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The Effects Of Offshore Mining Of Beach Quality Sediments On Nearshore Wave Climate, Frank R. Lonza
The Effects Of Offshore Mining Of Beach Quality Sediments On Nearshore Wave Climate, Frank R. Lonza
Civil & Environmental Engineering Theses & Dissertations
Coastal communities rely on the beaches to attract tourism, but these sources of revenue require maintenance, such as beach nourishment. In an effort to maintain these beaches without causing any detrimental results, research is conducted to determine what effects, if any, exist when mining for sand in offshore areas.
The U.S. Government is permitting the search for beach quality sands offshore but is also ensuring that such mining will not have adverse results to the nearshore wave climate. This study was conducted using a coarse grid bathymetric map to calibrate a numerical model developed by the Danish Hydraulic Institute (DHI). …
Elasto-Plastic Responses Of Buried Pipeline Systems Under Wave Propagation, Yuean-Chen Lau
Elasto-Plastic Responses Of Buried Pipeline Systems Under Wave Propagation, Yuean-Chen Lau
Civil & Environmental Engineering Theses & Dissertations
The purpose of this research is to study the elastic and inelastic behavior of buried pipeline system under arbitrary seismic wave propagation. Both continuous and segmented pipes with joints and junctions are included. The surrounding soil is simulated by a series of elasto-plastic springs uniformly distributed longitudinally and laterally along the pipes. To the joints, elasto-plastic longitudinal springs and bilinear rotational springs are adopted. It is assumed that the pipes remain linearly elastic. The effects of soil liquefaction and fault movement are not considered.
Since the dynamic effect has been found to be negligible, a quasi-static analysis is adopted in …