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題 名 | An Experimental Study on Seismic Response of Physical Anti-dip Rock Slope Models by Shaking Table Tests=以振動臺試驗探討逆向坡物理模型之受震反應 |
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作 者 | 陳祺杰; 李宏輝; 邱雅筑; 楊長義; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 31:7 2019.11[民108.11] |
頁 次 | 頁615-621 |
專 輯 | 「岩盤工程」特刊 |
分類號 | 434.273 |
關鍵詞 | 逆向坡; 振動臺試驗; 極限平衡法; Anti-dip rock slope; Shaking table test; Limit equilibrium analysis method; |
語 文 | 英文(English) |
中文摘要 | 本研究透過一系列振動台試驗,利用16個獨立塊體組成的物理模型,探討逆向坡和其組成塊體的受震反應與穩定性。實驗以不同的加速度與頻率所組成之模擬地震荷載,施加於物理模型上,並以高速攝影機進行全程記錄,據以分析整體模型與個別塊體的受震反應。根據研究結果整理下列幾點:(1)模型的加速度反應與岩塊組合而成的幾何形狀和地震條件有關;(2)塊體最大滑移量和旋轉角隨頻率增加而減小;(3)在頻率為4 Hz,PGA從0.24 g增加到0.48 g時,坡底塊體的滑移量比坡頂大,各塊體旋轉角也隨之增加;(4)極限平衡分析法低估了破壞程度,無法反映實際的破壞模式。 |
英文摘要 | This study examines the seismic response and stability of whole anti-dip rock slope and individual composed blocks by a series of shaking table tests with a physical model consisting of 16 independent blocks. In the tests, different peak ground accelerations (PGA) and sine waveform frequencies were considered as seismic loadings, including PGA of 0.24 g, 0.4 g, and 0.48 g at a constant 4 Hz frequency and frequencies of 4, 5, and 6 Hz under a constant PGA of 0.24 g. The images of the seismic response of the whole model and the component blocks were captured by a high-speed camera. In addition, the stability of the physical model under seismic loading was analyzed by the limit equilibrium method and was compared with the test results. The preliminary findings are summarized as follows: (1) the acceleration responses of the model are related to the geometries of the composed blocks and the seismic conditions; (2) the maximum sliding displacement and rotation angle of a block will decrease with an increase of frequency; (3) at a frequency of 4 Hz, the PGA increases from 0.24 g to 0.48 g, the sliding displacement of the blocks near the bottom of the slope were larger than those near the top, and the rotation angle also increases with increasing PGA; (4) Limit equilibrium analysis results show that it underestimate the actual degree of destruction and it can't reflect the actual destructive mode. |
本系統中英文摘要資訊取自各篇刊載內容。