Experimental evaluation of seismic performance of unbonded prestressed reinforced concrete column

2020 ◽  
Vol 208 ◽  
pp. 109913
Author(s):  
Xiaoxian Liu ◽  
Jianzhong Li ◽  
Hing-Ho Tsang ◽  
Jingfeng Wang ◽  
Jian Zhong
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Experimental Evaluation ◽  
Concrete Column ◽  
Reinforced Concrete Column

Seismic Performance of Reinforced Concrete Column-Foundation Connections Using Combo-Type Mechanical Splices

2019 ◽  
Vol 116 (5) ◽  
Author(s):  
Deuckhang Lee ◽  
Thomas H.-K. Kang ◽  
Hyunjin Ju ◽  
Sung-Woo Moon ◽  
Il-Seung Yang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Column Foundation

scholarly journals Behavior of an Innovative Square Composite Column Made of Four Steel Tubes at the Corners and Corrugated Steel Batten Plates on all Sides

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Chengquan Wang ◽  
Zou Yun ◽  
Jinxin Kang ◽  
Yuan Zhou ◽  
Ming Chen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Seismic Performance ◽  
Concrete Column ◽  
Fe Model ◽  
Reinforced Concrete Column ◽  
Steel Tubes ◽  
Composite Column ◽  
Compression Performance ◽  
Deformation Stress

Steel-concrete composite (SCC) columns have widely been applied in modern construction industry owing to the composite action between the concrete and the steel. The benefits of SCC columns can be further achieved if the confinement effect of concrete is applied. Therefore, this paper presents an innovative square steel-concrete composite (ISSCC) column made of four steel tubes at the corners and corrugated steel batten plates on all sides. Through the experimental and finite element (FE) numerical simulation calculations, the axial compression performance and seismic performance of the ISSCC column were discussed, and the FE model was verified through experimental results. The seismic performance of the ISSCC column was compared and analyzed with reinforced concrete column under different axial compression ratios. The research showed that FE models can accurately simulate the deformation, stress, and failure states of the ISSCC column under axial pressure and horizontal low cyclic load. Furthermore, the ISSCC column performed good ductility and energy dissipation capacity, and the seismic performance index was better than the reinforced concrete column and had better seismic performance. The results of this study can provide reference for the design and development of the new composite column.

Reviews Research and Development of Reinforced Concrete Column Seismic Performance Evaluation

2013 ◽  
Vol 353-356 ◽  
pp. 2079-2083
Author(s):  
Yong Ping Xie ◽  
Lei Jia ◽  
Gang Sun
Keyword(s):  
Performance Evaluation ◽  
Reinforced Concrete ◽  
Seismic Performance ◽  
Evaluation Method ◽  
Modern Technology ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Seismic Performance Evaluation ◽  
Existing Problems ◽  
Performance Evaluation Method

Column is the key member of the seismic structures. Tthe failure of column will cause a large number of casualties. With the development of modern technology, more attention on seismic performance evaluation of reinforced concrete column is paid by academics. The theoretical basis and the concepts of seismic performance evaluation of reinforced concrete column are introduced firstly, and then the existing reinforced concrete column seismic performance evaluation method, the principle and the existing problems are reviewed. Meanwhile the key problems and tendency of research of seismic performance evaluation methods are putted forward.

Enhancing seismic performance of unbonded prestressed concrete bridge column using superelastic shape memory alloy

2018 ◽  
Vol 29 (15) ◽  
pp. 3082-3096 ◽  
Author(s):  
Xiaoxian Liu ◽  
Jianzhong Li ◽  
Hing-Ho Tsang ◽  
John Wilson
Keyword(s):  
Reinforced Concrete ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Seismic Performance ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Residual Displacement ◽  
Prestressing Steel ◽  
Steel Shape ◽  
Force Ratio

In this article, an application of superelastic shape memory alloy strands for improving the seismic performance of unbonded prestressed reinforced concrete bridge column is proposed. In the reinforced concrete column with unbonded prestressing steel-shape memory alloy strands, superelastic shape memory alloy strands are put in series with unbonded steel strands, and the loading plateau of shape memory alloy is exploited to limit the increase in the axial load of column under an earthquake. Quasi-static analysis and seismic analysis were conducted to compare the seismic performance of conventional reinforced concrete column, reinforced concrete column with unbonded prestressing steel strands, and the proposed reinforced concrete column with unbonded prestressing steel-shape memory alloy strands. Result shows that reinforced concrete column with unbonded prestressing steel-shape memory alloy strands has larger ultimate displacement capacity than reinforced concrete column with unbonded prestressing steel strands in the quasi-static analysis. In the seismic analysis, reinforced concrete column with unbonded prestressing steel-shape memory alloy strands suffers from smaller earthquake residual displacement than reinforced concrete column and reinforced concrete column with unbonded prestressing steel strands. Furthermore, parametric analysis was carried out to investigate the effects of unbonded steel strand ratio, prestressing force ratio, bonded longitudinal reinforcement ratio, and maximum tensile force ratio (area of shape memory alloy strands) on the ultimate displacement and quasi-static residual displacement of reinforced concrete column with unbonded prestressing steel-shape memory alloy strands. Results show that increasing the prestressing force ratio and the maximum tensile force ratio within certain ranges can improve the self-centering capability of column. Increasing the area of bonded longitudinal reinforcement and unbonded steel strand ratio results in larger residual displacement.

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