| Recently people of all over the world anxious for peace and harmony, but the terroristattacks and accidental explosion brought a huge threat to the social development and people’slife. The awareness regarding the potential devastating damage to civil infrastructure due toexplosive loading has been heightened.Masonry walls are widely used as a bearing member or partition walls in buildingstructures. Because the production of original clay brick caused the destruction of large tractsof forest in China, a new type of wall materials-concrete hollow block has been developed.Many studies of masonry material properties and masonry structure behaviors under staticloads have been reported in the literature. However, there are few studies of the dynamicresponse of the concrete block wall under blast loading.In this paper, the dynamic response of the concrete masonry wall under blast loading areinvestigated based on the commercial software ANSYS/LS-DYNA. The main researchcontents are as follows:（1） Previous researches on dynamic material properties for concrete masonry and thedynamic response of the wall were introduced and summarized.（2） The estimate of blast loads was introduced in this paper. The pressure-timehistory was simplified as a triangular curve. Then the design measures to resist blasting weresummarized based on the literatures.（3）Numerical simulations are conducted to estimate the structural response of concretemasonry walls subjected to blast loading based on the explicit finite element program ANSYS/LS-DYNA. Two common approaches developed in the literature, i.e., the discrete model andcontinuous model have been used in this paper. The contact surface between the block andmortar was considered in the discrete model. The numerical results were compared with thetest data and good agreements can be observed. Parameter studies have been carried out toinvestigate the effect of wall thickness, mortar strength, reinforcement ratio, bearingconstraints, peak pressure on the dynamic response. |
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