DSABridge® (Deck Slab Arch Bridge)

The existing Box type CSS bridge structure is a mechanical structure with bending moment dominant unlike the axial force governance structure of the Arch type CSS. In order to maintain the cross section of BOX shape type, both side edges (hunch) with the greatest change in curvature occur in the form of a negative moment, and the upper part (Crown) has the structural characteristic to receive the positive moment.

The upper part (Crown) connects the shear connection material connecting the CSS and the slab to the stress relaxation slab to secure the corresponding member force against the positive moment generated at the upper part.

The stress generation range of the hunch part is calculated by measuring the stress range at a certain distance per span and by ensuring the rigidity against the engineering backfill zone by constructing the side wall with high quality soil and filled concrete inside the side wall, .

The design method is designed by the recently revised highway bridge design standard (LSD method, Korea) and it applies the required load (KL-510, HS) and design condition by modeling same as the actual structure using MIDAS GTS NX program.