早龄期混凝土板温度应力以及抗裂计算  

Early Age Concrete Slab Temperature Stress and Anti-crack Calculation

作　　者：彭兆锋[1] 易红晟[2] 

机构地区：[1]上海市政工程设计研究总院南方分院,佛山528200 [2]华南理工大学土木与交通学院,广州510640

出　　处：《科学技术与工程》2011年第23期5711-5713,共3页Science Technology and Engineering

摘　　要：通过对早龄期混凝土内温度场的监控,采用差分法来计算其温度应力,绘制出其应力成长曲线。对早龄期混凝土取芯,测出其弯拉强度,作为抗裂限值。将早龄期混凝土的温度应力与强度对比,以此来确定混凝土开裂规律。根据温度监控曲线,确定出混凝土内温差过大的时间段,以此来采取相应的工程措施进行防范。Through monitor the temperature field of the early age concrete, then finite difference method is used to calculate its temperature stress, plot its time-stress curve. Several cores at different ages of the early age concrete are drilled, then its flexural strength is measured, this flexural strength is taken as the anti-cracking limits. Com- pare the temperature stress to the flexural stress which is used to obtain the cracking rules of the early age concrete. According the temperature monitoring curves, the range of temperature that have great gap can be determined out, in order to take corresponding engineering measures to protect against it.

关 键 词：早龄期混凝土 温度应力 抗裂计算 温度控制 

分 类 号：TU755.9[建筑科学—建筑技术科学]