This　paper　proposes　a　novel　stainless-steel　tube　locally　strengthened　by　a　concrete-filled　steel　tube　to　resist　impact　loads.　A　drop　hammer　impact　test　system　was　used　to　determine　the　failure　modes,　impact　forces,　and　displacement　responses　of　the　strengthened　tubes　under　an　impact　load.　The　effects　of　the　strengthening　length　and　thickness　of　the　concrete　and　outer　steel　tubes　on　the　impact　responses　of　the　strengthened　tubes　were　investigated.　The　impact　resistance　was　found　to　improve　with　an　increase　in　the　thickness　of　the　concrete　and　outer　steel　thickness.　The　test　results　also　indicated　that　the　strengthened　tubes　exhibited　a　flexural　failure　mode　with　a　combination　of　local　and　global　deformations.　An　analytical　model　for　predicting　the　dynamic　responses　of　the　locally　strengthened　tubes　was　established　based　on　an　equivalent　two-degree-of-freedom　(TDOF)　model.　The　analytically　predicted　results　were　compared　with　the　experimental　results,　and　the　good　consistency　between　these　two　results　demonstrated　the　accuracy　of　the　established　analytical　model.　©　2024　Elsevier　Ltd