Performance of Reinforced Concrete Buildings during the 2002 Molise, Italy, Earthquake

2004 ◽  
Vol 20 (1_suppl) ◽  
pp. 221-255 ◽  
Author(s):  
Luis D. Decanini ◽  
Adriano De Sortis ◽  
Agostino Goretti ◽  
Laura Liberatore ◽  
Fabrizio Mollaioli ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Shear Walls ◽  
Structural Elements ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Moment Resisting ◽  
Infill Masonry ◽  
Rc Slabs ◽  
Almost All ◽  
Clay Tiles

About 10% of the almost 20,000 buildings damaged by the 2002 Molise, Italy, seismic sequence were reinforced concrete (RC). The most frequent type of damage affected the infill masonry walls, but in some cases cracks in concrete columns were observed. Heavy damage to both infills and structural elements was restricted to a few cases in the meizoseismal area. Almost all the affected municipalities were only classified as seismic in May 2003, following this earthquake. Consequently, construction generally used vertical-load-bearing moment-resisting frames with no explicit design for seismic lateral forces. In particular, the reinforced concrete buildings typically consist of cast-in-place unidirectional RC slabs lightened with hollow clay tiles, supported by RC beams and columns. Usually no shear walls are present, except in some cases for the elevator shaft. This paper covers: a) an overview and statistical analysis of damage to RC buildings, and b) a detailed analysis of two damaged buildings.

Performance of reinforced concrete buildings during the 27 February 2010 Maule (Chile) earthquake

2013 ◽  
Vol 40 (8) ◽  
pp. 693-710 ◽  
Author(s):  
Murat Saatcioglu ◽  
Dan Palermo ◽  
Ahmed Ghobarah ◽  
Denis Mitchell ◽  
Rob Simpson ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Structural Damage ◽  
Vertical Wall ◽  
Shear Walls ◽  
Poor Performance ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Concrete Frame ◽  
Maule Earthquake ◽  
Observed Damage

The paper presents observed damage in reinforced concrete buildings during the 27 February 2010 Maule earthquake in Chile. Performance of concrete frame and shear wall buildings are discussed with emphasis on seismic deficiencies in design and construction practices. It is shown that the majority of structural damage in multistorey and high-rise buildings can be attributed to poor performance of slender shear walls, without confined boundary elements, suffering from crushing of concrete and buckling of vertical wall reinforcement. Use of irregular buildings, lack of seismic detailing, and the interference of nonstructural elements were commonly observed seismic deficiencies. A comparison is made between Chilean and Canadian design practices with references made to the applicable code clauses. Lessons are drawn from the observed structural performance.

Damage and Implications for Seismic Design of RC Structural Wall Buildings

2012 ◽  
Vol 28 (1_suppl1) ◽  
pp. 281-299 ◽  
Author(s):  
John W. Wallace ◽  
Leonardo M. Massone ◽  
Patricio Bonelli ◽  
Jeff Dragovich ◽  
René Lagos ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Design ◽  
Shear Walls ◽  
The United States ◽  
Reinforced Concrete Buildings ◽  
Structural Wall ◽  
Concrete Buildings ◽  
Number Of Factors ◽  
Detailed Assessment ◽  
Observed Damage

In 1996, Chile adopted NCh433.Of96, which includes seismic design approaches similar to those used in ASCE 7-10 (2010) and a concrete code based on ACI 318-95 (1995) . Since reinforced concrete buildings are the predominant form of construction in Chile for buildings over four stories, the 27 February 2010 earthquake provides an excellent opportunity to assess the performance of reinforced concrete buildings designed using modern codes similar to those used in the United States. A description of observed damage is provided and correlated with a number of factors, including relatively high levels of wall axial load, the lack of well-detailed wall boundaries, and the common usage of flanged walls. Based on a detailed assessment of these issues, potential updates to U.S. codes and recommendations are suggested related to design and detailing of special reinforced concrete shear walls.

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