摘要
在现浇混凝土空心板现有抗弯刚度计算方法的基础上,借助大型有限元程序ANSYS,对空心板两个方向抗弯刚度折减系数进行了理论分析,结果表明,d/h和tw/d是主要影响因素,且d/h影响显著,tw/d次之。平行于管轴方向的抗弯刚度大于垂直于管轴方向的抗弯刚度;应用数理统计软件SPSS对数据进行非线性回归,给出了空心板抗弯刚度折减系数的近似计算公式和空心板两个方向的抗弯刚度的计算方法。最后,ANSYS通用有限元程序对算例的计算结果的验证表明,给出的抗弯刚度计算方法的误差均在2%左右,比传统的抗弯刚度计算方法精确得多。
Based on the existing calculating methods of flexural rigidity for cast-in-situ concrete hollow slab,according to the analysis and theoretical derivation by ANSYS,it is deduced that the reduction factor of flexural rigidity for castin-place concrete hollow slab,which is only related with d/handt_w/d,of which d/h is the primary factor and t_w/d is the second.Applying with mathematical statistical software SPSS for nonlinear regression of the data,it is received more precise calculating formula of the reduction factor of flexural rigidity of hollow slab,and the obtained flexural rigidities of hollow slab in both directions.The computation results of examples by the given formula is compared with ANSYS general finite element program.It shows that the given formula has errors of about 2%,which is more precise than traditional calculation method of flexural rigidity.
出处
《工业建筑》
CSCD
北大核心
2009年第S1期365-368,419,共5页
Industrial Construction
关键词
现浇混凝土空心板
抗弯刚度
折减系数
cast-in-place concrete hollow slab
flexural rigidity
reduction factor
