Self-piercing　riveted　(SPR)　connections　are　gradually　being　used　in　cold-formed　steel　structures　due　to　higher　tensile　strength,　shear　strength　and　connection　efficiency　compared　to　those　of　self-　drilling　connections.　With　the　purpose　of　investigating　the　flexural　behavior　of　truss　beams　with　SPR　connections　and　studying　the　effects　of　height　and　span,　as　well　as　diagonal　web　arrangement,　on　their　flexural　stiffness　and　ultimate　bearing　capacity,　the　symmetric　vertical　static　load　test　was　conducted　for　5　cold-formed　thin-walled　truss　beam　specimens　with　SPR　connections.　The　finite　element　software　was　adopted　to　simulate　the　test　models,　and　the　more　parameters　were　additionally　analyzed.　The　research　indicated　that　the　failure　modes　of　the　specimens　can　be　divided　into　two　types:　the　local　strength　failure　mode　occurred　when　the　upper　chord　flange　plate　was　cracked,　the　other　one　occurred　when　the　rivets　at　joints　of　truss　beams　were　stripped　from　the　plate.　The　span-height　ratio,　spacing　of　web　members,　chord　thickness　and　number　of　rivets　had　great　influence　on　the　flexural　stiffness　and　ultimate　bearing　capacity　of　truss　beams　with　SPR　connections,　while　the　thickness　of　web　members　and　the　arrangement　of　diagonal　web　members　had　less　influence.　The　truss　beam　was　a　simply　supported　beam　with　a　weak　web.　A　theoretical　formula　was　proposed　to　calculate　the　equivalent　flexural　stiffness　of　the　truss　beam　with　SPR　connections　based　on　parametric　analysis,　and　it　agreed　with　the　experiment　results,　so　the　proposed　theoretical　formula　is　valid　and　can　be　applied　to　practical　engineering.　Keywords:　Self-piercing　riveted　connection　Cold-formed　steel　truss　beam　Static　load　test　Numerical　analysis　Flexural　behavior　(C)　2019　Published　by　Elsevier　Ltd.