Abstract
Abstract The dynamic characteristics and liquid sloshing of a circular tank are analysed using ADINA software through seismic response analyses. The maximum sloshing wave height for the circular tank under unidirectional horizontal seismic action is developed. The calculation method involves three parameters such as tank radius, seismic coefficient and dynamic coefficient. The dynamic coefficient of liquid sloshing is determined corresponding to the long-period seismic design β spectrum with a 5% damping ratio using basic sloshing period. The established method can guide the seismic design of liquid-containing structures. The established method of calculating sloshing wave height is compared with those in the American code.
Highlights
Reinforced concrete water tanks which play essential functions in the entire water supply system are typical liquid-containing structures
To reasonably guide the seismic design of the tank in the water supply system, the liquid sloshing of the circular tank under seismic action is the focus of this research and further obtaining the law of liquid sloshing is the purpose of this research
The sloshing law of liquid surface for ground rested circular RC tank under unidirectional horizontal seismic action 295 and sloshing wave height of the vertical storage tank are analysed by using ADINA finite element software
Summary
Reinforced concrete water tanks which play essential functions in the entire water supply system are typical liquid-containing structures. The formula for calculating the actual displacement of the liquid surface for the circular tank under the horizontal seismic action is given by professor Epstein [5]. The dynamic behaviour characteristics, including beam-type and oval-type vibration of a cylindrical liquid-containing tank under horizontal earthquake excitation, are investigated by shaking table tests [12]. The sloshing law of liquid surface for ground rested circular RC tank under unidirectional horizontal seismic action 295 and sloshing wave height of the vertical storage tank are analysed by using ADINA finite element software. Based on the above analyses, the ground circular tank’s dynamic characteristics in water supply systems with different capacities are analysed by using theoretical analysis and numerical simulation methods. Based on the original theoretical formula, the calculation formula of the sloshing wave height for the water tank is fitted
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