同济大学学报（自然科学版）2013，Vol.41Issue(9)：1305-1309,5.DOI:10.3969/j.issn.0253-374x.2013.09.005
高温后混凝土断裂韧度及其权函数计算法
Residual Fracture Toughness and Its Weight Function Method of Post-fire Concrete
摘要
Abstract
Investigations on the residual fracture properties based on Double-K fracture model is implemented.The loadcrack mouth opening displacement curves of ten groups specimens at the maximum temperature of 600 ℃ are obtained to calculate the Double-K fracture parameters.Using the Petersson softening curve of cohesive stress,the cohesive fracture toughness is calculated by weight function method and the result is compared to that by analytical integral method.The comparison results demonstrate a good coincidence and the validity of Double-K fracture model to post-fire concrete is proved.关键词
高温后/双K断裂模型/权函数法/黏聚断裂韧度Key words
post-fire/ Double-K fracture model/ weight function method/ cohesive fracture toughness分类
建筑与水利引用本文复制引用
俞可权,商兴艳,陆洲导..高温后混凝土断裂韧度及其权函数计算法[J].同济大学学报（自然科学版）,2013,41(9):1305-1309,5.基金项目
土木工程国家重点实验室基金(SLDRCE09-D-02) （SLDRCE09-D-02）
