Assessment of seismic damage of thin and lightly reinforced concrete walls using fractal dimension of cracking

2016 ◽  
Vol 46 (4) ◽  
pp. 661-675 ◽  
Author(s):  
Julian Carrillo ◽  
William Avila
Keyword(s):  
Fractal Dimension ◽  
Reinforced Concrete ◽  
Seismic Damage ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Lightly Reinforced Concrete

Experimental study of lightly reinforced concrete walls upgraded with various schemes under seismic loading

2017 ◽  
Vol 138 ◽  
pp. 131-145 ◽  
Author(s):  
Eko Yuniarsyah ◽  
Susumu Kono ◽  
Masanori Tani ◽  
Rafik Taleb ◽  
Hidekazu Watanabe ◽  
...  
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Seismic Loading ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Lightly Reinforced Concrete

Response of thin lightly-reinforced concrete walls under cyclic loading

2018 ◽  
Vol 176 ◽  
pp. 175-187 ◽  
Author(s):  
Carlos A. Blandon ◽  
Carlos A. Arteta ◽  
Ricardo L. Bonett ◽  
Julian Carrillo ◽  
Katrin Beyer ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Lightly Reinforced Concrete

scholarly journals Seismic performance of repaired lightly-reinforced concrete walls

2017 ◽  
Vol 50 (4) ◽  
pp. 574-585
Author(s):  
Christopher J. Motter ◽  
Aaron B. Clauson ◽  
James C. Petch ◽  
Matias A. Hube ◽  
Richard S. Henry ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Central Business District ◽  
Elastic Stiffness ◽  
Concrete Walls ◽  
Concrete Buildings ◽  
Reinforced Concrete Walls ◽  
Repair Mortar ◽  
Residual Capacity ◽  
Business District ◽  
Lightly Reinforced Concrete

As a result of the 2010-2011 Canterbury earthquakes, over 60% of the concrete buildings in the Christchurch Central Business District have been demolished. This experience has highlighted the need to provide guidance on the residual capacity and repairability of earthquake-damaged concrete buildings. As limited testing has been performed on repaired components, this study focuses on the performance of severely-damaged lightly-reinforced concrete walls repaired through replacement of reinforcement and concrete in the damaged region. The damage prior to repair included buckling and fracture of longitudinal reinforcement, crushing and spalling of concrete, and, for one of the two specimens, out-of-plane instability of the gross section. Prior to repairing the wall specimens, tensile testing of reinforcement with welded connections was conducted to verify acceptable performance of welds suitable for reinstating the damaged reinforcement. Repairs to the specimens consisted of removal of damaged concrete through either hydro-demolition or jack hammering, followed by cutting and removal of damaged reinforcement and reinstatement of new reinforcement and repair mortar. The two repaired wall specimens were tested using a standard protocol that was identical to that used for one of the two original wall specimens. Aside from a difference in the elastic stiffness, the load-deformation responses of the repaired specimens were similar to that of the originally-tested specimen through to the first loading cycle at 2.0% drift, beyond which strength degradation was more pronounced for the repaired specimens. The overall performance of the repaired walls relative to the original wall indicates that it is feasible to achieve acceptable performance of severely-damaged concrete walls repaired through replacement of reinforcement and concrete in the damaged region.

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