Distribution Rule of Blast Loads on Large-span Compound Structure

In order to analyze the distribution of the load on the large-span compound structure in rock and soil under explosion, by applying LS-DYNA program to simulate different operation conditions, the variety and the distribution of the load is gotten on some typical span arch shell structures. The result shows that the load on the arch shell structures attenuates from vault to two sides as time goes by; the load's acceptance range minishes as the structure span increases until it reaches 50m, the distribution of the load offsets as deflection angle of the explosion source to the structures changes with the same distribution form.