摘要
Abstract
Lawa Concrete Face Rockfili Dam is located in the strong earthquake region with basic intensity Ⅷ of the Upper Jinshajiang River.In order to calculate the ultimate seismic capacity of the dam,the indexes,such as seismic residual deformation of the rockfill body,dynamic stability of the dam slope,stress of the face slab,void under the face slab,etc.,are adopted for studying the dam seismic dynamic responses of various response spectra,i.e.the standard response spectrum,the consistent probability response spectrum at the dam site and the setting seismic response spectrum under various peak accelerations.The result shows that under the same response spectrum,the dam dynamic response increases along with the increase of the peak acceleration,while the dam dynamic response presents a larger difference under the same peak acceleration with different response spectrum.Under the consistent probability response spectrum,the acceleration response of the dam,the void under the face slab,the seismic residual deformation of the rockfill body and the sliding of the downstream slope are all obviously larger than those under both the standard response spectrum and the setting seismic response spectrum,while the dam dynamic response under the setting seismic response spectrum is a little bit higher than that under the standard response spectrum.Combined with the generation mode of the spectrum,the setting seismic response spectrum is better to be selected for assessing the ultimate seismic capacity of Lawa Concrete Face Rockfill Dam.The calculated ultimate seismic capacity of the dam is 0.55g ～ 0.6g.关键词
堆石坝/地震/永久变形/面板脱空/坝坡稳定/大坝安全Key words
concrete face rockfill dam/earthquake/permanent deformation/void under face slab/stability of dam slope/dam safety分类
建筑与水利
