Study On CAD Tendon Arrangement Of Pestressed Concrete Continuous Beam Bridge

During the development of bridge construction in China, prestressed concreted continuous beam bridge has been one of the bridge types which are adopted generally at present with its unique advantages. Also the bridge with this type has accumulated many experiences in design and construction. The tendon arrangement and drawing the construction blueprint of tendon are very important in design of prestressed concreted continuous beam bridge, especially those use cantilever construction method. The rationality of tendon arrangement influence directly mechanical property and functional performance of bridge. But the rational arrangement, which need iterative trail, include a great deal of calculation and demand that the designer must have plenty of experiences in design. Furthermore, drawing construction blueprint of tendon, faced with complex tendons, is fallible because of its heavy work. This mistake will result in the difference between design and the construction blueprint. These problems above could influence directly functional performance of bridge.Considering these problems in actual design as mentioned above, the research of tendon arrangement in prestressed concrete continuous beam bridge and the program exploitation are put in this thesis. The tendon optimization model is established by the mathematical programming method. Also the system of the tendon arrangement and the drawing system of construction blueprint of tendon are established by the object-oriented technology and the programming method. The program system under the platform of AutoCAD is carried out by the toolkit of second developing: AutoCAD's ObjectARX. The program module includes two parts: the tendon arrangement and drawing the construction blueprint of tendon in prestressed concrete continuous beam bridge. The integration between the design calculation and the drawing construction blueprint of continuous beam bridge is carried out by this program module. With the integration, the designer could extricate themselves out of the heavy work. So the period of design could be reduced and the design quality could be ensured. This system is tested in prestressed concrete continuous beam bridge and the result proves that the effect of this system is good. Some of the design drawings are illustrated in the appendix one of this thesis.