Evaluation of Reinforced Concrete Members Damaged by Earthquakes

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.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.166-169.3110 ◽

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

Earthquake Spectra ◽

10.1177/8755293020906841 ◽

2020 ◽

Vol 36 (3) ◽

pp. 1074-1095 ◽

Cited By ~ 2

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.

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The necessity of transverse steel reinforcement for confinement in structural reinforced concrete walls using nonlinear static and dynamic analysis method

Facta universitatis - series Architecture and Civil Engineering ◽

10.2298/fuace200817012m ◽

2020 ◽

Vol 18 (2) ◽

pp. 161-175

Author(s):

Eisa Mohammad ◽

Eisa Mohammad

Keyword(s):

Reinforced Concrete ◽

Time History ◽

Nonlinear Static Analysis ◽

Concrete Walls ◽

Static And Dynamic Analysis ◽

Concrete Members ◽

Reinforced Concrete Walls ◽

Steel Bars ◽

Nonlinear Static ◽

Transverse Steel

Reinforced concrete walls are one of the most efficient and earthquake-resistant systems. In order to provide adequate performance against seismic forces, their ductility should be provided by considering some design principles. Since confining the concrete increases the ductility of the reinforced concrete members, design instructions try to increase the ductility of the wall by utilizing transverse rebars in a certain length of wall edges. In this study, the need for the transverse steel bars to apply confinement in concrete is compared with the equations suggested by previous studies for the displacement-based design of structural bearing walls. For this purpose, nonlinear static analysis and time history analysis was utilized. The results of the study indicate that the lateral deformation of the structural bearing walls is less than the final limit specified by the design codes, even without considering the transverse steel bars for concrete confinement.

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