Building damage due to vibration from rock blasting

Norén-Cosgriff, Karin; Ramstad, N.; Neby, Arild; Madshus, C.

doi:10.1016/j.soildyn.2020.106331

Cited by 25 publications

(10 citation statements)

References 4 publications

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“…The change in the upper bound can be understood as the attenuation of the high-frequency part of the dominant frequency, in which the dominant frequencies in the X-and Y-directions decay rapidly, whereas that in the Z-direction (transverse) decays gradually. The characteristic that the dominant frequency gradually attenuates with the increase in the distance is mainly caused by the damping of the surrounding rock and the high-frequency absorption by the nonlinear properties [4]. An alternative explanation for these phenomena may be that the vibration waves close to the blast are more affected by characteristics of blast design, while at larger distances the propagating medium dominates the vibration response [4].…”

Section: Resultsmentioning

confidence: 99%

“…Sun [28] believed that the ZCF can better express the attenuation law of the dominant frequency than DF and MF, whereas according to Blair [29], the well-known zero-crossing method cannot be used to obtain the frequency associated with the peak vibration level. In addition, Nor'en-Cosgriff [4] found that the dominant frequencies determined by different methods vary significantly. Therefore, considering that there is no uniform method to describe the frequency in the current research on blast vibration waves, both ZCFs and DFs are used to describe the blast vibration frequency.…”

Section: Theory Of Dominant Frequencymentioning

confidence: 99%

“…In blasting engineering, a part of the explosion energy is used to break a rock and the remainder is transmitted to the surrounding rocks by the blasting vibration waves [1,2], which may be a significant threat to the safety of the adjacent structure [3,4]. In smallspacing tunnels, after the primary support and secondary lining of the preceding tunnel are completed, its structure and the middle rock pillar may be affected by the blasting vibrations of the succeeding tunnel, which are manifested as seismic cumulative effects [5].…”

Section: Introductionmentioning

confidence: 99%

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Study on Dominant Frequency Attenuation of Blasting Vibration for Ultra-Small-Spacing Tunnel

et al. 2022

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The middle rock pillar in ultra-small-spacing tunnels is significantly narrow, and the stability of the primary support and lining are easily influenced by the blasting vibration wave from an adjacent tunnel. Therefore, understanding the vibration frequency characteristics is essential for the blasting vibration control. Based on the blasting works on a double-track roadway tunnel (Jiuwuji tunnel in Guizhou, China), this study investigates the dominant frequency attenuation in the preceding tunnel with the middle rock pillar spacing ranging from 4.0 m to 9.4 m. The results show that the ranges of the dominant frequency distributions on the primary support and lining are widely within 200 Hz, but there are varieties in their propagation laws. The distribution of the dominant frequencies on the primary support is broader than that on the lining; and the dominant frequencies are concentrated on a specific range when the lining is far from the blast face beside a particular value, which is not present on the primary support. As the presence of cavity and changing medium between the lining and the primary support, it made a significant contribution to the filtering the vibration waves. Furthermore, on the primary support, the high-frequency part of the vibration waves attenuates rapidly with distance, and then, the practical prediction equations describing dominant frequency attenuation were proposed. The comparison on frequency characteristics per delay for the millisecond delay blasting shows that multiple delay sequences blast contributes to a multi-structured amplitude spectrum of blast vibration waves; and the varies of the equivalent explosion sources dimensions and numbers of free surfaces in each blast delay resulting in diverse vibration waveforms. Finally, the dominant frequencies determined by different methods were compared, and the results show a nonlinear relationship between the ZCFs and DFs. The above research conclusion expands the understanding of blasting vibration in tunnel engineering, particularly in the frequency distribution.

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Section: Resultsmentioning

confidence: 99%

Section: Theory Of Dominant Frequencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on Dominant Frequency Attenuation of Blasting Vibration for Ultra-Small-Spacing Tunnel

et al. 2022

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“…These data were recorded on a computer were used to establish the relationship between the bridge response and thermal loading. Finally, FBG sensors have been implemented in monitoring damage in buildings due to vibration from rock blasting by Norén-Cosgriff et al [43]. Two buildings were constructed and instrumented with FBG strain sensors to measure their damage when subjected to blast loading.…”

Section: Fiber Bragg Gratingmentioning

confidence: 99%

Recent Advancements in Non-Destructive Testing Techniques for Structural Health Monitoring

et al. 2021

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Structural health monitoring (SHM) is an important aspect of the assessment of various structures and infrastructure, which involves inspection, monitoring, and maintenance to support economics, quality of life and sustainability in civil engineering. Currently, research has been conducted in order to develop non-destructive techniques for SHM to extend the lifespan of monitored structures. This paper will review and summarize the recent advancements in non-destructive testing techniques, namely, sweep frequency approach, ground penetrating radar, infrared technique, fiber optics sensors, camera-based methods, laser scanner techniques, acoustic emission and ultrasonic techniques. Although some of the techniques are widely and successfully utilized in civil engineering, there are still challenges that researchers are addressing. One of the common challenges within the techniques is interpretation, analysis and automation of obtained data, which requires highly skilled and specialized experts. Therefore, researchers are investigating and applying artificial intelligence, namely machine learning algorithms to address the challenges. In addition, researchers have combined multiple techniques in order to improve accuracy and acquire additional parameters to enhance the measurement processes. This study mainly focuses on the scope and recent advancements of the Non-destructive Testing (NDT) application for SHM of concrete, masonry, timber and steel structures.

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“…Keys et al [12] carried out two experimental trials to obtain a baseline set of results for the breakage mechanisms and debris distribution and developed a new method to predict the spatial debris distribution. Norén-Cosgriff et al [13] observed the onset of cracking of building and measured air blast overpressure and vibrations on the ground surface.…”

Section: Introductionmentioning

confidence: 99%

Research on Damage Characteristics of Brick Masonry under Explosion Load

Wei

Zheng

et al. 2021

Shock and Vibration

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As the main structural component of partition wall or load-bearing wall, brick masonry has been widely used in construction engineering. However, brick and mortar are all brittle materials prone to crack. Nowadays, fireworks, gas stoves, high-pressure vessels, and other military explosives may explode to damage nearby structures. Many explosion casualties had shown that the load-bearing capacity of brick masonry decreased dramatically and cracks or fragments appeared. Previous studies mainly focused on noncontact explosion in which shock wave is the main damage element. In fact, the response and damage effect of brick masonry wall under contact explosion are more complex, which attracts more attention now. In order to explore the damage characteristics of brick masonry under explosion load, a series of simulations and verification experiments are conducted. RHT and MO granular material models are introduced to describe the behaviour of brick and masonry, respectively, in simulation. The combination effect of front compressive wave and back tensile wave are main factors influencing the breakage of masonry wall. The experimental results are well in accordance with the simulation results. The front cross section dimension of crater is closely related to the radius of spherical explosive charge. A power function predictive model is developed to express the relationship between the radius of hole and the radius of explosive. Furthermore, with increasing the quantity of explosive charge, the number and ejection velocity of fragments are all increased. The relationship between maximum ejection velocity and the quantity of explosive also can be expressed as a power function model.

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Building damage due to vibration from rock blasting

Cited by 25 publications

References 4 publications

Study on Dominant Frequency Attenuation of Blasting Vibration for Ultra-Small-Spacing Tunnel

Study on Dominant Frequency Attenuation of Blasting Vibration for Ultra-Small-Spacing Tunnel

Recent Advancements in Non-Destructive Testing Techniques for Structural Health Monitoring

Research on Damage Characteristics of Brick Masonry under Explosion Load

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