Modelling of Turbine-generator and Foundation as Single Degree of Freedom Using Ruaumoko Programme
Shafii Abdullah1, Nor Hayati Abdul Hamid2
1Shafii Abdullah,  Faculty of Civil Engineering, University, Technology Mara, Shah Alam, Selangor, Malaysia.
2Nor Hayati Abdul Hamid, Associate Professor, Faculty of Civil Engineering, University, Technology Mara, Shah Alam, Selangor, Malaysia.
Manuscript received on November 28, 2012. | Revised Manuscript received on December 12, 2012. | Manuscript published on December 30, 2012. | PP: 67-76 | Volume-2, Issue-2, December 2012.  | Retrieval Number: A0715092112 /2012©BEIESP

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Abstract: A rigid-moment frame supporting the turbine-generator was designed according to BS 8110. This structure is subjected to vibrations of turbine-generators and seismic loading. Turbine-generator with its foundation is model as a single degree of freedom (SDOF) using RUAUMOKO program. RUAUMOKO program is employed in this study to analysis non-linear dynamic behaviour of turbine foundation using time-history analysis and Modified Takeda Model. Mode shape, natural period, natural frequency, nodal displacement, member forces and moment of reinforced concrete turbine foundation were obtained by running this program. The result shows that turbine foundation under Imperial Valley earthquakes does not exceed yield drift limit for monolithic connection and remain within the elastic condition. Thus, RC turbine foundation is safe and able to carry gravity load as designed according to BS 8110. Contradictory, turbine foundation experience exceeding yield drift limit but it is not safe and likely to collapse under San Fernando earthquake loading.
Keywords: Turbine-Generator, Turbine Foundation, non-linear Dynamic analysis, Time-history analysis, Yield drift limit.