Abstract During track construction or ballast bed maintenance, layer compaction quality plays an essential role in the following irregularity accumulation, its lifecycle, and maintenance costs. The process is characterized by accumulation of stressed state. elastic wave propagation methods are effective way for identification properties. paper presents theoretical experimental studies consolida...

In Anatomy of a Hospital, Ashley (1987) makes an intriguing figurative diagnosis of the hospital organizational life. So it is this hospital culture, supported by many figures, but still intriguing in its essence, and posing threats to whoever would attempt to approach it in an orderly managerial manner. To speak about innovation in a system which is financially burdened, on the one hand, and s...

Abstract: the article provides a calculation justification of proposed railway structure on reinforced concrete sleeper-free base, for which an analysis existing methodology calculating track strength is carried out, according to dynamic loads acting from rolling stock are determined. The applied sleeper-less structures and results measurements emerging stresses in substructure, measured depth ...

In the present work, static and dynamic shear strength of concrete is investigated by means Punch-Through Shear (PTS) tests. This experimental method consists in applying an axial load to central part specimen which generates stresses ligament sample. Prior shearing stage, sample subjected a lateral confinement pressure that applied pre-stressing metallic cell then inserting in-between jaws so ...

Stress is one of the most important physical indexes reflecting mechanical behavior concrete structures. In general, stress in structures cannot be directly monitored and can only estimated through an established model strain. The accuracy depends on rationality for As strain measured by sensors contains creep, shrinkage, elastic strain, it difficult to establish analytical stress. this paper, ...

Abstract Fiber reinforced concrete (FRC) is being widely used as the structural material owing to its superior engineering properties. From past, it was understood that Reinforced Concrete had been proved be well performing over time under different practical situations. Fibers enhance mechanical properties of and in turn change structbehaviouravior. It observed high strength fibers are availab...