The August 17, 1999, Kocaeli (Turkey) earthquake  damage to structures

Saatçioğlu, Murat; Mitchell, Denis; Tinawi, René; Gardner, N. J.; Gillies, A. G.; Ghobarah, A.; Anderson, Donald L.; Lau, David T.

doi:10.1139/l01-043

Cited by 46 publications

(41 citation statements)

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“…Interestingly, it is documented that some of the asmolen buildings failed due to the weak vertical elements as compared to horizontal members (Aschheim et al 2000;Saatcioglu et al 2001). Reports also include the common deficiencies of RC buildings including the asmolen buildings.…”

Section: Reported Performance Of Asmolen Buildings In Earthquakes In mentioning

confidence: 99%

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Dönmez

2015

J. Perform. Constr. Facil.

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Observations after the 2011 Van-Erciş earthquake show that some of the recently constructed reinforced-concrete buildings were either heavily damaged or had collapsed. As a building subtype, wide-beam, infill-joist block reinforced-concrete frames got attention because of their mode of failure. There were several such buildings that failed in strong-column, weak-beam mode. Considering the demand created by the earthquake, structures were not expected to reach their full capacity. The purpose of this study is to review the history and current practice of infill-joist frames in Turkey and to conduct a performance evaluation of infill-joist frames designed per the current earthquake code (2007). Regulations for this building subtype are critically reviewed, and the designer's response to code regulations is discussed. Results indicate that the force-based design approach used in the current code is not always adequate to satisfy the displacement demands. In addition, it is observed that layout, proportioning, and detailing requirements of beam-end regions and beam-column connections do not always warrant ductile behavior as targeted.

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Section: Reported Performance Of Asmolen Buildings In Earthquakes In mentioning

confidence: 99%

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Dönmez

2015

J. Perform. Constr. Facil.

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“…Post-earthquake observations revealed that beamcolumn connections are widely influence the overall seismic response of precast concrete structures (Saatcioglu et al 2001;Ozden and Meydanli 2003;Senel and Palanci 2013). It is still a challenging subject to develop precast concrete beam-column connections emulating the seismic performance of monolithic systems to maintain advantages of precast construction process for multi-story buildings.…”

Section: Introductionmentioning

confidence: 99%

Experimental Cyclic Behavior of Precast Hybrid Beam-Column Connections with Welded Components

Girgin

Mısır

Kahraman

2017

Int J Concr Struct Mater

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Post-earthquake observations revealed that seismic performance of beam-column connections in precast concrete structures affect the overall response extensively. Seismic design of precast reinforced concrete structures requires improved beamcolumn connections to transfer reversed load effects between structural elements. In Turkey, hybrid beam-column connections with welded components have been applied extensively in precast concrete industry for decades. Beam bottom longitudinal rebars are welded to beam end plates while top longitudinal rebars are placed to designated gaps in joint panels before casting of topping concrete in this type of connections. The paper presents the major findings of an experimental test programme including one monolithic and five precast hybrid half scale specimens representing interior beam-column connections of a moment frame of high ductility level. The required welding area between beam bottom longitudinal rebars and beam-end plates were calculated based on welding coefficients considered as a test parameter. It is observed that the maximum strain developed in the beam bottom flexural reinforcement plays an important role in the overall behavior of the connections. Two additional specimens which include unbonded lengths on the longitudinal rebars to reduce that strain demands were also tested. Strength, stiffness and energy dissipation characteristics of test specimens were investigated with respect to test variables. Seismic performances of test specimens were evaluated by obtaining damage indices.

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“…After August 1999 Kocaeli and November 1999 Düzce Earthquakes, site investigations revealed that structural damage and collapse of one-story precast structures were common Saatcioglu et al (2001), Ataköy (1999), Sezen et al (2000), Bruneau (2002), Sezen and Whittaker (2006). Various types of structural damage were frequently observed in one-story precast structures, such as flexural hinges at the base of the columns, axial movement of the roof girders that led to pounding against the supporting columns or falling of the roof girders, Fig.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of one-story precast structures for near-fault and far-fault strong ground motions

Yüksel

Sürmeli

2009

Bull Earthquake Eng

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Failure of one-story precast structures consisting of cantilever columns connected by simply supported beams was widely reported throughout the epicentral regions of the last devastating earthquakes in Turkey. As a single degree of freedom system, precast columns are designed by using the elastic spectrum given in the seismic code and by considering a seismic load reduction factor which takes into account the inelastic behavior of the columns under seismic loads. Although the existing seismic codes consider near-fault shaking effects in the development of elastic response spectra, they do not currently consider the increased inelastic demands that may occur during near-fault ground motion. The current study consists of nonlinear time history analyses of various hypothetical columns having geometric and mass properties which are being used in Turkish precast industry and the evaluation of damage indexes (DI) in terms of peak ground velocity (PGV) and peak ground acceleration (PGA) of the used strong ground motions. It is achieved that near-fault earthquakes create more damages on the columns. This might be one of the main reasons for the collapse of several one-storey precast buildings which were well designed according to the seismic codes in the district of existing faults. The obtained PGV versus DI charts prove that if one increase the sectional dimensions and/or longitudinal reinforcement ratio of the column, the possible damage from near-fault shaking effects could be reduced. 123 938 Bull Earthquake Eng (2010) 8:937-953 Fig.

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The August 17, 1999, Kocaeli (Turkey) earthquake damage to structures

Cited by 46 publications

References 0 publications

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Experimental Cyclic Behavior of Precast Hybrid Beam-Column Connections with Welded Components

Failure analysis of one-story precast structures for near-fault and far-fault strong ground motions

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The August 17, 1999, Kocaeli (Turkey) earthquake  damage to structures

Cited by 46 publications

References 0 publications

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Seismic Performance of Wide-Beam Infill-Joist Block RC Frames in Turkey

Experimental Cyclic Behavior of Precast Hybrid Beam-Column Connections with Welded Components

Failure analysis of one-story precast structures for near-fault and far-fault strong ground motions

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Product

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The August 17, 1999, Kocaeli (Turkey) earthquake damage to structures