Using　interior　shear　keys　as　structural　fuses　to　provide　transverse　support　for　superstructures　when　subjected　to　seismic　loading　has　been　widely　adopted　in　short-　to　medium-span　bridges.　Six　specimens　with　different　shear-span　ratios,　vertical　reinforcement　ratios,　and　construction　joint　types　were　designed　based　on　the　current　Chinese　seismic　design　guidelines.　These　specimens　were　tested　subjected　to　reversed　cyclic　lateral　loading,　and　three　failure　modes　(that　is,　diagonal　tension　failure,　sliding　shear　failure,　and　sliding　friction　failure)　were　observed　during　the　tests.　Two　analytical　models　were　developed　to　predict　the　force-displacement　envelope　response　of　interior　shear　keys　with　monolithic　and　resilient　construction　joints,　respectively.　The　analytical　results　were　in　good　agreement　with　the　experimental　data.　The　interior　shear　keys　with　resilient　construction　joints　presented　satisfactory　displacement　capacity,　and　limited　the　damage　resulting　from　the　seismic　loading　in　the　shear　keys　and　cap　beams.