高陡边坡沿高程地震动响应演化规律研究-《高速铁路技术》

文章信息/Info

Title:: Study on the Evolution Law of Ground Motion Response along High and Steep Slope

作者:: 安旭; 童心豪; 刘洋; 王翔; 丁选明; 1. 中国铁路北京局集团有限公司, 北京 100038;
2. 西南交通大学, 成都 610031;
3. 中铁二院工程集团有限责任公司, 成都 610031;
4. 中铁西北科学研究院有限公司, 兰州 730000;
5. 重庆大学, 重庆 400044

Author(s):: AN Xu; TONG Xinhao; LIU Yang; WANG Xiang; DING Xuanming; 1. China Railway Beijing Bureau Group Co., Ltd., Beijing 100038, China;
2. Southwest Jiaotong University, Chengdu 610031, China;
3. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;
4. China Railway Northwest Scientific Research Institute Co., Ltd., Lanzhou 730000, China;
5. Chongqing University, Chongqing 400044, China

Keywords:: slope|earthquakes|shaking table|response spectrum|ground motion response

摘要:: 高陡边坡工程受地震的威胁极大，振动台试验是研究边坡抗震的有效手段之一。本文通过制作坡度为60°的高陡边坡试验模型，并在大型单向地震模拟振动台上进行试验，的出主要试验结论如下：（1）地震波波形对峰值加速度放大系数在高程上的影响主要体现在变化幅值上；（2）不同地震波强度下，峰值加速度放大系数与高程均呈正相关关系；（3）在不同方向上，峰值加速度沿高程的放大系数有较大差异；（4）加速度反应谱沿高程的演化规律主要体现在短周期0.05 s附近，部分反应谱幅值有明显的提升效应。

Abstract:: High and steep slope engineering is greatly threatened by earthquakes, and the shaking table test is one of the effective means to study slope earthquake resistance. In this paper, a high and steep slope test model with a slope of 60° is made and tested on a large-scale unidirectional seismic shaking table. The main test conclusions are as follows: (1) The influence of seismic wave waveform on peak acceleration amplification factor in elevation is mainly reflected in the change amplitude. (2) Under different seismic wave intensities, there is a positive correlation between peak acceleration amplification coefficient and elevation. (3) In different directions, the amplification factor of peak acceleration along elevation is quite different. (4) The evolution law of acceleration response spectrum along elevation is mainly reflected in the short period of 0.05s, and the amplitude of some response spectra has seen obvious rising.