环境温湿度对大体积混凝土影响的数值模拟分析

Numerical Simulation and Analysis on the Impact of Environmental Temperature and Humidity on Massive Concrete

环境温湿度的变化及其在大体积混凝土结构中产生的影响不容忽视,对于温度场、温度应力场、湿度应力场,尤其是整体结构应力场的分析,是工程中非常关注的问题。为此,选取理想的球形大体积混凝土结构,仅考虑环境温、湿度的影响,用ANSYS软件依次对该结构的温度场、温度应力场及湿度应力场进行数值模拟,然后将模拟得到的温度应力场与湿度应力场叠加,得到整体应力场,并对模拟结果进行分析和总结。通过对应力场的数值模拟分析,可对大体积混凝土浇筑后裂缝的开展有一定的预见性,对制订温控措施有一定的指导意义。

The influence of environmental temperature and humidity change cannot be ignored in massive concrete structures.Much attention is paid to the analysis on temperature field,thermal stress field,humidity stress field,and especially its total stress field.In view of this,an ideal spherical mass concrete structure is selected,and the temperature field,temperature stress field and humidity stress field are numerically simulated successively through ANSYS on the premise of considering only the impact of environmental temperature and humidity.Furthermore,thermal stress field and the humidity stress field are overlaid to obtain the total stress field.Results of the simulation are analyzed and conclusion is put forward.Through the numerical simulation of stress field,the crack degradation of poured massive concrete can be predicted so as to formulate temperature control measures.