超高层框架-核心筒结构中混凝土的徐变与收缩分析

摘要

Take a super high-rise frame-core tube structure in Chengdu as an example, and set up the model by ETABS software and apply loads, to analyze the additional effect on the structure because of the additional bending moment and shear force of the beam caused by the concrete creep and shrinkage settlement of the internal structure. The results show that differences of the shrinkage and creep of concrete in the structure are small, and the effect of shrinkage and creep of concrete can be eliminated by taking some compensation measures in the construction process.%以成都市某超高层框架-核心筒结构为例，通过ETABS软件建立相关模型并施加荷载，分析了结构内部混凝土徐变和收缩沉降引起的梁的附加弯矩和剪力对结构产生的附加作用。结果表明该结构中混凝土的收缩和徐变差异性较小，在施工过程中采取一些补偿措施即可消除混凝土收缩和徐变产生的影响。