【摘要】 本文根据所收集到的近十余年来国内外完成的有翔实记录的以不同方式循环加载到破坏的44个钢筋混凝土柱的试验结果,对知名的Park-Ang双参数破坏准则进行了识别。发现在该准则预测结果中损伤指标D的位移项Dδ和能量项DE的比重与构件在滞回循环中达到的位移延性μ的关系与近年来试验研究中逐步认识到的随着μ的增大Dδ的比重相应增大而DE的比重相应下降的规律是相反的。为了纠正这一点,本文根据上述试验结果对该准则提出了修正建议,该建议符合合理的Dδ-μ及DE-μ关系,且改善了预测结果与试验结果的符合程度。另外,本文还对破坏准则与普遍意义的损伤识别准则的关系及区别进行了讨论。更多还原

【Abstract】 Based on the results of 44 RC column tests with detailed record collected in this paper,which were carried out until failure under various cyclic loading modes in the world in the last decade,the well-known Park-Ang criterion for failure is identified.It can be found that the two relations between the contributions of the displacement term D_δ and the energy term D_E of the D-value at failure and the displacement ductility μ of the specimen reached in cyclic loading are opposite to the trend from late experiments that the contribution of D_δ increases and the contribution of D_E decreases with the increase of μ.To correct this,a modification is proposed in this paper according to the experimental results stated above,which matches the reasonable relations of D_δ-μ and D_E-μ,and makes the predicted results more close to the experimental ones.In addition,the relationship and difference between criteria for failure and for general damage identification are stated in this paper.更多还原