Tunnels,　as　critical　underground　infrastructures,　often　intersect　with　faults.　Field　investigations　have　underscored　the　susceptibility　of　fault-crossing　tunnels　to　extensive　damages　during　earthquakes.　Hence,　large-scale　shaking　table　tests　are　conducted　to　investigate　the　deformation　pattern　and　failure　mechanism　of　fault-crossing　tunnels　under　transverse　excitation,　particularly　in　non-rupture　scenarios.　The　dynamic　behavior　of　the　tunnel,　as　expected,　is　dominated　by　the　surrounding　strata.　Acceleration　responses　vary　notably　across　different　regions　of　the　fault　site.　The　disparity　increases　with　the　increments　of　seismic　intensity　and　input　frequency.　The　tunnel　section　at　the　interface　between　the　fault　and　the　hanging　wall　manifest　the　strongest　acceleration,　where　the　largest　strains　of　the　tunnel　and　most　of　the　lining　cracks　also　occur,　highlighting　its　vulnerability　to　seismic　vibrations.　The　damage-induced　non-linearity　of　the　tunnel　is　then　identified　by　the　decreasing　dominant　frequency　thereof.　The　fault-crossing　tunnel　exhibits　unique　three-dimensional　shearing-torsional　deformations,　elucidated　through　the　test　data　and　an　analytical　model.　This　deformation　pattern　provides　a　better　understanding　of　the　seismic　responses　of　fault-crossing　tunnels　under　seismic　vibrations.　©　2024　Elsevier　Ltd