本文選題：離心振動(dòng)臺(tái)試驗(yàn) + 錨索抗滑樁��； 參考：《自然災(zāi)害學(xué)報(bào)》2017年03期

【摘要】：時(shí)程響應(yīng)是發(fā)展錨索抗滑樁抗震技術(shù)和改進(jìn)抗震設(shè)計(jì)方法的基礎(chǔ)。基于離心模型試驗(yàn)平臺(tái),設(shè)計(jì)完成了50g離心加速度條件下錨索抗滑樁加固滑坡體的振動(dòng)臺(tái)模型試驗(yàn)。輸入了4種不同強(qiáng)度的Taft地震波,利用布設(shè)在不同位置的微型傳感器,記錄了樁身和滑坡體的動(dòng)態(tài)時(shí)程數(shù)據(jù),并以此為基礎(chǔ)分析了樁身和滑坡體不同位置的時(shí)程響應(yīng)規(guī)律。結(jié)果表明,錨索抗滑樁和坡體的時(shí)程響應(yīng)均受輸入地震動(dòng)控制,其動(dòng)態(tài)變化形式與輸入地震動(dòng)基本一致;峰值加速度在基巖內(nèi)部變化不大,在坡體內(nèi)部從外向內(nèi)呈現(xiàn)先減小后增大的趨勢(shì);不同高程的PGA放大系數(shù)呈現(xiàn)高程效應(yīng),坡面存在淺表動(dòng)力效應(yīng);坡體內(nèi)部PGA放大系數(shù)總體上隨輸入地震動(dòng)的增大而增加,但在基巖面附近放大效應(yīng)不明顯;錨索的加設(shè)有效降低了坡體內(nèi)部中心位置的加速度放大效應(yīng)。研究成果可為開(kāi)發(fā)科學(xué)合理的錨索抗滑樁抗震設(shè)計(jì)方法和驗(yàn)證數(shù)值模擬成果提供參考依據(jù)。
[Abstract]:Time-history response is the basis of developing anti-sliding pile seismic technology and improving seismic design method. Based on the centrifugal model test platform, the shaking table model test of anti-slide pile reinforced by anchor cable under 50 g centrifugal acceleration was designed and completed. Four kinds of Taft seismic waves with different strength were inputted, and the dynamic time history data of pile body and landslide body were recorded by using micro-sensors arranged in different positions. Based on these data, the time-history response law of pile body and landslide body at different positions was analyzed. The results show that the time-history response of anti-slide pile and slope body of anchor cable is controlled by the input ground motion, and its dynamic change is basically the same as that of the input ground motion, and the peak acceleration does not change much in the bedrock. The PGA magnification coefficient of different elevation shows elevation effect and superficial dynamic effect, and the PGA magnification coefficient of slope increases with the increase of input ground motion as a whole, the PGA magnification coefficient decreases firstly and then increases from outside to inside the slope, and the PGA magnification coefficient of different elevation shows elevation effect and superficial dynamic effect on the slope, and the PGA magnification coefficient increases with the increase of input ground motion. However, the amplification effect near the bedrock surface is not obvious, and the acceleration amplification effect in the central position of the slope is effectively reduced by the addition of anchor cables. The research results can provide a reference for the development of scientific and reasonable anti-slide pile seismic design method and verification of numerical simulation results.
【作者單位】： 中國(guó)地震局工程力學(xué)研究所中國(guó)地震局地震工程與工程振動(dòng)重點(diǎn)實(shí)驗(yàn)室;地殼運(yùn)動(dòng)監(jiān)測(cè)工程研究中心;浙江省交通工程建設(shè)集團(tuán)有限公司;桂林理工大學(xué);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41172293;51408559)~~
【分類號(hào)】：P642.22;TU435

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