摘要
利用自制的混凝土三轴试验系统，通过１２７块试件，对国内尚未研究、国外也较少开展的轻骨料混凝土在常规三轴及真三轴状态下（包括两轴拉及三轴拉状态下）的变形特性进行了试验研究；分析了应力－应变关系的特点，并与普通混凝土三轴状态下的特性进行了比较，发现了轻骨料混凝土在三向高压应力比下其应力－应变曲线具有明显的平台流塑特性；讨论了中间应力对峰值应变的影响以及轻骨料混凝土体积应变规律，为建立轻骨料混凝土的本构关系和结构设计提供了依据．
One hundred and twenty seven specimens of lightweight concrete for true triaxialcompression,triaxial tension,triaxial compression-tension were tested with concrete triaxialapparatus designed by the authors.This research work has not been reported until now in theliterature at home and abroad.The deformation and stress-strain curves are analyzed andcompared with that of normal concrete.It is found that the stress-strain curve of lightweightconcrete under high triaxial compressive stresses has an obvious plastic flow plateau.Theinfluence of intermediate principal stress on the strain corresponding to the peak stress is alsoanalyzed.The stress-volume strain relationship is described.The test and analysis results oflightweight concrete give important data for establishing constitutive relationship and structuredesign.
出处
《大连理工大学学报》
CAS
CSCD
北大核心
1994年第3期344-351,共8页
Journal of Dalian University of Technology
基金
国家自然科学基金
建设部科学基金
关键词
轻骨料
混凝土
变形
三轴应力
light-weight aggregate
concrete
deformation/triaxial stress state
