新型带弹簧支撑抗冲击研究及其在泥石流拦挡坝中的应用

为了使结构或构件能够更好地承受住泥石流、爆炸等冲击荷载,设计出一种新型带弹簧的支撑(件)。运用显式动力分析方法,对冲击载荷作用下的这种支撑进行数值模拟,计算得到新型支撑的动力响应,并与普通支撑进行对比分析。结果表明,新型支撑能更好地防止冲击荷载作用下的结构过早发生塑性变形。另外,在泥石流防治结构中,引入这种新型支撑,设计出新型泥石流拦挡坝。运用有限元软件ls-dyna对新型泥石流拦挡坝进行大块石冲击模拟,并与普通重力式拦挡坝进行对比分析,得出新型拦挡坝坝底应力远小于普通泥石流拦挡坝的应力。研究结果表明,新型带弹簧支撑及新型泥石流拦挡坝的抗冲击效果非常明显。

Study on Impact Resistance of New Support with Spring and Its Application in Debris Flow Dam

To make the structure or components able to bear better the impact load such as landslides,explosions,a new support with spring was designed.By using explicit dynamic analysis methods,such a support was simulated under impact loads,the dynamic response of the new support characteristics were calculated.A comparison was made between the characteristics of the new support and those of the general support.It was showed that the new support is more better on resisting plastic deformation of structure,under impact load.In addition,among the debris flow control structures,a new debris flow dam was designed by introducing this new type of support.It was simulated under boulder impact by using finite element software ls-dyna,and compared with ordinary gravity dam.It was observed that the bottom stress of the new debris flow dam is much smaller than that of the ordinary dam.The results show that the impact-resisting effect of new support with spring and new debris flow dam is very obvious.