寒冷地区混凝土坝表面保温效果研究-河北农业大学学报.pdfVIP

33 1 Vol.33 No.1 20 1 0 1 J OURNA L OF AGRICULT URAL UNIVERSIT Y OF H EBEI 　 　 Jan .2 0 1 0 :1000-1573(2010)01-0098-06 1 1 1 1, 2 张晓飞 , 　陈尧隆, 　李守义, 　解宏伟 ＊ (1. , 7100 8;2. , 810016) :, 。 , , 、 5 cm 8 cm 3 , 。: , , , 。 　　:;;;; :TB 302 :A Study on the effect of superficial insulation of RCC dam in cold area 1 1 1 1, 2 ZHANG Xiao-f ei , CHEN Yao-long , LI Shou-yi , XIE Hong-wei (1.Xian University of Technology, Institute of Water Resources and Hydroelectric Engineering, Xian 7100 8, China; 2.Qinghai University, Hydroelectric Department, Xining 810016, China) Abstract:The superficial insulation is often used to avoid the crack for the concrete dam in cold area.According to the material property of RCC, the temperature field and thermal stress of certain RCC gravity dam in cold area are simulated and analyzed by means of three-dimensional finite element relocating mesh method without heat insulting and with 5 cm and 8 cm polysty- rene slab for keeping w arm.Moreover, the effect of superficial insulation and influence of dif- ferent depth on temperature field and thermal stress are analyzed.The results show that super- ficial insulation of RCC dam in cold area can increase superficial temperature of dam greatly. Accordingly, the superficial temperature difference and maximal tensile stress of the dam can be decreased to avoid the crack of dam surface. Key words:three-dimensional finite element relocating mesh method;temperature field;ther- ma