In this paper the dispersion of generalized Rayleigh wave propagation in non-prestressed half-plane covered with pre-stretched two layers under complete contact conditions is investigated by 3-D linearized theory elasticity. The and are assumed that elastic, homogeneous, isotropic, existed. inter phase zone between upper layer modeled second layer. purpose investigation determination on effect ...

This article demonstrates the design potentials of a recently developed approach for generating smooth poly-hypar surfaces, freeform surfaces made combinations hyperbolic paraboloids (hypars). In surface, double curvature individual hypar modules and connections between them ensure global bending-free structural behaviour. this article, analysis prestressed gridshell as surface is introduced. G...

and findings of laboratory and field tests of a new generation of precast composite piles used for the first time in the construction of the Route 40 highway bridge over the Nottoway River in Virginia. The piles consisted of 24.6 in. (625 mm) diameter concrete-filled glass fiber reinforced polymer (GFRP) circular tubes, with a 0.21 in. (5.3 mm) wall thickness. The composite piles extended above...

Mechanical stresses due to blood flow regulate vascular endothelial cell structure and function and play a key role in arterial physiology and pathology. In particular, the development of atherosclerosis has been shown to correlate with regions of disturbed blood flow where endothelial cells are round and have a randomly organized cytoskeleton. Thus, deciphering the relation between the mechani...

Nuclear shape and size are emerging as mechanistic regulators of genome function. Yet, the coupling between chromatin assembly and various nuclear and cytoplasmic scaffolds is poorly understood. The present work explores the structural organization of a prestressed nucleus in a variety of cellular systems ranging from cells in culture to those in an organism. A combination of laser ablation and...

In order to explore the construction technology of prestressed steel strand–polyurethane cement composites for strengthening hollow slab beams, two reinforced test beams (L1, L2) and one unreinforced beam (L0) were subjected flexural static load tests. The deflection, ductility, stiffness, strain, bearing capacity each used summarize influence different reinforcement techniques on performance b...

This paper presents the results of a parametric study of the flexural behavior of continuous concrete members prestressed with external tendons. The behavior at ultimate limit states is evaluated. A nonlinear analysis model, based on the three dimensional finite element method, ANSYS computer program (10.0) was used. The nonlinear material and geometrical analysis were adopted. The results obta...