Dynamic experimental investigation on the uplift response of liquid storage tanks under seismic excitations with different characteristics

Abstract

A series of seismic table tests about the large steel cylindrical liquid storage tank models with floating roof were taken in this study. Horizontal and vertical direction seismic excitations were input respectively to the experimental structure system under different working conditions to test and analyze the seismic response behavior. The effects of various factors, such as the liquid surface height, the floating roof, the different wave amplitudes and frequencies, as well as their combined effects on the seismic dynamic response were obtained. The absolute displacement and the uplift response behavior law of the test models were obtained under different conditions. It was concluded that not only uplift value but also the absolute displacement of the tank bottom should be considered. And it should be noticed that a critical input frequency exists during the model response changing with frequency. In addition, important factors in experiment were described systematically in this article, for example, the experimental equipment selection, the experimental method, the tank model design, the laser displacement sensors, the data acquisition, the measurement point layout method, seismic excitation input method and so on. A reliable basis could be provided for theoretical analysis, structural design and computer numerical simulation research through this investigation.

Evaluation of the adequacy of a spring‐mass model in analyses of liquid sloshing in anchored storage tanks

“…The reason behind the amplification of stress was thought to be the activation of higher modes of breathing vibrations (in the circumferential direction). Yet, none of the references [14][15][16] analyzed the effect of the frequency content on the maximum hoop and axial stresses in the tank wall. This lack of knowledge concerning the relationship between the load frequencies and tank wall stress is a motivation for the present work.…”

“…The transient partial separation (uplift) of the tank from the support base 8–12 The characteristics of the seismic excitation, for example, frequency content, amplitude, and duration 13–16 The interaction between the soil and tank (soil‐structure interaction SSI) 17–20 …”

“…Manos and Clough 15 studied an aluminum tank subjected to the El‐Centro earthquake, with , , and peak ground accelerations. Fang et al 14 . tested a steel tank subjected to four sine excitations with different frequencies and maximum acceleration amplitude.…”

“…The characteristics of the seismic excitation, for example, frequency content, amplitude, and duration 13–16 …”

Dynamic Response of a 100,000 m3 Cylindrical Oil‐Storage Tank under Seismic Excitations: Experimental Tests and Numerical Simulations

“…Early examples of such tests could be found in Shih [19], Niwa and Clough [20], Haroun [21], Chiba et al [22], and Sakai et al [23]. In more recent years, shaking table tests which were conducted to investigate seismic responses of the liquid storage tanks include Tanaka et al [24], Pal et al [25], Nishi et al [26], De Angelis et al [27], Maekawa et al [28], Fang et al [29], Goudarzi et al [30], Pal and Bhattacharyya [31], Eswaran et al [32], Ormeño et al [33], and Park et al [34].…”