The　aim　of　this　study　was　to　examine　the　seismic　performance　of　reinforced　concrete　shear　walls　in　in-plane　and　out-of-plane　directions　under　single　main　shock　and　mainshock-aftershock　sequences.　Two　shear　wall　specimens　were　designed　for　low　cycle　load　tests　to　withstand　in-plane,　in-plane　then　out-of-plane　(IP-OP),　out-plane,　and　out-of-plane　then　in-plane　(OP-IP)　forces,　respectively.　The　seismic　performance　of　shear　walls　under　different　forces　was　assessed　by　analyzing　macroscopic　failure　phenomena　and　the　novel　performance　parameters　of　specimens,　following　which　their　damage　status　was　evaluated.　The　specimens　were　simulated　using　finite　element　software,　and　two　frame　shear　wall　structural　systems　were　designed　so　that　non-linear　time　history　analysis　could　be　performed　to　assess　the　deformation　and　damage　to　the　shear　walls　in　the　two　directions　of　the　plane　under　a　single　main　impact　and　different　input　directions　of　mainshock-aftershock　sequences.　The　results　revealed　that　following　damage　in　the　in-plane　direction　of　the　shear　wall,　seismic　capacity　decreased　significantly　if　it　was　subjected　to　a　force　in　the　out-of-plane　direction　once　again,　and　the　degree　of　damage　under　the　earthquake　action　of　mainshock-aftershock　sequences　was　significantly　higher　than　that　under　the　single　main　shock　action.　Therefore,　it　is　necessary　to　pay　special　attention　to　the　seismic　performance　of　the　out-of-plane　direction　of　the　shear　walls　and　examine　the　seismic　performance　of　the　structural　system　under　different　input　directions　of　mainshock-aftershock　sequences.