高聚物防渗墙土质堤坝地震加速度响应的动力离心试验研究

发布时间：2018-07-05 01:46

本文选题：高聚物防渗墙 + 土质堤坝　；参考：《地震工程与工程振动》2016年06期

【摘要】：为研究高聚物防渗墙土质堤坝地震加速度反应规律,采用El Centro波,在0.05 g、0.1 g、0.2 g和0.4 g工况下进行了高聚物防渗墙土质堤坝和传统刚性防渗墙—混凝土防渗墙土质堤坝的离心机振动台的对比试验。试验采用非等应力离心模型,利用加速度传感器测量了坝体不同位置的加速度时程响应。结果表明:高聚物防渗墙土质堤坝峰值加速度随输入地震动增加而增加,随坝高增加而增加,最大峰值加速度在坝顶上;高聚物防渗墙土质堤坝最大峰值加速度随输入地震动的增大呈线性增加趋势,而最大峰值加速度放大系数随输入地震动增大而减小;从模型试验的角度来看,在同等水平地震作用下,混凝土防渗墙土质堤坝抗地震加速度反应能力好于高聚物防渗墙土质堤坝,但在强震下混凝土防渗墙体发生了破坏,这一点可由附近土体加速度突增判断。
[Abstract]:In order to study the seismic acceleration response law of polymer impervious wall earth dike, El Centro wave is used. Under the condition of 0.05 g / g 0.1g / g and 0.4 g / g, the centrifuge shaking table of soil dike with polymer impermeable wall and traditional rigid impermeable wall and concrete impermeable wall earth dyke is tested. The acceleration time history response at different positions of the dam was measured by using the non-equal stress centrifugal model and the acceleration sensor. The results show that the peak acceleration increases with the increase of input ground motion and increases with the increase of dam height, and the maximum peak acceleration is on the top of the dam. The maximum peak acceleration of polymer impermeable wall earth dike increases linearly with the increase of input ground motion, while the maximum peak acceleration magnifying factor decreases with the increase of input ground motion. Under the action of the same level earthquake, the seismic acceleration response ability of the concrete impervious wall earth dike is better than that of the polymer impervious wall earth dyke, but the concrete impervious wall is destroyed under the strong earthquake. This can be judged by the acceleration of nearby soil.
【作者单位】：郑州大学水利与环境学院;郑州大学土木工程学院;
【基金】：国家自然科学基金项目(51579226) 水沙科学与水利水电工程国家重点实验室开放基金项目(sklhse-2016-c-02) 河南省基础与前沿技术研究计划项目(52110611) 河南省高等学校重点科研项目(15A570009)~~
【分类号】：TV312

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