Xiuli Du

TL;DR: In this article, the effects of loading rate and heterogeneity of meso-/micro-structure on the failure pattern and the macroscopic mechanical properties of concrete are investigated.

TL;DR: In this article, a meso-scopic numerical model based on the finite-element method is developed for the simulation of chloride diffusivity in concrete infrastructures considering concrete heterogeneity, and the diffusion properties of the mortar matrix are determined based on water/cement ratio, degree of hydration and porosity gradients away from aggregate particles.

TL;DR: Based on the meso-mechanical analysis model of concrete material, a mesoscale numerical approach was developed for the simulation of failure behavior and nonlinear mechanical properties of reinforc... as discussed by the authors.

TL;DR: In this article, the effect of porosity on the effective bulk and shear moduli of saturated concrete is studied in a quantitative manner based on the assumption that the pore-water has no shear capacity, the effective elastic modulus and Poisson's ratio of the saturated concrete are obtained using the theory of elasticity subsequently Furthermore, according to the maximum tensile stress failure criterion, the quantitative relationships between the porosity and the global tensile strengths as well as their corresponding tensile peak strains of concrete in dry and saturated states are established.

TL;DR: In this article, a meso-element equivalent method is proposed to investigate the macro mechanical properties of concrete, where randomly distributed aggregates with different sizes and shapes are built by using the Monte Carlo simulation approach, and they are discretized into a finite number of identical elements with a characteristic element size.