农业工程学报2011，Vol.27Issue(5)：7-12,6.DOI:10.3969/j.issn.1002-6819.2011.05.002
倒虹吸地涵混凝土结构施工期温控敏感性分析
Sensitivity analysis of temperature control for concrete structure of inverted siphon underground culvert
摘要
Abstract
In view of the character of concrete structure of inverted siphon underground culvert and the problem of concrete crack in the period of construction, this paper introduced the main factors which influence the temperature and stress of concrete structure, and the main cause of crack is closely related to placing delaminating, interval time, cold wave strike, diurnal amplitude, superficial thermal insulation and cooling pipe. A case is presented where the 3D FEM simulation of thermal field and stress field of concrete and the numerical algorithm of pipe cooling are adopted to study the sensitivity degree of these factors. It is considered that placing delaminating and interval time greatly Influence the Integrity Deformation Compatibility of concrete structure, and cold wave strike and diurnal amplitude induce adverse effects to crack prevention of surface, and suitable thermal Insulation and cooling pipe greatly improve anti-crack performance of concrete structure. Finally, the paper put forward temperature control measures for crack prevention based on the research results.关键词
混凝土结构/倒虹吸/地涵/敏感性分析/温控影响因素/温度/应力Key words
concrete structures/ inverted siphons/ underground culverts/ sensitivity analysis/ influencing factors of temperature control/ temperature/ stress分类
建筑与水利引用本文复制引用
陈守开,丁兵勇..倒虹吸地涵混凝土结构施工期温控敏感性分析[J].农业工程学报,2011,27(5):7-12,6.基金项目
国家自然科学基金资助项目(50539010,50779010,50579080) （50539010,50779010,50579080）
