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Numerical analysis of shear forces response in the ends of the blast-loaded arches

ZHU Kun-fen,FANG Qin,ZHANG Ya-dong(Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China)  
Finite element method was used to study linear and nonlinear response of shear forces in the end of the arches subjected to nuclear and nonnuclear explosion loads in order to well design against the shear failure of the engineering structures. The influence of the ratio of the thickness to the span(h/L),duration of the loads,boundary conditions and plastic deformation were analyzed.It is demonstrated that h/L has significant influence on the dynamic shear and the plastic deformation only has remarkable influence on the first negative peak value or the second positive peak value of the dynamic shear in the end of the arches.Therefore,the first positive peak value is the key parameter for structural design.
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