Date

2006-04-01

Author

Bray, JD
Sancio, RB
Travasarou, T
Durgunoglu, T
Onalp, A
Youd, TL
Stewart, JP
Seed, RB
Çetin, Kemal Önder
Bol, E
Baturay, MB
Christensen, C
Karadayilar, T

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Valuable cases were presented regarding seismic performance of the shallow mat foundations of building structures in Adapazari, Turkey, during the 17 August 1999 Kocaeli İzmit earthquake. The authors attributed the occurrence of displacements of various forms and levels of the mats essentially to the liquefaction or cyclic softening of the saturated fine surface soils of ML/CL type, which dominated those sites. Subsequently, through contrasting the presumed field liquefaction to the analysis results, they evaluated the predictive capability of field-penetration-testing-based liquefaction triggering procedures. It was concluded that in Adapazari, the soils, though they contained significant amounts of clay-size particles and had grain-size distributions within ranges that were believed not to be susceptible to liquefaction, yet liquefied. Among others, the major drawback of the paper under discussion appears to be a priori reasoning of soil liquefaction to explain the observed displacements without a preliminary consideration of whether the bearing capacity failure of the foundations were likely in the cases presented when the seismic demand on building-foundation systems was taken into account. We question this issue, as well as the likelihood of liquefaction of the fine surface deposits encountered in Adapazari during 1999 Kocaeli earthquake.

Subject Keywords

Liquefaction

URI

https://hdl.handle.net/11511/49273

Collections

Department of Civil Engineering, Article