摘要
考虑承台、桩基和地基三者的共同作用,以及土的塑性特征,采用三维有限元对承台系统受力进行了非线性分析。研究了地基不均匀沉降随荷载增加的变化趋势,桩顶反力的发展过程以及塔柱承台及系梁的应力分布,明确了现有设计下承台系统的工作性状。并对不均匀沉降引起的次应力作了进一步的分析,得出不均匀沉降对承台应力尤其是系梁区应力的影响。指出合理的桩基设计,不但可以降低次应力还可以有效减少配筋率,克服因配筋太多引起的施工不便。
Considering the interaction among pile-support,piles and soil and the elastoplastic property of soil,pile-support system is researched by three-dimensional non-linear finite element method.The change of soil non-uniform settlement with increase of load,pile counterforce development and stress distributing in the pile-support and link beam are researched.The working behavior of pile-support system is defined.The secondary stress for the non-uniform settlement is further studied and the effect of the non-uniform settlement is got.It is pointed out the rational piles and the decreases of asymmetric settlement are the effective methods to reduce the secondary stress and the steel ratio of platform and avoid inconvenience of construction.
出处
《工业建筑》
CSCD
北大核心
2005年第5期16-19,共4页
Industrial Construction
