Surface　ruptures　resulting　from　seismic　faulting　have　the　potential　to　inflict　substantial　damage　to　bridges　straddling　fault　lines;　hence,　it　is　imperative　to　investigate　the　impact　of　ground　motions　documented　on　either　side　of　fault　rupture　planes-termed　as　across-fault　ground　motion-on　the　seismic　resilience　of　bridges.　In　this　paper,　the　object　of　study　is　a　three-span,　simply　supported　beam　bridge　traversing　a　strike-slip　fault.　Utilizing　the　LS-DYNA　finite　element　software　platform,　a　sophisticated　three-dimensional　finite　element　model　of　the　selected　bridge　is　constructed,　meticulously　accounting　for　material　damage　nonlinearity　and　structural　collision　contact　nonlinearity.　A　synthetic　across-fault　ground　motion　serves　as　the　excitation　for　the　seismic　analysis　of　the　bridge,　systematically　examining　the　influence　of　the　fault-crossing　angle　(FCA),　fault　sliding　rise　time,　and　ground　surface　permanent　rupture　displacement　on　the　dynamic　response　and　seismic　damage　incurred　by　the　simply　supported　beam　bridge.　The　findings　demonstrate　that　a　diminutive　fault-crossing　angle　(FCA)　corresponds　to　an　elevated　risk　of　longitudinal　beam　collapse　when　a　simply　supported　beam　bridge　does　not　intersect　a　fault　vertically.　The　impact　of　the　fault　sliding　rise　time　on　the　magnitude　of　seismic　response　and　damage　sustained　by　the　simply　supported　beam　bridge　is　relatively　minuscule　and　can　be　neglected.　Conversely,　the　ground　surface　permanent　rupture　displacement　profoundly　influences　the　dynamic　response　and　seismic　damage　of　the　bridge.　The　emergence　of　fling-step　pulses　from　the　development　of　ground　surface　permanent　rupture　displacement　amidst　seismic　activity　induces　a　shift　in　failure　mode-from　the　designer-intended　bending　failure　to　an　unforeseen　shear　failure.