欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
最近基于裂缝粘聚力提出了描述裂缝扩展全过程阻力变化的GR曲线,所发展的解析解相关于骨料桥联咬合作用造成的非线性断裂过程区的能量耗散,故与该区域材料使用的拉伸软化本构关系即应力-裂缝张开口位移软化曲线有密切联系。鉴于此,该文采用4种不同的软化曲线研究了软化曲线形状对裂缝扩展阻力GR的影响。结果发现,GR曲线对软化曲线敏感,GR曲线的合理性依赖于软化曲线的准确性。在使用准确软化曲线的前提下,GR曲线的特征点与软化曲线的特征点存在相对应关系。
英文摘要：
Recently, the crack extension resistance curve for crack propagation was proposed based on the crack cohesive action, where energy dissipation due to aggregate cohesive action is the primary contribution. In addition, energy dissipation is closely related with the tension softening curve, i.e., cohesive stress-crack opening displacement curve. Recognizing this, the influences of softening curve on crack extension resistance GR are studied in this paper. Four different tension softening curves are examined firstly. The results show that crack extension resistance GR is sensitive to tension softening curve, and its feasibility depends on the accuracy of softening curve. Also, it is found that the characteristic points in crack extension resistance curve are corresponding to those on softening curve.
同期刊论文项目
同项目期刊论文
Seismic ductility of very-high-strength-concrete short columns subject to combined axial loading and
Theoretical analysis and experimental investigation on flexural performance of steel reinforced ultr
Experimental determination of fracture parameters for crack propagation in hardening cement paste an
Investigation on potential use of strain hardening ECC in permanent formwork with small scale flexur
期刊信息
位置：