摘要
混凝土结构在服役过程中会受到复杂的环境与荷载作用,这些复杂荷载作用会使结构产生损伤,不仅会引起结构的内力重分布,还会导致结构构件的抗力性能劣化,增大结构的长期变形,带来一系列结构安全问题。现有关于混凝土结构长期变形的研究,大多以徐变为主要考察对象,较少考虑其他环境及荷载作用,对耦合作用下不同损伤的混凝土结构的长期变形规律、力学性能退化研究尚不充分。为此,梳理了损伤混凝土结构长期变形的相关研究,分别对环境侵蚀作用、循环荷载作用与复杂荷载作用下,混凝土结构的长期变形与力学性能研究进行了分析与评价,最后提出需要完善的内容和发展趋势。
Concrete structures will be subjected to complex environmental and loading effects during service,and these complex effects will cause damage to the structure,which will not only cause the internal force redistribution of the structure,but also lead to the deterioration of the structural member’s resistance performance,increase the long-term deformation of the structure,and bring a series of structural safety problems.Most of the existing studies on the long-term deformation of concrete structures mainly focus on the creep as the main object of investigation,with less consideration of other environmental and loading effects,and the long-term deformation law and mechanical property degradation of concrete structures with different damages under the coupling effect have not been adequately investigated.The relevant research on long-term deformation of damaged concrete structures was analyzed,and the long-term deformation and mechanical properties of concrete structures under environmental erosion,cyclic loading and complex loading effects were evaluated.Finally,the contents and development trends that need to be improved were proposed.
作者
金伟良
郭豪
张怡雪
JIN Weiliang;GUO Hao;ZHANG Yixue(Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China)
出处
《建筑结构》
北大核心
2024年第19期135-146,134,共13页
Building Structure
基金
国家自然科学基金(51820105012、52478216)。
关键词
混凝土结构
损伤
徐变效应
长期变形
力学性能
concrete structure
damage
creep effect
long-term deformation
mechanical property
