新型泥石流拦挡坝的抗冲击性能  

Impact resistance of novel blocking dam of debris flow

作　　者：王秀丽[1,2] 吕志刚[1,2] 李俊杰[1,2] 周锟[1,2] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2015年第4期135-138,共4页Journal of Lanzhou University of Technology

基　　金：国家科技支撑计划项目(2011BAK12B07);国家自然科学基金(51278236)

摘　　要：为解决泥石流拦挡坝在大块石冲击作用下容易破坏的问题,提出一种由前部钢架、中间弹簧、后部混凝土坝体组成的弹簧格构泥石流拦挡坝.应用有限元分析软件LS-DYNA对新型坝和普通重力式拦挡坝进行对比分析,得到坝体的应力分布情况及冲击力、位移的时程曲线.结果表明,新型坝较普通坝有优越的抗冲击性能,新型坝后坝的应力分布比普通坝更均匀且应力水平明显降低,弹簧格构坝的冲击力、位移较普通坝有显著降低.In order to solve the problem that the blocking dam of debris flow is easy to be destroyed by the impact of massive rocks, a novel spring lattice blocking dam of debris flow is proposed, which is consists of front steel frame, middle spring, and rear concrete dam. This novel blocking dam is compared and analyzed with ordinary gravity blocking dam by using finite element analysis software LS-DYNA. The stress distribution and time history curve of impact and displacement of the dams are obtained. The results show that the new dam has superior impact resistance and its stress distribution is more homogeneous than ordi- nary gravity dam. The impact force and displacement of the spring lattice dam is much smaller than the ordinary dam.

关 键 词：新型泥石流拦挡坝 大块石 抗冲击性能 数值模拟 LS-DYNA 

分 类 号：TU359[建筑科学—结构工程]