摘要
对国内外四种轻骨料混凝土应力—应变曲线方程进行了分析、比较,结合相关试验结果,提出了分段式方程。上升段表达式和现行《轻骨料混凝土结构技术规程》(JGJ12-2006)一致,下降段采用有理分式,方程中唯一的常数B可由关键点坐标确定,并给出了关键点坐标和峰值应力之间的关系表达式。该方程形式简单,能够完整、准确地反映曲线下降段的应力—应变关系,可为轻骨料混凝土结构非线性分析提供参考依据。
Four different equations of stress-strain curves were compared and analyzed, then, new sectional equations are provided according to the related test results. The ascending equation is identical with the present 《Technical Specification for Lightweight Aggregate Concrete Structures》（JGJ12-2006）,the descending equation is a rational function in which the sole constant B can be evaluated from the key points. The coordinates of the key points are expressed in function of the compressive strength of concrete. The sectional equations are simple and the descending equation can perfectly reflect the descending stress-strain relationships so as to offer reference basis to nonlinear analysis of lightweight concrete structures.
出处
《建筑科学》
北大核心
2008年第11期83-85,59,共4页
Building Science
关键词
轻骨料混凝土
应力-应变曲线
关键点
lightweight aggregate concrete
stress-strain relationships
key points
