... soil resistance–displacement relationship for input to fatigue analysis. spring-dashpot method offshore well displacement stiffness soil response framework soil spring diameter fatigue assessment conductor frequency fatigue analysis upstream oil & gas apparatus spring-only method...

... to contribute to the standardization of the seismic design procedure for subsea structures. The paper selected a typical subsea valve skid with a mudmat foundation for the seismic response spectrum analysis. Upper and lower bound values of soil springs were included to capture the response in relation...

... in development of a simplified approach involving the nonlinear soil springs. Fatigue analyses indicated that this simplified approach can predict fatigue damage as measured in the SCR centrifuge tests. Centrifuge tests were also performed to determine the impact of trench depth on SCR fatigue. The tests...

... of the pipeline on distributed strain-softening soil springs. The input motion in the latter analysis is the asynchronous acceleration time histories computed on the surface of the slope along the pipeline in the first step. The computational model developed for this purpose, Quiver_pipe , is the result...

...-on-Winkler foundation method approximates the soil reaction, which is continuous with depth, by a series of isolated soil springs, and the method neglects the interaction between such soil springs. Due to this simplification the method is efficient. The method, however, has been shown to yield reliable pile...

... 1inear soil springs. Many of these programs however cannot accommodate the pile-soil-pile interaction effects required to model pile groups. A method of modelling the pile groups has been developed to provide such a facility giving structure/ foundation compatibility and permitting the individual pile...

... tests on the soil, the soil parameters reqUired to achieve satisfactory agreement between the field and predicted response of the pile are evaluated. Results of this study indicate that the soil spring and soil quake are functions of the pile diameter. Together, these two soil parameters govern...

... rotation stiffness upstream oil & gas eccentricity offshore tower compatibility case 3 tower leg engineer offshore structure iteration soil spring column effect spring stiffness procedure artificial intelligence displacement offshore technology conference mudline...