Abstract
Aqueduct is the key structure in water conveyance engineering, which may be damaged during earthquake. Although numerous water conveyance designs have been built, the current state of researches on aqueduct aseismic design is inadequate. In this paper, based on the fluid-structure interaction dynamics and response spectra analysis, a simplified analysis method was proposed to evaluate the transverse seismic response of aqueducts, and the simplified calculating results were compared with the results of the nonlinear finite element calculation of fluid-structure interaction and experimental results. The results showed that the simplified analysis method put forward in this paper could be used to evaluate the transverse seismic response of aqueducts. In the condition that the pier height is less than 40 m, the first-order lateral vibration mode of the aqueduct has a higher model contribution rate; the simplified calculation method can achieve extremely high accuracy. The simplified calculation precision decreases as the height increases when the pier height exceeds 40 m.
Highlights
Freshwater resources on the Earth are very unevenly distributed [1, 2]
When the pier height is less than 40 m, the simplified analysis method proposed in this paper can be used to evaluate the transverse seismic response of aqueducts with fine precision
The comparisons of simplified calculation results and shaking table experiment results as well as the FEM simulated results proved that the simplified calculation formulas were reliable
Summary
Freshwater resources on the Earth are very unevenly distributed [1, 2]. To satisfy people's need in terms of production, living, and social development, a number of water conveyance channels has been built [3, 4]. Many researches on this problem are based on the dynamic analysis of storage vessels in the process of an earthquake. Based on the potential flow theories, Zhang et al analysed the dynamic features of water in aqueducts and derived a simplified model similar to the Housner model [16] This model effectively took into account the Tuned Liquid Damper (TLD) vibration absorption effect of sloshing fluid in the aqueduct under seismic action. In this paper, based on the fluid-structure interaction dynamic features of aqueduct under a transverse earthquake and fluid-structure interaction vibration theories [24], in accordance with the relevant codes [25, 26], a simplified method for transverse seismic response is proposed and compared with some numerical solutions and experimental results
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