【摘要】 利用大型混凝土静、动三轴试验机,完成了3种定侧压混凝土的双轴压疲劳试验。观察了试件破坏形态。将单轴压疲劳试验结果与其他试验者的结果作了比较,验证了结果的有效性。在试验基础上,分析了双轴压混凝土的疲劳特性和变形规律;建立了相应的S-N关系及考虑侧应力影响的统一疲劳方程。研究结果,为受复杂重复荷载作用的混凝土结构设计和分析提供了试验依据。更多还原

【Abstract】 The fatigue tests of concrete under biaxial compression with constant confined stress were performed using the static-dynamic triaxial test system. The failure modes of concrete specimens were acquired. The uniaxial test results of fatigue were compared with those obtained by other researchers for validity. The laws of compressive fatigue strength and deformation are analysed based on the results of experiment. The relationship of S-N under certain lateral stress is established and from which the unified fatigue equation accounting for different confined stresses is derived. The results of investigation in this paper offer the basis for design and analysis of concrete structures subjected to triaxial cyclic loading.更多还原