The　stress-strain　relationship　of　recycled　coarse　aggregate　concrete　is　the　bridge　to　realize　its　mechanical　analysis　from　material　level　to　structural　level,　and　becomes　the　cornerstone　of　the　basic　theory　of　recycled　coarse　aggregate　concrete　structure.　The　research　progress　made　by　the　author＇s　group　in　the　stress-strain　relationship　of　recycled　coarse　aggregate　concrete　over　the　years　was　introduced.　The　influence　of　complex　interfacial　transition　zones　on　the　failure　behavior　of　recycled　coarse　aggregate　concrete　was　investigated　by　using　the　method　of　modeling　recycled　coarse　aggregate,　and　the　microscopic　damage　and　evolutionary　mechanism　of　recycled　coarse　aggregate　concrete　were　revealed.　From　static　to　dynamic　loading,　the　experimental　studies　of　stress-strain　behaviors　of　recycled　coarse　aggregate　concrete　were　carried　out　systematically　under　different　working　conditions,　the　influence　of　loading　conditions　on　the　internal　stress　and　deformation　of　recycled　coarse　aggregate　concrete　was　investigated,　and　the　corresponding　mechanical　and　mathematical　models　were　established.　Furthermore,　considering　the　temporal　and　spatial　variability　of　the　performance　of　recycled　coarse　aggregates,　the　probabilistic　distribution　characteristics　of　the　mechanical　response　of　recycled　coarse　aggregate　concrete　were　found,　and　the　stochastic　damage　constitutive　relationship　of　recycled　coarse　aggregate　concrete　was　proposed.　Based　on　the　obtained　constitutive　model,　the　time-dependent　reliability　analysis　and　dynamic　nonlinear　analysis　of　recycled　coarse　aggregate　concrete　components　and　structures　were　carried　out,　providing　theoretical　support　for　the　safe　application　of　recycled　coarse　aggregate　concrete　in　practical　engineering.　Relevant　conclusions　were　extracted　and　future　research　work　was　prospected.　©　2024　Tsinghua　University.　All　rights　reserved.