摘要
通过采用平面波和远场散射波混合透射的应力人工边界条件,得到了地震波斜入射的解析方式,以此为基础建立了地震波斜入射条件下,土体与地下结构动力相互作用的时域计算分析模型。以实际建设的南京地铁某车站结构为研究对象,应用大型通用有限元分析软件ANSYS,进行了地震波斜入射条件下地下结构时域地震反应的计算和分析。初步结果表明:在地震波斜入射的情况下,地下结构的动力反应与地震波垂直入射时有较为明显的差异。
In this paper, the time-domain calculating method for dynamic interaction between soil and underground structures object to obliquely incident seismic waves is developed based on the artificial boundary condition that adopts the planar waves and the scattered waves transmitting into the linear elastic infinite media through artificial boundary. Taking Nanjing metro as an example, the time-domain seismic response is calculated and analyzed using the finite element software ANSYS. The preliminary results show that under the action of obliquely incident seismic waves, the dynamic response of underground structures is clearly different from the dynamic response under the action of vertically incident seismic waves.
出处
《震灾防御技术》
2007年第3期290-296,共7页
Technology for Earthquake Disaster Prevention
基金
国家自然科学基金资助项目(50325826
50508002)
北京市教委科技创新平台建设项目--城市岩土与地下工程安全检测技术平台
关键词
地下结构
时域地震反应
斜入射
人工边界
Underground structure
Time-domain seismic response
Obliquely incident
Artificial boundary condition
