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非弹性位移比谱是估计结构侧向最大非弹性位移的有效方法。该文以按照我国规范设计的规则钢筋混凝土框架结构为研究对象,分析了IDA方法和Pushover方法建立结构层能力曲线的适用性,研究了框架结构的非弹性位移比谱,研究表明框架结构的非弹性位移比谱与单自由度体系的非弹性位移比谱总体趋势基本相同。在短周期段(约小于1.2s),框架结构的非弹性位移比谱随周期的增加而急剧减小,而对于周期大于1.2s的周期段,非弹性位移比谱几乎为常值。在长周期段,框架结构的非弹性位移比谱远超过1.0,等位移原理不适用,当延性系数较高时更是如此。为使单自由度体系非弹性位移比谱的研究成果应用于实际框架结构,本文还给出了利用单自由度体系非弹性位移比谱估计框架结构非弹性位移比谱的修正系数。
The inelastic displacement ratio spectrum is an effective method to estimate the maximum lateral inelastic displacement of structures. In this paper, according to the rules of China’s standard design of reinforced concrete frame structure as the research object, the IDA method and the Pushover method to establish the ability of the structural layer curve of applicability of the framework of the inelastic displacement ratio spectrum study shows that the structure of the frame The general trend of the elastic displacement ratio spectrum and the inelastic displacement ratio spectrum of the single degree of freedom system are basically the same. In the short period (less than 1.2s), the inelastic displacement ratio of the frame structure decreases sharply with the increase of the period, while the inelastic displacement ratio spectrum is almost constant for the period of more than 1.2s. In the long period, the inelastic displacement of the frame structure is far more than 1.0, and the principle of equal displacement does not apply, especially when the ductility coefficient is high. In order to apply the research result of the inelastic displacement ratio spectrum of a single degree of freedom system to the actual frame structure, a correction coefficient for estimating the inelastic displacement ratio spectrum of the frame structure by using the inelastic displacement ratio spectrum of a single degree of freedom system is also given.