Abstract
The seismic behavior of a deck-type steel arch bridge composed of parallel twin ribs with lateral members is investigated in this chapter. The restoring force model incorporating the interaction curves of stiffened short arch ribs subjected to compression by in-plane and out-of-plane bending moments is analyzed numerically using MARC. A nonlinear seismic response analysis of a deck-type steel bridge arch is carried out, by which the effects of a RC floor slab stiffness and interaction curves are examined. The influence of interaction curves on the interpretation for yield resultant forces is shown to be a significant factor in the seismic behavior of arches. The 3-dimensional seismic analysis of a deck-type arch bridge composed of parallel twin ribs with lateral members subjected to ground acceleration is theoretically analyzed. A parametric study is conducted using the finite element method (FEM) analysis and nonlinear seismic response analysis methods by considering the effect of interaction curves on yield resultant forces and the nonlinear seismic behavior of a deck-type arch bridge.
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