Tensile　failure　behavior　of　concrete　dominates　the　behavior　of　concrete　specimens　and　structural　elements.　It　is　strongly　affected　by　loading　rate.　To　study　the　discreteness　and　randomness　of　concrete　static/dynamic　tensile　strength,　the　influence　of　aggregate　spatial　distribution　pattern　was　discussed.　Taking　account　of　the　strain　rate　effect　of　meso-scale　components　under　dynamic　loading,　a　meso-scale　mechanical　model　and　method　were　established,　in　which　the　concrete　was　assumed　to　be　composed　of　aggregate　particles,　mortar　matrix,　and　the　interfacial　transition　zones　between　the　former　two　phases.　Furthermore,　the　uniaxial　dynamic　tensile　mechanical　behavior　of　64　sets　of　concrete　with　different　aggregate　distribution　patterns　was　studied　numerically,　and　the　discreteness　of　concrete　strength　was　analyzed　statistically.　The　results　indicate　that:　the　tensile　strengths　of　concrete　with　different　aggregate　distribution　obey　the　Weibull　distribution;　with　the　increase　of　strain　rate,　the　discreteness　of　the　concrete　tensile　strength　decrease　gradually.　©　2016,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.