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Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2013
Publisher: Springer Nature Singapore
Date: 23-08-2022
Publisher: American Society of Civil Engineers
Date: 08-08-2016
Publisher: Springer Singapore
Date: 2021
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer Science and Business Media LLC
Date: 17-08-2011
Publisher: Springer Science and Business Media LLC
Date: 15-10-2020
Publisher: Springer Science and Business Media LLC
Date: 07-06-2018
Publisher: Springer Science and Business Media LLC
Date: 18-03-2021
Publisher: Springer Science and Business Media LLC
Date: 11-2008
Publisher: ASTM International
Date: 2010
DOI: 10.1520/GTJ102278
Publisher: Springer Science and Business Media LLC
Date: 22-06-2017
Publisher: American Society of Civil Engineers
Date: 29-03-2012
Publisher: Elsevier BV
Date: 04-2019
Publisher: Springer Science and Business Media LLC
Date: 20-11-2011
Publisher: Informa UK Limited
Date: 24-11-2015
Publisher: Oxford University Press (OUP)
Date: 20-04-2016
Publisher: Springer Science and Business Media LLC
Date: 11-04-2008
Publisher: Elsevier BV
Date: 05-2012
Publisher: Springer Science and Business Media LLC
Date: 20-05-2013
Publisher: Springer Nature Singapore
Date: 2023
Publisher: Springer Science and Business Media LLC
Date: 18-01-2017
Publisher: Elsevier BV
Date: 10-2013
Publisher: American Society of Civil Engineers
Date: 16-05-2011
DOI: 10.1061/47626(405)8
Publisher: The Japanese Geotechnical Society
Date: 2016
DOI: 10.3208/JGSSP.IND-19
Publisher: Springer Science and Business Media LLC
Date: 31-05-2021
Publisher: Environmental and Engineering Geophysical Society
Date: 06-2008
DOI: 10.2113/JEEG13.2.69
Abstract: Mapping the shear wave velocity profile is an important part in seismic hazard and microzonation studies. The shear wave velocity of soil in the city of Bangalore was mapped using the Multichannel Analysis of Surface Wave (MASW) technique. An empirical relationship was found between the Standard Penetration Test (SPT) corrected N value [Formula: see text] and measured shear wave velocity [Formula: see text]. The survey points were selected in such a way that the results represent the entire Bangalore region, covering an area of [Formula: see text]. Fifty-eight 1-D and 20 2-D MASW surveys were performed and their velocity profiles determined. The average shear wave velocity of Bangalore soils was evaluated for depths of [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]. The sub-soil classification was made for seismic local site effect evaluation based on average shear wave velocity of [Formula: see text] depth [Formula: see text] of sites using the National Earthquake Hazards Reduction Program (NEHRP) and International Building Code (IBC) classification. Mapping clearly indicates that the depth of soil obtained from MASW closely matches with the soil layers identified in SPT bore holes. Estimation of local site effects for an earthquake requires knowledge of the dynamic properties of soil, which is usually expressed in terms of shear wave velocity. Hence, to make use of abundant SPT data available on many geotechnical projects in Bangalore, an attempt was made to develop a relationship between Vs (m∕s) and [Formula: see text]. The measured shear wave velocity at 38 locations close to SPT boreholes was used to generate the correlation between the corrected N values and shear wave velocity. A power fit model correlation was developed with a regression coefficient [Formula: see text] of 0.84. This relationship between shear wave velocity and corrected SPT N values correlates well with the Japan Road Association equations.
Publisher: Springer Science and Business Media LLC
Date: 07-07-2023
Publisher: Elsevier BV
Date: 08-2011
Publisher: Copernicus GmbH
Date: 12-04-2019
Publisher: Copernicus GmbH
Date: 12-04-2019
Publisher: American Society of Civil Engineers
Date: 13-11-2012
Publisher: SAGE Publications
Date: 11-01-2016
Abstract: Seismic design of landfills requires an understanding of the dynamic properties of municipal solid waste (MSW) and the dynamic site response of landfill waste during seismic events. The dynamic response of the Mavallipura landfill situated in Bangalore, India, is investigated using field measurements, laboratory studies and recorded ground motions from the intraplate region. The dynamic shear modulus values for the MSW were established on the basis of field measurements of shear wave velocities. Cyclic triaxial testing was performed on reconstituted MSW s les and the shear modulus reduction and d ing characteristics of MSW were studied. Ten ground motions were selected based on regional seismicity and site response parameters have been obtained considering one-dimensional non-linear analysis in the DEEPSOIL program. The surface spectral response varied from 0.6 to 2 g and persisted only for a period of 1 s for most of the ground motions. The maximum peak ground acceleration (PGA) obtained was 0.5 g and the minimum and maximum lifications are 1.35 and 4.05. Amplification of the base acceleration was observed at the top surface of the landfill underlined by a composite soil layer and bedrock for all ground motions. Dynamic seismic properties with lification and site response parameters for MSW landfill in Bangalore, India, are presented in this paper. This study shows that MSW has less shear stiffness and more lification due to loose filling and d ing, which need to be accounted for seismic design of MSW landfills in India.
Publisher: Copernicus GmbH
Date: 16-06-2009
Abstract: Abstract. In this work an attempt has been made to evaluate the seismic hazard of South India (8.0° N–20° N 72° E–88° E) based on the probabilistic seismic hazard analysis (PSHA). The earthquake data obtained from different sources were declustered to remove the dependent events. A total of 598 earthquakes of moment magnitude 4 and above were obtained from the study area after declustering, and were considered for further hazard analysis. The seismotectonic map of the study area was prepared by considering the faults, lineaments and the shear zones in the study area which are associated with earthquakes of magnitude 4 and above. For assessing the seismic hazard, the study area was ided into small grids of size 0.1°×0.1°, and the hazard parameters were calculated at the centre of each of these grid cells by considering all the seismic sources with in a radius of 300 km. Rock level peak horizontal acceleration (PHA) and spectral acceleration (SA) values at 1 s corresponding to 10% and 2% probability of exceedance in 50 years have been calculated for all the grid points. The contour maps showing the spatial variation of these values are presented here. Uniform hazard response spectrum (UHRS) at rock level for 5% d ing and 10% and 2% probability of exceedance in 50 years were also developed for all the grid points. The peak ground acceleration (PGA) at surface level was calculated for the entire South India for four different site classes. These values can be used to find the PGA values at any site in South India based on site class at that location. Thus, this method can be viewed as a simplified method to evaluate the PGA values at any site in the study area.
Publisher: Wiley
Date: 04-10-2018
Publisher: Springer Science and Business Media LLC
Date: 17-03-2015
Publisher: Springer Science and Business Media LLC
Date: 27-08-2009
Publisher: IGI Global
Date: 2015
Abstract: The primary objective of the study is to estimate the energy absorption (EA) capacity, brittleness index (ductility) and stiffness characteristics of Sand-Tire Crumb Mixtures (STCM) using direct shear test and Unconsolidated Undrained (UU) triaxial test for the effective reuse of waste tire crumbs as isolation materials. The properties considered include, strength and deformation characteristics of a STCM. A relatively uniform sand and readily available tire crumb grouped into four size has been selected to generate STCM. Experimental studies have been carried out on STCM with constant density of 1.54 g/cc. Stress-strain curve obtained from UU test has been used to estimate EA. The experimental results show that peak strength, EA and stiffness increases with increasing percentage of tire crumbs up to 25% and starts decreasing thereafter. Among the tested tire crumb sizes, crumb size IV provide the maximum EA without compromising on strength compared to other tire crumb sizes.
Publisher: Springer Science and Business Media LLC
Date: 07-2008
Publisher: Elsevier BV
Date: 06-2009
Publisher: IGI Global
Date: 2012
Abstract: This paper presents seismic site classification practices for urban centres in Australia, China, and India with special emphasis on their suitability for shallow soil sites. The geotechnical aspects of seismic site classifications play a critical role in the development of site response spectra, which is the basis for the seismic design of new structures and seismic assessment of existing structures. Seismic site classifications have used weighted average shear wave velocity of top 30 m soil layers, following the recommendations of National Earthquake Hazards Reduction Program (NEHRP) or International Building Code (IBC) site classification system. The site classification system is based on the studies carried out in the United States where soil layer may extend up to several hundred meters before reaching any distinct soil-bedrock interface. Most of the urban centers in Australia, China, and India are located on distinct bedrocks within few meter depth of soil deposits. For such shallow depth soil sites, NEHRP or IBC site classification system is not suitable. A new site classification based on average soil thickness, shear wave velocity up to engineering bedrock is proposed. The study shows that spectral value and lification ratio estimated from site response study considering top 30 m soil layers are different from those determined considering soil thickness up to engineering bedrock.
Publisher: Springer Science and Business Media LLC
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 20-05-2019
Publisher: Springer Science and Business Media LLC
Date: 03-11-2010
Publisher: Springer Science and Business Media LLC
Date: 13-07-2012
Publisher: Springer Science and Business Media LLC
Date: 17-11-2021
Publisher: Copernicus GmbH
Date: 10-2019
DOI: 10.5194/NHESS-19-2097-2019
Abstract: Abstract. Peak ground acceleration (PGA) and study area (SA) distribution for the Patna district are presented considering both the classical and zoneless approaches through a logic tree framework to capture the epistemic uncertainty. Seismicity parameters are calculated by considering completed and mixed earthquake data. Maximum magnitude is calculated using three methods, namely the incremental method, Kijko method, and regional rupture characteristics approach. The best suitable ground motion prediction equations (GMPEs) are selected by carrying out an “efficacy test” using log likelihood. Uniform hazard response spectra have been compared with Indian standard BIS 1893. PGA varies from 0.38 to 0.30 g from the southern to northern periphery considering 2 % probability of exceedance in 50 years.
Publisher: Springer Science and Business Media LLC
Date: 28-02-2017
Publisher: Springer Science and Business Media LLC
Date: 25-05-2019
Publisher: Public Library of Science (PLoS)
Date: 26-12-2018
Publisher: Copernicus GmbH
Date: 03-01-2019
Publisher: IGI Global
Date: 2013
Abstract: Even though the size of the earthquake is moderate, presence of soft soil near the surface can cause devastating damage due to local site and induced effects like liquefaction. Evidence of liquefaction due to past Indian earthquakes was highlighted in many Paleo-seismic studies, particularly in the Himalayan region. The objective of this paper is subsurface characterization of part Indo-Gangetic Basin (IGB) and estimation of liquefaction hazards for the possible surface ground motions based on the region seismic study. Drilling of boreholes and measurement of standard penetration N values are carried out at selected locations for subsurface characterization. Possibility of liquefaction for soil deposits are assessed by comparing the grain size distribution curves obtained from laboratory tests with the range of grain size distribution curves of potentially liquefiable soils. The minimum factor of safety values has been identified for each location and presented in the form of maps showing FOS against liquefaction for average and maximum lified peak ground acceleration (PGA) values. These maps have highlighted that the northern, western and central parts of Lucknow fall under very critical to critical for liquefaction while southern parts shows moderate to low critical area.
Publisher: Springer Science and Business Media LLC
Date: 24-04-2015
Publisher: American Society of Civil Engineers
Date: 15-02-2010
Publisher: No publisher found
Date: 2019
Publisher: Copernicus GmbH
Date: 12-04-2019
Publisher: Springer Science and Business Media LLC
Date: 25-07-2019
Publisher: ASTM International
Date: 2011
DOI: 10.1520/JTE103472
Publisher: Elsevier BV
Date: 03-2016
Publisher: Springer Science and Business Media LLC
Date: 17-10-2006
Publisher: Informa UK Limited
Date: 26-08-2016
Publisher: Springer Science and Business Media LLC
Date: 29-09-2021
Publisher: Copernicus GmbH
Date: 26-10-2006
Abstract: Abstract. Deterministic Seismic Hazard Analysis (DSHA) for the Bangalore, India has been carried out by considering the past earthquakes, assumed subsurface fault rupture lengths and point source synthetic ground motion model. The sources have been identified using satellite remote sensing images and seismotectonic atlas map of India and relevant field studies. Maximum Credible Earthquake (MCE) has been determined by considering the regional seismotectonic activity in about 350 km radius around Bangalore. The seismotectonic map has been prepared by considering the faults, lineaments, shear zones in the area and past moderate earthquakes of more than 470 events having the moment magnitude of 3.5 and above. In addition, 1300 number of earthquake tremors having moment magnitude of less than 3.5 has been considered for the study. Shortest distance from the Bangalore to the different sources is measured and then Peak Horizontal Acceleration (PHA) is calculated for the different sources and moment magnitude of events using regional attenuation relation for peninsular India. Based on Wells and Coppersmith (1994) relationship, subsurface fault rupture length of about 3.8% of total length of the fault shown to be matching with past earthquake events in the area. To simulate synthetic ground motions, Boore (1983, 2003) SMSIM programs have been used and the PHA for the different locations is evaluated. From the above approaches, the PHA of 0.15 g was established. This value was obtained for a maximum credible earthquake having a moment magnitude of 5.1 for a source Mandya-Channapatna-Bangalore lineament. This particular source has been identified as a vulnerable source for Bangalore. From this study, it is very clear that Bangalore area can be described as seismically moderately active region. It is also recommended that southern part of Karnataka in particular Bangalore, Mandya and Kolar, need to be upgraded from current Indian Seismic Zone II to Seismic Zone III. Acceleration time history (ground motion) has been generated using synthetic earthquake model by considering the revised regional seismotectonic parameters. The rock level PHA map for Bangalore has been prepared and these maps are useful for the purpose of seismic microzonation, ground response analysis and design of important structures.
Publisher: Springer Science and Business Media LLC
Date: 04-2017
Publisher: Springer Science and Business Media LLC
Date: 18-09-2017
Publisher: Public Library of Science (PLoS)
Date: 09-09-2016
Publisher: Springer Science and Business Media LLC
Date: 19-07-2016
Publisher: Elsevier BV
Date: 05-2010
Publisher: Springer Science and Business Media LLC
Date: 03-2009
Publisher: Springer Science and Business Media LLC
Date: 04-01-2022
Publisher: Elsevier BV
Date: 06-2013
Publisher: Informa UK Limited
Date: 10-06-2010
Publisher: Springer Science and Business Media LLC
Date: 15-05-2012
Publisher: Oxford University Press (OUP)
Date: 18-09-2017
Publisher: Elsevier BV
Date: 03-2014
Publisher: Informa UK Limited
Date: 16-01-2022
Publisher: Informa UK Limited
Date: 18-05-2020
Publisher: Springer Science and Business Media LLC
Date: 28-10-2014
Publisher: Springer Science and Business Media LLC
Date: 08-02-2016
Publisher: Indian Society for Education and Environment
Date: 30-11-2016
Publisher: Copernicus GmbH
Date: 03-01-2019
Abstract: Abstract. PGA and SA distribution for Patna district is presented considering both classical and zoneless approach through logic tree frame work to capture the epistemic uncertainty. Seismicity parameters are calculated by considering completed and mixed earthquake data. Maximum magnitude was calculated using three methods namely incremental method, Kijko method and regional rupture characteristics approach. Best suitable GMPE was selected by carrying out efficacy test using log likelihood. Uniform hazard response spectra have been compared with Indian standard BIS 1893. PGA varies from 0.38 g to 0.30 g from southern to northern periphery considering 2 % probability of exceedence in 50 years.
No related grants have been discovered for Anbazhagan Panjamani.