In　order　to　investigate　cracking　behavior　of　concrete　cover　induced　by　corner　located　rebar　corrosion　expansion,　a　non-uniform　corrosion　expansion　model　of　corner　located　rebar　was　established.　Concrete　was　regarded　as　a　three-phase　composite　material　composed　of　coarse　aggregate,　mortar　and　the　interfacial　transition　zone(ITZ)　and　a　meso-scale　random　aggregate　model　of　concrete　was　built.　Non-uniform　radial　displacement　was　adopted　in　this　model　to　simulate　corrosion　behavior　of　rebar.　Based　on　the　model,　the　cracking　process　of　concrete　cover　was　explored.　The　simulation　results　show　good　agreement　with　the　available　test　results,　which　verifies　the　reasonability　of　the　present　method.　Moreover,　the　failure　patterns　of　concrete　cover　under　different　corrosion　patterns　of　rebar　obtained　from　the　macro-scale　homogeneous　model　and　meso-scale　heterogeneous　model　were　compared.　Influences　of　concrete　cover　thickness　and　rebar　diameter　on　the　failure　pattern　of　concrete　cover　and　expansive　pressure　were　investigated.　©　2016,　Editorial　Department　of　Journal　of　Building　Materials.　All　right　reserved.