To　investigate　the　seismic　pounding　response　of　long-span　bridges　with　high-piers　under　strong　ground　motions,　shaking　table　tests　were　performed　on　a　1/10-scaled　bridge　model　consisting　of　three　continuous　spans　with　rigid　frames　and　one　simply-supported　span.　The　seismic　pounding　responses　of　this　bridge　model　under　different　earthquake　excitations　including　the　uniform　excitation　and　the　traveling　wave　excitations　were　experimentally　studied.　The　influence　of　dampers　to　the　seismic　pounding　effects　at　the　expansion　joints　was　analyzed　through　nonlinear　dynamic　analyses　in　this　research.　The　seismic　pounding　effects　obtained　from　numerical　analyses　of　the　bridge　model　are　in　favorable　agreement　with　the　experimental　results.　Seismic　pounding　effect　of　bridge　superstructures　is　dependent　on　the　structural　dynamic　properties　of　the　adjacent　spans　and　characteristics　of　ground　motions.　Moreover,　supplemental　damping　can　effectively　mitigate　pounding　effects　of　the　bridge　superstructures,　and　reduce　the　base　shear　forces　of　the　bridge　piers.