MESO-SCALE MODEL FOR CONVENTIONAL CONCRETE
This paper introduces the mesoscale model specifically for simulating the compressive failure of concrete whilst softening. Compressive failure of concrete is a wedge mechanism in which the softening behaviour is dictated by widening and sliding at the wedge interface. Standard finite element analyses with homogenized assumption in which this wedge mechanism cannot be simulated which applies to most stress-strain based analyses can only approximately simulate compressive failure. In this paper,a mesoscale model,which divides concrete into a three phase composite material consisting of mortar matrix,fibres and interfacial transition zone (ITZ),is developed based on the commercial program LS-DYNA to model compressive failure of conventional concrete specimens under static loading. The developed mesoscale model is then validated by available empirical formulae by Teng et al. (2007). The performance of concrete specimens under different lateral confinement is simulated using the mesoscale model. The simulated results are then compared with those predicted with Jiang and Tend (2007) and Mahommed Ali et al.s (2008). Size effect of specimens are also investigated.
Conventional concrete Meso-scale model Confinement Size effect
Yu Su Cheng-Qing Wu Deric John Oehlers
School of Civil,Environmental and Mining Engineering,the University of Adelaide,Adelaide,SA 5005,Australia
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
546-551
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）