In-plane cyclic testing of full-scale reinforced concrete frames with innovative isolated infill walls strengthened by highly ductile concrete

Lyu, Hao; Deng, Mingke; Han, Yagang; Ma, Fei; Zhang, Yangxi

doi:10.1016/j.jobe.2022.104934

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…While these solutions indeed offer wall panels with commendable ductility and mitigate damage compared to conventional infill walls with door openings, they still exhibit undesirable corner crushing and crack development in the infill walls surrounding the door openings once the inter‐story drift ratio higher than 3.0% 63–65 . Consequently, supplementary fixtures are often deemed necessary to safeguard both the infill wall and door opening 66–68 . The principal reason is that the introduction of door openings disrupts the working mechanism and force transmission mechanism of these infill systems 69 .…”

Section: Introductionmentioning

confidence: 99%

“…[63][64][65] Consequently, supplementary fixtures are often deemed necessary to safeguard both the infill wall and door opening. [66][67][68] The principal reason is that the introduction of door openings disrupts the working mechanism and force transmission mechanism of these infill systems. 69 As a result, the activation of the detrimental multiple-diagonal strut effect, which is dispersed surrounding the door openings, leads to escalated damage to both the infill walls and door openings.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and analytical studies of infill wall with sliding joints considering a door opening

Huang,

Niu,

Zhang

et al. 2024

Earthq Engng Struct Dyn

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Semi‐rigid steel frame stands out due to its remarkable deformation capability under seismic loading, while the introduction of partitioned walls would disturb the expected seismic behavior of the infilled steel frames. Furthermore, the presence of door openings might exacerbate these negative effects. To mitigate the detrimental multiple‐diagonal strut effect of traditional infill walls around the door opening, an innovative low‐damage wall panels system: prefabricated infill wall panels with a door opening and sliding joints are presented for semi‐rigid steel frames. For testifying the effectiveness of the proposed structure, a quasi‐static test was carried out on three half‐scaled steel frames: a bare frame, a frame infilled with conventional wall panels with a door opening, and a frame infilled with the novel wall panel system with a door opening. Experimental results reveal that the developed innovative wall panels with a door opening could avoid unfavorable crack developments and opening deformation around the door area. It is mainly attributed to the releasement of the adverse multiple‐diagonal strut mechanism of traditional wall panels with door openings. Thus, the presented infilled frame showcases seismic performance similar to the bare steel frame, while having a higher energy dissipation capacity. Moreover, the developed analytical prediction method based on the superposition principle could accurately estimate the lateral load‐carrying capacity of the structures. Due to negligible deformation of the both bottom infill wall panel and the door opening, the innovative infill wall only contributes about 10% lateral load‐carrying capability to the infilled frame.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and analytical studies of infill wall with sliding joints considering a door opening

Huang,

Niu,

Zhang

et al. 2024

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

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“…However, even with infills of uniform distribution, several low-rise frame types are vulnerable to the negative infill effect [20]. Furthermore, innovative systems were proposed to enhance the infill-column interaction, such as retrofitting the infill walls with highly ductile concrete layers in 2022 [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Infills on the Response Modification Factor for Infilled Reinforced Concrete Frame Buildings

Helmy,

Okail,

Zidan

2023

Civ Eng J

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RC frames with unreinforced masonry infill walls are the most common type of building. Unreinforced masonry walls are often not considered by engineers in the design process, although walls and frames interact during strong ground motion, leading to structural responses deviating radically from what is expected in the design. Under lateral load, reinforced concrete confining members (frames) act in tension or compression, depending on the direction of the lateral seismic pressures. Meanwhile, masonry walls act as diagonal struts prone to compression. This research aims to develop the effect of masonry infills and their distribution on the value of the resulting response modification factor. For this purpose, a parametric study was performed on five, seven, and ten-story' buildings modeled as bare and infilled frames. Infill ratio, panel aspect ratio, unidirectional eccentricity, and bidirectional eccentricities were the parameters investigated. Each proposed model's resulting response modification factor was compared to the value cited in different international codes. It was concluded that this value differs depending on several parameters and cannot be constant for a certain structural system. The novelty of this research is the deduction of a general equation to calculate the response modification factor as a function of the percentage of infills and the eccentricity, while presenting two different methods to calculate it. Doi: 10.28991/CEJ-2023-09-12-09 Full Text: PDF

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“…In the last years, several studies have been conducted to reduce the impact of an earthquake on RC structures at the building scale using base isolation [6,7] or smart dissipating devices for example [8], or with local strategies at the infill panel level, such as seismic infill wall isolation [9][10][11][12], however, this advanced technique is not available yet in the current practice.…”

Section: Introductionmentioning

confidence: 99%

Influence of Masonry Infill Wall Position and Openings in the Seismic Response of Reinforced Concrete Frames

et al. 2022

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It is now widely recognized that the masonry infill frame used in reinforced concrete structures (RC) greatly enhances both the rigidity and strength of the surrounding frame. The lateral loading behavior of this RC frame is different from the frame without infill, although the structural contribution of infill walls is discarded in many countries, including Algeria. This paper aims to focus on the effect of openings and the effect of changing the distribution of masonry panels on the global behavior of buildings. For this, a pushover analysis is carried out to evaluate the seismic performance and assess the behavior of infilled RC, and to study the results related to capacity curve, inter-story drift and energy. The results obtained show that the effect of the openings and changing of the distribution of masonry panels can drastically change the overall behavior of the structures regarding enhancing strength capacities and energy absorption. Noticeable remarks in terms of distributing masonry panels within a frame are observed and several recommendations concerning the present practice might be important to be considered.

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In-plane cyclic testing of full-scale reinforced concrete frames with innovative isolated infill walls strengthened by highly ductile concrete

Cited by 7 publications

References 28 publications

Experimental and analytical studies of infill wall with sliding joints considering a door opening

Experimental and analytical studies of infill wall with sliding joints considering a door opening

Effect of Infills on the Response Modification Factor for Infilled Reinforced Concrete Frame Buildings

Influence of Masonry Infill Wall Position and Openings in the Seismic Response of Reinforced Concrete Frames

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