三峡大学学报（自然科学版）2024，Vol.46Issue(1)：14-22,9.DOI:10.13393/j.cnki.issn.1672-948X.2024.01.003
地震波斜入射作用下重力坝地震响应分析
Seismic Response Analysis of Gravity Dam Under Oblique Incident Seismic Wave
摘要
Abstract
In order to study the seismic response of gravity dam under oblique incidence of seismic waves,based on the viscous-spring boundary and the corresponding ground motion input method,the equivalent seismic forces of P wave and SV wave with oblique incidence are derived respectively.The unified viscous-spring static-dynamic artificial boundary with oblique incidence of seismic wave is constructed.Taking the Huangdeng concrete dam as the research object,the dynamic response of concrete dam under reservoir water and seismic load at different oblique incidence angles of P wave and SV wave is studied.The horizontal and vertical relative displacement and principal stress of gravity dam during an earthquake are analyzed.The results show that there is a significant difference between P wave and SV wave in the seismic response of concrete gravity dam under oblique incident,therefore,it is necessary to consider the oblique incident of seismic wave.When P wave is incident at an oblique angle,the horizontal and vertical relative displacements and principal stress values of key points in the dam increase gradually as the incident angle increases(i.e.,they reach the maximum at 60°).When SV wave is incident at an oblique angle,the relative displacement of the key points and the principal stress of the dam body remain relatively stable as the angle increases.However,when the incident angle is 0°(i.e.,the vertical incident angle),compared with other incident angles,both the vertical and horizontal relative displacements and the principal stress at the key point of the dam body are at their maximums.关键词
黏弹性边界/斜入射/重力坝/地震响应/地震动输入Key words
viscous-spring boundary/oblique incidence/gravity dam/seismic response/ground motion input分类
建筑与水利引用本文复制引用
陈灯红,曾怡阳,赵艺园,刘云龙,岳梦..地震波斜入射作用下重力坝地震响应分析[J].三峡大学学报（自然科学版）,2024,46(1):14-22,9.基金项目
国家自然科学基金项目(52079072) （52079072）
土木工程防灾减灾湖北省引智创新示范基地项目(2021EJD026) （2021EJD026）
