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| Single-side pounding TMD and its application in bridge’s VIV control |
| WANG Xiuyong1, HU Renkang1, WU Chenfeng1, WANG Wenxi2, CHEN Ning1 |
1. Hunan Provincial Key Lab of Structures for Wind Resitance and Vibration Control, Hunan University of Science and Technology, Xiangtan 411201, China;
2. Hunan Provincial Key Lab for Bridge and Wind Engineering, Hunan University, Changsha 410012, China |
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Abstract Single-side pounding tuned mass damper (SPTMD) is a new type of vibration reduction device to reduce structural vibration with inertial force and viscoelastic pounding. Here, dynamic performance of SPTMD, pounding force model and verification, and VIV control of bridge segment model with SPTMD were studied theoretically and tested. According to features of a mass block’s single-side motion restriction and collision, the dynamic performance of SPTMD was obtained. Impact tests between steel and viscoelastic material were conducted. The impact force model was proposed, its parameters were identified with test data and the model was verified. VIV’s wind tunnel tests were conducted for a bridge segment model with scale of 1:40. The results showed that obvious VIV appears under wind attack angle of +7°. The model’s aerodynamic parameters were identified according to the simple harmonic vortex excitation force model. The effect of SPTMD to control bridge’s VIV were estimated with simulation analysis, the results indicated that the vibration reduction efficiency can reach 87% under conditions of 2% mass ratio and the maximum VIV amplitude wind velocity. The effect of SPTMD to control bridge’s VIV was studied with wind tunnel tests, the results indicated that the vibration reduction efficiency can reach 92% under conditions of 2% mass ratio and the maximum VIV amplitude wind velocity. The theoretical analysis and test results indicated that SPTMD has good vibration reduction effect on bridge’s VIV.
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Received: 29 June 2018
Published: 28 December 2019
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