Concrete　structures　are　subjected　to　various　loadings　during　their　service　life　and　their　internal　structures　will　be　changed,　resulting　variations　in　mechanical　and　thermo-physical　properties.　To　investigate　the　effect　of　mechanical　stress　on　thermal　conduction,　a　computational　homogenization　method　from　a　mesoscopic　perspective　was　proposed　in　the　present　work.　In　the　simulations,　concrete　was　considered　as　a　three-phase　composite　material　consisting　of　aggregate,　mortar　matrix　and　the　interfacial　transition　zones　(ITZs)　between　them.　The　mechanical　analysis　was　conducted　firstly　to　study　the　damage　distribution　within　concrete.　The　outcomes　of　mechanical　computation　were　then　used　as　the　initial　input　data　in　the　thermal　conduction　computation.　The　equivalent　thermal　conductivity　of　damaged　element　was　homogenized　by　a　composite　mechanical　method　based　on　damage　and　the　initial　thermal　conductivity　of　sound　material.　Accordingly,　a　meso-scale　model　in　which　the　mechanical　and　thermal　behavior　were　one-way　coupled　was　built.　The　method　was　calibrated　by　comparing　the　numerical　results　with　the　available　experimentally　measured　ones.　Based　on　the　verified　simulation　method,　effective　thermal　conductivity　(ETC)　and　temperature　field　of　concrete　subjected　to　different　loading　levels　were　calculated.　Besides,　the　effects　of　loading　type　(compressive　and　tensile　loadings)　on　ETC　and　temperature　field　of　concrete　were　studied.　It　is　found　that　ETC　of　concrete　decreases　with　an　increasing　loading　level.　In　addition,　the　effect　of　tensile　loading　on　thermal　behavior　depends　on　whether　the　direction　of　thermal　conduction　is　parallel　or　perpendicular　to　loadings.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.