To　study　the　influence　of　member　initial　imperfections　on　seismic　response　of　single-layer　Kewitt　latticed　domes,　a　multiple　beam　elements　method　was　used　to　model　the　member　initial　imperfections　with　OpenSEES.　Appropriate　parameters　for　the　multiple　beam　elements　method　in　modeling　the　hysteresis　of　circular　pipes　in　spatial　grid　structures　were　presented,　and　equations　describing　the　relationship　between　equivalent　eccentric　ratio　and　normalized　slenderness　ratio　were　derived　by　fitting　the　stability　coefficients　in　GB　50017-2003.　In　consideration　of　stochastic　distribution　of　initial　member　bending　directions,　single-layer　Kewitt　latticed　dome　models　with　different　parameters　were　created,　and　the　maximum　displacements　obtained　from　incremental　dynamic　analyses　were　compared.　The　results　show　that　the　influence　of　member　initial　imperfections　on　the　seismic　response　can　be　neglected　when　the　domes　are　in　the　elastic　stage,　whereas　the　influence　cannot　be　neglected　when　the　domes　are　in　the　inelastic　stage.　The　dispersion　level　of　the　maximum　displacements　of　the　domes　with　different　member　bending　directions　basically　increases　with　an　increase　of　seismic　intensity.　The　difference　of　response　between　the　domes　incorporating　both　structural　and　member　geometric　imperfections　and　those　only　consider　member　imperfections　can　be　significant,　and　uncertainties　exist　in　the　prediction　of　the　maximum　displacement　of　the　domes　with　the　two　cases　of　imperfection.　The　key　influential　factor　is　related　to　the　dispersion　level　of　the　distribution　of　yielded　members　under　earthquakes.　©　2018,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.