钢筋混凝土结构施工期间竖向荷载传递仿真分析

SIMULATION ANALYSIS OF THE VERTICAL LOAD DISTRIBUTION OF REINFORCED CONCRETE STRUCTURES DURING CONSTRUCTION

施工期间钢筋混凝土结构的承力体系是由低龄期的混凝土构件和模板支撑系统组成。由于施工期间的结构是一个时变结构,其材料属性、边界条件、荷载都随时间变化,所以很难确定其竖向荷载的传递规律。通过对通用有限元程序ANSYS进行二次开发,实现对施工过程中楼层浇筑、支撑拆除等关键工况的模拟,得到施工期间竖向荷载的传递规律,为钢筋混凝土结构支模层数和拆模时间提供依据。

The bearing structure of reinforced concrete building during construction consists of formwork shores and early age concrete members.The distribution rule of vertical load is not easy to be found because the material character,the boundary and load of reinforced concrete structures are varying with time.Through the second-development of ANSYS,the floor casting and shores removing were simulated,from which the distribution rule was obtained.The floor of shores and the time of shores removing would be confirmed according as this analysis.