考虑管冷的混凝土水化热温度场的有限元分析  

Finite element analysis of hydrated heat temperature field of massive concrete considering pipe cooling

作　　者：王军[1,2] 郝宪武[1] 李峰[2] 柳建设[2] 刘鹏[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]西安市政设计研究院有限公司,陕西西安710068

出　　处：《广西大学学报（自然科学版）》2013年第4期929-935,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：中央高校基本科研业务费专项资金资助项目(CHD2011JC174)

摘　　要：为了研究承台冷却管对大体积混凝土降温作用,分析了大体积混凝土由于水化热而产生开裂的机理;结合工程实例,依据现场实测的混凝土物理及热特性参数建立了有限元仿真模型。模型中考虑了水管冷却、边界条件等因素对其温控的影响。研究了有管冷作用的混凝土时程温度曲线及沿承台厚度方向温度梯度随时间的变化规律,结果表明实测数据和理论计算吻合较好,证明了有限元模拟的正确性。对指导大体积混凝土的设计与施工具有一定的参考价值。In order to study the cooling effect of cooling pipes of platform on massive concrete, the crack mechanism of the massive concrete due to the heat of hydration was analyzed. Then, combined with a practical project, a simulated model was established with the onsite-measured physical and thermal parameters of the concrete. In this model, factors such as pipe cooling and boundary condi- tions that influence its temperature are considered. Temperature curve of the concrete with the pipe cooling was studied. With the change of the time, the variation of temperature gradients along the thickness direction of the platform was studied. The results of the study prove that the experimental data agree with the theoretical calculation. In addition, it proves the accuracy of the finite element simulation. Therefore, the analytical results offer certain reference for the design and construction of the similar project.

关 键 词：大体积混凝土 水化热 有限元 管冷 

分 类 号：U443[建筑科学—桥梁与隧道工程]