An experimental investigation of th

An experimental investigation of the dynamic internal shear behavior of a hydrated needle-punched geosynthetic clay liner is
presented. Monotonic and cyclic displacement-controlled shear tests were conducted at a single normal stress to investigate the effects of
displacement rate, displacement amplitude, number of cycles, frequency, and motion waveform on material response. Monotonic shear
tests indicate that peak shear strength first increased and then decreased with increasing displacement rate. Cyclic shear tests indicate that
cyclic response was primarily controlled by displacement amplitude. Excitation frequency and waveform had little effect on cyclic shear
behavior or postcyclic static shear strength. Number of cycles




10

also had little effect on postcyclic static shear strength. Shear stress
versus shear displacement diagrams displayed hysteresis loops that are broadly similar to those for natural soils with some important
differences due to the presence of needle-punched reinforcement. Secant shear stiffness displayed strong reduction with increasing
displacement amplitude and degradation with continued cycling. Values of damping ratio were significantly higher than those typical of
natural clays at lower shear strain levels. Finally, cyclic tests with increasing displacement amplitude yielded progressively lower
postcyclic static peak strengths due to greater levels of reinforcement damage. Postcyclic static residual strengths were unaffected by prior
cyclic loading.

結果 (繁體中文) 1:

是水合的針刺非織造土工合成織物粘土襯墊的動態內部剪切行為的實驗研究提出了一種。在單一的正常應力研究的影響進行了單調和迴圈位移控制的剪切試驗位移速率、 位移幅值、 週期、 頻率和材料回應議案波形的數目。單調剪切測試表明，峰值抗剪強度先增加，然後隨位移率上升。迴圈剪切試驗表明，迴圈反應主要是由位移幅值控制的。激振頻率和波形對影響很小迴圈剪切行為或 postcyclic 靜態剪切強度。迴圈次數

10也有對 postcyclic 靜態剪切強度影響不大。剪應力與剪切位移圖顯示遲滯，大致類似于那些為天然土與一些重要由於針刺加固存在差異。割線剪切剛度顯示隨強還原位移幅值和退化與繼續迴圈。阻尼比的值均顯著高於典型的在低剪切應變水準的天然粘土。最後，隨著位移幅值的增加迴圈測試結果逐步降低postcyclic 靜態峰值強度，由於更大程度的加固損傷。Postcyclic 靜態殘餘強度受到事先迴圈荷載作用。

結果 (繁體中文) 2:

水合針刺土工合成材料黏土層的動態內部抗剪性能的實驗研究 ​​被
提出。單調和循環位移控制剪切試驗是在一個單一的正常應力進行研究的影響
位移速度，位移振幅，週期，頻率的數目，並運動波形上的材料的反應。單調剪切
試驗表明，峰值剪切強度先增大後隨位移速率下降。循環剪切試驗表明，
循環反應主要是由位移幅值控制。激勵頻率和波形對循環剪切影響不大
的行為或postcyclic靜態剪切強度。週期數
？
？
10
？
也對postcyclic靜態剪切強度影響不大。剪應力
與剪切位移圖顯示磁滯回線是大致相似與一些重要的天然土壤
的差異，由於針刺加固的存在。割線剪切剛度顯示隨著強還原性
位移幅值和降解與繼續騎自行車。阻尼比的值比典型的顯著較高
天然粘土在較低的剪切應變水平。最後，隨著位移幅值循環試驗取得了逐步降低
由於加固受損的更高水平postcyclic靜峰優勢。Postcyclic靜態殘餘強度均事先影響
循環載荷。