| Summary: | 碩士 === 國立宜蘭大學 === 土木工程學系碩士班 === 102 === Geosynthetic reinforced soil retaining structures (GRSRS) take over the role of the traditional retaining walls gradually and become the mainstream of retaining structures in Taiwan because of the advantages of easy construction, low construction cost, short construction period, better deformation tolerance, earthwork amount balance and good seismic resistance ability, etc. A great number of GRSRS in Taiwan have been used to improve the slope stability. However, during the 921 Chi-Chi Earthquake, many buildings and structures, including a few GRSRS, have been destroyed. In order to understand the performance of the seismic behavior of the GRSRS affected by the earthquake, this research set an earthquake monitoring system to record actual seismic data of GRSRS built in FoGuang University and then use PLAXIS finite element program to get more know-how.
This research sets earthquake monitoring system for the GRSRS built in FoGuang University as well as establishs the GRSRS dynamic monitoring research center in Ilan University. In order to understand the actual situation about GRSRS during the earthquake, we choose the hilly FoGuang University as the seismic monitoring site for research on reinforced slope, and thus set up the Geotechnical Experimentation Site for Monitoring Seismic Response of Geosynthetic Reinforced Slope. The second phase of this research is to perform GRSRS seismic response monitoring by setting seismic sensing instruments to monitor earthquakes in the all three stages of the study slope. Finally, the recording seismic data are used for validation of slope dynamic simulation and for analyzing GRSRS performance with the concept of system identification.
This research makes use of the seismic data recorded from the earthquake monitoring system to carry out PLAXIS finite element program. In view of the fact that the dynamic simulation of seismic parameters are the exact seismic data directly from seismic monitoring system, the dynamic simulation results from the analysis of geosynthetic reinforced slope are quite reliable. Finally, the predicted results obtained from PLAXIS finite element program are compared with the seismic monitoring system records. The agreeable comparison results give the confidence to explore the variation of maximum acceleration as well as the maximum tensile forces of the reinforcement material.
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