INVESTIGATION OF THE STRENGTH-DUCTILITY-TYPE SEISMIC RETROFITTING TECHNIQUE FOR EXISTING RC COLUMNS USING PC BAR PRESTRESSING AND STEEL PLATES

2020 ◽  
Vol 85 (778) ◽  
pp. 1633-1642
Author(s):  
Kozo NAKADA ◽  
Tetsuo YAMAKAWA ◽  
Kazuo KANEDA ◽  
Masayuki KUROKI ◽  
Mohammad Zahid NOORI ◽  
...  
Keyword(s):  
Steel Plates ◽  
Seismic Retrofitting ◽  
Rc Columns

Opportunities of light jacketing with Fibre Reinforced Cementitious Composites for seismic retrofitting of existing RC columns

2021 ◽  
pp. 113717
Author(s):  
Marta Del Zoppo ◽  
Costantino Menna ◽  
Marco Di Ludovico ◽  
Domenico Asprone ◽  
Andrea Prota
Keyword(s):  
Seismic Retrofitting ◽  
Cementitious Composites ◽  
Rc Columns

scholarly journals FLEXURAL STRENGTH OF THE STRENGTH-DUCTILITY TYPE SEISMIC RETROFIT TECHNIQUE OF RC COLUMNS USING PC BAR PRESTRESSING AND STEEL PLATES

2020 ◽  
Vol 85 (767) ◽  
pp. 97-104 ◽  
Author(s):  
Kozo NAKADA ◽  
Tetsuo YAMAKAWA ◽  
Pasha JAVADI ◽  
Mohammad Zahid NOORI ◽  
Kazuo KANEDA
Keyword(s):  
Flexural Strength ◽  
Seismic Retrofit ◽  
Steel Plates ◽  
Rc Columns

scholarly journals A Development on Seismic Retrofitting System for RC Column using Divided Steel Plates

2006 ◽  
Vol 44 (8) ◽  
pp. 30-38
Author(s):  
M. Okano ◽  
T. Naganawa ◽  
A. Komatsu ◽  
H. Aikyou
Keyword(s):  
Steel Plates ◽  
Seismic Retrofitting ◽  
Rc Column

Seismic Performance of Existing R/C Frames Strengthened by Steel Plate Shear Walls

2012 ◽  
Vol 193-194 ◽  
pp. 1470-1475 ◽  
Author(s):  
Marco Valente
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Structural Damage ◽  
Steel Plate ◽  
Shear Walls ◽  
Steel Plates ◽  
Seismic Retrofitting ◽  
Steel Plate Shear Walls ◽  
Steel Panel ◽  
Steel Panels

This study investigates an innovative method based on low yield steel plate shear walls for seismic retrofitting of existing reinforced concrete (R/C) structures. A simplified numerical model of steel shear panels is developed for global analyses of multi-story R/C frames. The seismic performance of a non-ductile five-story R/C frame retrofitted with steel plate shear walls is evaluated in terms of drift control and energy dissipation capacity using nonlinear dynamic analyses. The results obtained by the application of two different story-wise distributions of steel plates are compared. In case of retrofitted frames a considerable decrease of the maximum top displacements is registered and the energy dissipated by the primary structural elements is significantly reduced for severe seismic actions. The energy dissipation concentrates in the steel panels, reducing the plastic demand on the structural members, along with the potential for structural damage. The different story-wise distributions of the steel panels change the damage distribution throughout the frame. The uniform arrangement of the steel panel thickness along the height of the frame causes a concentration of damage in the columns of the first story. In case of steel panel distribution proportional to story shear, the energy dissipation results more uniform over the height of the frame and a significant decrease of damage is registered for the columns of all the storeys.

scholarly journals Strengthening Design of RC Columns with Direct Fastening Steel Jackets

2021 ◽  
Vol 11 (8) ◽  
pp. 3649
Author(s):  
Zhiwei Shan ◽  
Lijie Chen ◽  
Kun Liang ◽  
Ray Kai Leung Su ◽  
Zhao-Dong Xu
Keyword(s):  
Flexural Strength ◽  
Load Capacity ◽  
Design Procedure ◽  
Load Ratio ◽  
High Strength ◽  
Lateral Load ◽  
Steel Plates ◽  
Flexural Stiffness ◽  
Rc Columns ◽  
Strengthening Method

For non-seismically designed columns with insufficient strength and flexural stiffness, intense inter-story drift can be incurred during a strong earthquake event, potentially leading to the collapse of the entire building. Existing strengthening methods mainly focus on enhancing axial or flexural strength but not the flexural stiffness of columns. In response, a novel direct fastening steel jackets that can increase both flexural strength and stiffness is introduced. This novel strengthening method features straightforward installation and swift strengthening as direct fastening is used to connect steel plates together to form a steel jacketed column. This new connection method can quickly and stably connect two steel components together by driving high strength fasteners into them. In this paper, the design procedure of RC columns strengthened with this novel strengthening method is originally proposed, which includes five steps: (1) estimating lateral load capacity of damaged RC columns; (2) determining connection spacing of steel jacket; (3) estimating the lateral load capacity of strengthened RC column; (4) evaluating the axial load ratio (ALR) of strengthened RC columns; and (5) estimating effective stiffness of strengthened RC columns. Lastly, an example is presented to illustrate the application of the proposed design procedure.

Sign in / Sign up

Export Citation Format

Share Document