ICONE19-44137 CASE STUDY OF THE SENSITIVITY OF STRUCTURAL RESPONSE TO SEISMIC EVENT PARAMETERS

2011 ◽  
Vol 2011.19 (0) ◽  
pp. _ICONE1944-_ICONE1944
Author(s):  
Michael C. Costantino ◽  
Greg E. Mertz ◽  
Thomas W. Houston ◽  
Carl J. Costantino ◽  
Andrew S. Maham
Keyword(s):  
Seismic Event ◽  
Structural Response

scholarly journals Structural Assessment of the Hull Response of an FPSO Unit to Dropped Objects: A Case Study

2019 ◽  
Vol 26 (4) ◽  
pp. 39-46 ◽  
Author(s):  
Ozgur Ozguc
Keyword(s):  
Structural Damage ◽  
Local Buckling ◽  
Structural Response ◽  
Offshore Structures ◽  
Mechanical Equipment ◽  
Structural Members ◽  
Impact Area ◽  
Explicit Dynamic ◽  
The Impact

Abstract Offshore structures are exposed to the risk of damage caused by various types of extreme and accidental events, such as fire, explosion, collision, and dropped objects. These events cause structural damage in the impact area, including yielding of materials, local buckling, and in some cases local failure and penetration. The structural response of an FPSO hull subjected to events involving dropped objects is investigated in this study, and non-linear finite element analyses are carried out using an explicit dynamic code written LS-DYNA software. The scenarios involving dropped objects are based on the impact from the fall of a container and rigid mechanical equipment. Impact analyses of the dropped objects demonstrated that even though some structural members were permanently deformed by drop loads, no failure took place in accordance with the plastic strain criteria, as per NORSOK standards. The findings and insights derived from the present study may be informative in the safe design of floating offshore structures.

Risk Mitigation Through the Application of New Power Umbilical Technology

2012 ◽  
Author(s):  
Alan Dobson ◽  
Steven Frazer
Keyword(s):  
Aluminum Alloy ◽  
Deep Water ◽  
Risk Mitigation ◽  
Electrical Power ◽  
Structural Response ◽  
Power Cable ◽  
Enabling Technology ◽  
Effect Analysis ◽  
Design Case Study

This paper describes the substantial service life improvements that can be achieved through a new, high technology solution developed for deep water electrical power umbilical and cable applications. The new design represents an enabling technology for power cable projects in the deepest and most dynamic waters, provides a lower risk solution for risers in highly stressed conditions and can give a technically improved solution for the range of electrical power umbilical application. The significant advantages of aluminum alloy cable bundles over traditional copper cable bundles under static and dynamic loading associated with a typical deep water floating installation are presented. A design case study is used to illustrate improvements in structural response and fatigue life associated with the aluminum alloy cable cores against conventional technologies. The paper concludes with an overview of the associated risk reduction through the implementation of the aluminum alloy cables in the form of a failure mode and effect analysis.

Seismic Damage Control with Passive Energy Devices: A Case Study

1995 ◽  
Vol 11 (2) ◽  
pp. 217-232 ◽  
Author(s):  
Robert J. McNamara
Keyword(s):  
Damage Control ◽  
Structural Response ◽  
Seismic Damage ◽  
Reinforced Concrete Frame ◽  
Energy Devices ◽  
Concrete Frame ◽  
Supplemental Damping ◽  
Damper Design ◽  
Supplemental Dampers

This paper presents a theoretical case study of the effectiveness of supplemental passive damping devices in reducing structural response during seismic excitation. A six story special moment resistant reinforced concrete frame is studied with and without the aid of supplemental dampers. Response predictions are presented for each case. Preliminary damper design requirements are presented for a new facility implementing the supplemental damping system to reduce seismic damage and improve the post earthquake operational capability of the facility.

scholarly journals Effectiveness of reducing seismic hazard by means of group winning blasting - case study from a copper ore mine in Poland

2018 ◽  
Vol 66 ◽  
pp. 01010
Author(s):  
Anna Barbara Gogolewska ◽  
Natalia Czajkowska
Keyword(s):  
Seismic Event ◽  
Seismic Energy ◽  
Underground Mines ◽  
Copper Ore ◽  
Ore Deposit ◽  
South West ◽  
Effective Operation ◽  
Before And After

The copper ore deposit situated in the south-west of Poland is mined by three underground mines owned by KGHM Polish Copper JSC. Exploitation has been accompanied by rock burst hazard since the beginning. Thus, numerous different preventing measures have been developed such as temporary, organizational and long-term ones. However, no one has been able to predict the time, place and energy of a seismic event. The group winning blasting, with maximum number of blasted faces, is the most effective operation to reduce seismic threat. The more faces are blasted the more seismic energy should be reduced. The study aims at assessing the blasting effectiveness in inducing rock bursts and tremors. For this purpose, the seismic activity induced by mining and blasting were investigated. The number of blasting works and blasted faces as well as length of time between subsequent blasting works were analysed and related to provocation effectiveness. The linear correlation and different regressions were calculated to determine these relations. Moreover, the seismic energy reduction in the rock mass was evaluated by means of SRMS Index, which is a factor measured directly before and after blasting. The analyses covered one mine panel in the Polkowice-Sieroszowice copper mine over four-year period.

The non-uniform early structural response of globular proteins to cold denaturing conditions: A case study with Yfh1

2014 ◽  
Vol 141 (20) ◽  
pp. 205103 ◽  
Author(s):  
Prathit Chatterjee ◽  
Sayan Bagchi ◽  
Neelanjana Sengupta
Keyword(s):  
Structural Response ◽  
Globular Proteins

Numerical calibration of railway bridge based on measurement data

2021 ◽  
Author(s):  
Stefan Lachinger ◽  
Marian Ralbovsky ◽  
Alois Vorwagner ◽  
Doron Hekič ◽  
Mirko Kosič ◽  
...  
Keyword(s):  
Numerical Models ◽  
Measurement Data ◽  
Structural Response ◽  
Finite Element Models ◽  
Traffic Loads ◽  
Model Response ◽  
Independent Calibration ◽  
Truss Bridge ◽  
Calculated Model

<p>Bridges rarely behave precisely according to design assumptions. In most cases, they have some hidden reserves and behave preferable under traffic loads. To take these benefits into consideration numerical models can be calibrated based on measured structural response. The case study presented herein shows the calibration process for a railway truss bridge in Austria and the comparison of calibration results obtained by two individual teams. Each team did an individual and independent calibration based on different finite element models based on measured train passages. Both calibrations improved the precision of the calculated model response compared to the initial model, but also showed that the calibration parameters must be chosen with care to ensure plausibility of the results.</p>

Static Analysis of Gravity Dams Considering Foundation-Structure Interaction

2016 ◽  
Vol 857 ◽  
pp. 237-242
Author(s):  
Margaret Abraham ◽  
Bennet Kuriakose ◽  
Reni Kuruvilla
Keyword(s):  
Numerical Model ◽  
Structural Design ◽  
Seismic Analysis ◽  
Structural Response ◽  
Fluid Structure Interactions ◽  
Gravity Dams ◽  
Structure Interaction ◽  
Optimum Depth ◽  
Foundation Structure

A dam is an artificial barrier constructed across a stream channel to impound water. Analysis of stresses and displacements are inevitable for the structural design and failure analysis of dams. This paper deals with the numerical simulation of structural response of gravity dams, duly considering the foundation-structure interaction. The optimum depth and width of foundation extend to be considered in the numerical model is also studied. A parametric study based on the stiffness of the foundation is also exercised. As an application of the developed model, a case study of Peechi gravity dam is presented. This study proved the importance of consideration of foundation-structure interaction in the structural analysis of dams. The developed numerical model can be further improved for performing seismic analysis of gravity dams, considering the foundation-structure as well as fluid-structure interactions.

Resilience Calculation of Process Plants Under Seismic Loading: A Case Study

2019 ◽  
Author(s):  
Bledar Kalemi ◽  
Antonio C. Caputo ◽  
Fabrizio Paolacci
Keyword(s):  
Seismic Event ◽  
Quantitative Measure ◽  
Economic Losses ◽  
Seismic Region ◽  
Damage Scenarios ◽  
South Italy ◽  
Process Plant ◽  
Process Plants ◽  
Operational Capacity

Abstract Earthquakes causes approximately 8% of total accidents in industrial facilities. Although there are several researches in literature pertaining to industrial resilience, none of them provides a modelling framework to quantify the seismic resilience of process plants. This paper presents a methodology for providing a quantitative measure of resilience and business economic losses for the process plants in case of a seismic event. The two main parameters which have utmost influence on the resilience of a process plant are operational capacity and recovery time, so they must be evaluated in proper way. Plant mapping and components vulnerability are the key modelling parameters of plant operational capacity. Exact recovery step functions are introduced based on General Reconstruction Activity Network (GRAN), considering interdependencies between plant components. In order to illustrate the discussed method, a nitric acid plant is set up as a case study. “PRIAMUS” software is used to generate the most probable damage scenarios, assuming the plant is located in seismic region of South Italy, Sicily. Ultimately, recovery curves are constructed for each damaged scenario, and business economic losses are calculated according to direct cost and business interruption. In short, this methodology provides a good estimation of the most critical components and economic losses of a process plant in case of a seismic event.

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