水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2015年
4期
60-65
,共6页
弹塑性分析%碾压混凝土坝%淤积物%坝体-基岩交界面
彈塑性分析%碾壓混凝土壩%淤積物%壩體-基巖交界麵
탄소성분석%년압혼응토패%어적물%패체-기암교계면
elasto-plastic analysis%roller compacted concrete dams%sediments%dam-foundation dynamic inter-face
以碾压混凝土重力坝为对象，开展了水平地震动作用下库底淤沙层对大坝动力响应影响的研究。将坝体碾压混凝土和基岩材料模拟为Drucker－Prager弹塑性材料，考虑碾压混凝土大坝层面和坝体－基岩交界面处的不连续非线性行为，采用相关流动法则和Lagrangian流体单元，考虑弹性地基，库水以及水库底部沉积物等不同材料介质间的相互作用，对有无沉积物和不同沉积物高度情形的碾压混凝土大坝进行了动力反应分析。分析结果表明，地震作用下库底淤沙层对碾压混凝土重力坝动力特性有着一定的影响，地震动作用下碾压混凝土大坝的弹塑性分析应适当考虑淤积层的影响。
以碾壓混凝土重力壩為對象，開展瞭水平地震動作用下庫底淤沙層對大壩動力響應影響的研究。將壩體碾壓混凝土和基巖材料模擬為Drucker－Prager彈塑性材料，攷慮碾壓混凝土大壩層麵和壩體－基巖交界麵處的不連續非線性行為，採用相關流動法則和Lagrangian流體單元，攷慮彈性地基，庫水以及水庫底部沉積物等不同材料介質間的相互作用，對有無沉積物和不同沉積物高度情形的碾壓混凝土大壩進行瞭動力反應分析。分析結果錶明，地震作用下庫底淤沙層對碾壓混凝土重力壩動力特性有著一定的影響，地震動作用下碾壓混凝土大壩的彈塑性分析應適噹攷慮淤積層的影響。
이년압혼응토중력패위대상，개전료수평지진동작용하고저어사층대대패동력향응영향적연구。장패체년압혼응토화기암재료모의위Drucker－Prager탄소성재료，고필년압혼응토대패층면화패체－기암교계면처적불련속비선성행위，채용상관류동법칙화Lagrangian류체단원，고필탄성지기，고수이급수고저부침적물등불동재료개질간적상호작용，대유무침적물화불동침적물고도정형적년압혼응토대패진행료동력반응분석。분석결과표명，지진작용하고저어사층대년압혼응토중력패동력특성유착일정적영향，지진동작용하년압혼응토대패적탄소성분석응괄당고필어적층적영향。
The sediments at the bottom of reservoirs have a great impact on the seismic response of the concrete dam above .Due to this ,the effects of the sediments on nonlinear dynamic response of roller compacted concrete (RCC ) dams were investigated .The nonlinear behavior of the dam concrete and rock was idealized as elasto-plastic using the Drucker-Prager model based on the associated flow rule assumption .Special emphasis was given to the non-linear behaviour of discontinuities along RCC interfaces and dam-bedding rock foundation . The interactions between flexible foundations , reservoir water ,and bottom reservoir sediments were represented by related flow rule and Lagrangian fluid units .The re-sults obtained from nonlinear analyses for different sediments levels were compared with each other .It is apparent that the sediments effects must be considered in the elasto-plastic analyses of RCC dams under earthquake ground motion .
