A　simplified　bridge　model　suitable　for　parametric　study　of　curved　highway　bridges　with　stiffness　eccentricity　is　presented.　The　proposed　model　is　simple,　yet　it　captures　essential　features　that　affect　the　dynamic　response　of　curved　bridges.　Using　this　simplified　model,　formulas　for　computing　earthquake　response　of　curved　bridges　are　presented　and　parameters　that　significantly　influence　the　dynamic　response　of　curved　bridges　are　identified.　The　study　indicates　that　the　response　of　a　given　curved　bridge　depends　on　the　radius　of　the　curved　bridges,　width　of　the　deck　and　central　angle　of　the　curved　bridges.　The　calculated　results　of　natural　frequencies　for　the　proposed　bridge　system　are　illustrated　in　tables　and　diagrams.　These　results　can　be　employed　in　preliminary　seismic　design.