Damage evaluation of structures subjected to the effects of underground explosions

Kumari, Rajesh; Lal, Harbans; Bola,; Sethi, V.S.

doi:10.1016/b978-008043875-7/50163-5

Cited by 2 publications

(2 citation statements)

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“…3 (the percentage representing the ratio of effective duration to duration). The previous result showed there is only a small part of explosive energy contributing to the generation of ground motion [2]. Fig.…”

Section: Advanced Materials Research Vols 594-597mentioning

confidence: 73%

“…Analysis results of exploding ground motion indicated that explosive vibrations could be used to investigate the responses of full-scale structures on near-field earthquake [1]. Kumari et al reported that a small fraction of explosive energy about 3% results in the generation of strong ground motion in the near region [2]. Lou et al analyzed characteristics of blasting seismic waves and adopted integral values of response spectrum curves to investigate the relation between response spectrum and blasting vibration velocity/frequency [3].…”

Section: Introductionmentioning

confidence: 99%

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Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Sun

Wang

Tian

2012

AMR

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Based on in-situ observational data, we analyzed energy features of strong ground motion induced by short delay blasting in unsaturated loess field through three aspects of time history, frequency spectrum and attenuation. For time histories, the data show exploding ground motion has two essential characteristics, i.e. larger peak ground acceleration (PGA) and shorter duration. Analysis results reveal the effective duration (ground acceleration exceeding a certain magnitude) is the pivotal factor influencing design effects of the blasting. The spectral response, meanwhile, attenuates with the increase of observational distances (apart from the centre of exploding field), especially for those higher frequency components. Values of H/V figured relative features of horizontal component to vertical one of frequency spectrum of exploding ground vibration become greater while distances widen. As exploding energy accumulated, moreover, lower frequency energy distinctly increases and the feature of frequency spectrum of the strong shock gradually approaches an actual seismic oscillation.

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Section: Advanced Materials Research Vols 594-597mentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Sun

Wang

Tian

2012

AMR

View full text Add to dashboard Cite

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Difference Analysis of Loess Seismic Subsidence between <i>In Situ</i> Experiment and Laboratory Test

Wang

Sun

2012

AMR

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Seismic subsidence of loess is a kind of disaster induced by strong ground motion in loess area, while seldom example of this subsidence was found in long time study, usually instead of laboratory test. An explosion ground motion in a typical loess field was designed to verify seismic subsidence of loess with natural condition and laboratory test of loess seismic subsidence was conducted in China. The result proved seismic subsidence of loess could be induced by explosion ground motion, while the maxmuim settlement of 3.3cm in the case of experiment is much less than 53cm with a moderate or strong dynamic stress in laboratory due to an incomplete seismic subsidence of loess in this field. The seismic subsidence of toper loess layers is less than the below in the field test although it is opposite to in laboratory test due to closer distance between the below layers and explosion shots.

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Damage evaluation of structures subjected to the effects of underground explosions

Cited by 2 publications

References 3 publications

Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China

Difference Analysis of Loess Seismic Subsidence between <i>In Situ</i> Experiment and Laboratory Test

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