| Summary: | 碩士 === 淡江大學 === 土木工程學系 === 92 === To date, the application of TLCD (Tuned Liquid Column Damper) to engineering industry is mostly on buildings. None of application was observed on bridges so far. To facilitate the design efficiency of TLCD, this research aims at the goal of constructing design tables for practitioners. From the given structural properties, M, C and K, practitioners can quickly find out all the necessary optimal parameters for TLCD design, including the optimal head loss coefficient and frequency tuning ratio.
In this research, a single-degree-of-freedom damped structure equipped with a TLCD in both the horizontal or torsional motion is considered. The structure is subjected to either a white noise or harmonic excitation. In analysis, firstly nondimensionalization is performed on all variables, and secondly the minimization of performance is conducted through numerical optimization techniques. The optimal parameters, such as head loss coefficient and frequency tuning ratio, are thus obtained and tabulated in the design tables. Parametric studies are also performed to investigate the effect of other parameters on the performance of TLCD.
Results in the design tables demonstrate that the optimal frequency tuning ratio remains close to one, and the effect of the value of head loss coefficient is not as critical to the performance as frequency tuning ratio. A comparison to [Chang, and Hsu (1998)] also shows that the performance of TLCD design considering structural damping is very close to that without considering structural damping.
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