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Impact of damping modeling on the seismic response of base-isolated liquid storage tanks
Abstract Liquid-filled tanks are important infrastructure for the storage of water, chemicals and fuels, such as oil and liquefied natural gas (LNG). Many such large-scale tanks are located in regions with high seismicity. Therefore, very frequently base isolation technology has to be implemented to reduce the dynamic distress of the superstructure. In structural analysis software base isolators are modeled utilizing special nonlinear isolator elements. Global damping modeling of seismically isolated structures is a crucial issue, since improperly defined damping may worsen significantly the dynamic analysis results, mainly due to the so-called "damping leakage" phenomenon. For this purpose, this work is focused on the impact of damping modeling approach in the dynamic response of liquid storage tanks isolated via single friction pendulum bearings (SFPBs) under strong near-fault ground motions.
Graphical abstract Display Omitted
Highlights The employed damping modeling approach affects significantly the dynamic response of isolated liquid storage tanks. Constant damping (5%), interpolated damping and Rayleigh damping presented the best results for isolators’ displacements. In terms of computational cost, Rayleigh damping with override was proven the fastest method. Rayleigh damping with override and constant damping with override managed to control better damping leakage.
Impact of damping modeling on the seismic response of base-isolated liquid storage tanks
Abstract Liquid-filled tanks are important infrastructure for the storage of water, chemicals and fuels, such as oil and liquefied natural gas (LNG). Many such large-scale tanks are located in regions with high seismicity. Therefore, very frequently base isolation technology has to be implemented to reduce the dynamic distress of the superstructure. In structural analysis software base isolators are modeled utilizing special nonlinear isolator elements. Global damping modeling of seismically isolated structures is a crucial issue, since improperly defined damping may worsen significantly the dynamic analysis results, mainly due to the so-called "damping leakage" phenomenon. For this purpose, this work is focused on the impact of damping modeling approach in the dynamic response of liquid storage tanks isolated via single friction pendulum bearings (SFPBs) under strong near-fault ground motions.
Graphical abstract Display Omitted
Highlights The employed damping modeling approach affects significantly the dynamic response of isolated liquid storage tanks. Constant damping (5%), interpolated damping and Rayleigh damping presented the best results for isolators’ displacements. In terms of computational cost, Rayleigh damping with override was proven the fastest method. Rayleigh damping with override and constant damping with override managed to control better damping leakage.
Impact of damping modeling on the seismic response of base-isolated liquid storage tanks
Tsipianitis, Alexandros (author) / Tsompanakis, Yiannis (author)
Soil Dynamics and Earthquake Engineering ; 121 ; 281-292
2019-03-12
12 pages
Article (Journal)
Electronic Resource
English
2D , two-dimensional , 3D , three-dimensional , CDF , Cumulative Distribution Function , CSB , Concave Sliding Bearing , DI , Damage Index , EDP , Engineering Demand Parameter , ELF , Equivalent Linear Force , EPS , Earthquake Protection Systems , FNA , Fast Nonlinear Analysis , HDRB , High Damping Rubber Bearing , IDA , Incremental Dynamic Analysis , IM , Intensity Measure , LNG , Liquefied Natural Gas , MCE , Maximum Credible Earthquake , MSDA , Multi-Stripe Dynamic Analysis , NATECH , Natural & Technological disasters , PGA , Peak Ground Acceleration , QFPB , Quintuple Friction Pendulum Bearing , SFPB , Single Friction Pendulum Bearing , TFPB , Triple Friction Pendulum Bearing , VCFPS , Variable Curvature Friction Pendulum System , VFPS , Variable Friction Pendulum System , Damping , Liquid tanks , Seismic isolation , Fragility curves , Incremental dynamic analysis , Friction pendulum bearings
Impact of damping modeling on the seismic response of base-isolated liquid storage tanks
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