Vibration control of ocean platform based on buckling-restrained braces

Abstract

The conventional brace appears buckling easily under the strong earthquake. and it can not meet the demand of the structure. The hysteretic behavior is stable and the energy absorption capacity is good. The buckling — restrained brace (BRB) can undergo fully reversed axial yield cycles without loss of stiffness and strength. Ocean platform structure is complicated, and the surrounding environment is harsh. It is significant to study the platform structure vibration control. BRB structure with isolation layer under earthquake and ice load simulation is studied based on ANSYS. The results show that the BRB can reduce the seismic responses of the ocean platform and significantly suppress the maximal acceleration by dissipating the vibration energy through inelastic deformation. The seismic performance is improved. Therefore BRB with simlpe bilinear resilisence is adoptadopted in structure wiih more reqirment to resist horizontal and seismic load. It has a good future.