| 混凝土箱梁桥零号块水化热过程分析研究 |
| |
| 引用本文： | 缪长青,孙传智,李爱群.混凝土箱梁桥零号块水化热过程分析研究[J].防灾减灾工程学报,2010,30(4):407-413. |
| |
| 作者姓名： | 缪长青 孙传智 李爱群 |
| |
| 作者单位： | 1. 东南大学土木工程学院,南京,210096;东南大学混凝土及预应力混凝土结构教育部重点实验室,南京,210096
2. 东南大学土木工程学院,南京,210096 |
| |
| 基金项目： | 国家自然科学基金重点项目 |
| |
| 摘 要： | 结合黄沙港大桥工程实际,以箱室内外温度测试数据作为边界条件,根据混凝土水化过程的热传导方程,应用有限元分析程序ANSYS,对浇筑期间预应力混凝土连续箱梁零号块结构的温度场进行了仿真分析,并将仿真计算结果与混凝土连续箱梁的实测结果进行了比较。然后,应用ANSYS软件,采用增量法,动态模拟浇筑过程中水化热温度场变化引起的结构应力变化,得到了施工过程中应力场的时间和空间分布规律。分析表明,由于顶板和底板厚度较薄、内外温差较大,温度引起的残余应力也相对较大,而腹板最终的残余应力较小。因此,应该通过覆盖保温材料,控制厚度较薄的底板和顶板的内外温差,以改善内部混凝土后期受力状况,同时要注意控制预应力张拉时间和张拉力的大小。
|
| 关 键 词： | 预应力混凝土连续梁桥 水化热 温度应力 有限元分析 |
Analysis of Hydration Heat for Block Number Zero of Reinforced Concrete Beam Bridge |
| |
| MIAO Chang-qing,SUN Chuan-zhi,LI Ai-qun.Analysis of Hydration Heat for Block Number Zero of Reinforced Concrete Beam Bridge[J].Journal of Disaster Prevent and Mitigation Eng,2010,30(4):407-413. |
| |
| Authors: | MIAO Chang-qing SUN Chuan-zhi LI Ai-qun |
| |
| Institution: | MIAO Chang-qing1,2,SUN Chuan-zhi1,LI Ai-qun1,2(1.College of Civil Engineering,Southeast University,Nanjing 210096,China,2.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,China) |
| |
| Abstract: | This article makes a simulation analysis of the depositing period of block number zero in Huangshagang Bridge,a prestressed concrete continuous beam bridge,with the boundary conditions of actual temperature inside and outside the box beam by using finite element analysis software ANSYS,and makes a comparison of the results of FEA with the measurements.By using ANSYS,the temporal and spatial distribution laws of stress field in the construction process are formulated.It is proved that the residual stress cau... |
| |
| Keywords: | prestressed concrete continuous beam bridge hydration heat thermal stresses finite element analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
