Seismic performance and failure mechanisms of infilled RC frames : numerical simulation and theoretical modelling

This paper presents the findings of a research that focused on the seismic performance of masonry-infilled, nonductile, RC frames. This research has resulted in improved analytical methods and effective retrofit techniques to assess and enhance the performance of these structures. The methods were validated by a series of quasi-static tests conducted on one-story frame specimens as well as shake-table tests conducted on two 2/3-scale, three-story, two-bay, masonry-infilled, RC frames. This paper focuses on the observations from the shake-table tests and the further insight gained from a numerical study conducted with finite element models. The first shake-table test specimen had no retrofit measures, and the second had infill walls in the first and second stories strengthened with Engineered Cementitious Composite (ECC) and Fiber Reinforced Polymeric (FRP) overlays, respectively. The tests demonstrated the effectiveness of the retrofit measures. Finite element models that combine smeared and discrete cracks have been used in a numerical study to examine the benefits of the ECC retrofit and the influence of the capacity of the shear dowels that connect an ECC overlay to the RC beams on structural performance. It has been shown that these shear dowels play a critical role in enhancing both the strength and ductility of a retrofitted structure.

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Seismic Performance Evaluation of Hexagonal Blocks Infilled RC Frames

Journal of the Korea institute for structural maintenance inspection ◽

10.11112/jksmi.2011.15.4.116 ◽

2011 ◽

Vol 15 (4) ◽

pp. 116-124

Author(s):

Kug Kwan Chang ◽

Dae Won Seo ◽

Tae Hyun Ko

Keyword(s):

Performance Evaluation ◽

Seismic Performance ◽

Seismic Performance Evaluation ◽

Rc Frames ◽

Infilled Rc Frames

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Seismic performance of infilled RC frames with steel corrugated shear walls

Magazine of Concrete Research ◽

10.1680/jmacr.18.00328 ◽

2020 ◽

Vol 72 (11) ◽

pp. 541-551 ◽

Cited By ~ 1

Author(s):

Ningning Feng ◽

Changsheng Wu ◽

Pingzhou Cao

Keyword(s):

Seismic Performance ◽

Shear Walls ◽

Rc Frames ◽

Infilled Rc Frames

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Seismic performance of brick masonry infilled frame structures with bed joint reinforcements

E3S Web of Conferences ◽

10.1051/e3sconf/202015603004 ◽

2020 ◽

Vol 156 ◽

pp. 03004

Author(s):

Maidiawati ◽

Jafril Tanjung ◽

Yulia Hayati ◽

Agus ◽

Satria Rangga

Keyword(s):

Seismic Performance ◽

Frame Structure ◽

Frame Structures ◽

Rc Frame ◽

Infilled Frame ◽

Rc Frames ◽

Lateral Strength ◽

Plane Direction ◽

Infilled Rc Frames ◽

Reversed Cyclic

This paper presents the evaluation of the seismic performance of brick infilled RC frame structures with bed joint reinforcements based on reversed cyclic lateral load tests. Three specimens of the structural model of 1/4 scale-down single-story single-bay brick infilled RC frame was prepared, which were brick infilled RC frames with and without bed joint reinforcements. Two specimens of brick infills with bed joint reinforcements were different in the spacing of bed joint rebars. The specimens were tested by applying a reversed cyclic lateral loading in-plane direction. During the tests, the crack propagation was observed at the peak and residual drifts of each loading cycle to recognize the failure mechanisms of the specimens. As the results, although the use of the bed joint reinforcements ineffective to increase the lateral strength of the overall infilled frame structure. The rebars in mortar bed joints role to sustain the lateral strength in plastic deformation, and provide the whole structure with high ductility. It seemed that the rebars in mortar bed joints confined the brick infills. Therefore, the infilled RC frames can survive in large deformation without failure of the infills in out of the plane direction.

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Behavior and failure mechanisms of masonry-infilled RC frames (in low-rise buildings) subject to lateral loading

Engineering Structures ◽

10.1016/j.engstruct.2015.12.034 ◽

2016 ◽

Vol 111 ◽

pp. 233-245 ◽

Cited By ~ 38

Author(s):

Syed Humayun Basha ◽

Hemant B. Kaushik

Keyword(s):

Failure Mechanisms ◽

Lateral Loading ◽

Rc Frames ◽

Infilled Rc Frames ◽

Masonry Infilled Rc Frames

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Analysis of Seismic Performance of RC Frames with Centrally Reinforced Columns

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.1319 ◽

2013 ◽

Vol 671-674 ◽

pp. 1319-1323

Author(s):

Zi Xue Lei ◽

Yu Hang Han ◽

San Sheng Dong ◽

Jun Qing Guo

Keyword(s):

Seismic Performance ◽

Cross Sections ◽

Carrying Capacity ◽

Pushover Analysis ◽

Seismic Load ◽

Load Carrying Capacity ◽

Rc Columns ◽

Rc Column ◽

Rc Frames ◽

Load Carrying

A centrally reinforced column is a new type of RC columns, formed by providing a reinforcement skeleton at the central part of the cross section of an ordinary RC column. Tests have shown that as compared with an ordinary RC column, this type of columns has a higher load carrying capacity and ductility. From the pushover analysis of a frame composed of ordinary RC columns and one consisting of centrally reinforced columns, their seismic performance under seismic load of 9-degree intensity was studied according to Chinese code, including target displacements, story-level displacements, interstory drifts, appearance and development of plastic hinges. The results indicate that although the dimensions of cross sections of columns in the frame with centrally reinforced columns are smaller than those of the ordinary frame, the former still has a higher overall load carrying capacity and seismic performance than the latter.

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