U型槽用于超长地下室结构温度应力优化

The Temperature Stress Optimization of the U-shaped Groove Used in Super-long Basement Structure

针对超长超宽的地下室结构中楼板的温度应力以及温度应力对边柱影响,采用降板(即U型槽式)做法,利用MIDAS/GEN软件分析超长地下室混凝土结构温度应力。与不设缝模型相比,设缝模型由降温产生的柱水平力减小了70%左右,降板模型由温度应力产生的柱水平力减少了50%左右;同时得到顶板在降板模型下温度应力比不设缝模型降低了50%左右,结构无缝设计得以改进,优化了温度应力。U型槽在工程实例中得到应用,取得了很好的效果。

According to temperature stresses of the floor and the detrimental effect on which it has side columns,the method of the lower plate（the U-shaped groove）is taken,MIDAS/GEN software is used to analyze super-long concrete basement temperature stress.Compared with the model without joints,horizontal forces of the columns in the model with joints reduce about 70%,those in the lower plate reduce about 50%;temperature stresses of the floor in the lower plate reduce about 50% relative to the model without joints,the seamless design is more advanced,temperature stress is optimized.The U-shaped groove has also been applied in practical project and good effect has been obtained.