Sreevalsa Kolathayar | National Institute of Technology Karnataka,Surathkal (original) (raw)
Papers by Sreevalsa Kolathayar
Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016), 2016
Bookmarks Related papers MentionsView impact
International Journal of Geotechnical Earthquake Engineering, 2015
This paper presents the seismic hazard of the state of Uttarakhand in India, located at the footh... more This paper presents the seismic hazard of the state of Uttarakhand in India, located at the foothills of the seismically active Himalayan mountain ranges. In the present study, an updated catalog of earthquakes has been prepared for Uttarakhand which was homogenized into a unified moment magnitude scale after declustering of the catalog to remove aftershocks and foreshocks. Various source zones were identified in the study area to account for local variability in seismicity characteristics. The seismicity parameters were estimated for each of these source zones, which are necessary inputs into seismic hazard estimation of a region. The seismic hazard evaluation of the region based on a state-of-the art PSHA study was performed using the classical Cornell–McGuire approach with different source models and attenuation relations. The most recent knowledge of seismic activity in the region was used to evaluate the hazard, incorporating uncertainty associated with different modeling param...
Bookmarks Related papers MentionsView impact
Innovative Infrastructure Solutions
Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.
Bookmarks Related papers MentionsView impact
Geotechnical, geological and earthquake engineering, 2022
Bookmarks Related papers MentionsView impact
Innovative Infrastructure Solutions
Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Geotechnical Characteristics of Soils and Rocks of India, 2021
Bookmarks Related papers MentionsView impact
Lecture Notes in Civil Engineering, 2021
Bookmarks Related papers MentionsView impact
Energy consumption takes place at each stage of pavement construction, right from extraction of r... more Energy consumption takes place at each stage of pavement construction, right from extraction of raw materials to finished products like roads. Carbon emission is an undesirable product that materializes simultaneously with energy consumption that is indispensable right through the construction activities. Reusability is another important feature that we should consider when we speak about sustainability. Though pavements made of bitumen have a higher embodied energy, it readily yields to recycling, when compared to concrete pavements, thereby reducing the energy consumed. Reducing consumed energy helps to save the resource for the future. Many situations warrant compromised sustainability when a particular type of pavement is preferred to serve a special function. In such cases, alternative materials with low embodied energy and low carbon emission may be used for the pavement design. Designs using waste materials and recycled materials would help to make energy-efficient pavements ...
Bookmarks Related papers MentionsView impact
Resilient Infrastructure, 2021
Bookmarks Related papers MentionsView impact
International Journal of Ocean and Coastal Engineering, 2019
In general, people like to live near the coast because of a better aesthetical pleasing living en... more In general, people like to live near the coast because of a better aesthetical pleasing living environment, access to a variety of recreational activities and more job opportunities. Consequently, more than 50% of the world’s population live within 200[Formula: see text]km of the coast, and ¾ of the world’s megacities are situated by the shore. Significant pressure on land, water supply, waste management and other infrastructures appear in these coastal cities. India, which hosts one-sixth of the world’s population is looking for strategies to manage India’s coastal cities, water, land and human resources. This paper reviews China’s experience in water resources development for coastal cities. China’s coastal economic corridor (CEC) contributes 60% of the national GDP, which needs plentiful water supply to sustain its coastal cities. The present investigation shows that India has better natural conditions to develop its CEC. Among the coastal infrastructures, coastal reservoirs (i.e...
Bookmarks Related papers MentionsView impact
International Journal of Geotechnical Earthquake Engineering, 2018
This article describes how the design of shallow foundation needs complete knowledge about bearin... more This article describes how the design of shallow foundation needs complete knowledge about bearing capacity. During earthquakes additional lateral force acts at the foundation bed which reduces the bearing capacity. Most of the literature present either the pseudo static analysis or assume a planar failure surface to estimate seismic bearing capacity factors. Here, a pseudo dynamic approach that considers the time dependent effect of earthquake loading is employed. A composite failure surface has been considered for a more realistic estimation of seismic bearing capacity. New expressions were formulated to arrive at the seismic bearing capacity factor, considering the forces acting on the failure wedge based on the limit equilibrium approach. The effect of soil friction angles and the seismic peak of horizontal ground accelerations on the seismic bearing capacity were studied using the proposed method. It was observed that present pseudo-dynamic analysis with a composite failure mec...
Bookmarks Related papers MentionsView impact
Comprehensive Seismic Zonation Schemes for Regions at Different Scales, 2018
This chapter describes different methodologies available for site characterization. The details o... more This chapter describes different methodologies available for site characterization. The details of different low strain and high strain tests are also listed in this chapter. It also provides procedures for the evaluation of dynamic properties from the laboratory as well as in-situ tests. Further, this chapter also presents site characterization studies carried out at micro as well as macro-level.
Bookmarks Related papers MentionsView impact
Lecture Notes in Civil Engineering, 2021
Bookmarks Related papers MentionsView impact
Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic source...
Bookmarks Related papers MentionsView impact
Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 2018
Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic sources. DSHA was then performed by dividing the study area into grids of size 0.02o × 0.02o (approximately 2 km × 2 km) using a MATLAB code, considering three different attenuation relationships for the stable continental region. Land use (LU) map for the region was developed from LANDSAT 8 data using various GIS platforms. Hazard contour map prepared using ArcGIS, was then overlaid on the LU map to comprehend the seismic risk of the region. It was observed that, though the wards south-west of the city shows higher Peak Ground Acceleration (PGA) values, the wards north-east of the city have larger and denser built-up areas, increasing its vulnerability, in the event of an earthquake.
Bookmarks Related papers MentionsView impact
Water Supply, 2018
This paper revisits the water resource scenario in India and presents the adequacy of the coastal... more This paper revisits the water resource scenario in India and presents the adequacy of the coastal reservoir concept to address water scarcity by impounding excess river flood waters. Although there has been no significant change in India's rainfall pattern in the last 100 years, there is a spatial non-uniformity in the rainfall events that occur which makes it difficult to pre-plan large-scale water storage at different locations. This study highlights the fact that there is enough water available but the deficiency is in storage. A large portion of freshwater from river systems, groundwater and wetlands drains into the sea due to insufficient storage facilities. Coastal reservoirs enable the storage of excess river flood waters near the coast for future use. This paper discusses current water supply solutions available in the country, and the efficacy of coastal reservoirs along with feasibility implications. The associated rewards and challenges are also discussed. The paper p...
Bookmarks Related papers MentionsView impact
Earthquake Hazard Assessment, 2018
Bookmarks Related papers MentionsView impact
Seismological Research Letters, 2012
... We created separate catalogs for each zone, and based on the threshold magnitude, estimated t... more ... We created separate catalogs for each zone, and based on the threshold magnitude, estimated the ... rate studies (Wiemer and Wyss 1997, 1997) as well as hazard-related studies (Frankel ... Another crucial development in this method is that the space-time distance is based on ...
Bookmarks Related papers MentionsView impact
Natural Hazards, 2013
Bookmarks Related papers MentionsView impact
Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016), 2016
Bookmarks Related papers MentionsView impact
International Journal of Geotechnical Earthquake Engineering, 2015
This paper presents the seismic hazard of the state of Uttarakhand in India, located at the footh... more This paper presents the seismic hazard of the state of Uttarakhand in India, located at the foothills of the seismically active Himalayan mountain ranges. In the present study, an updated catalog of earthquakes has been prepared for Uttarakhand which was homogenized into a unified moment magnitude scale after declustering of the catalog to remove aftershocks and foreshocks. Various source zones were identified in the study area to account for local variability in seismicity characteristics. The seismicity parameters were estimated for each of these source zones, which are necessary inputs into seismic hazard estimation of a region. The seismic hazard evaluation of the region based on a state-of-the art PSHA study was performed using the classical Cornell–McGuire approach with different source models and attenuation relations. The most recent knowledge of seismic activity in the region was used to evaluate the hazard, incorporating uncertainty associated with different modeling param...
Bookmarks Related papers MentionsView impact
Innovative Infrastructure Solutions
Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.
Bookmarks Related papers MentionsView impact
Geotechnical, geological and earthquake engineering, 2022
Bookmarks Related papers MentionsView impact
Innovative Infrastructure Solutions
Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Geotechnical Characteristics of Soils and Rocks of India, 2021
Bookmarks Related papers MentionsView impact
Lecture Notes in Civil Engineering, 2021
Bookmarks Related papers MentionsView impact
Energy consumption takes place at each stage of pavement construction, right from extraction of r... more Energy consumption takes place at each stage of pavement construction, right from extraction of raw materials to finished products like roads. Carbon emission is an undesirable product that materializes simultaneously with energy consumption that is indispensable right through the construction activities. Reusability is another important feature that we should consider when we speak about sustainability. Though pavements made of bitumen have a higher embodied energy, it readily yields to recycling, when compared to concrete pavements, thereby reducing the energy consumed. Reducing consumed energy helps to save the resource for the future. Many situations warrant compromised sustainability when a particular type of pavement is preferred to serve a special function. In such cases, alternative materials with low embodied energy and low carbon emission may be used for the pavement design. Designs using waste materials and recycled materials would help to make energy-efficient pavements ...
Bookmarks Related papers MentionsView impact
Resilient Infrastructure, 2021
Bookmarks Related papers MentionsView impact
International Journal of Ocean and Coastal Engineering, 2019
In general, people like to live near the coast because of a better aesthetical pleasing living en... more In general, people like to live near the coast because of a better aesthetical pleasing living environment, access to a variety of recreational activities and more job opportunities. Consequently, more than 50% of the world’s population live within 200[Formula: see text]km of the coast, and ¾ of the world’s megacities are situated by the shore. Significant pressure on land, water supply, waste management and other infrastructures appear in these coastal cities. India, which hosts one-sixth of the world’s population is looking for strategies to manage India’s coastal cities, water, land and human resources. This paper reviews China’s experience in water resources development for coastal cities. China’s coastal economic corridor (CEC) contributes 60% of the national GDP, which needs plentiful water supply to sustain its coastal cities. The present investigation shows that India has better natural conditions to develop its CEC. Among the coastal infrastructures, coastal reservoirs (i.e...
Bookmarks Related papers MentionsView impact
International Journal of Geotechnical Earthquake Engineering, 2018
This article describes how the design of shallow foundation needs complete knowledge about bearin... more This article describes how the design of shallow foundation needs complete knowledge about bearing capacity. During earthquakes additional lateral force acts at the foundation bed which reduces the bearing capacity. Most of the literature present either the pseudo static analysis or assume a planar failure surface to estimate seismic bearing capacity factors. Here, a pseudo dynamic approach that considers the time dependent effect of earthquake loading is employed. A composite failure surface has been considered for a more realistic estimation of seismic bearing capacity. New expressions were formulated to arrive at the seismic bearing capacity factor, considering the forces acting on the failure wedge based on the limit equilibrium approach. The effect of soil friction angles and the seismic peak of horizontal ground accelerations on the seismic bearing capacity were studied using the proposed method. It was observed that present pseudo-dynamic analysis with a composite failure mec...
Bookmarks Related papers MentionsView impact
Comprehensive Seismic Zonation Schemes for Regions at Different Scales, 2018
This chapter describes different methodologies available for site characterization. The details o... more This chapter describes different methodologies available for site characterization. The details of different low strain and high strain tests are also listed in this chapter. It also provides procedures for the evaluation of dynamic properties from the laboratory as well as in-situ tests. Further, this chapter also presents site characterization studies carried out at micro as well as macro-level.
Bookmarks Related papers MentionsView impact
Lecture Notes in Civil Engineering, 2021
Bookmarks Related papers MentionsView impact
Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic source...
Bookmarks Related papers MentionsView impact
Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 2018
Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic sources. DSHA was then performed by dividing the study area into grids of size 0.02o × 0.02o (approximately 2 km × 2 km) using a MATLAB code, considering three different attenuation relationships for the stable continental region. Land use (LU) map for the region was developed from LANDSAT 8 data using various GIS platforms. Hazard contour map prepared using ArcGIS, was then overlaid on the LU map to comprehend the seismic risk of the region. It was observed that, though the wards south-west of the city shows higher Peak Ground Acceleration (PGA) values, the wards north-east of the city have larger and denser built-up areas, increasing its vulnerability, in the event of an earthquake.
Bookmarks Related papers MentionsView impact
Water Supply, 2018
This paper revisits the water resource scenario in India and presents the adequacy of the coastal... more This paper revisits the water resource scenario in India and presents the adequacy of the coastal reservoir concept to address water scarcity by impounding excess river flood waters. Although there has been no significant change in India's rainfall pattern in the last 100 years, there is a spatial non-uniformity in the rainfall events that occur which makes it difficult to pre-plan large-scale water storage at different locations. This study highlights the fact that there is enough water available but the deficiency is in storage. A large portion of freshwater from river systems, groundwater and wetlands drains into the sea due to insufficient storage facilities. Coastal reservoirs enable the storage of excess river flood waters near the coast for future use. This paper discusses current water supply solutions available in the country, and the efficacy of coastal reservoirs along with feasibility implications. The associated rewards and challenges are also discussed. The paper p...
Bookmarks Related papers MentionsView impact
Earthquake Hazard Assessment, 2018
Bookmarks Related papers MentionsView impact
Seismological Research Letters, 2012
... We created separate catalogs for each zone, and based on the threshold magnitude, estimated t... more ... We created separate catalogs for each zone, and based on the threshold magnitude, estimated the ... rate studies (Wiemer and Wyss 1997, 1997) as well as hazard-related studies (Frankel ... Another crucial development in this method is that the space-time distance is based on ...
Bookmarks Related papers MentionsView impact
Natural Hazards, 2013
Bookmarks Related papers MentionsView impact