摘要
应用过镇海提出的应力-应变曲线模型,建立了混凝土的荷载-挠度曲线模型。使用所建立的荷载-挠度曲线模型和最小二乘拟合方法,对不同强度等级和养护龄期混凝土的荷载-挠度曲线进行了拟合,同时比较了使用部分和全部测试数据进行拟合所得断裂能计算结果的差异。研究结果表明:所建立的荷载-挠度曲线模型可很好地对实测荷载-挠度曲线进行拟合,同时,使用所建立的荷载-挠度曲线模型,可利用大于反弯点的部分数据来很好地拟合外延整个荷载-挠度曲线。
Based on Guo Zhenhai's stress-strain curve model, a load-deflection model is put forward by the anthors.Using the load-deflection model and least square fitting method,load-deflection curve tested from deferent strength grade samples are fitted, meanwhile, the difference be- tween the fracture energy calculated by partial and total data is compared.Research results show that the load-deflection model can fit the tested load-deflection curve well, and using partial data can deduce the whole load-deflection curve fairly well also.
出处
《混凝土》
CAS
CSCD
北大核心
2012年第3期1-3,共3页
Concrete
基金
“十一五”国家科技支撑计划(2008BAE61B05)