Experimental study on dynamic characteristics of debris flow dam with braces under impact loads
LI Jun-jie1,2, WANG Xiu-li1,2, ZHU Yan-peng1,2, LUO Wei-gang1,2,LIANG Ya-xiong1,2, WU Chang1,2
1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
Abstract：Debris flow dams can intercept solid matter which is contained by debris flow and cut down the flow and density of discharged debris flow, thus the damages of debris flow to the downstream are reduced, this class structure has been widely applied to prevention and control engineering of the debris flow disaster now. A kind of steel-concrete combined structure with steel braces was presented based on the conventional gravity dams, and the superiority of the new structure in terms of impact resistance was verified contrastively by means of model experiments under solid impact force on the conventional and new-style dams. The results indicate that braces have played roles in restraining cracks and reducing width, they effectively alleviate the extent of damage in impact areas. Compared with the conventional dam, the dynamic strains and acceleration peak values of the dam with braces both observably reduce, the highest reduction ranges of them may be up to 69.2% and 47.8% respectively, so the deformation and vibration are limited by the braces. The dynamic displacement peak values of the new-style dam are significantly less than the conventional dam, and the average reduction range of this index may reach to about 46%, so the structural stiffness has been enhanced by a large margin.
李俊杰1,2，王秀丽1,2，朱彦鹏1,2，罗维刚1,2，梁亚雄1,2，吴长1,2. 冲击荷载下带支撑泥石流拦挡坝动力特性试验研究[J]. 振动与冲击, 2015, 34(18): 79-86.
LI Jun-jie1,2, WANG Xiu-li1,2, ZHU Yan-peng1,2, LUO Wei-gang1,2,LIANG Ya-xiong1,2, WU Chang1,2 . Experimental study on dynamic characteristics of debris flow dam with braces under impact loads. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(18): 79-86.
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