Earthquake Response Analysis Of Liquid Storage Tanks Under Lateral Excitations With Soil-Structure Interaction

Ground supported, vertical liquid-storage tanks are important facilities in oil storage and transportation. Since the 1930's, aimed at vertical storage tanks, many researches have been carried thought by the scholars home and abroad. So some conclusions which are beneficial to engineering design are obtained, and the criterions are established by different countries according to these researches. However, the dynamic response of the tanks is tending to complication because of its thin wall, base floating, large volume. So the vertical storage tanks that designed by the criterion are destroyed in the seismic disaster. The performance of liquid-storage tanks in these past earthquakes indicates that the seismic behavior and dynamic response mechanism is still needed studying further. At present, there are four aspects included in the study of dynamic response behavior: (1) theory research; (2) shaking table test research; (3) numerical analysis; (4) earthquake disaster investigation.In order to establish the numerical analysis method and obtain a better understanding on the dynamic behavior and dynamic response, a numerical analysis, combining with shaking table test research, is mainly carried out in this thesis, which can afford science warrant to engineering design. The main research and achievement are given as follows:Part 1: On the base of the summary of elastic-plastic theory and the analysis of different elastic-plastic constitutive models, the elastic-plastic constitutive relations which is fit for soil-tank system is confirmed.Part 2: The finite element analysis method used to solve the interaction between storage tanks and soil dynamic power is confirmed. The finite element analysis method model considering the interaction between storage tanks and soil and the fluid-solid coupling, the finite element model is built.Part 3: The shaking table test of the 1×10~3m~3 storage tank and the comparison and checking analysis between the test and numerical analysis are carried out, which validated the reliability of the finite element model of the storage tanks.Part 4: The modal analysis is proceeded for the popular eight kinds of tanks in the engineering, and the former three-level mode of the eight kinds of tanks is calculated respectively. At the same time, the influence analysis of parameter including geometry and material is processed.Part 5: The analysis of dynamic response of 2×10 m tank and 3×10 m tank under the horizontal earthquake is given out. The analysis includes the height of sloshing wave, the stress and the strain of the tank wall, the uplifting of the base plate and the base moment and base shearing force. The cause and destroying...