The　cured-in-place　pipe　(CIPP)　liner　technology　involves　installation　of　flexible　polymeric　composite　liners　coated　with　thermosetting　resin　to　the　inner　surfaces　of　existing　pipelines.　This　innovative　technology　provides　an　efficient,　economic,　and　environmentally　friendly　method　for　rehabilitation　of　structurally　compromised　underground　pipelines　without　expensive　and　disruptive　excavation.　However,　the　unverified　and　unquantified　seismic　performance　of　CIPP　liner-reinforced　pipelines　under　earthquake　transient　ground　deformations　(TGD)　remains　a　barrier　to　the　deployment　of　this　technology　in　seismically　active　regions.　Full-scale　quasi-static　and　dynamic　tests　were　performed　on　five　water-pressurized　ductile　iron　(DI)　pipelines,　with　150-mm　(6.0-in.)　nominal　diameter　and　9.14-m　(30-ft)　nominal　length,　reinforced　with　one　type　of　CIPP　liner　commonly　used　in　engineering　practice.　This　paper　evaluates　experimentally　the　behavior　of　the　liner-strengthened　DI　pipelines　under　static　loading　and　also　quantifies　their　seismic　response　under　TGD-induced　tensile　axial　loads.　The　test　results　indicate　that　CIPP　liner　provides　substantial　longitudinal　tensile　stiffness　and　strength　to　the　joints　of　DI　pipelines　and　improves　significantly　their　seismic　behavior　under　high-intensity　TGD.　(C)　2016　American　Society　of　Civil　Engineers.