全长粘结型锚索地震作用下动力响应规律研究  

Research on Dynamic Response of Full-length Adhesive Anchor Cable Under Seismic Action

作　　者：吴昕阳 赵宇飞[1,2] 宫晓辉 孟涛 朱浩天 WU Xin-yang;ZHAO Yu-fei;GONG Xiao-hui;MENG Tao;ZHU Hao-tian(China Institute of Water Resources and Hydropower Research,Beijing 100048,China;Key Laboratory of Water Engineering Construction and Safety,Ministry of Water Resources,Beijing 100048,China;Xinjiang Xinhua Yarkant River Water Conservancy and Hydropower Development Co.,LTD.,Kashgar 844099,China)

机构地区：[1]中国水利水电科学研究院,北京100048 [2]水利部水工程建设与安全重点实验室,北京100048 [3]新疆新华叶尔羌河流域水利水电开发有限公司,新疆喀什844099

出　　处：《水电能源科学》2024年第12期87-91,共5页Water Resources and Power

基　　金：国家重点研发计划(2023YFC3007005)。

摘　　要：全长粘结型预应力锚索目前是边坡支护中最常见的加固措施,但在地震荷载作用下,其支护作用的发挥及动力响应机制与规律均还不够明确。基于前期开展的预应力锚固边坡离心模型试验,根据模型试验尺寸、边界条件、动力输入等特征,建立数值仿真模型开展全长粘结型锚索动力响应规律研究。对比数值仿真结果与离心模型试验成果,分析了锚固边坡不同位置锚索、锚索不同部位在地震加速度作用下的变形、应力响应特征与规律,在此基础上进一步揭示了全长粘结型预应力锚索在动力条件下的阻滑作用机制与动力响应规律。研究成果对高地震烈度场地边坡的预应力锚索加固及地震工况下全长粘结型锚索的安全评价有重要的参考价值。Full-length adhesive prestressed anchor cables are currently the most common reinforcement measure for slope support,but the mechanism and laws of their support and dynamic response under seismic loading are not yet clear.Aiming at this problem,a numerical simulation model was established based on the centrifugal model test to research the dynamic response characteristics of full-length adhesive anchor cable in detail.The model was established by taking into account the dimensions,boundary conditions,and dynamic input characteristics.Through the comparison and analysis of numerical simulation results and centrifugal model test results,the deformation and stress response characteristics and laws of anchor cables at different positions of the anchored slope and different parts of the anchor cable under the action of seismic acceleration were expounded.The anti-sliding mechanism and dynamic response law of the full-length cohesive prestressed anchor cable under dynamic conditions were further revealed.The research results have important reference value for the prestressed anchor cable reinforcement of high seismic intensity slope and the safety evaluation of full-length adhesive prestressed anchor cable under seismic conditions.

关 键 词：预应力锚索 全长粘结型 地震作用 动力响应规律 数值仿真 

分 类 号：TV223[水利工程—水工结构工程]