The　bonding　of　thin　fiber-reinforced　plastics　(FRP)　composites　on　the　surface　of　concrete　members　has　emerged　as　an　effective　method　to　increase　both　the　strength　and　stiffness　of　concrete　members.　Although　a　large　volume　of　experimental　and　numerical　research　has　performed　on　existing　concrete　structures　to　increase　their　load　carrying　capacity,　there　appears　to　be　less　work　reported　on　simulating　the　influence　of　temperature　on　the　behavior　of　concrete　structures.　This　study　intends　to　examine　the　effects　of　changing　temperature　on　the　mechanical　properties　of　FRP　composites　as　well　as　deteriorated　composites　on　the　structural　performance　of　FRP　bonded　concrete　structures.　The　overall　approach　consists　of　computations　using　finite　element　models　to　simulate　the　structural　behavior　of　FRP　bonded　beams　and　columns.　Three-dimensional-extended　finite　element　modeling　X-FEM　using　ABAQUS-CAE　v.6.13　program　was　performed　to　explore　the　influence　of　temperature　of　(25　°C,　100　°C　and　180　°C)　on　failure　loads　of　FRP　strengthened　beams　and　columns　with　adhesive　material.　Additionally,　the　cohesive　traction-separation　damage　model　was　use　to　model　the　delamination　of　FRP　from　the　concrete.　The　flexural　strength,　mid-span　deflection,　crack　patterns,　failure　loads,　and　mode　of　failure　for　the　tested　models　were　compared　with　the　previous　experimental　study.　The　results　show　that　a　FEM　results　were　in　good　agreement　with　experimental　results.　The　flexural　strength　decreases　with　temperature　rise　for　FRP　strengthened　concrete　beams.　The　high　temperature　180　°C　has　an　adverse　influence　on　the　compressive　strength　of　the　specimens.　The　way　of　FRP　rupture　in　the　simulation　was　similar　to　the　mode　that　was　observed　during　the　experimental　tests.　©　2020　by　the　authors.