various experts in academia and industry. The thesis includes an HTML-like format for structuring the 4-D data called a CSX file. There are two test applications of the model and the CSX file. In one case, a CAD system is used to produce some realistic crane motions and a CSX file. In the other application, a few crane lifting parameters are used as input to a computer program, developed as part of the work, which automatically generates potential lifting motions and a CSX file. The CSX file is used in a customized graphics application to demonstrate an animation of the crane operation. The test cases and investigations indicate that the 4-D model data and methods can be considered valid for various crane operations on construction jobsites. Therefore, the 4-D model could now be included in simulation and operational improvement programs. |
