23 research outputs found
Elevated tank due to earthquake even
Elevated reservoirs are mainly used for storing of variety water. During earthquake activity the
fluid exerts impulsive and convective (sloshing) effects on the walls and bottom of tank. This paper
provides theoretical background for analytical calculating of elevated water tank due to earthquake
even and deals with simplified seismic design procedures for elevated tanks
Fluid in rectangular tank – frequency analysis
Ground-supported tanks are used to store a variety of liquids. During earthquake activity the
liquid exerts impulsive and convective pressures (sloshing) on the walls and bottom of the rectangular
tank. This paper provides theoretical background for analytical calculating of circular frequencies and
hydrodynamic pressures developed during an earthquake in rectangular container. Analytical results
of first natural frequency are compared with experimen
Seismic response of liquid storage ground supported tanks for different slenderness ratio
Ground-supported cylindrical tanks are used to store a variety of liquids. This paper provides
the theoretical background for takes into account impulsive and convective (sloshing) actions of the
fluid in concrete containers fixed to rigid foundations; it has been adopted in Eurocode 8. Seismic
responses – base shears, the bending and overturning moments – are calculated by using the response spectra of the earthquake in Loma Prieta, California (18.10.1989). As the examples is analyzed the ground supported cylindrical concrete tanks, fluid filling is H = 2 m and R are depended from tank slenderness ratio = H/R. For considered tank slenderness ratios = 0.3, 0.5, 0.7, 1, 2, 3 R are given 6.667 m, 4 m, 2.857 m, 2 m, 1 m and 0.667 m
FEM simulation of the endlessly long fluid filled canal due to horizontal ground motion
The dynamic behavior of fluid filling in moving containers is a phenomenon that has attracted the attention lot of scientists. The liquid in an arbitrary shaped container under external excitations exerts the hydrodynamic pressure that with hydrostatic pressure acting together onto walls and bottom of container. The knowledge of the hydrodynamic fluid response on the solid domain of structure contributes to reliability and earthquake resistance of liquid-containing systems. This paper presents the possibility of simulation endlessly long fluid filled the rectangular tank – channel due to an action of horizontal ground motion. The Finite Element Method was used for simulation of this problem. One computational model uses FEM formulation ALE FSI and two models simulate only the solid domain by FEM and fluid effect due to horizontal ground motion is simulated by fluid-quasistatic hydrodynamic pressure given by Eurocode 8 and Indian standard
Fluid - Structure - Soil Interaction of Cylindrical Liquid Storage Tank Subjected to Horizontal Earthquake Loading
Shallow founded tanks are strategic structures
used to store a variety of kind of liquids. The fluid
develops hydrodynamic effect on solid domain of
container during an earthquake. This paper provides the
theoretical background for numerical model on seismic
response of fluid-structure-soil interaction. The Finite
Element Method (FEM) was used for seismic response of
shallow founded cylindrical container. The Fluid-
Structure-Soil interaction of shallow founded tank was
analysed according to theories of I. Limit States - the
ultimate limit state (ULS) and II. Limit States - the
serviceability limit state (SLS) pursuant to EN 1997-1.
Summary of the results: the maximum rotation of
foundation is growing with the reduction of the stiffness
of the subsoil and the vertical and horizontal bearing
capacity depends on the strength properties of the
subsoil
Study of factors influencing vibro- isolating properties of materials for passive elastic bearing of machines
Machinery or instruments are subjected to external forces from a base in many cases. It can have a negative influence on manufacturing accuracy, tightness, wear of machine parts, work safety etc. Therefore, it is necessary to perform suitable passive elastic bearings of machinery to eliminate external vibration from the base. An application of suitable vibro-isolating materials is one way of the vibration elimination. The aim of the paper is to study vibration damping properties of different materials by means of a non-destructive method of forced mechanical oscillations. Different factors influencing transfer damping of mechanical vibration were investigated in this work, e.g., material type and its thickness, excitation frequency of mechanical oscillations, size of mass load and effect of material composition. These factors were subsequently evaluated. Finally, suitable recommendations for passive damping of mechanical vibration were described.Web of Science20225830582
Fluid in Rectangular Tank – Frequency Analysis
Ground-supported tanks are used to store a variety of liquids. During earthquake activity the liquid exerts impulsive and convective pressures (sloshing) on the walls and bottom of the rectangular tank. This paper provides theoretical background for analytical calculating of circular frequencies and hydrodynamic pressures developed during an earthquake in rectangular container. Analytical results of first natural frequency are compared with experiment
Influence of horizontal seismic excitation on tank - fluid - soil seismic interaction
Ground-supported tanks are used to store a variety of liquids. During the earthquake activity
the liquid exerts impulsive and convective effects. This paper provides theoretical background for
hydrodynamic pressure that is being developing during an earthquake in the liquid storage groundsupported
rectangular container – the endlessly long shipping channel, is grounded on hard soil or
sub-soil
Vibration Analysis of Simply Supported Rectangular Tank Partially Filled with Water
Ground-supported tanks are used as fluid storage. One of the phenomena associated with the seismic response of liquid-filled tanks is the fluid motion occurring that causes “sloshing” at the top of free surface. This paper presents the theoretical of fluid response of rectangular tank due to horizontal acceleration of tank bottom, the impulsive and convective (sloshing) pressure and the fluid natural frequencies. The vibration analysis of fluid filled rectangular container was monitored and was evaluated in experiment for purpose to evaluation of the first frequency mode and vibration response of fluid were analysed by using FEM