【摘要】 本文研究了影响无粘结部分预应力砼受弯构件在使用阶段刚度计算的主要因素。根据我院近年的几批试验数据,采用线性回归的方法,得出了本文建议的无粘结部分预应力砼受弯构件的刚度计算公式。并对我国有关规范和设计建议的部分预应力刚度计算公式如何用于无粘结部分预应力砼提出了修正的建议。本文所提刚度公式的计算结果与试验结果符合良好。更多还原

【Abstract】 This paper studies the effect of various factors on the flexuraj stiffness of unbonded partially prestressed concrete member in the serviceability stage. Based on several sets of experimental data from China Academy of Building Research, a formula for estimating stiffness of unbonded partially prestressed concrete flexural members has been proposed by means of linear regression analysis. On the other hand, formulas for stiffness estimation of unbonded partially prestressed concrete flexural members to be adapted in the future revision of the relevant Chinese Design Code and Recommendation are also suggested. Calculated deflections are in good agreement with the measured results.更多还原