The scheme and achievement on CAD system for hydro-structure

Hydraulic structures were located in the wild environment, and the size and type of structure in each project are different. In addition, what designers need is efficient reinforcing steel bar CAD system, and how to solve this problem is the key of the success in hydraulic CAD system development. This refers to external taxonomy, and classifies the hydro-structures in detail, and acquires the system's efficiency utility at the cost of code repetition. In the paper, the authors propose the CAD system solutions about steel bar drawing of hydraulic structures, and realize the CAD system on invert siphon and sluice structure. In the end, the paper describes the inverted siphon structure as example to explain the system program architecture and implementation process. In the system, all of inverted siphon pipes, only box, and steel bar types have been classified by their type, and wrapped in many common classes, which is convenient for developing the system, also for the reusability and portability of the codes. The system realizes automated design for inverted siphon pipe, involving load input, internal force calculation, reinforcement calculation and steel-bar drawing plotting. It gives a method for CAD system development on hydraulic engineering.