混凝土伏扶壁大坝受到强震时，容易在大坝高处形成裂缝，在那里下游坝面扶壁横贯垂直的“烟筒”部分。
Concrete buttress DAMS when subjected to severe shaking have developed horizontal cracks at the elevation high in the DAMS where the downstream buttresses intersect the vertical "chimney" section.
得出如下结论：大坝的自重和坝中上高程地基减弱是造成拱坝下游面最初发生纵向裂纹的主要原因；
The results shown that: weight and weak foundation close to middle-upper dam lead the vertical cracks to propagate along the downstream wall;
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