Parameters affecting the fundamental period of RC buildings with infill walls

Köse, Mehmet Metin

doi:10.1016/j.engstruct.2008.07.017

Cited by 124 publications

(77 citation statements)

References 13 publications

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“…By comparing the fundamental periods of a fully infilled (FI) and a bare frame (BF), a difference of magnitude of about 9 is observed, which is in agreement with the literature [2]. An elastic spectrum according to the standard EC 8 [45] for ground type A was chosen, as can be seen in Fig.…”

Section: Effect Of Openings On Fundamental Periodssupporting

confidence: 65%

“…In seismic areas, ignoring the frame-infill panel interaction is not always on the safe side, since, under lateral loads, the infill walls dramatically increase the stiffness by acting as a compressed diagonal 'strut/area', resulting, thus, in a possible change of the seismic demand due to significant reduction in the natural period of the composite structural system [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Modeling of Infilled Frames With Openings

G. Asteris

2012

TOBCTJ

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Abstract:This work concerns an assessment of the behavior of infilled frames. The feasibility of possible immediate implementation of some recent developments both in analysis and design of infilled frames for practical design is investigated. It is now widely recognized that masonry infill panels used in reinforced concrete (R/C) frame structures, significantly enhance both the stiffness and the strength of the surrounding frame. However, their contribution is often not taken into account because of the lack of knowledge of the composite behaviour of the surrounding frame and the infill panel.Currently, Seismic Design Codes (EC8 -Part 1, ASCE 41-06) contain provisions for the calculation of stiffness of solid infilled frames mainly by modeling infill as a 'diagonal strut.' However, such provisions are not provided for infilled frames with openings. The present study, proposes analytical equations of the reduction factor, which is expressed as the ratio of the effective width of the diagonal strut of an infill with openings over that of the a solid infill, in order to be able to calculate the initial lateral stiffness of reinforced concrete (RC) frames with infills that have openings. The validity of the proposed equations is demonstrated by comparing our results against work done by various researchers.

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Section: Effect Of Openings On Fundamental Periodssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Modeling of Infilled Frames With Openings

G. Asteris

2012

TOBCTJ

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“…Amanat and Hoque [10] and Kose [11] have investigated parameters affecting the fundamental period of RC buildings with infill walls. Asteris et al [12] have presented a detailed and in depth analytical investigations on the parameters that affect the fundamental period of reinforced concrete structure.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the seismic behavior of infilled RC frames with opening

Tekeli

Aydın

2017

Scientia Iranica

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Abstract. Infill walls are generally not taken into account in structural analysis due to their complex behavior at seismic actions. As it is known, they increase the stiffness as well as the lateral load capacity of the system. Sometimes, infill walls may have window and door openings in their planes. In the present study, behavior of reinforced concrete (RC) frames with infill wall which have openings is investigated under cyclic lateral loadings. Location and size of the openings in the infill wall are selected as investigation parameters. Test specimens are constructed and experimentally analyzed. The infill wall changes the behavior of the frames under cyclic lateral loads significantly. Location and size openings in the infill wall are two main parameters which affect the behavior of the infill walls as well as on that of the frame. The test results clearly show that the contribution of the infill wall to the behavior of RC frame has diminished significantly when the opening ratio is larger than 9%. Therefore, the effect of the opening in the infill wall must be taken into account in the structural modeling when the opening ratio is larger than 9%.

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“…So, it is common practice that the panel and the frame of the structure to be designed separately. However, this results a possible change of the seismic demand due to the significant reduction in the natural period of the composite structural system [2][3][4]. Also, by doing so, the interaction effects between the two structural components are completely ignored.…”

Section: Introductionmentioning

confidence: 99%