In　view　of　the　difficulty　of　predicting　macroscopic　mechanical　properties　of　concrete　caused　by　material　heterogeneity,size　effect　and　rate　sensitivity,　this　paper　aims　to　establish　a　practical　analysis　model　of　concrete　strength　considering　the　effects　of　material　ratio,structure　size　and　loading　rate.　The　tensile　strength　is　taken　as　the　main　research　object.　Firstly,　the　basic　expression　of　nominal　dynamic　tensile　strength　of　concrete　is　derived　and　established.　Secondly,　based　on　the　mesoscale　numerical　simulation　method　and　size　effect　numerical　tests,　the　determination　methods　for　parameters　B　and　D0　in　the　classical　Type-2　size　effect　model　are　analyzed　and　determined.Furthermore,based　on　the　numerical　test　results,the　effectiveness　of　the　proposed　model　is　verified　from　three　aspects:aggregate　size　effect,structure　size　effect　and　load　strain　rate　effect.Finally,based　on　the　relevant　test　data　of　concrete　dynamic　tensile　strength,the　rationality　of　the　prediction　results　of　the　model　is　further　verified.The　results　show　that:　(1)　Material　parameter　B　decreases　monotonically　with　the　increase　of　interface　strength,　and　material　parameter　D0　increases　first　and　then　decreases　with　the　increase　of　interface　strength;　(2)　When　the　interfacial　strength　is　high,　the　splitting　tensile　strength　of　concrete　increases　with　the　increase　of　the　maximum　aggregate　size,while　when　the　interfacial　strength　is　low,the　splitting　tensile　strength　of　concrete　decreases　with　the　increase　of　the　maximum　aggregate　size.　(3)　The　splitting　tensile　strength　of　concrete　gradually　increases　with　the　increase　of　load　strain　rate,　and　considering　the　inertia　effect,　the　larger　the　structure　size,　the　greater　the　improvement　range;(4)　When　the　load　strain　rate　is　low,the　splitting　tensile　strength　of　concrete　decreases　with　the　increase　of　structure　size,and　when　the　load　strain　rate　is　high,the　splitting　tensile　strength　of　concrete　increases　with　the　increase　of　structure　size.　©　2025　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　rights　reserved.