摘要
根据混凝土重力坝坝顶水平位移观测资料,采用逐步回归方法分离出了坝顶水平位移的水压分量;以大坝和基岩的弹性模量识别反问题作为优化问题,利用改进的遗传算法,并借助接触单元模拟坝体纵缝进行了有限元反演分析.某带缝重力坝数值计算实例表明,该计算方法能够较好地反映坝体结构的实际状况,参数反演分析计算效率高,计算结果与现场试验值及经验数据吻合较好,具有较高的合理性与可靠性.
Based on the monitoring data about the crest displacement of a gravity dam, the component of horizontal displacement caused by impounded water was separated by progressive regressive method. At the same time, an inverse problem about elastic parameter of dams and basic rocks identification using improved genetic algorithm was analyzed as an optimization problem. Also, during the inverse calculating process, contact elements were used to simulate the longitudinal joints of the dam. It is shown that the methods proposed are coincident better with the actual structure, and the results of the inverse analysis are reasonable and reliable in high degree.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2009年第2期261-266,共6页
Journal of Dalian University of Technology
关键词
重力坝
纵缝
接触单元
优化问题
遗传算法
反分析
gravity dam
longitudinal joints
contact elements
optimization problem
genetic algorithm
inverse analysis
