摘要
为深化模糊随机损伤力学研究,基于自适应模糊随机损伤力学模型,对材料裂纹尖端广义损伤应力场进行分析,证实了数值模型的可靠性。以碾压混凝土重力坝为例,并考虑材料参数空间变异,就模糊随机损伤增益下的宏观场分布做敏感性研究,结果表明,碾压混凝土抗压强度极限值是影响大坝安全的主控指标。采用不同模糊分布对自适应损伤力学模型做激励分析,揭示了各分布对混凝土及岩石类材料广义损伤场演化的控制特征。
Based on fuzzy self-adapting stochastic damage model,the characteristics of generalized damage stress field on material crack tip are studied.The results express that the numerical algorithm is reliable.Sensitivity of rolled-concrete gravity dam under fuzzy-stochastic damage gaining is implemented by considering the spatial variation of material parameters.It is found that the compression strength of rolled-concrete is the governing index on gravity dam reliability.The activation simulations on fuzzy self-adapting stochastic damage model were carried by adopting different fuzzy distributions,which indicated the governing characteristics of the distribution on generalized damage evolution of rock-like material.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第1期77-86,共10页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金资助项目(50379046)
教育部博士点基金资助项目(A50221)
关键词
碾压混凝土重力坝
模糊激励
模糊随机损伤模型
敏感性
rolled-concrete gravity dam
fuzzy activation simulation
fuzzy self-adapting stochastic damage model
sensitivity
