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首页> 外文会议>The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)论文集 >Effects of Concrete Fatigue Damage on Safety of Engineering Structure
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Effects of Concrete Fatigue Damage on Safety of Engineering Structure

机译：混凝土疲劳损伤对工程结构安全性的影响

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摘要

Interracial fatigue is one of the main modes for damage of engineering structure. And concrete fatigue affects the extent of interracial fatigue. Based on the shear-lag model and by the aid of Paris formula, the relationship between the interracial fatigue crack growth rate and the number of cyclic loading, as well as the relationship between the interracial coefficient of friction and the number of cyclic loading are established in the debonded region. Considered the degradation of the concrete properties under the fatigue loading, the interracial fatigue properties of reinforeed concrete under tension-tension cyclic loading are investigated. The effects of concrete fatigue on interracial fatigue are analyzed, and some available results of interracial fatigue are obtained under the degradation of concrete modulus. That is, the degradation of concrete consumes part energy, and it will make the interracial debonding rate lower, which is positive effect to some extent. It provides scientific base for engineering safety evaluation of RC structure.
机译：异族疲劳是破坏工程结构的主要方式之一。混凝土疲劳会影响跨种族疲劳的程度。基于剪切滞后模型，借助Paris公式，建立了界面疲劳裂纹扩展速率与循环载荷次数之间的关系，以及界面摩擦系数与循环载荷次数之间的关系。在脱胶地区。考虑到疲劳荷载作用下混凝土性能的下降，研究了钢筋混凝土在拉-拉循环荷载作用下的界面疲劳性能。分析了混凝土疲劳对界面疲劳的影响，并在混凝土模量降低的情况下获得了一些有用的界面疲劳结果。也就是说，混凝土的降解消耗了一部分能量，这将使异族脱胶率降低，这在一定程度上是积极的作用。为钢筋混凝土结构的工程安全评价提供了科学依据。

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