Numerical study for impact resistant design of full scale arch type reinforced concrete structures under falling weight impact test

Abstract

In this paper, a falling-weight impact test using full scale arch type reinforced concrete (RC) structures was conducted to verify a proposed impact response analysis method. The applicability of the numerical analysis method was confirmed by comparison with the experimental results. The validity of the current impact resistant design procedure to the performance based design procedure was investigated using the proposed numerical analysis method. From this study, it is confirmed that by applying the current impact resistant design procedure, a performance based impact resistant design with a sufficient safety margin may be obtained for the full scale arch type RC structures.

Buffer Capacity of Steel Shed with Two Layer Absorbing System against the Impact of Rockfall Based on Coupled SPH-FEM Method

“…where σsand is the stress and ԑsand is the volumetric strain. LS-DYNA material m MAT_CRUSHABLE_FOAM is used, which has a good simulation effect [1,20]. EPS.…”

“…Figure 6a shows the constitutive model for the sand. The stress-strain relationship is described in the following expression [1]:…”

“…where σ sand is the stress and ε sand is the volumetric strain. LS-DYNA material model MAT_CRUSHABLE_FOAM is used, which has a good simulation effect [1,20]. 6b, under a uniaxial compression test, the EPS material will experience three stages: the linear elasticity stage, the yield stage characterized by platform stress, and the compaction stage where stress rapidly increases with strain [29].…”

“…Rockfall hazards are natural disasters in mountainous areas. It poses a serious threat to engineering structures such as highways, railways, bridges, buildings, etc., and the huge impact force of falling rocks will destroy these structures [1,2]. There are mainly two protective structures used to reduce this hazard: passive ones and active ones.…”

“…Calvetti et al conducted a series of physical experiments to study the shock absorption effects of soil stratum, including the effect of various parameters such as falling height, block mass, and cushion thickness [11]. Bhatti et al performed a real-scale experiment of rockfall impacting a reinforced concrete shed to study the dynamic responses [1]. Wu et al developed a physical experiment of rockfall impacting a steel rock shed with a two-layered absorbing system [12].…”