N. Matasovic - Academia.edu (original) (raw)
Papers by N. Matasovic
This document has been written to provide information on how to apply principles of geotechnical ... more This document has been written to provide information on how to apply principles of geotechnical earthquake engineering to planning, design, and retrofit of highway facilities. Geotechnical earthquake engineering topics discussed in this document include: deterministic and probabilistic seismic hazard assessment; evaluation of design ground motions; seismic and site response analyses; evaluation of liquefaction potential and seismic settlements; seismic slope stability and deformation analyses; and seismic design of foundations and retaining structures. The document provides detailed information on basic principles and analyses, with reference to where detailed information on these analyses can be obtained. Design examples illustrating the principles and analyses described in this document are provided in Volume II - Design Examples, FHWA-SA-97-077.
Korean Institute Of Information Technology, Nov 1, 2010
Geotechnical Frontiers 2017, 2017
Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fi... more Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fill landfill covers at MSW and other landfill sites have not been extensively investigated. The two main reasons for the dearth of research on this topic are: (i) design engineers realize that modern landfill covers are relatively thin (on the order of 1.5 m, or less), and hence, their influence on the overall landfill response is assumed to be small; and (ii) there are readily available sets of dynamic soil properties of cohesive soils that could be assigned to landfill covers soils based upon the results of index testing. However, not all landfill covers are " thin, " and the readily available sets of dynamic soil properties may not be applicable for low-plasticity compacted and overconsolidated soils such as landfill covers. At many old landfills and Superfund sites, landfill cover thickness readily exceeds 5 m, and covers can be as thick as 10 to 15 m. These thicker covers may have significant influence on the overall response of landfills, and hence, careful evaluation of cover material properties is warranted. In this paper, results of in-situ nonlinear testing of landfill cover soils was used to develop modulus reduction curves. Shear strains in the cover soils ranging from 10-4 % to 2×10-2 % were induced by Vibroseis shakers. The material damping curves were estimated from modulus reduction curves by means of a nonlinear constitutive model, Masing rules, and engineering judgement. The modulus reduction and damping curves presented herein may be used for seismic design of landfill covers and other engineered fills constructed of soils of similar plasticity and with similar stiffness (i.e., shear wave velocity) and compaction characteristics.
This manual was written to provide training on how to apply principles of geotechnical earthquake... more This manual was written to provide training on how to apply principles of geotechnical earthquake engineering to planning, design, and retrofit of highway facilities. Reproduced here are two chapters that deal with (1) ground motion characterization and (2) liquefaction and seismic settlement, respectively. These chapters supersede chapters 4 and 8 in the FHWA Circular on Geotechnical Earthquake Engineering for Highways, Volume 1.
Journal of Geotechnical and Geoenvironmental Engineering, 2021
This paper presents a seismic deformation analysis in which a degrading yield acceleration has be... more This paper presents a seismic deformation analysis in which a degrading yield acceleration has been implemented. The degradation of yield acceleration is modeled with a simple linear degradation model. Using a typical solid waste landfill composite cover configuration and actual interface shear strength testing results, the conservatism associated with seismic deformation analysis performed using the classical Newmark approach and a constant yield acceleration based upon residual and/or large deformation interface shear strength is investigated. The influence on permanent seismic deformation of the normal stress acting on the interface is also examined. Results indicate that Newmark seismic deformation analysis based solely on residual or large strain shear strength parameters is conservative.
The article deals with various approaches to the analysis of seismic stability of flysch slopes i... more The article deals with various approaches to the analysis of seismic stability of flysch slopes in the adriatic coastal region. The existing data are systematized and the calculation models are designed to meet these specific requirements. It presents practical recommendations for the calculation, and analyzes two cases of landslide caused by an earthquake.
A discussion of a paper with the aforementioned title by Matasovic and Vucetic, published in this... more A discussion of a paper with the aforementioned title by Matasovic and Vucetic, published in this journal (Volume 119, Number 11, November 1993), is presented. The discussers note the advantage of using the modified Kondner and Zelasko hyperbolic model (MKZ) proposed by the authors. Discussion also focuses on two additional parameters of the MKZ model. Discussion is followed by closure from the authors.
Although the fact that sediments can amplify earthquake ground motion was recognized at least 100... more Although the fact that sediments can amplify earthquake ground motion was recognized at least 100 years ago (Milne, 1898), there has been a lingering uncertainty as to whether the degree of amplification varies with the level of input motion. This issue remains as one of the most important questions with respect to understanding and predicting earthquake ground motion. In accordance with the conservation of energy, seismicwave amplitudes generally increase in sediments due to lower densities and and/or lower seismic velocities. In addition, resonance effects can occur where abrupt impedance contrasts exist. If sediments were perfectly elastic, their response would be independent of incident-wave amplitudes. As with any real material, however, sediments begin to yield at some level of strain, and this violation of Hooke's law will give rise to a nonlinear response. The engineering community has long believed that sediment nonlinearity is significant. This perspective was based al...
Bulletin of the Seismological Society of America, 2001
Soil Dynamics and …, 2006
In areas of high seismicity, seismic stability often controls hazardous and solid waste landfill ... more In areas of high seismicity, seismic stability often controls hazardous and solid waste landfill closure design. The undrained shear strength (Su) of the waste mass is fundamental to seismic slope stability analyses. The value of Su for hazardous waste fill is often difficult to ...
Geotextiles and Geomembranes
Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fi... more Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fill landfill covers at MSW and other landfill sites have not been extensively investigated. The two main reasons for the dearth of research on this topic are: (i) design engineers realize that modern landfill covers are relatively thin (on the order of 1.5 m, or less), and hence, their influence on the overall landfill response is assumed to be small; and (ii) there are readily available sets of dynamic soil properties of cohesive soils that could be assigned to landfill covers soils based upon the results of index testing. However, not all landfill covers are " thin, " and the readily available sets of dynamic soil properties may not be applicable for low-plasticity compacted and overconsolidated soils such as landfill covers. At many old landfills and Superfund sites, landfill cover thickness readily exceeds 5 m, and covers can be as thick as 10 to 15 m. These thicker covers may have significant influence on the overall response of landfills, and hence, careful evaluation of cover material properties is warranted. In this paper, results of in-situ nonlinear testing of landfill cover soils was used to develop modulus reduction curves. Shear strains in the cover soils ranging from 10-4 % to 2×10-2 % were induced by Vibroseis shakers. The material damping curves were estimated from modulus reduction curves by means of a nonlinear constitutive model, Masing rules, and engineering judgement. The modulus reduction and damping curves presented herein may be used for seismic design of landfill covers and other engineered fills constructed of soils of similar plasticity and with similar stiffness (i.e., shear wave velocity) and compaction characteristics.
This document has been written to provide information on how to apply principles of geotechnical ... more This document has been written to provide information on how to apply principles of geotechnical earthquake engineering to planning, design, and retrofit of highway facilities. Geotechnical earthquake engineering topics discussed in this document include: deterministic and probabilistic seismic hazard assessment; evaluation of design ground motions; seismic and site response analyses; evaluation of liquefaction potential and seismic settlements; seismic slope stability and deformation analyses; and seismic design of foundations and retaining structures. The document provides detailed information on basic principles and analyses, with reference to where detailed information on these analyses can be obtained. Design examples illustrating the principles and analyses described in this document are provided in Volume II - Design Examples, FHWA-SA-97-077.
Korean Institute Of Information Technology, Nov 1, 2010
Geotechnical Frontiers 2017, 2017
Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fi... more Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fill landfill covers at MSW and other landfill sites have not been extensively investigated. The two main reasons for the dearth of research on this topic are: (i) design engineers realize that modern landfill covers are relatively thin (on the order of 1.5 m, or less), and hence, their influence on the overall landfill response is assumed to be small; and (ii) there are readily available sets of dynamic soil properties of cohesive soils that could be assigned to landfill covers soils based upon the results of index testing. However, not all landfill covers are " thin, " and the readily available sets of dynamic soil properties may not be applicable for low-plasticity compacted and overconsolidated soils such as landfill covers. At many old landfills and Superfund sites, landfill cover thickness readily exceeds 5 m, and covers can be as thick as 10 to 15 m. These thicker covers may have significant influence on the overall response of landfills, and hence, careful evaluation of cover material properties is warranted. In this paper, results of in-situ nonlinear testing of landfill cover soils was used to develop modulus reduction curves. Shear strains in the cover soils ranging from 10-4 % to 2×10-2 % were induced by Vibroseis shakers. The material damping curves were estimated from modulus reduction curves by means of a nonlinear constitutive model, Masing rules, and engineering judgement. The modulus reduction and damping curves presented herein may be used for seismic design of landfill covers and other engineered fills constructed of soils of similar plasticity and with similar stiffness (i.e., shear wave velocity) and compaction characteristics.
This manual was written to provide training on how to apply principles of geotechnical earthquake... more This manual was written to provide training on how to apply principles of geotechnical earthquake engineering to planning, design, and retrofit of highway facilities. Reproduced here are two chapters that deal with (1) ground motion characterization and (2) liquefaction and seismic settlement, respectively. These chapters supersede chapters 4 and 8 in the FHWA Circular on Geotechnical Earthquake Engineering for Highways, Volume 1.
Journal of Geotechnical and Geoenvironmental Engineering, 2021
This paper presents a seismic deformation analysis in which a degrading yield acceleration has be... more This paper presents a seismic deformation analysis in which a degrading yield acceleration has been implemented. The degradation of yield acceleration is modeled with a simple linear degradation model. Using a typical solid waste landfill composite cover configuration and actual interface shear strength testing results, the conservatism associated with seismic deformation analysis performed using the classical Newmark approach and a constant yield acceleration based upon residual and/or large deformation interface shear strength is investigated. The influence on permanent seismic deformation of the normal stress acting on the interface is also examined. Results indicate that Newmark seismic deformation analysis based solely on residual or large strain shear strength parameters is conservative.
The article deals with various approaches to the analysis of seismic stability of flysch slopes i... more The article deals with various approaches to the analysis of seismic stability of flysch slopes in the adriatic coastal region. The existing data are systematized and the calculation models are designed to meet these specific requirements. It presents practical recommendations for the calculation, and analyzes two cases of landslide caused by an earthquake.
A discussion of a paper with the aforementioned title by Matasovic and Vucetic, published in this... more A discussion of a paper with the aforementioned title by Matasovic and Vucetic, published in this journal (Volume 119, Number 11, November 1993), is presented. The discussers note the advantage of using the modified Kondner and Zelasko hyperbolic model (MKZ) proposed by the authors. Discussion also focuses on two additional parameters of the MKZ model. Discussion is followed by closure from the authors.
Although the fact that sediments can amplify earthquake ground motion was recognized at least 100... more Although the fact that sediments can amplify earthquake ground motion was recognized at least 100 years ago (Milne, 1898), there has been a lingering uncertainty as to whether the degree of amplification varies with the level of input motion. This issue remains as one of the most important questions with respect to understanding and predicting earthquake ground motion. In accordance with the conservation of energy, seismicwave amplitudes generally increase in sediments due to lower densities and and/or lower seismic velocities. In addition, resonance effects can occur where abrupt impedance contrasts exist. If sediments were perfectly elastic, their response would be independent of incident-wave amplitudes. As with any real material, however, sediments begin to yield at some level of strain, and this violation of Hooke's law will give rise to a nonlinear response. The engineering community has long believed that sediment nonlinearity is significant. This perspective was based al...
Bulletin of the Seismological Society of America, 2001
Soil Dynamics and …, 2006
In areas of high seismicity, seismic stability often controls hazardous and solid waste landfill ... more In areas of high seismicity, seismic stability often controls hazardous and solid waste landfill closure design. The undrained shear strength (Su) of the waste mass is fundamental to seismic slope stability analyses. The value of Su for hazardous waste fill is often difficult to ...
Geotextiles and Geomembranes
Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fi... more Unlike dynamic properties of municipal solid waste (MSW), the dynamic properties of engineered fill landfill covers at MSW and other landfill sites have not been extensively investigated. The two main reasons for the dearth of research on this topic are: (i) design engineers realize that modern landfill covers are relatively thin (on the order of 1.5 m, or less), and hence, their influence on the overall landfill response is assumed to be small; and (ii) there are readily available sets of dynamic soil properties of cohesive soils that could be assigned to landfill covers soils based upon the results of index testing. However, not all landfill covers are " thin, " and the readily available sets of dynamic soil properties may not be applicable for low-plasticity compacted and overconsolidated soils such as landfill covers. At many old landfills and Superfund sites, landfill cover thickness readily exceeds 5 m, and covers can be as thick as 10 to 15 m. These thicker covers may have significant influence on the overall response of landfills, and hence, careful evaluation of cover material properties is warranted. In this paper, results of in-situ nonlinear testing of landfill cover soils was used to develop modulus reduction curves. Shear strains in the cover soils ranging from 10-4 % to 2×10-2 % were induced by Vibroseis shakers. The material damping curves were estimated from modulus reduction curves by means of a nonlinear constitutive model, Masing rules, and engineering judgement. The modulus reduction and damping curves presented herein may be used for seismic design of landfill covers and other engineered fills constructed of soils of similar plasticity and with similar stiffness (i.e., shear wave velocity) and compaction characteristics.