期刊论文

He, Zhongming(hezhongming45@126.com)

中文

中南大学学报(自然科学版)

1672-7207

2020

51

9

2571-2579

10.11817/j.issn.1672-7207.2020.09.022

51978084:国家自然科学基金 51678073:国家自然科学基金 2020JJ4605:湖南省自然科学基金 2015JJ6004:湖南省自然科学基金

本校为第一机构

为了研究粗粒土高路堤在长期交通荷载作用下动力响应特性及应力场演变规律,基于相似理论,进行室内动力模型试验。试验中,将交通荷载按比例进行缩减,通过动力模拟装置施加在路堤模型上;利用MIDAS/GTS软件建立粗粒土高路堤数值模型,通过模型试验结果与数值计算结果对比分析,探讨粗粒土高路堤在交通荷载作用下的动力特性。研究结果表明:路堤产生的动应力、位移能表征轴载相互叠加的特性;在路堤同一深度处,交通荷载对车轮正下方的路堤土体动应力响应影响程度最大,车辆载重对路堤影响程度显著高于车速对路堤的影响程度;在路堤不同深度处,动应力出现明显滞后,动应力曲线呈非线性衰减变化特征;路堤在循...

In order to study the dynamic response characteristics and stress field evolution law of coarse-grained soil high embankment under long-term traffic load, based on the similar theory, an indoor dynamic model test was carried out. In the test, the traffic load was reduced by a ratio and applied in the embankment model through a dynamic simulation device. The numerical model of coarse-grained soil high embankment was established by using MIDAS/GTS software.Through comparative analysis of the test results and theoretical calculation results, the d...