水利水电科技进展2024，Vol.44Issue(1)：60-65,72,7.DOI:10.3880/j.issn.1006-7647.2024.01.009
考虑结构与加锚岩体联合受力的船闸闸首抗震性能研究
Study on seismic performance of a lock head considering combined force of structure and anchored rock mass
摘要
Abstract
To study the influence of nonlinear contact between structure and anchored rock mass on the seismic performance of a lock head under earthquake,taking the first stage lock head of a double-line five-stage ship lock as an example,a three-dimensional finite element model for the dynamic interaction of reservoir water-structure-anchor-bedrock was established in the finite element software ADINA.The various contact problems in the lock head structure were simulated by the nonlinear contact elements based on constraint function.The dynamic responses of the lock head structure,the distribution law of the anchor force,and the contact state of different contact surfaces under the design earthquake were analyzed by time-history analytical method.The results show that the piers on each side of the lock head are deformed to the side of the navigation channel under the design earthquake,and the displacement increases along the height direction.The maximum axial tensile stress of the anchor is less than its tensile strength.The upper parts of the contact surfaces between different contact pairs are repeatedly opening and closing.The maximum opening of the contact surface increases with elevation.At the end of the earthquake,the contact surface is restored to the state before earthquake.Therefore,the structural deformation,structural stress,anchor stress and contact surface contact state of the lock head all meet specification requirements under the design earthquake with good seismic capacity.关键词
船闸闸首/接触单元/锚杆/动力响应/抗震性能/非线性有限元Key words
lock head/contact elements/anchors/dynamic response/seismic performance/nonlinear finite element分类
建筑与水利引用本文复制引用
熊梦琪,李亚军,陈小虎,张汉云,蒋才..考虑结构与加锚岩体联合受力的船闸闸首抗震性能研究[J].水利水电科技进展,2024,44(1):60-65,72,7.基金项目
国家自然科学基金项目(51709090) （51709090）
江苏省自然科学基金项目(BK20170884) （BK20170884）
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) （IWHR-ENGI-202303）
