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A numerical study on the effect of lintel beams on the behavior of masonry-infilled steel frames with window openings and the formation of compressive struts
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DOI：10.1007/s11803-026-2401-5.png)
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Abstract
En 中文
The present study aims to evaluate the effect of the lintel beam above the window opening in perforated infilled frames by the finite element modeling of a number of specimens with and without lintel beams, calibrated against four large-scale single-story single-bay steel moment-resisting frames that were constructed in Tasnimi and Mohebkhah (2011)’s study. Box sections were used as lintel beams, while roller supports were used in the specimens without a lintel beam. It was demonstrated that the absence of this component in the numerical modeling of infilled frames with window openings led to significant errors in estimating ultimate load and its corresponding displacement, which were higher in specimens with larger openings. It also resulted in considerable errors in predicting failure modes in the infills, which can cause changes in the principal stress field of the infills. Our results suggest that there is no need to have four compressive struts for the macro-modeling of the infilled frames with central openings. The location of the lintel beam influenced the position of the struts, particularly in the samples with larger openings. The specifications of the compressive struts depend on the drift applied to the structure.
Keywords:
perforated infilled frame
nonlinear static analysis
lintel beam
openings
failure modes
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3.3
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115
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