Influence of soil- foundation- tank interaction on buckling strength of liquid storage tanks

被引:5
|
作者
Ulloa-Rojas, Juan
Colombo, Jose [1 ]
Wilches, Jose [2 ]
Leon, Roberto [3 ]
Almazan, Jose [4 ,5 ,6 ]
机构
[1] Univ Diego Portales, Dept Civil Engn, Ejercito 441, Santiago, Chile
[2] Univ Calif San Diego, Dept Struct Engn, 9500 Gilman Dr, La Jolla, CA 92013 USA
[3] Virginia Tech, Charles E Via Jr Dept Civil & Environm Engn, 200 Patton Hall, Blacksburg, VA 24060 USA
[4] Pontificia Univ Catolica Chile, Dept Struct & Geotech Engn, Santiago, Chile
[5] Pontificia Univ Catolica Chile, Ctr Nacl Excelencia Ind Madera CENAMAD, Ave Vicuna Mackenna 4860, RM, Santiago 7820436, RM, Chile
[6] Pontificia Univ Catolica Chile, Ctr Innovac Madera CIM UC CORMA, Ave Vicuna Mackenna 4860, Santiago 7820436, RM, Chile
关键词
Storage tanks; Seismic fragility; Tank buckling; Continuously supported tanks; Unanchored tanks; Finite element modeling; Capacity spectrum method; Pushover analysis; ANCHORED STEEL TANKS; NUMERICAL EVALUATION; STIFFNESS;
D O I
10.1016/j.engstruct.2024.117744
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Large earthquakes in the last 25 years have caused significant damage to buildings and infrastructure, including the partial or total collapse of storage tanks in various industries. Elephant foot buckling, or local buckling at the base, is one of the main failure modes observed in these structures, and this failure mode can lead to their collapse and/or complete loss of contents. Although hydrostatic and hydrodynamic loads typically affect the seismic response of tanks, the effect of soil type on tank buckling behavior has not been widely studied or recognized. This research aims to evaluate the effect of soil type on seismic fragility of tanks by analyzing typical storage tanks used in the wine industry. The work focuses on elephant foot buckling for tanks with both unanchored and anchored bases and compares the influence of three different types of soil and two different tank geometries. The approach uses the capacity spectrum method, as opposed to the more commonly used incremental dynamic analysis, to determine a critical peak ground acceleration to cause buckling at the tank. The tanks were subjected to 21 Chilean seismic records with three different soil types and a no-soil condition. From the results a lognormal fragility curve, and its median and standard deviation, are calculated. The results indicate that unanchored tanks built softer soils exhibit poorer performance, while tanks in competent soils and rock exhibit good performance. Anchored tanks show less sensitivity to soil types than unanchored tanks. The study demonstrates the importance of considering soil-foundation-structure interaction for wine storage tanks, but the results indicate that many comparable storage structures will be similarly affected.
引用
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页数:17
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