Page 91 - Built Expressions - Online Construction Magazine - November 2014 Issue

Hulk Mechanised simulator.com simulator.com During the Knowledge Acquisition stage it was found that 3D Facility Main Display is activated. experts in the domain of crane selection use different strategies The 3D Facility Main Display (explained in previous sections) to solve problems related to a provides the user with information on crane’s selection. These strategies have been incorporated in the selected case based on the user’s developing the system. previous responses to questions posed by the system. The type of the facility, i.e. Offce Building, and its group is displayed as shown in Fig. (4). At and concrete construction was used. this stage the user can activate other including: (shape of the building, type The building is 45 meters high, 45 options or make changes to his/her of the structure, i.e. concrete or steel, meters long, and 45 meters wide. previous responses by choosing the construction program, site constraints, These dimensions fall in the group command back to building types and fnancing method). Based on the of mid- height, mid-length, and mid- (BACK-type). Having selected a inputs, the system guides the user width category of building groups. It is case from ALL Shapes Panel, which through the selection process using required to select a crane or cranes to contains a list of other scenarios, for either the Knowledge-Based or/and be used in constructing this facility. further evaluation the system activates the Case- Based modules. At the end of Facility type, kind and dimensions the 2D Plan Display option. the session the user is presented with are determined frst from the Facility In the Facility (2D) Plan Display different alternatives of technically Kind and Height Displays. Further the the actual case appears frst showing feasible cranes for the given building. These alternatives are thereafter, validated using graphical simulations, to establish the crane’s position(s) and working range(s) on site. The system fnally decides on the number, type(s), positions of crane(s), their operational methods and costs. This output is further checked for its compliance with the contractual and the economical constraints including: The availability of the selected crane(s), whether it can meet the construction program in terms of capacity and production rates, the effect of the selected crane(s) on the structural and architectural design, and fnally the cost of operating the selected crane(s). Case Example To validate the effectiveness of the system a case which consists of an offce building with a composite steel Fig. 5 Plan View of the Tower Crane Vol: 3 Issue: 11 November 2014 Built Expressions PG91