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基于温度应力仿真分析的碾压混凝土重力坝诱导缝开裂研究
引用本文:周伟,常晓林,刘杏红,范五一,丁福珍.基于温度应力仿真分析的碾压混凝土重力坝诱导缝开裂研究[J].岩石力学与工程学报,2006,25(1):122-127.
作者姓名:周伟  常晓林  刘杏红  范五一  丁福珍
作者单位:1. 武汉大学,水利水电学院水资源与水电工程科学国家重点实验室,湖北,武汉,430072
2. 长江水利委员会,长江勘测规划设计研究院,湖北,武汉,430010
摘    要:考虑彭水水电站碾压混凝土坝的实际碾压浇筑过程,采用混凝土钝裂缝带模型,在三维瞬态有限元温度应力仿真分析的基础上,对大坝诱导缝的开裂及裂缝扩展进行了跟踪计算。计算结果表明,坝体的上游面诱导缝缝端应力强度因子局部超过混凝土的断裂韧度而发生开裂,且诱导缝的开裂明显减小了坝段中部区域的拉应力。根据诱导缝的开裂分析结果,建议诱导缝的设置长度为4.5m。

关 键 词:水利工程  碾压混凝土重力坝  诱导缝  温度仿真  钝裂缝带模型
文章编号:1000-6915(2006)01-0122-06
收稿时间:2004-10-14
修稿时间:2004-10-142004-12-16

STUDY ON SLIT AND TRANSVERSE JOINT OF ROLLER COMPACTED CONCRETE GRAVITY DAM BASED ON TEMPERATURE STRESS SIMULATION ANALYSIS
ZHOU Wei,CHANG Xiao-lin,LIU Xing-hong,FAN Wu-yi,DING Fu-zhen.STUDY ON SLIT AND TRANSVERSE JOINT OF ROLLER COMPACTED CONCRETE GRAVITY DAM BASED ON TEMPERATURE STRESS SIMULATION ANALYSIS[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(1):122-127.
Authors:ZHOU Wei  CHANG Xiao-lin  LIU Xing-hong  FAN Wu-yi  DING Fu-zhen
Affiliation:1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China; 2. Changjiang Institute of Survey Planning Design and Research, Changjiang Water Resources Commission, Wuhan, Hubei 430010, China
Abstract:Considering the true construction process of Pengshui Hydropower Station roller compacted concrete(RCC) gravity dam and adopting the blunt crack band model of concrete,transient finite element is applied to simulating layer-by-layer construction process to get the temperature field and stress field from construction period to operating period.Then crack and propagation of the dam-induced slits are computed by dynamic tracking method.The simulating analytical results of the whole dam show if induced of slit tip stress intensity factors exceed tensile bearing capacity of concrete on upstream face,and induced crack occurs.The crack of induced slit leads to tensile stress release near slit.The length of the induced slit of Pengshui Hydropower Station dam is suggested to 4.5 m on the basis of the cracking analytical result.
Keywords:hydraulic engineering  roller compacted concrete(RCC) gravity dam  induced slit  temperature simulation  blunt crack band model  
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