【摘要】：廢舊輪胎、三向土工格柵等新型筋材用于巖土工程加筋,經(jīng)濟(jì)環(huán)保且力學(xué)性能優(yōu)良.采用振動(dòng)臺(tái)模型試驗(yàn),分別對未加筋邊坡、三向土工格柵邊坡、廢舊輪胎串與三向土工格柵復(fù)合加筋邊坡、輪胎串與輪胎碎片復(fù)合加筋邊坡模型在地震作用下的動(dòng)力響應(yīng)性能進(jìn)行了研究,探討了邊坡結(jié)構(gòu)在不同地震波形輸入、不同加速度峰值和不同加筋方式下,未加筋邊坡與復(fù)合加筋邊坡的加速度分布規(guī)律.試驗(yàn)結(jié)果表明:加筋方式對加筋抗震效果影響比較顯著,同種加筋方式的加速度響應(yīng)效果在不同地震波作用下規(guī)律相近;三向格柵、三向格柵與輪胎串復(fù)合加筋、輪胎串與輪胎碎片復(fù)合加筋在汶川波激勵(lì)下,其加速度放大倍數(shù)較未加筋邊坡相比,最大減小幅度分別為37.5%、30.0%、21.0%,前者加速度放大倍數(shù)減小幅度分別是后兩者的1.4倍和2倍;不同加筋方式下,邊坡的加速度放大倍數(shù)隨地震激勵(lì)水平的提高呈非線性增加,但與未加筋邊坡相比,隨輸入加速度峰值增大而呈現(xiàn)明顯的增幅遞減趨勢;各種加筋土邊坡與未加筋邊坡加速度放大倍數(shù)均沿坡面約1/3高程處隨高度增加而逐漸增大,并在靠近邊坡頂部位置達(dá)到最大值.遷安波產(chǎn)生的加速度響應(yīng)明顯強(qiáng)于其他3種地震波的激勵(lì).
[Abstract]:The new reinforced materials, such as waste tires and three direction geogrid, are used in geotechnical engineering, which are economical and environmental friendly and have good mechanical properties. Using shaking table model test, the reinforced slope of unreinforced slope, three-direction geogrid slope, waste tire string and three-direction geogrid composite reinforced slope were studied respectively. The dynamic response performance of the composite reinforced slope model of tire string and tire debris under earthquake is studied. The slope structure under different seismic waveform input, different acceleration peak value and different reinforcement mode is discussed. Acceleration distribution of unreinforced slope and composite reinforced slope. The experimental results show that the reinforcement mode has a significant effect on the seismic effect of reinforcement, the acceleration response effect of the same reinforcement mode is similar under different seismic waves, the three direction grid, three direction grid and tire string composite reinforcement, Under Wenchuan wave excitation, the maximum decreasing amplitude of acceleration magnification of tire string and tire fragments is 37.530.010 and 21.0, respectively, and the amplitude of acceleration magnification of the former is 1.4 times and 2 times of that of the latter, respectively. Under different reinforcement modes, the acceleration magnification of slope increases non-linear with the increase of earthquake excitation level, but it decreases obviously with the increase of the peak value of input acceleration compared with the unreinforced slope. The magnification ratio of acceleration of each reinforced soil slope and unreinforced slope increases gradually with the increase of height along the slope surface about 1 / 3, and reaches the maximum near the top of the slope. The acceleration response of Qian'an wave is obviously stronger than that of the other three kinds of seismic waves.
【作者單位】： 湖北工業(yè)大學(xué)土木建筑與環(huán)境學(xué)院;清華大學(xué)水沙科學(xué)與水利水電工程國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51678224) 湖北省教育廳重點(diǎn)資助項(xiàng)目(D20151402) 湖北省高等學(xué)校優(yōu)秀中青年科技創(chuàng)新團(tuán)隊(duì)計(jì)劃資助項(xiàng)目(T201605)
【分類號(hào)】：U416.1

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