Meso-concrete modeling based on laser scanning technology

Abstract

<p indent="0mm">This contribution focuses on the construction of a 3D or 2D mesoscopic concrete model using laser scanning technology and the state dot-matrix method of aggregate placement. First, a 3D laser scanner was used to collect geometry information from real aggregates to create an aggregate library. The aggregates were then randomly selected from the aggregate library and placed according to the Fuller grading curve in order of reduction to produce a 3D mesoscopic concrete model. By cutting the 3D geometry model, a simplified two-dimensional plane geometry model was obtained. One of the benefits of laser scanning technology is that it ensures the realistic morphology of various aggregates while ensuring that the aggregate library perfectly meets the fundamental requirement for the construction of mesoscopic concrete models. Furthermore, the current aggregate placement algorithm allows for the efficient and rapid establishment of a concrete geometry model with microstructure. Finally, combined with the laboratory experiments of concrete, the influence of aggregate distribution on the failure mechanism of concrete was studied by the finite element method with the cohesive zone model under uniaxial compressions.