大体积混凝土早期温度发展规律及温度控制  

The Rule of Temperature development and temperature Controlled of mass concrete

作　　者：吕建福 汪东杰[2] 巴恒静[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150006 [2]杭州市交通设施建设处,浙江省杭州310005

出　　处：《混凝土》2006年第4期23-24,42,共3页Concrete

基　　金：国家自然科学基金资助项目(50408016)

摘　　要：本文通过对桥栋大体积混凝土的温度测试,获得混凝土内部瞬时的温度场和温度发展规律。事先安装冷却管减缓混凝土内部水泥水化,控制内部的温升,并根据现场实测温度调整表面覆盖层的厚度进行养护,这样可以减小表层与中心温差,从而可以减少或杜绝混凝土的表面和内部的微裂缝。此外根据工程实际利用有限元软件ANSYS,进行混凝土温度场的数值模拟。Through having measured the temperature of bridge pier mass concrete, instant internal concrete temperature field and the rule of temperature development was obtained. Pre-embedding cooling duct in concrete slow up cement hydration rate , control the internal concrete temperature rise and according to measured temperature to adjust the cover thickness, so it reduce internal-surface temperature difference. Thus it reduce or avoid the crack arising. Additionally, according to engineering practice utilizing finite software- ANSYS, the temperature distribution of mass concrete was got through mathematical analysis.

关 键 词：温升规律 降温措施 ANSYS数值分析 温度场分布 

分 类 号：TU528.01[建筑科学—建筑技术科学]