SUG II tanks impulsive spectral acceleration parameter#0183;Web viewImpulsive spectral acceleration parameter Eqn (10) Alternatively,Ai,may be determined using either (1) the impulsive period of the tank system,or (2) assuming the impulsive period = 0.2 sec;Typical Prestressed Concrete Tank Foundation Informationa prestressed concrete liquid storage tank 1.Recommended foundation system (granular base depth,type,etc.) 2.Ground water elevation at the tank location.3.Pertinent geotechnical parameter information (see back page) 4.Additional comments and concerns i.e.,Title Seismic Assessment of Steel Chemical Storage product specific gravity weight of the tank bottom (N) g acceleration due to gravity (m/sec2) H maximum design product level (m) I importance factor coefficient; = 1.0,1.25 and 1.5 for SUG I,II and III,respectively K coefficient for adjusting spectral acceleration (from 5 to 0.5% damping) n A

AbstractIntroductionSeismic Analysis of Liquid-Filled TanksNumerical Example and ResultsConclusionsAcknowledgmentsGround-supported cylindrical tanks are strategically very important structures used to store a variety of liquids.This paper presents the theoretical background of fluid effect on tank when a fluid container is subjected to horizontal acceleration.Fluid excites the hydrodynamic (impulsive and convective) pressures,impulsive and convective (sloshing) actions.Seismic response of cylindrical fluid filling tanks fixed to rigid foundations was calculated for variation of the tank slenderness parameter.The calculatinSee more on hindawiCited by 11Publish Year 2017Author Kamila Kotrasova,Eva KormanikovaAc and Ai results spectral accel parameter - Intergraph Oct 22,2009 SUG II tanks impulsive spectral acceleration parameter#0183;SDS-design spectral accel parameter 1.1700 FA -acceleration based site coefficient 1.3200 FV -velocity based site coefficient 1.8000 TS - FvS1 / FaSs 0.68182 TC -convective sloshing period (sec) 2.8863 Ac -convective spectral accel parameter 0.22286 Ai -impulsive spectral accel parameter 0.22286The Study of Seismic Response on Accelerated Contained Jan 01,2017 SUG II tanks impulsive spectral acceleration parameter#0183;The impulsive spectral accelerations are obtained from a 5% damped elastic response spectrum and the convective spectral accelerations are obtained from a 0.5% damped elastic response spectrum. of the fluid contained in tank as function of the tank slenderness parameter [gamma],(ii) comparison of component ratio of impulsive and convective Tank design - powerpoint slides - LinkedIn SlideShareFeb 04,2016 SUG II tanks impulsive spectral acceleration parameter#0183; = Effective impulsive portion of liquid weight,N = Total weight of the tank shell,N = Total weight of fixed tank roof including framing,knuckles,any permanent attachments and 10% of the roof design snow load,N = Total weight of the tank bottom,N

May 30,2015 SUG II tanks impulsive spectral acceleration parameter#0183;tank 700 kl 1.page 1 of 41 pt hydro raya - quote rekadaya-700 kl tank report printed - 4/29/2015 11:40:42 am etank full report - quote rekadaya-700 kl etank2000 mu 1.9.14 (26 oct 2010) table of contents page 1 etank settings summary page 2 summary of design data and remarks page 3 summary of results page 5 roof design page 8 shell course design page 13 bottom design page 22Storage Tank - DocShare.tipsNote The total weight of the tank roof will be added to the weight of tank content,since the roof is floating on the liquid.DESIGN SPECTRAL RESPONSE ACCELERATIONS Impulsive spectral acceleration parameter,Ai Ai = 2.5 Q Fa So I Rwi = 0.34 Convective spectral acceleration parameter,Ac When Tc TL Ac = 2.5 K Q Fa So Ts Tc I Rwc Ai = -Stability of Cylindrical Oil Storage Tanks During an dynamic acceleration affects the tank wall in two ways (1) impulsive pressure and (2) convective pressure.Impulsive movement comes from turbulent fluid over the tank,and convective pressure is applied as a part of fluid moves at the bottom of tank consistent with the shell.In fact,frequency of

dynamic acceleration affects the tank wall in two ways (1) impulsive pressure and (2) convective pressure.Impulsive movement comes from turbulent fluid over the tank,and convective pressure is applied as a part of fluid moves at the bottom of tank consistent with the shell.In fact,frequency ofSome results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextA Concise Structural Design Procedure of a Multi-Cellproportional to the acceleration of the ground motion but independent of the frequency of the fluid motion.Both occur in addition to the hydrostatic pressure distribution.A presentation of such forces is shown in Figure 2.The impulsive component involves the volume of water in the vicinity of the tankSome results are removed in response to a notice of local law requirement.For more information,please see here.12345NextImperfection-sensitivity of unanchored aboveground open The impulsive and convective response acceleration parameters are used to determine the effective hydrodynamic liquid pressures acting on the tank wall during the seismic event.One method to implement the effective pressures into the models is to apply the effective impulsive and convective masses used in the equivalent spring-mass system at

The impulsive spectral acceleration for T imp = 0.123 s, the unanchored slender tank exhibits the highest impulsive base shear values (due to higher acceleration levels,as presented in Figure Seismic analysis of steel liquid storage tanks by Jan 01,2012 SUG II tanks impulsive spectral acceleration parameter#0183;Highlights Thin-walled steel storage tanks are subjected to predesigned intensifying dynamic excitations.Methodology for seismic assessment of storage tanks by Endurance Time method is provided.Application of Endurance Time method is compared with the codified procedure in a stepwise manner.Practical versatility of the method in studying the effect of design changes is demonstrated.

Jan 01,1989 SUG II tanks impulsive spectral acceleration parameter#0183;The input ground motion was the N-S component of the 1940 El Centro earthquake.The maximum horizontal ground acceleration for this case was 0.348^.The spectral acceleration,Sfor the flexible shell-fluid systems were determined to be 0.858 g and 0.813^,for the tall tank (f=5.5cps) and shallow tank (f= 6.23 cps),respectively.Seismic Loads Based on IBC 2012/ASCE 7-10Risk Category I,II or III that are located where the mapped spectral response acceleration parameter at 1-second period,S1,is greater than or equal to 0.75 shall be assigned to Seismic Design Category E.Structures classified as Risk Category IV that are located where the mapped spectral response acceleration parameterSeismic Intensity Measures for Above-Ground Liquidnoteworthy overturning actions on the tank and thus the decoupling among impulsive and convective may reasonably be taken for granted especially for squat tanks [14,15].Evidently,from an assessment point of view,it appears that one is left with a single system influenced by two (largely uncorrelated) spectral acceleration ordinates [e.g.S a

of elevated tanks during the 2002 Bhuj India earthquake and correlated it to the inad-equacies in the prevailing practice.Seismic analysis of liquid-containing tanks differs from buildings in two ways rst,during seismic excitation,liquid inside the tank exerts hydrodynamic force on tank walls and base.Review of API 650 Annex E Design of large steel welded Mar 01,2017 SUG II tanks impulsive spectral acceleration parameter#0183;This is due to the fact that the impulsive base coefficient is a function only of the design short period spectral response acceleration parameter,S DS,which is constant for the each of the tank geometries.Therefore,the design base shear according to API 650 will vary linearly with the tank and content weight corresponding to the impulsive Proposed Appendix E re-write 04-200427 parameter at a period of zero seconds (peak ground acceleration for a rigid structure),%g 28 S1Mapped,maximum considered earthquake,5-percent-damped,spectral response acceleration 29 parameter at a period of one second,%g.30 SaThe 5-percent-damped,design spectral response acceleration parameter at any period based on

equal to 1.145.The tank thickness varies from 6.4 mm at its top course to 17.7 mm at its bottom course,the bottom plate is 6 mm thick,and has a 8-mm-thick annular plate.(b) The second tank considered,referred to as Tank II,is a tall tank of 18-meter-diameter tank with a total height of 20 meters.The filling height of the tank is equal to 19,Nuclear Operating Company U7-C-STP-NRC-090147Criterion B The impulsive hydrodynamic masses were assigned to the walls of the UHS SSI model,which does not assume that the basin is rigid.Therefore,the horizontal impulsive-mode spectral acceleration Sal was based on consideration of the flexibility of the tank.Moreover,an uplift check was performed and it wasLiquid Storage Tanks Seismic Analysis SpringerLinkThere exist several relevant standards and guidelines for the seismic analysis of liquid storage tanks.In this paragraph,the most important European and American Standards as well as the New Zealand Recommendations (Priestley et al.1986) are briefly presented.A basic standard on tank seismic design is the 4th part of Eurocode 8 (European Committee for Standardization 2006b).

Input Parameters Tank Information Tank ID Tank Foundation Type Input Unit System . (SUG) Site Class (Class) Impulsive Response Modification Factor (Rwi) Convective Response Modification Factor (Rwc) Impulsive Spectral Acceleration Parameter API 650 E-.4.6.1-1 0.017 - Convective Spectral Acceleration EVALUATING THE SPECTRAL ACCELERATION100% full and is designed according to Armenian SNIP II-6.02 seismic code for all filling strategies,taking into account the spectral acceleration level equal to Sa=0.40 g.On each model,the information of Convective mass,Impulsive mass and the spring stiffness of the convective and impulsive masses are added,due to the Housners Dynamic analysis of circular water tank and study of Sa/g= Average response acceleration coefficient for rock and soil sites as given by fig 2 and table 3 based on appropriate natural periods and damping..2.3 IS 11682 1985 Criteria for Design of RCC Staging for Overhead Water Tanks C l au s e 2.6.1 Braces For staging of height above.foundation greater than 6 m,the columns shall be rigidly connected by horizontal braces suitably spaced

Sa/g= Average response acceleration coefficient for rock and soil sites as given by fig 2 and table 3 based on appropriate natural periods and damping..2.3 IS 11682 1985 Criteria for Design of RCC Staging for Overhead Water Tanks C l au s e 2.6.1 Braces For staging of height above.foundation greater than 6 m,the columns shall be rigidly connected by horizontal braces suitably spaced DN TanksImpulsive Structural Coefficient,R i Convective Structural Coefficient,R c IBC 2012 1% Probability of Exceedance in 50 Years Seismic Design Category Mapped MCE R,5% Damped,Spectral Response Acceleration Parameter at Short Periods(S S)(% g) Mapped MCE R,5% Damped,Spectral Response Acceleration Parameter at a Period of 1 sec (S 1)(% g)Chapter 14 NONBUILDING STRUCTURE DESIGN2003 Provisions,Chapter 14 236 kh Horizontal ground acceleration (as used in the design of buried tanks and vessels).L Inside length of a rectangular tank,parallel to the direction of the earthquake force being investigated.M Overturning moment.Nh Hydrodynamic hoop force in the wall of a cylindrical tank or vessel R See Sec.4.1.4.Rp See Sec.6.1.4.

Seismic Design Parameters Site Class D Risk Category I/II/III S s Acceleration Parameter 1.427 g S 1 Acceleration Parameter 0.487 g F a Site Coefficient 1.0 F v Site Coefficient 1.513 S MS Adjusted MCE* Spectral Response Acceleration Parameter 1.427 g S M1 Adjusted MCE* Spectral Response Acceleration Parameter 0.737 g SAc and Ai results spectral accel parameter - Intergraph Oct 22,2009 SUG II tanks impulsive spectral acceleration parameter#0183;SDS-design spectral accel parameter 1.1700 FA -acceleration based site coefficient 1.3200 FV -velocity based site coefficient 1.8000 TS - FvS1 / FaSs 0.68182 TC -convective sloshing period (sec) 2.8863 Ac -convective spectral accel parameter 0.22286 Ai -impulsive spectral accel parameter 0.22286APPENDIX E Part I Provisions E.1 ScopeJan 01,2001 SUG II tanks impulsive spectral acceleration parameter#0183;WELDED STEEL TANKSFOR OIL STORAGE E-3 Ni Impulsive hoop membrane force in tank shell,N/mm (lbf/in.) PA Anchorage attachment design load,N (lbf) PAB Anchor design load,N (lbf) PI Plasticity index,ASTM D 4318-93 Q Scaling factor from the MCE to the design level spectral accelerations; equals 2/3 for ASCE 7 R Force reduction coefficient for strength level design methods

proportional to the acceleration of the ground motion but independent of the frequency of the fluid motion.Both occur in addition to the hydrostatic pressure distribution.A presentation of such forces is shown in Figure 2.The impulsive component involves the volume of water in the vicinity of the tank1.Introduction - Hindawi Publishing CorporationIn this study fluid filling of ground-supported cylindrical rigid tank is analyzed.The characteristics of fluid filling are H = 2 m and R,inner radiuses of cylindrical tanks,where R depended on tank slenderness parameter = H / R..For the tank slenderness parameter = 0.3 is the inner radius of tank R 6.667 m,(i).for = 0.5 R is 4 m,(ii)1 Probabilistic Seismic Hazard Assessment in Greeceacceleration as a hazard parameter and proposed a 5% damped uniform hazard acceleration response spectra for 11 Greek cities computed for 475 years return period.In addition they have investigated the spectral acceleration amplification factors based on rock and alluvium soil

design shall consist of dead load of the tank and 1/3 the weight of the staging .When Full The weight of content is to be added to the weight under empty condition using period T appropriate the spectral acceleration shall be read off from avg.Acceleration spectra.The design horizontal seismic Coefficient h shall be calculated.(PDF) Design of a Floating Roof Crude Oil Storage Tank of Design Convictive spectral acceleration Parameter, *Impulsive spectral acceleration A i = 0.3 4 % g required freeboard for the SUG III tanks shall be equal to the sloshing wave height,

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