5. Conclusions (1)The concrete bridges will be damaged seriously by the synergetic effect of blast wave and fragment. (2)The synergetic effect to damage the bridge embodied in two ways: impact on the global bridge and destroy the local beam, which will decrease the loading capacity of the bridge. (3)The acceleration changed seriously under the synergetic effect which should be taken into account in antiknock design. Reference [1] Guowei Zhang. Terminal Effect and Application Technology[M].Beijing: National Defence Industry Press, 2006. [2] Holmquist T.J, Johnson G.R, Cook W.H.A computational constitutive model for concrete subjected to large strains,high strain rates and high pressures[J].14th International Symposium on Ballistics,1995,12(2):591-600. [3] GR Johnson, W.C., A Constitutive Model and Data for Metals Subjected to Large strains,High Strain Rates and High Temperature, in Proceedings of the seventh international symposium on ballistics. 1983: Netherland.p.541-547. [4] Century Dynamics AUTODYN Theory Manual, Revision 6.1[M]. California: San Ramon, 2006:25-87.
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