寒冷地区超长混凝土结构数值分析及优化  

NUMERICAL ANALYSIS AND OPTIMIZATION OF SUPER LONG CONCRETE STRUCTURE IN COLD AREA

作　　者：张崇骁 ZHANG Chongxiao(China Railway Design Co.,Ltd.,Tianjin 300142, China)

机构地区：[1]中国铁路设计集团有限公司,天津300142

出　　处：《低温建筑技术》2018年第5期55-57,共3页Low Temperature Architecture Technology

摘　　要：本文以某预应力混凝土结构为工程背景,采用通用有限元程序MIDAS/Civil对该结构的温度效应进行数值分析,得到温度应力对该结构顶板的影响规律,然后根据温度应力的分布对结构的布置进行了设计优化,从结构布置方面切断了温度应力的传递路径,并与优化前结构进行对比分析。对比结果表明,优化后的结构大大减小了温度应力的影响,对未来同类型结构的设计具有极大的参考价值。Temperature stress is one of the most important factors affecting the cracking of prestressed concrete structures. In this paper,the Harbin Railway Station underground galleries of prestressed concrete structure as engineering background,using the general finite element program MIDAS/ Civil on the temperature effect of the structure by numerical analysis,The influence of temperaturestress on the roof of the structure is obtained. According to the distribution of temperature stress,thelayout of the structure is optimized. The transfer path of temperature stress is cut off from the aspect ofstructure layout,and the former structure is compared with the optimized structure. The comparison results show that the optimized structure greatly reduces the effect of temperature stress,and is of greatreference value for the design of the same type of structure in the future.

关 键 词：预应力梁 混凝土结构 温度应力 数值计算 

分 类 号：TU378[建筑科学—结构工程]