Improving seismic performance of old-type RC frames using NSM technique and FRP jackets

2017 ◽  
Vol 147 ◽  
pp. 705-723 ◽  
Author(s):  
Ali Seifi ◽  
Abdollah Hosseini ◽  
Mohammad Sadegh Marefat ◽  
Mohammad Sajjad Zareian
Keyword(s):  
Seismic Performance ◽  
Rc Frames ◽  
Nsm Technique

Analysis of Seismic Performance of RC Frames with Centrally Reinforced Columns

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.

Seismic Performance of Earthquake-Resilient RC Frames Made with HSTC Beams and Friction Damper Devices

2021 ◽  
pp. 1-27
Author(s):  
Piero Colajanni ◽  
Lidia La Mendola ◽  
Alessia Monaco ◽  
Salvatore Pagnotta
Keyword(s):  
Seismic Performance ◽  
Friction Damper ◽  
Rc Frames

Seismic performance of non-ductile RC frames strengthened with CFRP

2019 ◽  
Vol 221 ◽  
pp. 110870 ◽  
Author(s):  
Weihong Chen ◽  
Weirong Shou ◽  
Zehui Qiao ◽  
Shuangshuang Cui
Keyword(s):  
Seismic Performance ◽  
Rc Frames

SEISMIC PERFORMANCE OF MASONRY-INFILLED RC FRAMES WITH AND WITHOUT RETROFIT

2013 ◽  
Vol 07 (03) ◽  
pp. 1350023 ◽  
Author(s):  
P. BENSON SHING ◽  
IOANNIS KOUTROMANOS ◽  
ANDREAS STAVRIDIS
Keyword(s):  
Finite Element ◽  
Seismic Performance ◽  
Numerical Study ◽  
Critical Role ◽  
Finite Element Models ◽  
Shake Table ◽  
Shake Table Tests ◽  
Rc Frames ◽  
Infilled Rc Frames ◽  
Masonry Infilled Rc Frames

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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