In　order　to　describe　the　mechanical　properties　of　concrete　under　high　temperature,　a　thermo-mechanical　model　for　concrete　with　the　influence　of　temperature　was　presented　in　this　paper.　It　based　on　thermodynamic　theory　and　combined　the　damage　theory　with　the　classic　elasto-plastic　theory,　which　was　used　to　describe　the　mechanical　properties　of　concrete　under　high　temperature.　Firstly,　the　elastic　strain　increment　under　elevated　temperature　was　derived　on　the　basis　of　the　rmodynamic　principle.　Then,　a　hardening　parameter　based　on　the　classical　plastic　theory　was　constructed,　with　consideration　of　the　influence　of　temperature.　A　plastic　strain　increment　expression　was　obtained.　With　superposition　of　the　two　part　strain　increment,　the　expression　of　thermal-mechanical　coupling　constitutive　model　was　established.　The　model　was　calibrated　with　the　experimental　results.　It　proves　that　the　thermal-mechanical　coupling　constitutive　model　can　more　accurately　describe　the　mechanical　properties　of　concrete　under　high　temperature.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.