Graduate Thesis Or Dissertation

 

Active robust control of cable-stayed bridges Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/qf85ng60r

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  • Long bridges tend to develop large deformations under the action of intense dynamical loads such as wind or earthquakes. Unless these deformations are controlled in some fashion, the structure might suffer damage or even collapse. One possible solution to this problem is to apply external forces to the bridge through suspension cables. This work presents an active robust control scheme to suppress the vibrations caused by the vertical ground motion due to an earthquake of a cable-stayed bridge. It is proven both mathematically and through computer simulation that the active nonlinear controller is capable of reducing the amplitude of the vibrations to an arbitrarily small size. This may save the bridge structure during a strong earthquake. It is shown that the control scheme performs satisfactorily even if parts of the system fail during an earthquake. An alternative method to derive the control law using finite elements is also presented.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-02-12T15:14:18Z (GMT) No. of bitstreams: 1 ScheerDietmar1993.pdf: 1396993 bytes, checksum: 2ad6728d15c2a197f306a18e11ac5bf1 (MD5)
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