the aim of this study was to evaluate sound and decayed wood of iranianbeech (fagus orientalis) with a nondestructive stress wave method. wood samples,with dimensions of 9 by 19 by 200 mm were decayed in laboratory soil-bed tests,based on european pre-standard env-807. the decay was evaluated by measuringbending dynamic modulus of elasticity (moed) and longitudinal dynamicmodulus of elasticity ...

Soil and water conservation measures can impact hydrological cycle, but quantitative analysis of this impact is still difficult in a watershed scale. To assess the effect quantitatively, a three-dimensional finite-difference groundwater flow model (MODFLOW) with a surface runoff model-the Soil Conservation Service (SCS) were calibrated and applied based on the artificial rainfall experiments. T...

Shear wave velocity (Vs) is known as one of the fundamental material parameters which is useful in dynamic analysis. It is especially used to determine the dynamic shear modulus of the soil layers. Nowadays, several empirical equations have been presented to estimate the shear wave velocity based on the results from Standard Penetration Test (SPT) and soil type. Most of these equations result i...

The modulus of elasticity represents the soil stiffness; it was used to design and analyze foundation, slope stability, retaining structure, etc. It is one main input parameters in finite element method for analyzing behavior. scope this study evaluate correlation between (E) cohesion (c u ) remolded undisturbed samples clayey so can assess effect lateral confining pressure on elasticity. uncon...

Abstract. Due to age, structural deterioration, and other factors, concrete constructions such as beams columns will inevitably deteriorate. The growth of nanomaterials recent advances in multidisciplinary research has broadened cement composites' applicability various fields. A self-sensing composite can detect its own deformation, strain, stress by changing electrical characteristics, which m...

Fracture grouting is widely used for building foundation reinforcement, however the underpinning mechanisms are still not clear. Using numerical results about a single-hole fracture process as basis, model composed of soil and veins has been created to analyze reinforcement mechanism. The influence weights vein skeleton compaction effect have studied, thereby obtaining relevant information on c...