摘要
为探究地震作用下基岩与结构的动力相互作用对塔体抗震性能的影响,以某泄洪洞进水塔为工程背景,建立了塔体-基岩相互作用的整体有限元模型,基于共节点、接触单元、接触单元加锚杆3种不同连接方式模拟塔体-基岩的相互作用,系统对比分析了3种工况下结构的自振特性、地震动力响应特性、接触状态、锚杆轴向应力分布及抗震稳定性。研究表明,不同的塔背-基岩连接模拟方法对进水塔地震动力响应影响显著。共节点的强约束使塔体与基岩的交界处容易产生应力集中,采用接触单元模拟塔背与基岩的连接能合理的反映结构与基岩的动力相互作用,加锚杆工况从变形、应力和抗震稳定性方面均对进水塔的抗震性能有显著提高。
To investigate the influence of dynamic interaction between bedrock and structure on the seismic performance of tower structures under earthquake action,a spillway tunnel intake tower is taken as the engineering background,and an integrated finite element model of tower-bedrock interaction is established.Three different connection methods are employed to simulate the tower-bedrock interaction,including common node,contact element,and contact element with anchor bolts.The natural vibration characteristics,seismic dynamic response characteristics,contact states,axial stress distribution of anchor bolts,and seismic stability of the structure under three working conditions are analyzed and compared.The results indicate that different simulation methods for tower-bedrock connection have significant effects on the seismic dynamic response of the intake tower.The strong constraint of common nodes tends to cause stress concentration at the interface between the tower and bedrock.Using contact elements to simulate the connection between the tower back and bedrock can reasonably reflect the dynamic interaction between the structure and bedrock.The arrangement of anchor bolts can significantly improve the seismic performance of the intake tower in terms of deformation,stress,and seismic stability.
作者
林润丰
张汉云
李潇寒
张颖
LIN Runfeng;ZHANG Hanyun;LI Xiaohan;ZHANG Ying(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,Jiangsu,China)
出处
《水力发电》
2026年第4期46-51,68,共7页
Water Power
基金
国家自然科学基金面上项目(524791220)
中国水利水电科学研究院水利部水工程建设与安全重点实验室项目(IWHR-ENGI-202303)。
关键词
进水塔
抗震性能
相互作用
接触非线性
锚杆加固
intake tower
seismic performance
interaction
contact nonlinearity
anchor rod reinforcement
