碾压混凝土重力坝动力模型试验及数值模拟分析

发布时间：2018-03-20 08:27

本文选题：仿真混凝土材料　切入点：动力模型试验　出处：《大连理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：我国的能源需求量巨大,水电作为一项清洁能源,越来越被国家所重视,随着国家制定发展规划以来,更多的水利项目处于规划或正在建设中。西南地区作为我国大部分水能资源的蕴藏地,有较多的水利项目在此展开,越来越多的重力坝兴建起来。这些大坝从几十米甚至达到几百米,在刷新国内外重力坝记录的同时给周边地区带来了极大的经济效益,并且在满足附近省市的基础上通过国家兴建的电能输送网络送到京沪穗等等人口密集的大型城市或者区域。对于重力坝周围的人民以及财产安全也提出了越来越多的需求。在这样的背景下,包括重力坝在内的一批大型坝体安全性项目受到越来越多人的关注。相关学者对于重力坝的研究也从未止步。特别是在地震等自然因素下的破坏,作为一项巨大的破坏源,一旦重力坝地震时发生溃坝,后果将不堪设想。论文结合某水电工程碾压混凝土重力的抗震措施开展了以下几项工作：研究了相似关系的推导以及转换,在原有相似关系的基础上,通过确定相似条件,确立相似关系,为模型试验在理论上提供支持。研究了仿真混凝土特性,通过材料实验确定仿真混凝土材料动、静力特性,并通过调整实验配比,使仿真混凝土大部分材料特性指标达到模型试验要求。并提取相关参数作为数值计算中模型本构。重力坝配筋的材料实验、模拟层面试验,模拟了坝体配筋及层面效果；进行挡水坝段、底孔坝段、溢流坝段若干组动力模型试验。通过不同工况下重力坝的动力模型试验对坝体破坏位置以及破坏形式进行研究,与上次所做实验进行对比分析,得到不同配筋对于坝体抗震效果的影响。通过有限元软件ABAQUS对坝体及附属结构进行建模并进行非线性破坏分析,与模型试验结果比照,对坝体损伤得到更全面的研究。
[Abstract]:China's energy demand is huge, hydropower as a clean energy, is paid more and more attention by the state, since the national development planning, more water conservancy projects in the planning or under construction. As most of the southwest reserves of hydropower resources in our country, there are more water projects in the dam, more and more these dams are built. From tens of meters or even hundreds of meters, has brought great economic benefits to the surrounding areas in the domestic and foreign record refresh dam at the same time, and meet the nearby provinces through the national construction of the power transmission network to the Beijing Shanghai and Guangzhou, a large city with a dense population or area. For the gravity dam around people and property safety are also put forward more and more requirements. In this context, including a number of large dam, dam safety project by More and more people's attention. Some scholars research for gravity dam has never stopped. Especially in the earthquake and other natural factors of the failure, as a great source of damage, once the earthquake occurs when the dam dam, the consequences will be unbearable to contemplate. Combined with the seismic measures of a hydropower project of RCC gravity to carry out the following work: a study of similarity between the derivation and conversion, based on the original similarity relation, by determining the similarity conditions, establish the similarity relation, model tests support in theory. The simulation research provides concrete characteristics, determined by material experiment simulation of concrete material, static characteristics, and by adjusting the experimental ratio, the simulation of concrete most of the material characteristics indicators meet the requirements of model test. And extract relevant parameters as the numerical constitutive model of gravity dam reinforcement material experiment, The level of simulation test, simulation of dam reinforcement and the level of effect; retaining dam, dam section of spillway section, several groups of dynamic model test. The dynamic model test under different conditions of dam dam damage location and damage types, and the last experiment were analyzed, effects of different reinforcement for earthquake the effect of the dam. Through the finite element software ABAQUS on the dam and accessory structure modeling and nonlinear failure analysis, and model test results comparison, get a more comprehensive study on the dam damage.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV642

【引证文献】