冲击荷载下梳齿坝支墩厚度对支墩受力特性的影响分析

Effect Analysis of the Thickness of the Comb Dam's Buttress on the Mechanical Characteristicsunder Impact Load

梳齿坝是由坝体支墩、基础及两侧翼墙组成的泥石流拦挡坝,由于受力分析方面的研究很少,目前缺乏完善的设计规范和计算理论。采用有限元软件ANSYS进行数值模拟,对冲击荷载下不同厚度梳齿坝支墩的受力特性进行分析,结果表明,冲击荷载下,随着支墩厚度増大,呈支墩位移减小、墩身弯矩増大的趋势,大石块冲击力是造成结构破坏的主要原因。该结果可为梳齿坝设计提供参考。

The comb dam is a kind of debris flow block dam,which is composed of buttress,foundation and the two side walls.Currently,there is no perfect design code and computation theory due to few studies on stress analysis.A numerical simulation was carried out in this paper by using finite element software,ANSYS,to analyze the characteristics of the impact load under different thickness of abutment teeth.Studies have shown that under impact load,thicker buttress makes its displacement smaller and its moment bigger,and the main cause of structural damage is the impact of large stones.The result provides a reference for the design of the comb dam.