尾矿库地震动力响应特征研究

发布时间：2018-03-02 05:37

本文关键词： 尾矿库振动台数值模型放大系数动力响应　出处：《地震工程与工程振动》2017年02期 　论文类型：期刊论文

【摘要】：为研究尾矿库地震动力响应特征,本文依托象冲尾矿库,建立1:300缩尺的振动台试验模型,布设14个加速度传感器,在4 m×4 m振动台进行12个工况动力模型试验;采用三维激光扫描仪精准地采集尾矿库模型的坐标点云数据,建立三维数值模型,进行地震动力数值模拟。最后结合振动台试验结果的放大系数与数值模拟结果的永久位移云图、应力云图,深入研究尾矿库的动力响应特征。分析结果表明:尾矿库的动力响应与作用地震波的加速度峰值呈负相关的关系;含水率的提高对尾矿坝的动力响应有一定的放大作用,尤其是对滩面及外坡的下部的影响较为明显;尾矿库与地基山体和初期坝的接触位置处,更容易出现较大的应力,形成介质突变效应;永久位移随着高程的增加而变大,表明存在高程效应。
[Abstract]:In order to study the characteristics of seismic dynamic response of tailing reservoir, a shaking table test model with 1: 300 scale was established based on Xiangchong tailing reservoir, and 14 accelerometers were installed, and 12 dynamic model tests were carried out at 4 m 脳 4 m vibration table. The 3D laser scanner is used to accurately collect the coordinate point cloud data of the tailings reservoir model, and the three-dimensional numerical model is established. Finally, combining the magnification factor of the result of shaking table test with the permanent displacement cloud image of the numerical simulation result, the stress cloud image, The analysis results show that the dynamic response of tailing reservoir is negatively related to the peak acceleration of seismic wave, and the increase of water content can enlarge the dynamic response of tailing dam to a certain extent. In particular, the impact on the beach surface and the lower part of the outer slope is obvious; the contact position between the tailings reservoir and the foundation mountain body and the initial dam is more likely to appear larger stress, forming the medium mutation effect, and the permanent displacement increases with the increase of elevation. This indicates that there is a height effect.
【作者单位】：昆明理工大学土木工程系;
【基金】：昆明理工大学人才培养基金项目(KKSY201306142) 云南省交通厅科技项目(云交科2014A(02))~~
【分类号】：P315.9;TD926.4

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