فهرست مقالات Storage Tank

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  1 - A Comparison between Different Editions of API650 Seismic Provisions for Cylindrical Steel Storage Tanks Considering the Fragility Curves
  Hooman Fili
  Seismic safety of liquid storage tanks is of considerable importance due to its application in different industries. In Iran, most of these storage tanks are designed based on API650 code provisions. Despite designing tanks according to API standard, the lesson learned چکیده کامل

  Seismic safety of liquid storage tanks is of considerable importance due to its application in different industries. In Iran, most of these storage tanks are designed based on API650 code provisions. Despite designing tanks according to API standard, the lesson learned from previous earthquakes, shows different kind of damage occurring on them. This study is an investigation on evaluating different revisions of API650 seismic codes from years 2001 to 2013. The failure modes considered are Buckling, Overturning, Sliding and Shell Yielding. For this, three steel cylindrical tanks has been checked by different revisions of API650 under different PGA from 0.1 to 2 and various failure modes are taken into account respectively for each tank. According to these information, the fragility curves are derived and compared among all the revisions of API650 code. According to the resultsit seems that API650 in edition of 2001, Presents buckling criteria as the main criterion.This criterioncompared to the overturning criteria even in unanchored tanks determinedvery conservative.In these samplesthere were no overturning criteria prior. In 2005, 2009 and 2013 editions of API650 for unanchored tanks, presented overturning criteria as the main criterion considering the sliding and total stress failure criteria but for anchored tanks total stress failure criteria controlled much more conservatively. Generally buckling criteria not reported in prior. پرونده مقاله
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  2 - Construction cost estimation of spherical storage tanks: artificial neural networks and hybrid regression—GA algorithms
  Vida Arabzadeh S. T . A. Niaki Vahid Arabzadeh
  One of the most important processes in the early stages of construction projects is to estimate the cost involved. This process involves a wide range of uncertainties, which make it a challenging task. Because of unknown issues, using the experience of the experts or lo چکیده کامل

  One of the most important processes in the early stages of construction projects is to estimate the cost involved. This process involves a wide range of uncertainties, which make it a challenging task. Because of unknown issues, using the experience of the experts or looking for similar cases are the conventional methods to deal with cost estimation. The current study presents data-driven methods for cost estimation based on the application of artificial neural network (ANN) and regression models. The learning algorithms of the ANN are the Levenberg–Marquardt and the Bayesian regulated. Moreover, regression models are hybridized with a genetic algorithm to obtain better estimates of the coefficients. The methods are applied in a real case, where the input parameters of the models are assigned based on the key issues involved in a spherical tank construction. The results reveal that while a high correlation between the estimated cost and the real cost exists; both ANNs could perform better than the hybridized regression models. In addition, the ANN with the Levenberg–Marquardt learning algorithm (LMNN) obtains a better estimation than the ANN with the Bayesian-regulated learning algorithm (BRNN). The correlation between real data and estimated values is over 90%, while the mean square error is achieved around 0.4. The proposed LMNN model can be effective to reduce uncertainty and complexity in the early stages of the construction project. پرونده مقاله
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  3 - Consequence Modeling of a Rupture of Methyl Diethanolamine (MDEA) Storage Spherical Tank (Catastrophic Rupture Scenario)
  Mojtaba Khorani Mohsen Mansouri Seyyed Hossein Hosseini Naimeh Setarehshenas
  10.22034/jchr.2020.1875552.1043
  The rupture of flammable materials is one of the significant hazards existing in huge industry. In this study, the rupture of methyl diethanolamine (MDEA) tank in Ilam gas treatment refinery was modeled by PHAST (Process Hazard Analysis Software Tool) software. Distance چکیده کامل

  The rupture of flammable materials is one of the significant hazards existing in huge industry. In this study, the rupture of methyl diethanolamine (MDEA) tank in Ilam gas treatment refinery was modeled by PHAST (Process Hazard Analysis Software Tool) software. Distances with high risk was determined in fire and explosion scenarios versus consequence modeling. The results revealed that the catastrophic rupture scenario of MDEA tank in summer climates is the worst case with the highest risk, since in this case, the affected distance is about 2,450 meters for explosion overpressure, and 840 meters for vapor release; thus, these distances should be nonresidential. By considering a bund wall around the tank, the abovementioned distance reduce to 1,860 meters for explosion overpressure and 780 meters for vapor release. پرونده مقاله