| Summary: | 碩士 === 國立交通大學 === 土木工程系所 === 104 === In recent years, the research of isolation and mitigation system has been getting more and more important. In the past isolation and mitigation system, the effect would be reduced because of unknown earthquake types. To have the best effect of response reduction, the systems have to be automatically changed with the earthquake type. To achieve that, an upgraded algorithm, Feed-forward Predictive Earthquake Energy Analysis (FPEEA), is proposed by considering the energy of earthquake velocity and combined with MEW method to have the optimal response. The new algorithm is starting with defining the energy of velocity to have the optimal weighting of MEW. With the optimal weighting defined, MEW method, combination of the potential energy and the kinetic energy, can reduce the structural responses efficiently and on time. In order to demonstrate the performance of the proposed algorithm, a single-degree-of-freedom structure is used as a benchmark in both numerical simulation and experimental verification. With defining the optimal weighting in advanced, the type of earthquake can be defined before the main wave of earthquake comes. The results have shown that the dynamic response of the structure can be effectively alleviated on time. Also, comparing to the structural responses of the MEW method, the proposed algorithm is similar to MEW or even better. The energy of velocity can be known to define the optimal weighting before the main wave comes. With this advantage, the shaking table test shows that the structural responses of experiment are similar to theory and under control in real- time.
|
|---|
