Seismic Response of Complex Soil Structure Systems
GCG was commissioned by RH to carry out a peer review of the seismic design methodology utilised by RH, including undertaking an independent check using dynamic 2-D dimensional finite element analyses of the most critical section. GCG also provided advice to RH on the tender design.
Work done by GCG in support of the tender design included finite element analyses using ICFEP. Analyses were performed using a linear elastic model with equivalent linear material properties for stiffness and damping, and also using a nonlinear cyclic model, which adopted a logarithmic function to describe the backbone curve, coupled with a Mohr-Coulomb failure criterion. One of the areas of concern examined was the rocking motion of the locks, which could lead to lift-off of the wall base or cumulative ratcheting deformations on the active side, due to fall in of cohesionless material.
Later, GCG also provided expert support to the Owner via a firm of solicitors for the Dispute Arbitration Board process. This considered claims by the wining Contractor after construction. The claims as related to seismic design and associated the construction of the Third Set of Locks.
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