Concrete　cover　cracking　induced　by　corrosion　of　steel　reinforcement　is　a　major　influencing　factor　for　durability　and　serviceability　of　reinforced　concrete　structures.　In　order　to　investigate　the　cracking　process　of　concrete　cover　induced　by　rebar　corrosion,　the　heterogeneity　of　concrete　meso-structure　and　non-uniformity　of　rebar　corrosion　are　accounted　for.　The　undamaged　concrete　is　assumed　to　be　a　three-phase　composite　material　composed　of　aggregate,　mortar　matrix　and　the　interfacial　transition　zone　(ITZ).　And　a　concrete　random　aggregate　structure　is　established　for　the　study　on　the　mechanical　behavior　of　the　non-uniform　radial　corrosion　expansion.　In　the　present　simulations,　non-uniform　radial　displacement　is　adopted　to　simulate　the　non-uniform　corrosion　of　the　rebar;　the　plasticity　damaged　model　is　used　to　describe　the　mechanical　behavior　of　the　mortar　matrix　and　the　ITZ,　and　the　aggregate　is　assumed　to　be　elastic.　The　cracking　of　concrete　cover　due　to　the　non-uniform　corrosion　of　the　middle　located　rebar　is　numerically　simulated.　The　comparison　of　the　analysis　and　the　test　result　on　failure　pattern　of　cover　concrete　shows　fairly　good　agreement.　And　then　the　failure　patterns　under　uniform　corrosion　and　non-uniform　corrosion　obtained　from　the　macro-scale　homogeneous　model　and　the　meso-scale　heterogeneous　model　are　compared.　Furthermore,　the　influences　of　concrete　cover　thickness　and　rebar　diameter　on　the　failure　pattern　of　concrete　cover,　the　expansive　pressure　and　the　corrosion　rate　of　the　rebar　when　cover　concrete　cracks　are　investigated.　©,　2015,　China　National　Publications　Import　and　Export　(Group)　Corporation.　All　right　reserved.