混凝土多轴强度模型的偏平面方程变换及讨论  

Conversion and discussion of the deviatoric plane equations of concrete multiaxial strength models

作　　者：杨健辉[1] 张明军[2] 孙荣玲[3] 龚健[1] 牛海成[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]河南理工大学机械与动力工程学院,河南焦作454000 [3]河南理工大学高等职业学院,河南焦作454000

出　　处：《广西大学学报（自然科学版）》2011年第1期147-159,共13页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金青年基金资助项目(50804014);河南省教育厅科技攻关项目(2010A560010);河南理工大学重点学科固体力学学科资助项目(509902);河南理工大学博士基金资助项目(6482-24)

摘　　要：为了将应力空间中的强度模型转换为偏平面方程,反之亦然,可根据所选择的不同参考坐标轴来实现,有两种变换方法,且可以通过坐标变换实现互逆。通过这两种变换方法,可以相互证明偏平面极限迹线所具有的6折对称特征。而根据混凝土多轴强度模型的偏平面分析,表明混凝土的多轴破坏形态可以分为广义受拉和广义受压两种形式,这就暗示了统一的强度模型是难于实现的,并说明了现行的统一子午线方程是不合理的,需要分类建立或者建立新的统一子午线方程,而这正说明了不同的强度模型需要根据偏平面上的形态进行协调。In order to convert the strength models in stress space into deviatoric plane equations according to the chosen reference coordinates,or vice versa,two kinds of transformation methods are presented,which can be carried out reciprocally by coordinate transformation.6-fold symmetry characteristic of the limit path line on the deviatoric plane can be proved by each other through the two kinds of transformation methods.On the other hand,multi-axis failure modes of concrete can be classified into generalized tension and generalized compression according to the analysis on the deviatoric plane of concrete multiaxial strength models,which implies that it is difficult to create the unified concrete strength model and also explains that current unified meridian equation is unreasonable.Therefore,it is necessary to categorize or create a new unified meridian equations,which also illustrates that different strength models need to be coordinated according to the modes on the deviatoric plane.

关 键 词：混凝土 多轴强度 破坏准则 偏平面 坐标变换 

分 类 号：TU528.1[建筑科学—建筑技术科学]