This study aims to propose a multi-strut macro-model, capable of simulating the overall force-displacement behaviour of infilled frames with various opening configurations. For this purpose, the results of finite element modelling calibrated against several experimental data are employed to determine the characteristics of a multiple-strut model for such infilled frames. The results indicate that the size of the opening along with its position, compared to the size of the infill wall, can significantly affect both the inclination and also the effective width of the struts and therefore, the overall behaviour of infilled frames with opening. The proposed model is evaluated parametrically against FEM numerical results, with varying characteristics such as opening size and position, opening height-to-length ratio, height-to-length ratio of the infilled frame and relative rigidity of frame to the infill wall. The comparison of the derived results with the analytical and experimental findings demonstrates the ability of the model to approximate the lateral response of infilled frames with openings in a reliable and robust manner. A simple reduction factor for the ultimate strength of the perforated infilled frames is proposed based on opening size relative to infill wall size as well as relative stiffness of the frame and infill wall.

这项研究旨在提出一个多支柱的宏模型，该模型能够模拟具有各种开口构造的填充框架的整体力-位移行为。为此，针对几个实验数据校准的有限元建模结果用于确定此类填充框架的多支柱模型的特征。结果表明，与填充壁的尺寸相比，开口的尺寸及其位置会显着影响支柱的倾斜度和有效宽度，因此，还会影响带有开口的填充框架的整体性能。根据有限元数值结果对所提出的模型进行参数评估，并具有不同的特征，例如开口尺寸和位置，开口高长比，填充框架的高长比和框架与填充壁的相对刚度。所得结果与分析结果和实验结果的比较表明，该模型具有以可靠且可靠的方式近似带有开口的填充框架的横向响应的能力。根据相对于填充壁尺寸的开口尺寸以及框架和填充壁的相对刚度，提出了带孔填充框架极限强度的简单折减系数。