摘要
混凝土结构疲劳破坏是实际工程中主要存在的一个问题,它的疲劳破坏机理比静力承载能力的破坏机理复杂,而且影响因素较多,大量实验数据显示,混凝土结构的疲劳强度是随机的,需运用概率理论和可靠度理论相结合对其进行分析。本文基于随机有限元法,利用ANSYS有限元分析软件,以混凝土重力坝在低周地震荷载工况为例建立三维有限元模型,进行随机疲劳可靠度分析,计算结果表明:采用剩余强度衰减模型进行疲劳可靠性分析在工程结构抗疲劳设计中具有适用性。
concrete structure fatigue damage is a main problem in a project, the meohanism of fatigue damage is much more complex than that of the static bearing capacity. Many experimental data displays that fatigue strength of concrete structure is random, which should be analysesed by both the probability theory and reliability theory. Based on the stochastic finite element method, this paper uses ANSYS finite element analysis software and take the concrete gravity dam under low frequency seismic load as an example to establish 3D finite element model and analyses its random fatigue reliability. The calculation results show that the residual strength degradation model for fatigue reliability analysis is applicable in the anti-fatigue design of engineering structures.
出处
《湖南工业职业技术学院学报》
2012年第4期38-40,共3页
Journal of Hunan Industry Polytechnic
