Abstract
Prestressed concrete (PC) is the most popular superstructure of bridges in Taiwan. Some fundamental points in design of which including the layout and prestressing force of tendons, configuration of girder cross-section, time dependent effect of creep and shrinkage, and the construction method, etc. should be displayed in the engineering drawing. The efforts on man-made drawing are not only significant time-consuming but also inevitable mistaking. This thesis intends to develop an automatic design and drawing system to complete the tedious works of drawing making for PC bridges. In this thesis, the Visual Studio C# programming language is employed to control the AutoCAD in building Window-based platform and connect software Midas Civil for developing the automatic design and drawing system of PC bridges. In the developed system, the process of tendon-prestressing in each construction stage is able to be well defined and the complex geometric information of all the tendons in three dimension space can be established and displayed accordingly. The center of gravity of strands (C.G.S.) for the adopted tendons calculated is used to check the consistency with those of structural model. The accuracy of structural analysis can be recheck and performed again in case that the inconsistency has been found. Besides, the resulting automatic drawing successfully shows the details of all the specific cross-sections of PC girders as well. The results obtained could benefit the engineers a more rapid and efficient tool in PC bridge design.
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