摘要
对高速公路岩土边坡支护结构的力学特征进行分析时,岩土边坡的稳定性受到各方面因素影响,导致计算得到的力学参数与实际参数不符,难以做出准确分析。对此,提出岩土边坡支护结构的震动力学有限元分析方法。运用有限元分析软件构建高速公路岩土边坡支护结构力学有限元模型。输入地震波求解,并观察边坡支护结构的受力、变形情况,根据拟动力法模拟地震波的传播,充分考虑纵波和横波从坡脚传播到坡顶的阻尼力对地震波的影响,获取地震作用下的动力响应规律,求出震动作用下的力学参数。实验证明:运用该方法能得到高速公路岩土边坡支护结构内摩擦角、粘聚力、横向地震加速度、最大震动系数对支护结构力学参数的分析,准确性较高。
When analyzing the physical characteristics of the rock-slope support structure of the expressway,the stability of the rock-soil slope is affected by various factors,which results in the calculated mechanical parameters and actual parameters are inconsistent,making it difficult to make an accurate analysis.Aiming at this situation,the seismic dynamic finite element analysis method of the rock slope support structure is proposed.The finite element model of the rock-slope support structure of expressway is constructed by using finite element analysis software.The seismic wave is input and the force and deformation of the slope support structure are observed.According to the pseudo-dynamic method,the seismic wave propagation is simulated,and the influence of the damping force of the longitudinal wave and the transverse wave from the foot to the top of the slope on the seismic wave is fully considered to obtain the seismic action.Under the dynamic response law,the mechanical parameters under vibration are obtained.The experiment proves that the method can obtain the internal friction angle,cohesion force,lateral seismic acceleration and maximum vibration coefficient of the rock-soil slope support structure of the expressway to analyze the mechanical parameters of the supporting structure with high accuracy.
作者
张艳奇
杨建桥
彭明兴
张家明
ZHANG Yanqi;YANG Jianqiao;PENG Mingxing;ZHANG Jiaming(Yunnan Land and Resources Vocational College,Kunming,Yunnan 652501,China;School of Architecture Engineering,Kunming University of Science and Technology,Kunming,Yunnan 652501,China)
出处
《公路工程》
北大核心
2019年第1期111-114,139,共5页
Highway Engineering
基金
云南省教育厅科学研究基金项目(2015Y605)
关键词
支护结构
最大震动
力学参数测试
有限元
support structure
maximum vibration
mechanical parameter test
finite element
