本文關(guān)鍵詞： 陡坎地形 P波斜入射 地面運(yùn)動(dòng) 放大系數(shù)　出處：《巖土力學(xué)》2017年06期 　論文類型：期刊論文

【摘要】：針對(duì)陡坎地形,采用數(shù)值模擬方法,探討了陡坎地形在P波斜入射時(shí),入射角度θ、坡角α和入射方向變化等參數(shù)對(duì)地震波傳播的影響。結(jié)果表明:(1)從陡坎底部到陡坎頂部,放大系數(shù)逐漸增大,而入射角度、坡角和入射方向沒(méi)有影響。(2)入射角度θ一定時(shí),無(wú)論地震波順著陡坎方向(左)入射還是逆著陡坎方向(右)入射,陡坎上側(cè)的放大系數(shù)大于陡坎下側(cè)的放大系數(shù)。同時(shí),放大系數(shù)隨著坡角α的增大而增大。(3)坡角α不變,地震波順著陡坎方向(左)入射時(shí),x分量的放大系數(shù)隨著入射角的增大而增大,z分量的放大系數(shù)則隨著入射角的增大而減小。(4)地震波逆著陡坎方向(右)入射時(shí),放大系數(shù)最大值基本在陡坎上側(cè)邊緣。地震波順著陡坎方向(左)入射時(shí),放大系數(shù)最大值并沒(méi)出現(xiàn)在陡坎上側(cè)邊緣,坡角越大,偏離越大。(5)地震波順著陡坎方向(左)入射時(shí),x分量的放大系數(shù)比地震波逆著陡坎方向(右)入射時(shí)的大,z分量變化不大。
[Abstract]:In steep terrain, using the method of numerical simulation, discusses the scarp terrain in oblique incident P waves, incident angle, angle and direction of influence of slope parameters such as the change of seismic wave propagation. The results showed that: (1) from the bottom to the top of steep scarp, the amplification coefficient increases gradually, and the incident no impact angle, slope angle and incident direction. (2) the incident angle is constant, regardless of the seismic wave along the scarp direction (left) or incident against the scarp direction (right) incident, multiplication coefficient is greater than the upper side of the steep scarp side. At the same time, the amplification coefficient increases with the increase of slope the angle alpha. (3) the slope angle constant, seismic wave along the scarp direction (left) incident, the amplification coefficient of x component increases with the increase of the incident angle, the amplification coefficient of Z component decreases with the increase of the incident angle of seismic wave. (4) against the steep ridge direction (right) the incident, the maximum amplification factor In the upper edge scarp. Seismic waves along the scarp direction (left) incident, the amplification coefficient of the maximum value did not appear in the upper edge of the scarp slope angle, the greater the larger the deviation is. (5) seismic waves along the scarp direction (left) incident when the amplification coefficient of X component ratio of seismic wave along the scarp direction (right) incident, z component did not change.

【作者單位】： 蘇州科技大學(xué)江蘇省結(jié)構(gòu)工程重點(diǎn)實(shí)驗(yàn)室;中國(guó)地震局工程力學(xué)研究所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(No.51278323);國(guó)家自然科學(xué)基金重大研究計(jì)劃集成項(xiàng)目(No.91215301)~~
【分類號(hào)】：P315.9

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