Seismic soil structure interaction analysis in time-domain on the dynamic response of structure using numerical modelling

Wahida, Dambam (2015) Seismic soil structure interaction analysis in time-domain on the dynamic response of structure using numerical modelling. MSc dissertation, University of Portsmouth.

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    Abstract

    Analysis of dynamic behaviour of structure due to soil-structure interaction (SSI)in the time domain is introduced in this research. SSI is a complicated phenomenon due to the complex behaviour of soil and dynamic analysis. Solving SSI is difficult with the use of analytical methods. However, numerical methods using highly developed computer techniques such as LUSAS are efficient. In this line of research, the interaction of a building structure and soil during seismic event, a phenomenon known as SSI is investigated by utilising LUSAS 14.6 FEA. Two models are established. Seismic analysis was carried out on the first model in order to examine the spectral response of a building tower frame with a fixed base. Subsequently, the second model was the same structure embedded in elastic medium rather than having a fixed base. Finite Element Method (FEM) analysis was carried out and models consisted of thick beam elements. The structure was subjected to a support condition excitation governed by the time histories of acceleration in the model global axis - 1940 El Centro Earthquake record was used. Spectral response calculations are performed using the IMD (Interactive model dynamics). Response of structure at ground and top node were considered and contact between the embedded columns and adjacent soil/elastic medium.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Jane Polwin
    Date Deposited: 21 Oct 2015 15:14
    Last Modified: 21 Oct 2015 15:14
    URI: http://eprints.port.ac.uk/id/eprint/18573

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