大型工业厂房筏板基础大体积混凝土温度应力有限元模拟分析  

Finite Element Simulation of Temperature Stress of Mass Concrete on Raft Foundation in Large Industrial Building

作　　者：郭大垅 Guo Dalong(Fujian Heshengda Construction Engineering Co.Ltd.,Fuzhou,Fujian 350011)

机构地区：[1]福建和盛达建筑工程有限公司,福建福州350011

出　　处：《江西建材》2024年第12期329-332,共4页

摘　　要：文中基于某大型工业厂房筏板基础施工案例,采用ANSYS有限元软件进行模拟,结合各测点实测温度数据,分析大体积混凝土应力分布和开裂情况,同时,分析不同水泥含量和入模温度对大体积混凝土温度场的影响。研究表明,B测位和C测位最大内外温差分别为34.2、23.7℃,拉应力峰值分别为22.29、6.02 MPa,表明混凝土厚度越大,其底部位置越容易出现裂缝;在满足结构需求条件下,应尽量减少水泥用量,且入模温度控制在5~25℃,以减少内外温差,避免出现裂缝。In this paper,based on a raft foundation construction case of a large industrial plant,ANSYS finite element software was used to simulate the stress distribution and cracking of mass concrete,combined with the measured temperature data of each measuring point,and the influence of different cement content and mold temperature on the temperature field of mass concrete was analyzed.The results show that the maximum temperature difference between inside and outside the B and C locations is 34.2、23.7℃respectively,and the peak tensile stress is 22.29、6.02 MPa,indicating that the greater the thickness of concrete,the more prone to cracks at the bottom position.Under the condition of meeting the structural requirements,the amount of cement should be reduced as far as possible,and the mold temperature should be controlled within 5~25℃to reduce the temperature difference between inside and outside and avoid cracks.

关 键 词：筏板基础 大体积混凝土 温差裂缝 防控措施 

分 类 号：TU74[建筑科学—建筑技术科学]