地震作用下含反倾软弱夹层斜坡的动力变形破坏特征研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (19) : 134-139.

论文

地震作用下含反倾软弱夹层斜坡的动力变形破坏特征研究

杨峥1，许强1，刘汉香1，王龙2

作者信息 +

Study of dynamic deformation and failure of slope with an anti-dip weak interlayer under earthquakes

YANG Zheng1，XU Qiang1，LIU Han-xiang1，WANG Long2

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摘要

采用振动台模型试验，研究了地震作用下含反倾软弱夹层的斜坡的动力变形破坏特征和破坏过程。试验结果表明：（1）地震动作用下斜坡的变形和破坏特征与地震波类型、加载方向、振动强度有关，同时还与斜坡所含软弱夹层的厚度和坡体高程等因素有关。（2）含反倾软弱夹层的斜坡在地震动作用下为“震裂-散体崩落”型破坏，坡面裂缝起主要的控制作用，并且具有沿坡面裂缝呈带状散体崩落的特点。其变形破坏集中在坡体的中上部，这与坡面水平加速度在该部位被显著放大有关。（3）相比薄软弱夹层，厚软弱夹层在震动过程中表现出一定的消能、减震作用。

Abstract

The characteristics of dynamic deformation and failure process of the slopes with an anti-dip weak interlayer under earthquakes are studied by the shaking table model test. Test results show that: (1) The deformation and failure process of slopes under earthquakes are not only related to the types，loading direction and vibration intensity of the earthquake waves，but also related to the elevation of slopes and the thickness of weak interlayer. (2) The slopes with an anti-dip weak interlayer failed in the mode of “crack - shatter collapse” under earthquakes, having the characteristics of band-like collapse mainly controlled by the cracks on the surface of slopes. The deformation and failure concentrated mainly in the upper part of slopes, which is due to the significant amplification in that part. (3) Compared to the thin weak interlayer, the thick one plays an important role in energy dissipation and shock absorption during the shaking.

导出引用

杨峥;许强;刘汉香;王龙. 地震作用下含反倾软弱夹层斜坡的动力变形破坏特征研究[J]. 振动与冲击, 2014, 33(19): 134-139

YANG Zheng;XU Qiang;LIU Han-xiang;WANG Long. Study of dynamic deformation and failure of slope with an anti-dip weak interlayer under earthquakes[J]. Journal of Vibration and Shock, 2014, 33(19): 134-139