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本文将钢筋混凝土框架和钢框架的低周疲劳性能引入地震反应谱的计算中,以地震反应累积损伤系数的形式考察了结构低周疲劳性能对地震破坏反应的影响。分析结果表明:1.结构破坏同时受结构本身强度及地震强烈强度的影响,普通结构在地震作用下有所损伤是难免的,但并不一定导致完全丧失抵抗外荷载能力的那种倒塌;2.结构强度和结构周期是引起地震作用下结构破坏的主要因素,当这两者均为中等大小时,结构低周疲劳性能及地震动持续时间也会对结构破坏产生影响;3.地震动持续时间对结构物损伤的影响受结构低周疲劳性能决定,它随结构本身的性质,尤其是结构寿命曲线而有差异。
In this paper, the low-cycle fatigue performance of reinforced concrete frames and steel frames is introduced into the calculation of seismic response spectra. The effect of structural low-cycle fatigue performance on seismic damage response is investigated in the form of cumulative damage coefficients of seismic responses. The analysis results show that: 1. The structural damage is affected by both the strength of the structure itself and the strong intensity of the earthquake. It is unavoidable that the ordinary structure is damaged under the earthquake, but it does not necessarily lead to the complete loss of the kind of collapse that resists the external load. Structural strength and structure cycle are the main factors causing structural damage under seismic action. When both of these are medium in size, the structural low-cycle fatigue performance and ground motion duration will also have an impact on the structural damage; 3. Ground motion continues The influence of time on structural damage is determined by the low-cycle fatigue performance of the structure. It varies with the nature of the structure, especially the structural life curve.