This　paper　establishes　a　mathematical　model　to　analyze　the　static　and　dynamic　behaviors　of　functionally　graded　graphene　reinforced　composite　(FG-GRC)　beam　with　geometric　imperfection　subjected　to　thermo-electro-mechanical　load.　Three　different　geometric　imperfections　are　considered.　Four　different　distribution　patterns　of　graphene　nanoplatelets　(GPLs)　are　taken　into　consideration.　The　effective　properties　of　the　geometrically　imperfect　FG-GRC　beam　are　estimated　by　the　modified　Halpin-Tsai　model　and　rule　of　mixture.　The　nonlinear　partial　differential　governing　equations　are　deduced　based　on　first　-order　shear　deformation　theory,　von　Karman　nonlinear　displacement-strain　relationship　and　Hamilton　principle,　and　discretized　as　ordinary　differential　forms　through　the　differential　quadrature　(DQ)　method.　Newmark-beta　method　and　iteration　method　are　employed　to　numerically　solve　the　governing　equations.　The　effects　of　geometric　imperfection,　GPLs　and　piezoelectric　actuators　on　bending　and　vibration　of　the　geometrically　imperfect　FG-GRC　beam　subjected　to　thermo-electro-mechanical　load　are　comprehensively　investigated.　The　results　clearly　demonstrate　that　the　coupling　effect　of　geometric　imperfections　and　thermo-electric-mechanical　loads　can　introduce　an　additional　transverse　load　acting　along　the　length　of　the　geometrically　imperfect　FG-GRC　beam,　and　hence　makes　a　significant　difference　on　its　static　and　dynamic　behaviors.　(C)　2022　Elsevier　Masson　SAS.　All　rights　reserved.