Based　on　the　base　force　element　method　(BFEM),　the　dynamic　mechanical　behavior　of　concrete　under　uniaxial　compression　loading　at　different　strain　rates　is　investigated.　The　concrete　can　be　considered　as　a　three-phase　composite　material　composed　of　aggregate,　cement　mortar,　and　interfacial　transition　zone　(ITZ)　on　the　meso-level.　A　two-dimensional　random　aggregate　model　is　generated　by　the　Monte　Carlo　method.　A　multi-linear　two-dimensional　damage　model　is　applied　to　describe　the　damage　properties　of　each　phase　in　the　concrete.　The　strain-softening　behavior,　strain-rate　effect,　and　failure　patterns　of　the　concrete　are　studied.　The　numerical　results　find　that　the　peaks　of　compressive　stress　and　compressive　strain　of　concrete　show　the　rate-sensitivity　in　various　degrees　under　different　strain　rates.　The　calculated　results　of　the　dynamic　enhancement　factors　are　in　a　good　agreement　with　the　formula　given　by　the　Comite　Euro-International　du　Beton　(CEB)　and　other　experimental　results.　The　failure　diagram　of　the　specimen　clearly　describes　the　compressive　failure　process　of　the　concrete　specimen.　This　failure＇s　characteristics　are　similar　to　the　experimental　results.