Seismic performance of squat thin reinforced concrete walls for low-rise constructions

2020 ◽  
Vol 36 (3) ◽  
pp. 1074-1095 ◽  
Author(s):  
Matías A Hube ◽  
Hernán Santa María ◽  
Orlando Arroyo ◽  
Alvaro Vargas ◽  
Javier Almeida ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Latin American ◽  
Seismic Behavior ◽  
Nonlinear Models ◽  
Single Layer ◽  
Experimental Results ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Web Reinforcement

Thin reinforced concrete (RC) walls with single layer reinforcement have been used for houses and buildings in several Latin American countries. Although some design codes include recommendations for squat thin walls in low-rise constructions, its seismic performance has not been validated adequately in past earthquakes. This article presents the results of an experimental campaign of nine full-scale specimens conducted to characterize the influence of the steel type, the reinforcement ratio, and the wall thickness on the seismic behavior of squat thin RC walls with single layer reinforcement. Both welded wire and deformed bars were used as web reinforcement. Experimental results are used to develop nonlinear models to assess the seismic behavior of a prototype two-story house with welded wire reinforcement and deformed bars by means of incremental dynamic analyses. The experimental results show that the type of steel has the largest influence on wall seismic performance. The numerical results suggest that RC walls with single layer reinforcement are suitable for housing applications up to two stories in high seismicity regions, particularly walls detailed with deformed bars.

Shaking table test of reinforced concrete coupled shear walls with single layer of web reinforcement and inclined steel bars

2018 ◽  
Vol 21 (15) ◽  
pp. 2282-2298 ◽  
Author(s):  
Jianwei Zhang ◽  
Wenbin Zheng ◽  
Cheng Yu ◽  
Wanlin Cao
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Shaking Table Test ◽  
Single Layer ◽  
Shear Walls ◽  
Shaking Table ◽  
Large Hole ◽  
Steel Bars ◽  
Web Reinforcement ◽  
Opening Ratio

In this study, five 1/4 scaled shaking table tests were conducted to investigate the seismic performance of reinforced concrete coupled shear walls with single layer of web reinforcement and inclined steel bars. The five tested coupled shear walls included three models with normal opening ratio (19%) and two models with large hole ratio (27%). The three models with normal opening included one model with single layer of web reinforcement, two models with single layer of web reinforcement and 75° inclined steel bars in the limbs’ web or at the bottom. Two reinforced concrete coupled shear walls with large hole and single row of reinforcements also were tested with inclined reinforcements or without them. The dynamic characteristics, dynamic response, and failure mode of each model were compared and analyzed. The test and analysis results demonstrate that the inclined steel bars are identified as an efficient means of limiting overall deformation, increasing energy dissipation, and reducing the possible damage by earthquake for reinforced concrete coupled shear walls with single layer of web reinforcement. Thus, reinforced concrete coupled shear walls with inclined steel bars have better seismic performance than reinforced concrete coupled shear walls without inclined steel bars. With appropriate design, reinforced concrete coupled shear walls with single layer of web reinforcement and inclined steel bars can be applied in multi-story buildings.

Seismic behavior of slender reinforced concrete walls

2014 ◽  
Vol 80 ◽  
pp. 377-388 ◽  
Author(s):  
M.A. Hube ◽  
A. Marihuén ◽  
J.C. de la Llera ◽  
B. Stojadinovic
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Concrete Walls ◽  
Reinforced Concrete Walls

Evaluation of Reinforced Concrete Members Damaged by Earthquakes

1996 ◽  
Vol 12 (3) ◽  
pp. 457-478 ◽  
Author(s):  
Robert D. Hanson
Keyword(s):  
Reinforced Concrete ◽  
Experimental Results ◽  
Structural System ◽  
Concrete Walls ◽  
Lateral Capacity ◽  
Concrete Members ◽  
Reinforced Concrete Walls ◽  
Crack Repair ◽  
Seismic Repair ◽  
Repair Techniques

A number of building authorities have included or are proposing to include loss in lateral capacity of the structural system caused by earthquake damage as a basis for requiring specific degrees of seismic repair and upgrades of the damaged members or of the entire structural system. Attempts have been made to apply this criteria through the size of cracks in reinforced concrete walls. This paper reviews experimental results which demonstrate that size of wall crack is not directly related to a reduction in wall capacity. The effectiveness of various wall crack repair techniques on restoring wall characteristics is discussed.

Experimental study and numerical model calibration of full-scale superimposed reinforced concrete walls with I-shaped cross sections

2016 ◽  
Vol 19 (12) ◽  
pp. 1902-1916 ◽  
Author(s):  
Xun Chong ◽  
Linlin Xie ◽  
Xianguo Ye ◽  
Qing Jiang ◽  
Decai Wang
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Numerical Model ◽  
Seismic Performance ◽  
Cross Sections ◽  
Concrete Wall ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Wall Panels ◽  
Reinforced Concrete Wall

The superimposed reinforced concrete wall in which both the walls and slabs are semi-precast superimposed reinforced concrete components has been widely used to construct high-rise residential buildings in some seismic regions of China. This article aims to investigate the seismic performance and reveal the inherent damage mechanism of this wall. Quasi-static tests of two full-scale superimposed reinforced concrete walls with I-shaped cross sections, consisting of the walls in orthogonal directions and two T-shaped cast-in-place boundary elements, were conducted. Through the test, the behavior of the horizontal joints between the wall panels and the foundation; the behavior of the vertical connections between the wall panels of orthogonal direction; the reliability of the connections between precast and cast-in-place concrete; and the lateral load, deformation, and energy dissipation capacities of the specimens are evaluated. In addition, a refined numerical model based on the multi-spring model was adopted to assess the seismic performance of the superimposed reinforced concrete walls with I-shaped cross sections. The reliability of this model was validated through comparison with the experimental data. This study offers valuable experimental data and numerical model references for future seismic performance assessments of superimposed reinforced concrete wall structures.

Study on Moment-Curvature Hysteresis Relationship of Reinforced Concrete Shear Walls

2012 ◽  
Vol 166-169 ◽  
pp. 3110-3113
Author(s):  
Guang Qiang Zhou ◽  
Feng Min Xia
Keyword(s):  
Reinforced Concrete ◽  
Shear Walls ◽  
Experimental Results ◽  
Model Fit ◽  
Hysteresis Model ◽  
Concrete Walls ◽  
Modified Model ◽  
Hysteresis Curves ◽  
Reinforced Concrete Walls ◽  
Relationship Of

In order to study and improve moment-curvature hysteresis model of reinforced concrete shear walls, experiment of reinforced concrete shear walls was conducted. Based on experiment of reinforced concrete shear walls, moment-curvature relationship is deduced and moment-curvature hysteresis curves are obtained. The existing moment-curvature hysteresis models of reinforced concrete walls are discussed and improved, and the calculated moment-curvature hysteresis curves with the modified model fit well with experimental results.

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