摘要
混凝土结构的开裂,一般的情况是由于拉应力引起的.试验证明,利用机械式双向拉伸仪,进行混凝土的直接单、双向拉伸试验是可行的,结果可靠.试验还表明,混凝土的直拉强度明显低于弯拉强度,而且,其双向拉伸强度比其单向拉伸强度还要低,表现出明显的双向拉伸强度弱化现象.试验方法和有关数据可供工程实践参考.
The crack of concrete structure was commonly aroused by tension stress. The experimentd results showed that it was feasible and tried to using mechanical two-way switch apparatus to do uniaxial and bidirectional direct pulling experiment of concrete. It was also showed that the direct pulling strength of concrete was obviously lower than the resistance to bending and tensile strength. And the bidirectional tensile strength was lower than the uniaxial tensile strength; it was showed obviously bidirectional tensile strength weakening effort. The method of experiment and relational data can be consulted for engineering.
出处
《湖南文理学院学报(自然科学版)》
CAS
2007年第3期85-87,94,共4页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
湖南省自然科学基金资助项目(2004JJ40039)
关键词
水泥混凝土
直拉试验
弯拉试验
抗拉强度
concrete
direct pulling experiment
resistance to bending and pulling experiment
tensile strength