论文部分内容阅读
分别采用Ｄｅｎｈａｍ方法和弹性地基梁方法讨论了下节点处弯矩的计算方法。指出了目前计算中常见的两处错误。通过对１０万ｍ３浮顶罐的计算，分析了底板几何尺寸及地基系数对下节点弯矩及底板应力的影响；从中找出降低下节点处应力峰值，增强大角缝区抵抗低周疲劳破坏能力的另一途径。对１０万ｍ３浮顶罐的计算结果同现场实测数据的比较表明，Ｄｅｎｈａｍ方法适合于带混凝土环梁基础的下节点附近的底板应力计算。
Denham method and elastic foundation beam method are respectively used to discuss the calculation method of moment at lower node. Pointed out two common mistakes in the current calculation. Through the calculation of 100,000 m3 floating roof tank, the influence of floor geometry and foundation coefficient on the bending moment and floor stress of the lower node is analyzed. The stress peak at the lower node is reduced and the low angle fatigue damage is enhanced Another way. The comparison between the calculated results of 100,000 m3 floating roof cans and the measured data in the field shows that the Denham method is suitable for the calculation of floor stress near the lower node with concrete ring beam foundation.