EXPERIMENTAL RESEARCH ON IN-PLANE BEHAVIORS OF BOX ARCH WITH CORRUGATED STEEL WEBS AND CONCRETE FLANGES

A composite box arch with corrugated steel webs and concrete flanges is a new type of arch structures. The experiment of this new composite box arch model under asymmetrically in-plane loading is carried out. A FE model is established and its dual nonlinear behavior in the whole process is analyzed. The FE analysis result achieves good agreement with that of the experiment. Research results show that the longitudinal strain of model arch meets the assumption of Quasi-Plane-Section in the elastic stage and the effect of shear deformation should be taken into account in the calculation of its deformation. Compared with the conventional reinforced concrete box arch and the composite box arch with plain steel webs and concrete flanges, the calculation method for the ultimate load of this new composite box arch is provided.