Seismic performance of infilled RC frames with steel corrugated shear walls

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

10.14711/thesis-b1198243 ◽

2012 ◽

Author(s):

Yu Ping Yuen

Keyword(s):

Numerical Simulation ◽

Seismic Performance ◽

Failure Mechanisms ◽

Theoretical Modelling ◽

Rc Frames ◽

Infilled Rc Frames

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Seismic performance of precast shear walls prestressed via post-tensioned high strength bars placed inside grouted corrugated pipes

Engineering Structures ◽

10.1016/j.engstruct.2021.112153 ◽

2021 ◽

Vol 237 ◽

pp. 112153

Author(s):

Qing Zhi ◽

Liqun Kang ◽

Lu Jia ◽

Jingang Xiong ◽

Zhengxing Guo

Keyword(s):

Seismic Performance ◽

Shear Walls ◽

High Strength ◽

Post Tensioned

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Experimental Investigation into the Seismic Performance of Prefabricated Reinforced Masonry Shear Walls with Vertical Joint Connections

Applied Sciences ◽

10.3390/app11104421 ◽

2021 ◽

Vol 11 (10) ◽

pp. 4421

Author(s):

Zhiming Zhang ◽

Fenglai Wang

Keyword(s):

Seismic Performance ◽

Cross Sections ◽

Shear Walls ◽

Construction Method ◽

Shear Capacity ◽

Initial Stiffness ◽

Equivalent Viscous Damping ◽

Displacement Ductility ◽

Reinforced Masonry ◽

Cracking Performance

In this study, four single-story reinforced masonry shear walls (RMSWs) (two prefabricated and two cast-in-place) under reversed cyclic loading were tested to evaluate their seismic performance. The aim of the study was to evaluate the shear behavior of RMSWs with flanges at the wall ends as well as the effect of construction method. The test results showed that all specimens had a similar failure mode with diagonal cracking. However, the crack distribution was strongly influenced by the construction method. The lateral capacity of the prefabricated walls was 12% and 27% higher than that of the corresponding cast-in-place walls with respect to the rectangular and T-shaped cross sections. The prefabricated walls showed better post-cracking performance than did the cast-in-place wall. The secant stiffness of all the walls decreased rapidly to approximately 63% of the initial stiffness when the first major diagonal crack was observed. The idealized equivalent elastic-plastic system showed that the prefabricated walls had a greater displacement ductility of 3.2–4.8 than that of the cast-in-place walls with a displacement ductility value of 2.3–2.7. This proved that the vertical joints in prefabricated RMSWs enhanced the seismic performance of walls in shear capacity and ductility. In addition, the equivalent viscous damping of the specimens ranged from 0.13 to 0.26 for prefabricated and cast-in-place walls, respectively.

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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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