Abstract
Recently, a developed form of the PC box girders using corrugated steel web are flourishingly under construction at many sites. The form begins to be used for the continuous girders and the usage expected to be developed even for the cable stayed bridges. Since the corrugated web does not possess rigidity along the span axis, the influence due to shear deformation strongly appears under bending. The authors have developed an elastic equation extending beam-bending theory considering shear deformation. Expanding the equation, the advanced structural analysis by the theorem of dual three-moment method and the CWB (Corrugated Web Beam) matrix displacements-method are formularized. The knowledge introduced through the analysis is so important that the practical bridge engineers should take it into their consideration.
