【摘要】 斜坡的坡体结构是控制斜坡变形破坏模式、影响斜坡动力特性的重要因素。为了进一步了解"坡体结构面如何影响边坡地震动力响应规律"这一问题,对均质斜坡(无结构面)和水平层状岩质斜坡(含水平结构面)两种类型的岩质斜坡进行了大型振动台试验研究,并着重对比分析了有无结构面对岩质斜坡峰值加速度动力响应规律的影响。研究结果表明:水平层状斜坡坡表和坡内加速度动力响应基本上都大于均质斜坡,即水平层状岩质斜坡存在层面放大作用,但水平结构面对斜坡加速度动力响应放大作用的程度与地震波类型、频率、振动强度和激振方向有关,总的来说,水平层面对Z向地震波的放大作用大于对X向地震波;在本试验研究中,频率仅影响层面放大系数量值的变化,而地震波类型及其振动强度和激振方向则对其分布形式和量值均有显著影响。更多还原

【Abstract】 The slope structure is an important factor controlling the slope deformation failure mode and influencing the dynamic characteristics of the slope. In order to further understand the problem about " how the slope structural plane to affect the slope seismic dynamic response rules ",this paper conducts a large- scale shaking table test for the homogeneous slope( no structural plane) and horizontal layered rock slope( including horizontal structural plane),and focuses attention on the comparatively analysing for how the structural plane to influence dynamic response rules of the peak acceleration. The results of the study show that: acceleration dynamic response of the horizontal layered slope in the surface and the inner basically greater than that of homogeneous slope,it is said that Horizontal layered rock slope has amplification effect,but the amplification effect degree of the acceleration dynamic response in horizontal structure slope relates to seismic wave type,frequency,intensity of vibration and exciteol direction; In general,the amplification effect of horizontal plane on Z-direction seismic wave is more than that on X-direction seismic wave; In this test study,frequency only affectes the changes of the level amplification coefficient value,but seismic wave types,intensity of vibration and vibration direction affect distribution form and value significantly.更多还原