A simplified method for estimating the fundamental period of masonry infilled reinforced concrete frames
A simplified method for estimating the fundamental period of masonry infilled reinforced concrete frames
复制标题
砌体填充钢筋混凝土框架基本周期估算的简化方法
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Ling
中科院分区：
文献类型：
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作者：
Rui Jiang;Liqiang Jiang;Y. Hu;Jihong Ye;Ling
基本周期是建筑结构抗震设计和地震危险性评估的重要参数。本文根据工程力学基本理论，提出了一种预测砌体填充钢筋混凝土框架基本周期的简化理论方法。该方法考虑了钢筋混凝土框架和砌体墙的不同结构形式。填充墙结构的基本周期是根据钢筋混凝土框架和砌体墙的抗侧刚度沿高度沿着积分计算的。为了控制周期估计的误差，考虑了一个校正系数，并根据多元线性回归分析确定了校正系数。通过两个砌体填充钢筋混凝土框架模型的振动台试验，验证了修正公式的正确性，计算值与试验值的误差分别为2.3%和23.2%。最后，提出了一种基于概率的修正方法，该方法允许结构工程师在一定的安全冗余度下选择合适的基本周期。所提出的方法可以快速灵活地用于预测，它可以手工计算，易于理解。因此，在工程实践中，该方法可以代替现有的方法来确定填充墙框架结构的基本周期。
The fundamental period is an important parameter for seismic design and seismic risk assessment of building structures. In this paper, a simplified theoretical method to predict the fundamental period of masonry infilled reinforced concrete (RC) frame is developed based on the basic theory of engineering mechanics. The different configurations of the RC frame as well as masonry walls were taken into account in the developed method. The fundamental period of the infilled structure is calculated according to the integration of the lateral stiffness of the RC frame and masonry walls along the height. A correction coefficient is considered to control the error for the period estimation, and it is determined according to the multiple linear regression analysis. The corrected formula is verified by shaking table tests on two masonry infilled RC frame models, and the errors between the estimated and test period are 2.3% and 23.2%. Finally, a probability-based method is proposed for the corrected formula, and it allows the structural engineers to select an appropriate fundamental period with a certain safety redundancy. The proposed method can be quickly and flexibly used for prediction, and it can be hand-calculated and easily understood. Thus it would be a good choice in determining the fundamental period of RC frames infilled with masonry wall structures in engineering practice instead of the existing methods.