以顺德粮食产业园项目为背景,对圆形浅仓仓顶结构进行了优化设计研究.通过理论计算和数值模拟两种计算方法,对锥形壳体壳壁在不同倾角下的结构内力进行了系统研究和对比分析.研究结果表明:锥形壳体环向力上部为压应力下部为拉应力,径向力为压应力,理论计算方法的环向力计算结果与实际不符,建议修正相关理论计算方法;随着倾角的减小,环向力、径向力增大且变化速率加快,综合考虑结构受力、施工和使用情况,以将倾角控制在18.～25.为宜;壳体下部环向受拉区及外环梁需按计算配置受拉钢筋.研究结果对RC圆形浅仓仓顶结构优化设计有所裨益.%A study for roof structure optimization of a squat silo was carried out in this paper for the project of ShunDe Grain Industrial Park.The radial force and circumference force of conical shell at different inclinations were calculated and compared by numerical simulation and theoretical calculations.Results showed that the circumference force of the upper part of conical shell was compressive stress and the lower part was tensile stress;the radial force was compressive stress;the circumference force calculation results of theoretical calculation method were not accord with the practice,and the theoretical calculation methods in the relative code should be modified;the circumference force and radial force of the conical shell increased with accelerated change rate with the decrease of inclinations;it's proposed that the degree of the silo roof shell should be controlled between 18° to 25° and the lower tensile region of the conical shell and the outer-ring beam should be provided with tensile steel bar based on calculation results.The research result is beneficial for roof optimization design of RC squat silo.
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