大圆筒结构稳定性分析  

Stability Analysis of Large Cylinder Structure

作　　者：许英[1] 鲁子爱[1] 李桂波 

机构地区：[1]河海大学交通与海洋工程学院,江苏南京210098 [2]海军第七工程建筑处,广东广州510600

出　　处：《水运工程》2003年第9期1-4,20,共5页Port & Waterway Engineering

摘　　要：本文研究探讨了大圆筒在结构临界状态下内外土压力的分布模式,建立了大圆筒的抗倾稳定条件。结合工程实例分析,得到结论:结构失稳时绕轴线上某点转动;转动点以上筒前土体和转动点以下筒后土体的抗力形成的抗倾力矩是总抗倾力矩的主要部分;加大筒体的沉入深度以及提高回填土的强度是有效的工程措施。The distribution mode of earth pressure along different sides of large-diameter cylinder structure in the critical state is studied and the condition of anti-overturning stability of large cylinder is put forward. According to the practical engineering case, it is concluded that: the structure will rotate around a certain point on the axis when losing stability; the anti-overturning moment which is formed of the resistance of the earth in front of the cylinder and above the turning point and that behind the cylinder and under the turning point takes a great proportion of the overall anti-overturning moment; increasing the sinking depth of the structure and improving the strength of the backfilling earth are the effective measures in engineering projects. 

关 键 词：大圆筒结构 土压力 抗倾 力矩 稳定性 分布模式 

分 类 号：TU311.2[建筑科学—结构工程] TU333