论文部分内容阅读
E.Bowles在文献[1][2]中所述环形基础的计算方法及洪建国同志在本刊1981年第2期,文献[3]中所述的改进方法,均未考虑扭矩及弯矩随截面位置改变而方向改变的影响,这在柱数较少时,计算结果偏小,按文[3]四柱环形基础的例子,柱间跨中弯矩M_2偏小10％(见本文算例),若为三柱环形基础,误差更大,这在设计中是不允许的。当柱数较多时,文[1][2][3]的计算方法误差不大,但等分的单元数要增加,否则不能反映弹性地基上土反力间的
E. Bowles’s method of calculation of the annular foundation described in [1][2] and the improvement method described by Comrade Hong Jianguo in the 2nd issue of this publication in 1981, [3] did not consider torque and bending moments. With the change of the cross-section position and the change of direction, when the number of columns is small, the calculation result is small. According to the example of [4] four-post annular foundation, the mid-column mid-span bending moment M2 is less than 10% (see the example ) If it is a three-poster ring base, the error is greater, which is not allowed in the design. When the number of columns is large, the error in the calculation method of [1][2][3] is not significant, but the number of equally divided units must be increased. Otherwise, it cannot reflect the soil reaction force on the elastic foundation.