A new damage factor for seismic assessment of deficient bare and FRP-retrofitted RC structures

2021 ◽  
Vol 248 ◽  
pp. 113152
Author(s):  
George Markou ◽  
Reyes Garcia ◽  
Christos Mourlas ◽  
Maurizio Guadagnini ◽  
Kypros Pilakoutas ◽  
...  
Keyword(s):  
Seismic Assessment ◽  
Damage Factor ◽  
Rc Structures

scholarly journals Investigation of Residual Bearing Capacity of Corroded Reinforced Concrete Short Columns under Impact Load Based on Nondestructive Testing

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Guorui Sun ◽  
Yi Zhang ◽  
Yubin Tian ◽  
Lizhuang Bo ◽  
Jiyang Shen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Nondestructive Testing ◽  
Corrosion Rate ◽  
Bearing Capacity ◽  
Impact Load ◽  
Influence Factors ◽  
Impact Loads ◽  
Damage Factor ◽  
Rc Structures ◽  
Short Columns

This paper investigates the damage and residual bearing capacity of corroded reinforced concrete (RC) short columns after impact and presents a method for evaluating the residual bearing capacity of RC short columns by nondestructive testing. Firstly, accelerated corrosion test and drop hammer impact test were carried out to obtain specimens under different impact loads and corrosion rates. Then, the damage caused by corrosion and impact loads was evaluated by supersonic wave aided nondestructive test. Through the damage factor, the influence of corrosion rate and impact loads on the specimen was revealed, and the calculation method of corrosion rate and impact velocity was proposed. Finally, according to the bearing capacity test results, the influence factors of reinforcement, concrete, and impact were introduced into the bearing capacity calculation equation. Considering the relationship between the residual bearing capacity of RC short columns and the damage factor, an improved formula for calculating the residual bearing capacity of corroded RC short columns under impact loads was proposed. This work lays the foundation for further research on mechanical properties of corroded RC structures under impact loads.

scholarly journals Seismic assessment of low ductile RC structures: buildings from before the modern seismic codes

2016 ◽  
Vol 33 (4) ◽  
pp. 1282-1307
Author(s):  
João Dias-Oliveira ◽  
H Rodrigues ◽  
Humberto Varum
Keyword(s):  
Local Level ◽  
Time History ◽  
Linear Analysis ◽  
Seismic Assessment ◽  
Seismic Safety ◽  
Content Type ◽  
Rc Structures ◽  
Infill Panels ◽  
Non Linear

Purpose – When a numerous amount of buildings was built in reinforced concrete, in a period when the regulations did not have the design philosophy for the occurrence of earthquakes, it is of extreme importance to carry out full and effective structural assessments, specially considering and comparing bare frame and infilled structure. The paper aims to discuss these issues. Design/methodology/approach – Among several possibilities to make the evaluation as, simplified, linear analysis and static non-linear analysis, the non-linear dynamic can provide the most accurate numerical behaviour compared to the real one. The time-history non-linear analyses are developed on the software SeismoStruct for different levels of intensity. Local verifications are then applied separately from both Eurocode and Italian Code. Findings – The application of validated models for the analysis of real buildings allows a complete seismic assessment. The level of uncertainty increases integrating particularities regarding the infill masonry walls. The paper shows important global and local seismic safety for these complex typology of buildings. Originality/value – A representative common concrete structure without seismic provisions is first analysed and discussed in terms of global behaviour, deformations and progression of forces. The case study structure is considered both as bare structure and with integrated infill panels. It is also discussed in a local level, about brittle and ductile mechanisms, and extra comparisons between different interpretations of different standards. The case study structure is considered both as bare structure and with integrated infill panels.

Seismic assessment of existing RC structures affected by degradation phenomena

2009 ◽  
Vol 31 (4) ◽  
pp. 284-297 ◽  
Author(s):  
Luisa Berto ◽  
Renato Vitaliani ◽  
Anna Saetta ◽  
Paola Simioni
Keyword(s):  
Seismic Assessment ◽  
Rc Structures

State of Development of Seismic Retrofit of RC Structures with Post-Installed Plate-Anchored Shear Reinforcement

2018 ◽  
Vol 56 (7) ◽  
pp. 570-578
Author(s):  
A. Hata ◽  
K. Kawamura ◽  
W. Zhao ◽  
M. Chujo
Keyword(s):  
Seismic Retrofit ◽  
Shear Reinforcement ◽  
Rc Structures
Sign in / Sign up

Export Citation Format

Share Document