Dynamic response of reinforced concrete sheds against the impact of rock block with different shapes and angles

Abstract

This study aimed to quantitatively identify the influence of the block impact angle and block shape on the impact effect of reinforced concrete RC sheds. The smooth particle hydrodynamic (SPH) method and finite element method (FEM) were coupled and used to solve the simulation difficulty of large deformation of the sand buffer layer. The accuracy of the coupled model was verified by the full-scale test data. Finally, the impact forces and the dynamic responses of the RC shed were analysed, focusing on the effects of the block impact angle and shape. The numerical results show that the coupled SPH-FEM method is effective for simulating how block impacts the RC shed. The block impact angle and shape can significantly influence the normal and tangential impact forces. The design of the RC shed based on the assumption of blocks as free-falling spherical projectiles can lead to inaccuracy in some impact scenarios.

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

“…The steel column, main girder, secondary beam, and steel roof slab adopted shell elements with the complete integration of three/four nodes, and the mesh size is 0.05 m. The EPS and impactor adopted solid elements with the complete integration of six nodes, and the mesh sizes are 0.06 m and 0.04 m, respectively. Due to the direct impact of the impactor, the sand cushion will experience a large deformation, which can easily cause mesh distortion and lead to the instability of the calculation [20,27]. Therefore, SPH simulation is adopted for sand, and the spacing between the adjacent SPH particles is about 0.05 m. three/four nodes, and the mesh size is 0.05 m. The EPS and impactor adopted soli ments with the complete integration of six nodes, and the mesh sizes are 0.06 m an m, respectively.…”

“…Therefore, SPH simulation is adopted for sand, and the spacing between the adjacent SPH particles is about 0.05 m. three/four nodes, and the mesh size is 0.05 m. The EPS and impactor adopted soli ments with the complete integration of six nodes, and the mesh sizes are 0.06 m an m, respectively. Due to the direct impact of the impactor, the sand cushion will expe a large deformation, which can easily cause mesh distortion and lead to the instabi the calculation [20,27]. Therefore, SPH simulation is adopted for sand, and the sp between the adjacent SPH particles is about 0.05 m.…”

“…Shen investigated the various rock shape's effects on the response of block impacts against a buffer layer [19]. However, it is difficult to calibrate particle material parameters with DEM [20]. Moreover, the soil layer consists of an enormous number of fine particles, and the computer operation efficiency will be reduced.…”

“…Smoothed particle hydrodynamics (SPH) is a convenient way to describe the particle physics features and capture the sup-large deformation of the soil layer [20,21]. For the finite element simulation of the steel column, steel beam, and steel slab, its algorithm is mature, which can ensure sufficient accuracy.…”

“…For the finite element simulation of the steel column, steel beam, and steel slab, its algorithm is mature, which can ensure sufficient accuracy. The coupled FEM-SPH approach can combine the advantages of SPH for simulating the sup-large deformation of soil and FEM for solving structural dynamics [20,22].…”