Experimental investigation on the seismic response of a steel liquid storage tank equipped with floating roof by shaking table tests

Abstract

In this paper, the effectiveness of the base isolation on steel storage tanks has been investigated through numerical models and then checked by shaking table tests on a reduced scale (1:14) model of a real steel tank, typically used in petrochemical plants. In the experimental campaign the floating roof has also been taken into account. The tests have been performed on the physical model both in fixed and isolated base configurations; in particular two alternative base isolation systems have been used: high-damping rubber bearings devices and sliding isolators with elasto-plastic dampers. Finally, a comparison between experimental and numerical results has also been performed

Shake table study of annular baffles in steel storage tanks as sloshing dependent variable dampers

“…For example, tank wall thickness cannot be chosen smaller than a certain value due to buckling or lateral instability and welding problems. Moreover, the use of liquid other than water could be too expensive due to the high volume of required liquid during tests (De Angelis et al, 2010).…”

Stress Analyses in Single Deck and Double Deck Floating Roofs Subjected to Earthquake Ground Motions

“…They showed the suppressing e ect of nonlinearities on the sloshing heights for a wide range of tank dimensions. In an experimental study, De Angelis et al [15] studied the response of base isolated cylindrical tanks with and without roofs to earthquake excitations. They showed that the base isolators and oating roofs could reduce the wall pressure and oscillation amplitudes signi cantly.…”

Using Linear Spectral Method when Calculating Seismic Resistance of Large-Capacity Vertical Steel Tanks

“…In the North Caucasus in such conditions large-capacity oil depots are exploited including vertical steel tanks of up to 100,000 m3. To ensure safe operation of large tanks, failure of which may result in environmental and material damage [1][2][3][4][5], it is necessary to develop and improve approaches to calculation of seismic resistance of such facilities.…”

“…If there are calculated accelerograms, representing a three-component function of acceleration to time, it is possible to determine deformation, strain and displacement in all points of the structure and fluids for a particular construction site at any moment of time t. Often, however, the results of microseismic zoning of the site are not available, forcing to "pick out" the most suitable existing design accelerograms. For example, in [3] using the direct dynamic method were obtained design calculations of the earthquake impact on the stress-strain state (SSS) of an insulated LNG storage tank, and was proposed a method of reducing the frequency of natural oscillations of the tank by applying damping inserts. However, the results can be extended only on tanks built according to the Chinese project for a specific site with a given impact accelerogram.…”

“…However, the results can be extended only on tanks built according to the Chinese project for a specific site with a given impact accelerogram. Experimental studies on seismic action on tanks using reduced models -"vibrating platetank-liquid" systems are presented in [1,3]. These experiments made it possible to obtain high-quality results aimed at further optimizing the design numerical models.…”