In the seismic risk assessment of structures, two main random variables are involved, namely the vulnerability of the structure and the seismic action. The aim of the study presented here is to analyze the seismic behavior of the jacket-type offshore platforms as an expensive and vital structure. Furthermore, the influence of the incidence angle of the seismic action is also investigated by usi...

structural steels with very high strength levels are often referred to as ultrahigh-strength steels (uhss). the usage of uhss has been extensively studied in aerospace industries and offshore platforms. in this study, medium carbon low alloy steel (ams6305) was thermomechanicaly treated to obtain an ultra-high strength bainitic steel for aircraft engine compressor disk. a novel themomechanical ...

This report presents the Technical Performance Measures (TPM) methodology that has been developed to enable a first point assessment of North Sea steel jacket structures to be made· ● The methodology de-emphasises the quantitative structural reliability predictions that are currently employed in the North Sea safety case regime and employs a more qualitative approach to assessing the structural...

In this research, steel plate-fiber concrete composite jackets (SPFCJ) was used to strengthen the RC beams. The accuracy of analysis method evaluated by modeling beams fabricated in laboratory, and a good agreement observed. Variables finite element (FEM) include strength class main beam (15, 20, 25 MPa), length (1.4 2.8 m), type (RC jacket, SPFCJ, CFRP sheet), jacket thickness (40, 60 80 mm). ...

when a jack-up installed at a clay location and then leaves; it can create several meter deep footprints. in case of soft clay, the spudcan may have actually penetrated much deeper than the observed footprints. when the penetrated spudcan is pulled out, much of the soft remolded clay will flow around it and go back into the hole. this event, leaving a deep region of disturbed soil. the disturbe...