The　cured　in　place　pipe　(CIPP)　liner　technology　is　to　install　flexible　polymeric　liners　with　thermosetting　resin　inside　existing　pipelines.　Compared　with　traditional　methods　of　pipeline　retrofits,　CIPP　provides　an　economic　and　environmentally　friendly　alternative　for　pipeline　rehabilitation.　However,　the　lack　of　proper　constitutive　models　of　the　push-on　joints　and　the　CIPP-liner　reinforced　joints　remains　a　critical　deficiency　in　current　numerical　simulations　of　buried　segmental　pipelines.　This　paper　presents　new　constitutive　models　of　ductile　iron　(DI)　push-on　joints,　before　and　after　reinforced　with　one　type　of　the　CIPP　liners,　commonly　used　in　pipeline　retrofits.　The　proposed　models　were　calibrated　from　the　full-scale　quasi-static　tests　performed　on　water-pressurized　DI　pipelines　with　push-on　joints.　These　new　joint　models,　considering　strength　degradation　and　energy　dissipation　of　the　joint,　well　characterizes　the　longitudinal　behavior　of　the　push-on　joint　and　the　liner-strengthened　joints　under　repetitive　axial　loading,　which　primarily　represents　the　expansion　and　contraction　effects　of　the　joints　due　to　thermal　effects　or　seismic　waves　traveling　along　the　buried　pipelines.　Moreover,　this　paper　also　provides　a　rational　procedure　for　evaluating　the　seismic　performance　of　buried　pipeline　with　different　push-on　joints.　The　proposed　numerical　procedure　could　be　generally　applied　to　quantify　the　seismic　performance　of　buried　straight　pipelines　incorporating　the　proposed　joint　models　under　seismic　wave　propagation.　Numerical　results　indicate　that　the　CIPP　liner　can　significantly　improve　the　seismic　performance　of　the　push-on　joints　subjected　earthquake　induced　transient　ground　deformations.