摘要
目前 ,超长框架结构楼板的温度应力分析大都集中于混凝土的线弹性阶段。利用钢筋混凝土非线性有限元的开裂模型 ,对模板在降温条件下的开裂过程进行数值模拟 ,并与实际工程的观测结果和工程中采用简化模型的计算所得结果进行比较 ,表明采用非线性有限元开裂模型能够较好地估测结构降温引起的应力分布 ,以及由此而引起的开裂位置及方向 。
At the present most of the temperature stress analyses are conducted at the linear elastic stage of a concrete. A numerical simulation of the cracking process of a beam-slab structure at detemperature is carried out using nonlinear FEM crack model of reinforced concrete, whose results are compared with the observations of actual projects and the calculated ones of a simplified model. It is proved that the stress distribution due to the structure′s detemperature, and the position and direction of the cracks due to which can all be estimated properly by this model. Which provides a guidance to engineering design and practice.
出处
《工业建筑》
CSCD
北大核心
2004年第10期30-32,61,共4页
Industrial Construction
