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Tsunamis: Forces on a vertical wall ...

Ramsden, Jerald Day.

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Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed./
Author:	Ramsden, Jerald Day.
Description:	278 p.
Notes:	Source: Dissertation Abstracts International, Volume: 54-05, Section: B, page: 2641.
Contained By:	Dissertation Abstracts International54-05B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9325383

Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed.
Ramsden, Jerald Day.

Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed. - 278 p.

Source: Dissertation Abstracts International, Volume: 54-05, Section: B, page: 2641.

Thesis (Ph.D.)--California Institute of Technology, 1993.

The major objective of this study has been to investigate experimentally the forces and overturning moments produced by tsunamis on vertical walls. The experimental results are compared with several analytical and numerical models. Several types of waves were used in a horizontal tank including solitary waves, undular bores, turbulent bores, and surges on a dry bed. Bores produced from breaking solitary waves in a tilting wave tank were also investigated. Various measurements were made, including the incident wave celerity, the wave profile, the runup, force, overturning moment, and pressure time histories. The impact process of the bores in the tilting wave tank were recorded with high-speed movies and the wave profiles in the horizontal tank were defined using a laser induced fluorescence system.Subjects--Topical Terms:

783781
Engineering, Civil.

Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed.
LDR:02988nmm 2200265 4500 001 1865103
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008 130614s1993 eng d
035 $a (UnM)AAI9325383
035 $a AAI9325383
040 $a UnM $c UnM
100 1 $a Ramsden, Jerald Day. $3 1952566
245 1 0 $a Tsunamis: Forces on a vertical wall caused by long waves, bores, and surges on a dry bed.
300 $a 278 p.
500 $a Source: Dissertation Abstracts International, Volume: 54-05, Section: B, page: 2641.
502 $a Thesis (Ph.D.)--California Institute of Technology, 1993.
520 $a The major objective of this study has been to investigate experimentally the forces and overturning moments produced by tsunamis on vertical walls. The experimental results are compared with several analytical and numerical models. Several types of waves were used in a horizontal tank including solitary waves, undular bores, turbulent bores, and surges on a dry bed. Bores produced from breaking solitary waves in a tilting wave tank were also investigated. Various measurements were made, including the incident wave celerity, the wave profile, the runup, force, overturning moment, and pressure time histories. The impact process of the bores in the tilting wave tank were recorded with high-speed movies and the wave profiles in the horizontal tank were defined using a laser induced fluorescence system.
520 $a Strong vertical accelerations were shown to occur during the reflection of bores and steep solitary waves at a vertical wall. These reduced the force on the wall relative to a hydrostatic force computed from the maximum runup height on the wall. For all cases, the maximum measured force and overturning moment were always less than computed from the maximum measured runup using hydrostatic considerations. At the transition from undular bores to turbulent bores, there was a discontinuity in the maximum water surface slope which corresponded with a rapid increase in the measured runup, force, and moment on the wall. The properly normalized force on a vertical wall due to the impingement of a bore on a midly sloping beach is shown to be equivalent to the force produced by a bore of constant volume on a horizontal bed.
520 $a A boundary integral element model, which solves the potential flow problem subject to the full nonlinear free surface boundary conditions, predicted the loads imposed on the wall due to steep solitary waves quite well. A finite difference model of the Navier-Stokes equations also predicted the solitary wave loads quite well; however, it over-predicted the steepness of the incident bore profiles and produced a force-time history with a high amplitude and short-duration peak, which was not observed in the measurements.
590 $a School code: 0037.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Engineering, Marine and Ocean. $3 1019064
690 $a 0543
690 $a 0547
710 2 0 $a California Institute of Technology. $3 726902
773 0 $t Dissertation Abstracts International $g 54-05B.
790 $a 0037
791 $a Ph.D.
792 $a 1993
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9325383