In　order　to　analyze　the　force　behaviour　of　reinforced　concrete　frames　under　actual　fire　conditions,　the　gas　temperature　around　the　members　was　accurately　calculated　using　FDS　fire　dynamics　software　to　simulate　a　typical　fire　scenario.　Subsequently,　both　the　fire-affected　and　non-fire-affected　frames　were　modeled　using　ABAQUS　finite　element　analysis　software　with　a　multi-scale　modelling　approach.　The　method　employs　solid　elements　to　simulate　the　framework　under　fire　influence　and　beam　elements　to　simulate　the　framework　under　non-fire　conditions,　achieving　a　higher　precision　in　reflecting　post-fire　structural　deformations　and　stress　conditions　while　also　considering　computational　efficiency.　The　calculation　of　fire　resistance　is　focused　on　a　single-layer　reinforced　concrete　frame　structure,　enabling　an　analysis　of　beam　and　column　component　deformations　as　well　as　changes　in　internal　forces　under　typical　fire　scenarios.　This　methodology　provides　engineering　professionals　with　an　effective　tool　for　analyzing　overall　structural　fire　resistance　in　concrete　frames.　Through　comprehensive　utilization　of　these　specialized　software　programs,　more　accurate　evaluations　can　be　made　regarding　a　frame＇s　performance　during　fires,　thereby　offering　important　technical　support　and　references　for　engineering　practice.　©　2024