钢筋混凝土壳体矮圆仓的外环梁设计

Design of Outer-Ring Beam of Squat Reinforced Concrete Shell Silo

采用环形结构的计算理论,对外环梁进行了受力分析·通过对壳体理论的简化计算,分析了壳体在薄膜力和边缘力作用下的位移和转角,利用外环梁处的位移协调条件,能够求出外环梁的力和弯距,为外环梁的工程设计提供理论工具·并且利用给出的公式可以计算矮圆仓壳体上弯矩和应力的分布·分析表明,弯矩在接近外环梁处较大,远离则逐渐变小·通过与有限元计算和实测的结果对比,说明本文的计算方法具有可靠的精度·

Use the calculating method of ring structures to analyze the internal forces of an outer-ring beam and simplifies the calculation of shell moment theory to analyze the displacements and turning corners under the actions of membrane force and fringe force. According to the condition under which the displacements at the beam can be coordinated, some formulas are given to calculate the forces and moments of outer-ring beam and their distributions on the shell of squat silo, thus providing a theoretical method for the design of such projects. An analysis indicates that the moments near the outer-ring beam are bigger and become smaller away from the beam. In comparison to the result of finite element analysis and field measurements, the calculating method proposed shows reliable precision.