ผลกระทบของช่องเปิดต่อพฤติกรรมเชิงโครงสร้างของโครงต้านแรงดัดคอนกรีตเสริมเหล็กที่มีผนังอิฐก่อ

Jarun Srechai; Sutat Leeletaviwat

Jarun Srechai Department of Civil Engineering, Faculty of Engineering, Burapha University
Sutat Leeletaviwat ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Keywords: Infill walls, Finite Element, Openings, Moment resisting frame, Reduction factors

Abstract

In this study, a finite element analysis was carried out to evaluate the in-plane structural behavior of the infilled RC moment-resisting frames. The influence of the opening configuration, size and position, were investigated. In addition, the adjacent column’s shear demand was evaluated as well. A 2D finite element based on a simplified-micro modeling approach was utilized. Statics non-linear analyses of the single-bay single-story infilled frame under horizontal monotonic loading and constant vertical loads were performed. The analytical results showed that a reduction in lateral resistance and stiffness of the infill wall depend on opening configuration, size and position. For the global behavior of the infilled frame, the effects of infill wall can be ignored when the opening ratio increase to approximately 40%-50%. In contrast, a significant influence on local behavior such as column’s shear demand was exhibited. Based on the analytical results, the equations for estimating lateral strength and stiffness reduction due to opening of the infill wall are proposed. An efficient method to investigate the additional shear demand on the adjacent columns due to infill wall-frame interaction is suggested as well.

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References

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Effects of Openings on Structural Behavior of Masonry Infilled RC Moment Resisting Frames

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