论文部分内容阅读
本文提出部分预应力轻骨料混凝土受弯构件在使用阶段的变形曲线符合双直线模式。并通过理论推导和试验分析给出了此类构件在两直线段内的短期刚度计算公式。文中对影响弹塑性分刚度B的因素进行了分析,提出B的表达式为B=cE_cI_0。给出了以折减系数D表示的总刚度计算公式。通过国内39根试验梁88个测点的验算表明,理论值与试验值符合较好。本公式具有物理概念明确、计算简便、且与近年国内的科研成果有较好的衔接等优点。
This paper proposes that the deformation curve of partially prestressed lightweight aggregate concrete flexural members in the use phase conforms to the double-line model. And through the theoretical derivation and experimental analysis, the short-term stiffness formula of such components in two straight sections is given. In this paper, the factors that affect the elasto-plastic stiffness B are analyzed, and the expression of B is B=cE_cI_0. The formula for calculating the total stiffness represented by the reduction factor D is given. The calculation of 88 test points of 39 test beams in China shows that the theoretical values are in good agreement with the test values. This formula has the advantages of a clear physical concept, easy calculation, and good connection with domestic scientific research achievements in recent years.