Local　failure　(loss　of　concrete　or　reinforcement)　will　significantly　affect　the　bearing　capacity　of　the　shield　segment,　and　even　lead　to　the　damage　of　the　tunnel　structure.　To　clarify　the　influence　of　local　failures　on　the　bearing　capacity,　full-scale　tests　were　carried　out　on　the　standard　segment,　mid-span　and　side　opening　segments　respectively.　Displacements　and　concrete　strains　of　these　segments　were　monitored　during　the　loading　procedure.　The　loading　process　of　the　segment　can　be　divided　into　four　stages,　and　each　stage　has　a　critical　load　that　can　be　defined　as　the　characteristic　load.　According　to　each　characteristic　load　value,　the　bearing　characteristics　of　the　segment　were　compared　and　analyzed.　The　analysis　results　show　that　the　bearing　capacity　of　the　opening　segment　is　lower　than　that　of　the　standard　segment,　and　the　opening　position　has　a　strong　influence　on　the　bearing　characteristics.　To　further　clarify　the　accuracy　of　test　results,　numerical　simulations　were　conducted　by　using　the　elastoplastic　damage　constitutive　behavior　of　concrete,　and　the　reasonableness　of　the　experiment　results　were　verified　by　comparing　with　the　simulation.　According　to　the　bearing　characteristics　of　the　standard　segment,　the　influence　of　the　opening　diameter　and　position　on　the　bending　bearing　characteristics　of　the　partially　failed　segment　was　quantitatively　analyzed.　This　paper　preliminary　proposed　a　calculation　model　of　the　bearing　characteristics　for　the　local　failed　shield　segment　which　can　provide　a　theoretical　basis　for　the　safety　assessment　and　reinforcement　design　of　shield　tunnels　under　extreme　conditions.　©　2023　Xi＇an　Highway　University.　All　rights　reserved.