摘要
利用Midas GTS有限元软件建立尾矿坝三维模型,并且基于M_C准则及有限元强度折减法对尾矿坝进行静力稳定性评价分析,采用整体位移和安全系数两个指标评价尾矿坝的稳定性。有限元强度折减法避免了极限平衡理论评价尾矿坝稳定性时将土体视为刚体的缺陷,使结果更为精确可靠。采用反应谱和时程分析法对对尾矿坝进行动力稳定分析。反应谱法考虑了土体的弹塑性结构和坝体结构的动力特性,避免了拟静力法无法考虑结构动力特性反应所带来的不精确性;时程分析法既能考虑地震持续时间对尾矿坝地震效应的影响,同时也能计算能量的损耗和考虑坝体的非线性结构,本文通过对两种方法的计算结果作对比分析得出反应谱理论的局限性。从多角度多方法进行尾矿坝的稳定分析评价,才能确保人民生命财产安全,更有效率地发展国民经济。
The Midas GTS finite element software was used to build the 3D model of tailings dam, and the stability of the tailings dam is analyzed by the finite element strength reduction method based on the M_C criterion. The stability of the tailings dam is evaluated by the whole displacement and the safety factor.The finite element strength reduction avoids the defects that caused by the limit equilibrium theory evaluated stability of tailings dam, make the results more accurate and reliable. Analyzing the dynamic stability of the tailings dam by the response spectrum method and Time history analysis. The response spectrum method takes into account the elasto-plastic structure of the soil and the dynamic characteristics of the dam structure, which avoids the imprecisions caused by the quasi-static method can not takes into account the dynamic characteristics of the structure. The time history method can not only consider the effect of earthquake duration on the seismic effect of the tailings dam, but also can calculate the energy loss and consider the nonlinear structure of the tailings dam. The paper revealed that the limitations of the response spectrum theory by comparing the results of the two methods. Evaluating the stability of the tailings dam from a multi-angle and a multi-method, which can ensure the safety of people＇s lives and property, and develop the national economy efficiently.
出处
《价值工程》
2017年第15期91-94,共4页
Value Engineering
关键词
尾矿坝
强度折减法
反应谱理论
时程分析法
稳定性
tailing dam
strength reduction method
response spectrum theory
time history analysis method
stability
