Rationalization of Structural Stiffness of Offshore Platform with Rocking-Wall

Han, Gu; Jiang, Zhi Wei; Nie, Li Wu; Zhang, Ji Gang

doi:10.4028/www.scientific.net/amm.351-352.923

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rocking walls have been used effectively in seismic retrofit of existing and historical structures [19] and a number of design configurations have been proposed in the literature and included in seismic design codes and recommendations. Studies showed that rocking wall systems can also greatly improve the seismic performance of offshore platforms [20,21]. However, and although the performance of these systems has been studied and documented in research and practice, some aspects of their behavior during rocking motion, particularly in the presence of nonlinear deformations in the soil, are still not fully investigated.…”

Section: Introductionmentioning

confidence: 99%

Modelling Radiation Damping in Rocking Wall Systems

Reza

Haikal²

2018

ACET

View full text Add to dashboard Cite

In the growing concern of sustainable infrastructure, rocking wall systems have emerged as an economically viable solution to provide seismic resilience, particularly for the rehabilitation of existing structures. Rocking walls are stiff elements that can rotate freely, or rock, at their base, and constrain a structure to its first node of vibration under lateral loading. This prevents undesirable mechanisms such as soft story failure and activates plastic hinges in other parts of the structure, which ensures maximum energy dissipation and mitigates seismic structural damage. Although the performance of rocking wall systems has been studied in research and practice there are issues regarding their rocking motion, particularly in the presence of dissipation in the soil, otherwise referred to as radiation damping. Current practice for estimating radiation damping uses an equivalent damping ratio, originally developed for a rigid rocking block on rigid soil. In this study, we discuss some of the available approaches for modelling radiation damping and highlight the importance of modelling the effect of soil dissipation on wall behavior.

show abstract

Section: Introductionmentioning

confidence: 99%