摘要
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。
The methods of Denham and elastic foundation beam for computing bending moment at the shell-to-bottom joint are discussed respectively. Two mistakes commonly made in calculation of bending moment at the shell-to-bottom are corrected. Based on the results of computation for 100 000 m3 floating-roof tank, the effects of dimensions of bottom plate and foundation coefficient on bending moment at the shell-to-bottom joint and bending stress in bottom plate are analyzed, founding the way to bring down the peak stress near the shell-to-bottom and to make large angle slit bonding area stronger to withstand the low frequency fatigue damage. The comparison between results of the calculation and ones of actual measurement for 100 000 m3 floating-roof tank shows that Denham method suits for calculation stress of bottom plate on concrete ring beam in the vicinity of shell-to-bottom joint.
出处
《石油化工高等学校学报》
CAS
1997年第4期36-39,共4页
Journal of Petrochemical Universities
关键词
油罐
弯矩
应力
底板几何尺寸
Oil tanks
Bending moments
Bending stresses
Shell-to-bottom joint
