Seismic performance of reinforced concrete buildings in the September 2010 Darfield (Canterbury) earthquake

2010 ◽  
Vol 43 (4) ◽  
pp. 340-350 ◽  
Author(s):  
Weng Y. Kam ◽  
Stefano Pampanin ◽  
Rajesh Dhakal ◽  
Henri P. Gavin ◽  
Charles Roeder
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Reinforced Concrete Buildings ◽  
Rc Buildings ◽  
Ground Failure ◽  
Reinforced Concrete Building ◽  
Concrete Buildings ◽  
High Rise ◽  
Concrete Building ◽  
Structural Engineers

This paper describes observations of damage to reinforced concrete buildings from the September 2010 Darfield (Canterbury) earthquakes. Data was collated from first-hand earthquake reconnaissance observations by the authors, post-earthquake surveys, and communications and meetings with structural engineers in Christchurch. The paper discusses the general performance of several reinforced concrete building classes: pre-1976 low-rise, pre-1976 medium rise, modern low- and mid-rise, modern high-rise, industrial tilt-up buildings, advanced seismic systems and ground-failure induced damaged and retrofitted RC buildings. Preliminary lessons are highlighted and discussed. In general, reinforced concrete buildings behaved well and as expected, given the intensity of this event.

scholarly journals Frequency Domain Analysis for Geometric Nonlinear Seismic Response of Tall Reinforced Concrete Buildings

2019 ◽  
Vol 25 (3) ◽  
pp. 102-116
Author(s):  
Rafaa Mahmood Abbas ◽  
Ruaa A. Abdulhameed
Keyword(s):  
Reinforced Concrete ◽  
Frequency Domain ◽  
Seismic Design ◽  
Earthquake Ground Motion ◽  
Reinforced Concrete Buildings ◽  
Reinforced Concrete Building ◽  
Building Height ◽  
Concrete Buildings ◽  
Building Models ◽  
Concrete Building

This paper aims to study the second-order geometric nonlinearity effects of P-Delta on the dynamic response of tall reinforced concrete buildings due to a wide range of earthquake ground motion forces, including minor earthquake up to moderate and strong earthquakes. The frequency domain dynamic analysis procedure was used for response assessment. Reinforced concrete building models with different heights up to 50 stories were analyzed. The finite element software ETABS (version 16.0.3) was used to analyze reinforced concrete building models. The study reveals that the percentage increase in buildings' sway and drift due to P-Delta effects are nearly constant for specific building height irrespective of the seismic design category assigned to the building. Generally, increase in building lateral displacement and story drift due to P-Delta effects for all seismic design categories is less than 2% for 10 story buildings, whereas this increase for 20 stories or taller buildings is significant with a maximum value around 16% for 50 story building. As for column forces, the study shows that, generally, columns bending moment increases and shear force decreases when P-Delta effects accounted for. In conclusion, the study recommended that the effects of P-Delta need to be addressed for all SDCs allowed by ASCE7-10 and the most important factor to abandonment P-Delta effects is the building height limit.  

Seismic Performance of a Mixed Masonry-Reinforced Concrete Building

2015 ◽  
pp. 293-312 ◽  
Author(s):  
Vincenzo Gattulli ◽  
Francesco Potenza ◽  
Filippo Valvona
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Discrete Models ◽  
Reinforced Concrete Structure ◽  
Reinforced Concrete Building ◽  
Seismic Performance Evaluation ◽  
Current Limit ◽  
Concrete Building ◽  
Nonlinear Static Procedure ◽  
The City

The 6th of April 2009, a quite strong earthquake of magnitude ML =5.8 (Mw=6.3), struck in the city of L'Aquila. The seismic event caused serious injure to several masonry buildings, compromising a large part of the valuable historical and architectural heritage. The present work deals with seismic performance evaluation of an existing mixed masonry-reinforced concrete building in downtown L'Aquila city. A comprehensive discussion on the current limit capacity of the building based on the visual inspections of the occurred seismic damage, the experimental data from a wide campaign of on-site tests on the material properties, the results of numerical simulations from different naturally discrete models of the mixed masonry-reinforced concrete structure are presented. The seismic performance is evaluated through well-recognized N2 nonlinear static procedure. The Frame by Macro-Elements method is used to define an equivalent 3D frame representation of the structure. The obtained numerical results are directly compared with the surveyed damages.

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