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钢筋混凝土框架结构连续倒塌动力放大系数

DOI: 10.3969/j.issn.1005-3026.2014.09.030, PP. 1350-1354

Keywords: 钢筋混凝土框架结构,连续倒塌,动力效应,动力放大系数,拆除构件法

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Abstract:

研究了钢筋混凝土框架结构连续倒塌破坏设计中的动力放大系数的取值,系统性地研究了结构的最大塑性转角、高度、宽度、配筋率及跨度对动力放大系数的影响.结果表明:不同结构的动力放大系数变化趋势一样,最大值仅为113,远远小于美国GSA规范给定的20;动力放大系数随着最大塑性转角的增加而减小,随着截面配筋率的增加而增加;结构的角柱失效的动力效应大于内柱的失效;结构不同的高宽比、跨度、截面尺寸和荷载大小对动力放大系数影响不大.

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