钢筋混凝土非线性有限元分析中剪力传递系数的研究

Study on Shear Force Transfer Coefficients in Non-Linear Finite Element Analysis of Reinforced Concrete

以目前有关剪力传递的大量研究成果及学者提出的取值建议为基础,根据已有试验结果与ANSYS数值模拟计算选取各种剪力传递系数之后的结果进行对比,得到了剪力传递系数取值对分析结果的作用及影响,给出了剪力传递系数的选取原则。经计算分析证明,剪力传递系数的取值对计算结果和计算收敛情况都有较大影响。βt的取值不宜过小,否则会收敛困难,并且计算结果也会与实测值相差较大,建议取0.4～0.7;对于βc的取值,建议在0.9～1之间。

Based on the research results on shear force transfer and the values recommended by some researchers, the avail- able test results are compared with the results calculated with the ANSYS numerical simulation system by using various shear transfer coefficients and the action and influence of the shear transfer coefficients taken in the calculation upon the analytical results are obtained, presenting criteria for selection of shear transfer coefficients. The calculation and analysis proved that the values adopted for shear transfer coefficients produced significant impact on the calculated results and the convergence of cal- culation, wherein βz should not be taken too small, or otherwise the convergence will be very difficult and the calculated re- sults might differ greatly from the measured results. It is therefore recommended that the value of βt should be taken between 0.4 and 0.7 and βc should be between 0.9 and 1.