Effect of Masonry Infill Panels on the Seismic Response of Reinforced Concrete Frame Structures

Abstract

The present work concerns the numerical investigation of reinforced concrete frame buildings containing masonry infill panel under seismic loading that are widely used even in high seismicity areas. In seismic zones, these frames with masonry infill panels are generally considered as higher earthquake risk buildings. As a result there is a growing need to evaluate their level of seismic performance. The numerical modelling of infilled frames structures is a complex task, as they exhibit highly nonlinear inelastic behaviour, due to the interaction of the masonry infill panel and the surrounding frame. The available modelling approaches for masonry infill can be grouped into two principal types; Micro models and Macro models. A two dimensional model of the structure is used to carry out non-linear static analysis. Beams and columns are modelled as non-linear with lumped plasticity where the hinges are concentrated at both ends of the beams and the columns. This study is based on structures with design and detailing characteristics typical of Algerian construction model. In this regard, a non-linear pushover analysis has been conducted on three considered structures, of two, four and eight stories. Each structure is analysed as a bare frame and with two different infill configurations (totally infilled, and partially infilled). The main results that can be obtained from a pushover analysis are the capacity curves and the distribution of plastic hinges in structures. The addition of infill walls results in an increase in both the rigidity and strength of the structures. The results indicate that the presence of non-structural masonry infills can significantly modify the seismic response of reinforced concrete "frames". The initial rigidity and strength of the fully filled frame are considerably improved and the patterns of the hinges are influenced by structural elements type depending on the dynamic characteristics of the structures. Doi: 10.28991/cej-2021-03091764 Full Text: PDF

Pengaruh Dinding Bata Bertulang Terhadap Kinerja Struktur Rangka Dengan Dinding Pengisi (Infilled Frame)

“…Beberapa penelitian yang ada saat ini telah membahas metode pemodelan untuk menentukan kinerja dinding pengisi yaitu secara makro dengan pemodelan dinding pengisi menggunakan metode strut diagonal dan secara mikro yaitu dinding pengisi diasumsikan sebagai elemen bidang dengan bidang kontak antara dinding dan rangka disebut elemen interface [4]- [7]. Kinerja dan perilaku struktur dapat meningkat ketika dinding diperhitungkan dalam struktur dibandingkan dengan struktur rangka terbuka.…”

“…Besarnya beban gempa dari sebuah struktur dapat dikurangi sesuai dengan tingkat daktilitas yang diperhitungkan dalam proses desain. Faktor reduksi beban gempa ini dapat diambil sesuai dengan Persamaan (4).…”

Seismic Behavior of Reinforced Masonry Structure: Relation between the Behavior Factor and the Ductility

“…The purpose of these requirements is not only to ensure the resistance to the horizontal forces taken into account in calculations, such as those resulting from the action of the earthquake, but also to enable buildings to withstand, without undue damage, the effects of certain stresses, such as localized explosions [1,2]. The damage encountered in structures under seismic loading differs according to the type of bracing chosen [3,4], the metal bracing, reinforced concrete, or reinforced masonry cited in the seismic code [5][6][7], which is characterized by its coefficient of behavior [8,9], its energy dissipation capacity, and its ductility [10]. When seismic solicitations are important, the lack of ductility makes the structures vulnerable to rupture.…”

Effects of Infill Panels with Various Configurations on the Non-Linear Dynamic Responses of Reinforced Concrete Structures

“…The results showed that the infill panels reduced the roof acceleration, displacement, and story drift ratios by 77.5%, 78.6%, and 82.9%, respectively, increased the percentage of elastic energy, and decreased the percentage ratio of inelastic energy in the isolated building. Zine et al [13] applied pushover analysis to three structures with 2, 4, and 8 stories. Each structure was examined as a bare frame with two different infill panel distributions, completely or partially.…”