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| 1 | Determination of blast-induced ground vibration equations for rocks using mechanical and geological properties显示文摘In the recent decades,effects of blast loads on natural and man-made structures have gained considerable attention due to increase in threat from various man-made activities.Site-specific empirical relationships for calculation of blast-induced vibration parameters like peak particle velocity(PPV) and peak particle displacement(PPD) are commonly used for estimation of blast loads in design.However,these relationships are not able to consider the variation in rock parameters and uncertainty of in situ conditions.In this paper,a total of 1089 published blast data of various researchers in different rock sites have been collected and used to propose generalized empirical model for PPV by considering the effects of rock parameters like unit weight,rock quality designation(RQD),geological strength index(GSI),and uniaxial compressive strength(UCS).The proposed PPV model has a good correlation coefficient and hence it can be directly used in prediction of blast-induced vibrations in rocks.Standard errors and coefficient of correlations of the predicted blast-induced vibration parameters are obtained with respect to the observed field data.The proposed empirical model for PPV has also been compared with the empirical models available for blast vibrations predictions given by other researchers and found to be in good agreement with specific cases. | Ranjan Kumar Deepankar Choudhury Kapilesh Bhargava | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，3： | 11 |
| 2 | Seismic passive earth resistance using modified pseudo-dynamic method显示文摘In earthquake prone areas,understanding of the seismic passive earth resistance is very important for the design of different geotechnical earth retaining structures.In this study,the limit equilibrium method is used for estimation of critical seismic passive earth resistance for an inclined wall supporting horizontal cohesionless backfill.A composite failure surface is considered in the present analysis.Seismic forces are computed assuming the backfill soil as a viscoelastic material overlying a rigid stratum and the rigid stratum is subjected to a harmonic shaking.The present method satisfies the boundary conditions.The amplification of acceleration depends on the properties of the backfill soil and on the characteristics of the input motion.The acceleration distribution along the depth of the backfill is found to be nonlinear in nature.The present study shows that the horizontal and vertical acceleration distribution in the backfill soil is not always in-phase for the critical value of the seismic passive earth pressure coefficient.The effect of different parameters on the seismic passive earth pressure is studied in detail.A comparison of the present method with other theories is also presented,which shows the merits of the present study. | Anindya Pain Deepankar Choudhury S. K. Bhattacharyya | 2017 | Earthquake Engineering and Engineering Vibration2017，16，2： | 2 |
| 3 | Seismic rotational displacement of gravity walls by pseudo-dynamic method: Passive case显示文摘 | Deepankar Choudhury Sanjay Nimbalkar | 2006 | Soil Dynamics and Earthquake Engineering2006，，3： | 1 |
| 4 | Sliding stability and seismic design of retaining wall by pseudo-dynamic method for passive case显示文摘 | Sanjay Nimbalkar Deepankar Choudhury | 2006 | Soil Dynamics and Earthquake Engineering2006，，6： | 1 |
| 5 | Computations of uplift capacity of pile anchors in cohesionless soil显示文摘 | V. B. Deshmukh D. M. Dewaikar Deepankar Choudhury | 2010 | Acta Geotechnica2010，，2： | 1 |
| 6 | Subba Rao Seismic bearing capacity of shallow strip footings显示文摘 | Deepankar Choudhury and Kanakapura S | 2005 | Geotechnicaland Geological Engineering2005，23，： | 1 |
| 7 | Stability of waterfront retaining wall subjected to pseudo-static earthquake forces显示文摘 | Deepankar Choudhury Syed Mohd. Ahmad | 2007 | Ocean Engineering2007，，14： | 1 |
| 8 | Dynamic analysis of buried pipeline with and without barrier system subjected to underground detonation显示文摘Failure of pipe networks due to blast loads resulting from terrorist attacks or construction facilities, may cause economic loss, environmental pollution, source of firing or even it may lead to a disaster. The present work develops a closed-form solution of buried pipe with barrier system subjected to subsurface detonation. The solution is derived based on the concept of double-beam system. Euler Bernoulli's beams are used to simulate the buried pipe and the barrier system. Soil is idealized as viscoelastic foundation along with shear interaction between discrete Winkler springs(advanced soil model). The finite SineFourier transform is employed to solve the coupled partial differential equations. The solution is validated with past studies. A parametric study is conducted to investigate the influence of TNT charge weight, pipe material, damping ratio and TNT offset on the response of buried pipe with and without barrier system. Further a statistical analysis is carried out to get the significant soil and pipe input parameters. It is perceived that peak pipe displacements for both the cases(with and without barrier) are increases with increasing the weight of TNT charge and decreases with increasing the damping ratio and TNT offset. The deformation of pipe also varies with pipe material. Pipe safety against blast loads can be ensured by providing suitable barrier layer. The present study can be utilized in preliminary design stage as an alternative to expensive numerical analysis or field study. | Chaidul Haque Chaudhuri Deepankar Choudhury | 2023 | Defence Technology(防务技术)2023，29，11： | 0 |
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