Experimental Study on Mixed-mode Fracture for Concrete
A new criterion (failure stress criterion) is presented for the mixed-mode fracture of concrete by comprehensively evaluating several mixed-mode crack criteria.The new criterion absorbs some results fitting in with concrete from G.C.Sih and Erdogens maximum circumference stress criterion and G.C.Sihs minimum strain energy intensity factor criterion.It combines concrete material fracture property with the condition of loads at the moment of concrete fracture by Weibull theory.It is concluded that concrete crack expands neither along the direction of maximum circumference stress σθmax nor along minimum strain energy factor S.The crack extends along the direction limited in the area controlled by two criteria.The accurate crack position is determined by failure probability Pf of the strength of concrete structure.The experimental results indicate that the new criterion has better precision and adaptability comparing with other criteria and it can be applied to engineering very well.
Mixed-mode fracture Failure stress criterion Failure probability Rupture angle
Zhang LUO
School of Architectural Engineering,Hunan Institute of Engineering,Xiangtan 411104,China
国际会议
上海
英文
1771-1775
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）