论文部分内容阅读
结构的地震破坏可看作是超过屈服后的非弹性阶段的低周疲劳问题,而单根柱的破坏分析是整个框架失效分析的基础。本文通过八根1/2比例的钢筋混凝土柱在不同位移幅值下的等幅低周疲劳试验和六根非对称位移循环下的低周疲劳试验,探讨了在不同位移幅值下钢筋混凝土柱累积损伤的发展规律以及低周疲劳寿命的表达式,给出了低周疲劳寿命与不同位移水平下正负位移幅值比之间关系的表达式。希望以此为基础,建立更为合理的结构抗震破坏准则。
The seismic damage of the structure can be regarded as the low cycle fatigue problem beyond the inelastic stage after yielding, and the failure analysis of a single column is the basis of the failure analysis of the entire frame. This paper discusses the accumulation of reinforced concrete columns under different displacement amplitudes through constant-amplitude low-cycle fatigue tests with eight 1/2-ratio RC columns under different displacement amplitudes and low-cycle fatigue tests under six asymmetric displacement cycles. The development law of the damage and the expression of the low-cycle fatigue life give an expression of the relationship between the low-cycle fatigue life and the amplitude ratio of positive and negative displacements under different displacement levels. It is hoped that based on this, a more reasonable structural earthquake damage criterion will be established.