Analysis of vibration reduction performance for the novel tension-only vibration reduction device

The wind-induced vibration of large-span roof structures under wind load can potentially cause damage to non-structural components or the structure itself. To address this issue, a novel tension-only vibration reduction device is proposed specifically for large-span cantilevered roofs. The tension-only vibration reduction device is designed to only be subjected to tension without compression, thereby increasing the vertical stiffness of the structure and dissipating the vibration energy after yielding. It incorporates a unique wedge-tooth structure that offsets a portion of the plastic deformation of the steel rod, ensuring the continued functionality of the device. The SAP2000 software is used for modeling analysis and comparison of the proposed steel rod device and steel cables. The results indicate that the average wind and fluctuating wind displacement at the roof truss nodes are reduced following the implementation of steel rods or steel cables. Moreover, the vibration reduction device demonstrates a certain level of effectiveness in reducing vibrations. Comparing the vibration reduction effect of steel tension rods and steel cables, when the average tension of the two vibration reduction devices is similar, the vibration reduction effect of steel tension rods on average wind is not as good as that of steel cables. However, the vibration reduction effect on fluctuating wind is better than that of steel cables. Although the unique wedge-tooth structure can eliminate part of the plastic deformation, it requires a sufficient amount of plastic deformation to be effective. Before reaching this threshold, the additional stiffness and energy dissipation performance of the steel rods may start to weaken as the accumulation of plastic deformation. •A new tension-only vibration reduction device consisting mainly of steel rods is proposed.•A practical project model was established to compare the vibration reduction effects of tension cables and tension-only rods on the large-span structure.•This tension-only vibration reduction device is effective in damping large-span roofs.•Under the action of wind load, the steel rods can dissipate energy through plastic deformation.