Sedat Sert | Sakarya University (original) (raw)
Papers by Sedat Sert
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
Bulletin of Earthquake Engineering, 2010
Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have bee... more Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have been observed during the 1999 Marmara (Turkey) earthquake. Research to understand the failure phenomena has been carried out since the earthquakes. This paper attempts to provide explanations to the liquefaction failure of silts in seismic conditions. Findings from a large amount of data collected in the city of Adapazari on the physical and mechanical properties of soils is presented. A geomorphological map of the city has shown that there are surprising horizontal and vertical variations of the facies due to the activity of rivers in the past. Cases of liquefaction appear to have concentrated in former backswamp areas where silts and sandy silts were deposited by crevasse splays. Properties of the soils in zones of liquefaction and non-liquefaction have been determined down to a reasonable depth by measuring the average size, clay content and liquidity index as well as cone penetration resistances with porewater pressures to discover that there is significant discrepancy among those profiles susceptible to liquefaction and non-liquefying deposits. A set of “Adapazari Criteria” is proposed which is intended to improve over the “Chinese Criteria” and is simple enough to be universally applicable. This classification is similar to the existing criteria but emphasizes more on the clay content in addition to measuring the liquid limit and the liquidity index as well as the average size.
Bulletin of Earthquake Engineering, 2010
Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have bee... more Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have been observed during the 1999 Marmara (Turkey) earthquake. Research to understand the failure phenomena has been carried out since the earthquakes. This paper attempts to provide explanations to the liquefaction failure of silts in seismic conditions. Findings from a large amount of data collected in the city of Adapazari on the physical and mechanical properties of soils is presented. A geomorphological map of the city has shown that there are surprising horizontal and vertical variations of the facies due to the activity of rivers in the past. Cases of liquefaction appear to have concentrated in former backswamp areas where silts and sandy silts were deposited by crevasse splays. Properties of the soils in zones of liquefaction and non-liquefaction have been determined down to a reasonable depth by measuring the average size, clay content and liquidity index as well as cone penetration resistances with porewater pressures to discover that there is significant discrepancy among those profiles susceptible to liquefaction and non-liquefying deposits. A set of “Adapazari Criteria” is proposed which is intended to improve over the “Chinese Criteria” and is simple enough to be universally applicable. This classification is similar to the existing criteria but emphasizes more on the clay content in addition to measuring the liquid limit and the liquidity index as well as the average size.
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adap... more The destruction and widespread damage to the buildings were blamed on poor alluvial soils in Adapazarı following the 1999 earthquakes. This allegedly led the city planners to propose buildings to be constructed in "safe" locations and limit building heights to two storeys in the city center. Studies since the earthquakes however have shown that inadequate foundation and structural design rather than "poor" soils were the primary cause of damage. Dense layers of sand or stiff clays are encountered below a depth of 5 to 15 m, which means that if the soft top layers of soil are avoided, successful foundation systems can be designed for higher structures, provided that adequate structural system is selected. In this study, it has been demonstrated by numerical analysis that it can be possible to reduce excessive displacements of a building on liquefiable silty soils caused by the earthquake by constructing them on a piled raft.
Bulletin of Earthquake Engineering, 2010
Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have bee... more Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have been observed during the 1999 Marmara (Turkey) earthquake. Research to understand the failure phenomena has been carried out since the earthquakes. This paper attempts to provide explanations to the liquefaction failure of silts in seismic conditions. Findings from a large amount of data collected in the city of Adapazari on the physical and mechanical properties of soils is presented. A geomorphological map of the city has shown that there are surprising horizontal and vertical variations of the facies due to the activity of rivers in the past. Cases of liquefaction appear to have concentrated in former backswamp areas where silts and sandy silts were deposited by crevasse splays. Properties of the soils in zones of liquefaction and non-liquefaction have been determined down to a reasonable depth by measuring the average size, clay content and liquidity index as well as cone penetration resistances with porewater pressures to discover that there is significant discrepancy among those profiles susceptible to liquefaction and non-liquefying deposits. A set of “Adapazari Criteria” is proposed which is intended to improve over the “Chinese Criteria” and is simple enough to be universally applicable. This classification is similar to the existing criteria but emphasizes more on the clay content in addition to measuring the liquid limit and the liquidity index as well as the average size.
Bulletin of Earthquake Engineering, 2010
Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have bee... more Ground failures in the form of liquefaction, loss of bearing capacity and soil softening have been observed during the 1999 Marmara (Turkey) earthquake. Research to understand the failure phenomena has been carried out since the earthquakes. This paper attempts to provide explanations to the liquefaction failure of silts in seismic conditions. Findings from a large amount of data collected in the city of Adapazari on the physical and mechanical properties of soils is presented. A geomorphological map of the city has shown that there are surprising horizontal and vertical variations of the facies due to the activity of rivers in the past. Cases of liquefaction appear to have concentrated in former backswamp areas where silts and sandy silts were deposited by crevasse splays. Properties of the soils in zones of liquefaction and non-liquefaction have been determined down to a reasonable depth by measuring the average size, clay content and liquidity index as well as cone penetration resistances with porewater pressures to discover that there is significant discrepancy among those profiles susceptible to liquefaction and non-liquefying deposits. A set of “Adapazari Criteria” is proposed which is intended to improve over the “Chinese Criteria” and is simple enough to be universally applicable. This classification is similar to the existing criteria but emphasizes more on the clay content in addition to measuring the liquid limit and the liquidity index as well as the average size.