In emergency scenarios, immediate reconnaissance efforts are necessary. These efforts often take months to complete in full. While underway, building occupants are unable to return to their homes/businesses, and thus, the impact on the society of the disaster-stricken region is increased. In order to mitigate the impact, researchers have focused on creating a more efficient means of assessing t...

Single crystals of aspirin form I were cleaved and indented on their dominant face. Upon inspection, it was possible to observe strongly anisotropic shallow lateral cracks due the extreme low su...

Our study deals with the quantification of the energy dissipated by a defect of spalling on the outside ring of a rolling bearing. A previous work showed a correlation between the thermal heating and the vibratory level generated by the progressive appearance of the defect. First, we propose a numerical model of the heat transfers In a second time, we developed an experimental setup. The result...

In this paper, we study a non-linear numerical scheme arising from the implicit time discretization of the Bažant-Thonguthai model for hygro-thermal behavior of concrete at high temperatures. Existence of the time-discrete solution in two dimensions is established using the theory of pseudomonotone operators in Banach spaces. Next, the spatial discretization is accomplished by the conforming fi...

Ultra-high-performance concrete (UHPC) is a material that has high compactness, low porosity, and mechanical strength, with especially tensile strength. Due to these characteristics, the behavior of when exposed temperatures debatable. The amount fibers in mixture, which makes UHPC present seen as one arguments for good performance temperatures. objective this study was evaluate behaviors ultra...

Abstract The size effect has its origin in fracture mechanics and describes the formation as well propagation of cracks brittle solid materials dependence specimen size. However, concrete spalling damage behaviour on a macroscopic scale for different sized specimens case fire. Concrete is very complex yet not fully understood phenomenon. To reduce effort fire tests to analyse mixtures, this stu...

Coal wall rib-spalling is regarded as a key technical problem influencing safe and efficient mining of fully mechanized working face with great height (FGH) while the coal stability influenced by strength body, which internal joint fissures have crucial impact on body. This research attempted to explore how FGH occurrence fissures. paper uses physical numerical simulations systematically analyz...

Post-earthquake observations and laboratory tests reveal the needs for innovative solutions that can enhance concrete compression ductility in boundary elements of special structural walls. This study proposes a new element design by utilizing hybrid fiber reinforced (HyFRC). One full-scale HyFRC is tested uniaxial compared to three conventional are compliant with ACI-318 codes. Results demonst...