论文部分内容阅读
现行地基规范和地基与基础教材,关于桩下钢筋混凝土单独基础(以下简称基础)底板的内力计算,均采用简化计算方法,即将单独基础的底板视为固定在桩子周边的四面挑出的悬臂板、把地基反力按对角线划分,而沿基础长宽两个方向的弯矩,假设等于相应梯形基底面积上之地基净反力所产生的力矩,这就是对角破裂面的简化模型。但规范和教材所提供的偏心荷载作用下之柱边(偏心方向)弯矩公式,是以相应梯形高度中点
In the current foundation code and foundation and basic teaching materials, the calculation of the internal forces of the sole slab of reinforced concrete under piles (hereinafter abbreviated as foundation) adopts a simplified calculation method, that is, the soleplates of a single foundation are regarded as four-sided cantilever plates fixed on the periphery of the pile. Dividing the foundation reaction force by the diagonal line, and the bending moments in the two directions along the length and width of the foundation are assumed to be equal to the torque generated by the foundation’s net reaction force on the trapezoidal base area. This is a simplified model of the diagonal rupture surface. However, the formula of the column side (eccentric direction) bending moment under the eccentric load provided by the specifications and textbooks is the midpoint of the corresponding trapezoidal height.