摘要
根据混凝土材料的应力-应变试验研究,得出试验曲线呈明显的分段特征,曲线的离散性发生于应变软化阶段。通过对试验数据序列的混沌动力学分析得出:随着单向抗压强度的增加,混凝土材料全应力-应变过程的系统状态由较有序的定常态质变为低混沌态,进而逐渐演化到强混沌态;混凝土材料峰后应力-应变阶段曲线的线性性质增强,裂隙系统状态由强有序的定常态向弱混沌态演化;混凝土材料峰前阶段的裂隙系统基本呈现弱混沌状态。提出将LE1作为混凝土材料阶段特征的稳定判据,将LE1作为系统稳定度的表征量,并在实例计算中证明了该法确定的稳定判据符合实际情况。
According to the research on whole curves of strain-stress of concrete materials,this paper finds there was an evident features of stages,and the discrete feature of curve is often in strain-softening stage.After data series of test being detected by dynamics of chaos,it presents that system of whole process of strain-stress evolutes from ordered steady state to low chaos state even high chaos state,system after compressive strength which curve of strain-stress is more linear one by one changes from strong ...
出处
《重庆建筑大学学报》
EI
CSCD
北大核心
2008年第3期129-133,共5页
Journal of Chongqing Jianzhu University
