各国规范中RC框架自振周期的对比和探讨

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (11) : 108-113.

论文

各国规范中RC框架自振周期的对比和探讨

阎红霞1，2 , 杨庆山1, 秦敬伟1 , 李明1

作者信息 +

Comparison and evaluation about vibration periods of RC frames in codes of some countries

Yan Hong-xia1,2 , Yang Qing-shan1, Qin Jing-wei1, Li Ming1

Author information +

文章历史 +

摘要

抗震设计时，框架结构的自振周期是决定其地震作用的重要因素之一。各国规范均考虑了填充墙对框架结构自振周期的折减作用，但有的考虑了填充墙布置的影响，另外一些则没有。为了比较各国规范计算自振周期的准确性，首先归纳了国内外规范中关于框架结构自振周期的计算方法，并对有、无填充墙的两个框架自振周期的实测值和规范计算值进行了比较，结果表明考虑填充墙布置得到的自振周期较接近实测值，否则误差较大；然后，建立了考虑填充墙的框架有限元模型，通过对这两个框架结构自振周期的实测值和动力振型分析值的对比，验证了模型的正确性；最后采用这种建模方式，分析了填充墙的布置对框架结构自振周期的影响，并参照国外考虑填充墙布置的自振周期计算方法，为我国规范的修正提出了合理的建议。

Abstract

The vibration period is one of main factors of earthquake action for frame structures in seismic design. The presence of infill walls can significantly reduce the natural period of vibration, which is considered by codes of many countries as well as China. And these countries do not consider the layout of infill walls. In order to verify it, this paper summarizes the computational codes of natural period of vibration both at home and abroad and also compares the computational and the measured values of the fundamental periods of vibration of two frames, one has infill walls while the other without them. It could be found that the result considering the layout of infill walls is more reasonable. Then the influence of infill walls on vibration period has been studied using finite element dynamic analysis whose validity is verified through the compartment between measured and analytical values. In the end reasonable comments on computation of natural period of vibration are put forward for the revision of China codes.

导出引用

阎红霞;; 杨庆山; 秦敬伟; 李明. 各国规范中RC框架自振周期的对比和探讨[J]. 振动与冲击, 2012, 31(11): 108-113

Yan Hong-xia;; Yang Qing-shan; Qin Jing-wei; Li Ming. Comparison and evaluation about vibration periods of RC frames in codes of some countries[J]. Journal of Vibration and Shock, 2012, 31(11): 108-113