Development of Absorbed Blasting Vibration Energy Index for the Evaluation of Human Comfort in Multistorey Buildings

Yao, Qiang; Yang, Xing-guo; Li, Hongtao

doi:10.1155/2017/9567657

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Humans are particularly sensitive to vibrations with frequencies between 8 to 5Hz that corresponding to typical natural frequencies of many main organs in the body [21], [22]. Hence, the vibration signals with higher frequencies can cause a variety of bad human subjective experiences [23]. Due to these main circumstances, the first mode predominant frequency, f1, of the steel stairwell is becoming the main concern in this study against the resonance potential between person-structure interactions.…”

Section: Results and Discussion 31 Natural Frequenciesmentioning

confidence: 99%

Evaluation of Steel Stairwell Dynamic Characteristics, Under Few Mass Configurations Using Ambient Vibration Method

Kamarudin¹,

Mokhatar²,

Noh³

et al. 2019

IJIE

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Application of external mass on existing emergency steel stairwell in this study has altered the natural frequency when the resonance threshold has been reached and allows disruption to the human comfort feeling. Ambient vibration testing and modal analysis were carried out on 6 meter height of emergency steel stairway portal frame by using 1 Hz of tri-axial seismometer sensor and open source software of GEOPSY as the processing tool. The stairwell platforms were subjected by cumulative ascending static mass configurations of 300 kg, 600 kg and 900 kg. Identification of the predominant first mode frequency, f1, and mode shapes were made with specified empirical filtering protocols were applied. Fourier Amplitude Spectra (FAS) was used to transform the ambient vibration time series, when the first predominant frequency under bare frame (BF) condition shows at 8.32 Hz. f1 decreased linearly to 7.35 Hz (BF+300kg), 6.77 Hz (BF+600kg) and 6.23 Hz (BF+900 kg), when the masses were increased. In addition, at these frequencies' ranges, bad human subjective experiences could be triggered as recommended by previous researchers between 8 to 5 Hz. Besides, the deflection shapes from the first mode frequency was also illustrated at higher deflection amplitude to one of the portal frame's column which resisting two stairwell platforms. These amplitudes are higher when f1 is decreasing. It can be concluded that, ambient vibration approach has efficiently evaluated the dynamic characteristics and its influence against the structureperson interaction on existing steel stairwell portal frame in this study. Further strengthening work on the steel frame could decrease the reductions percentages of the predominant frequencies, deflection amplitudes and even increase the human comfort level when using the stairwell, especially during building evacuation procedure.

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Section: Results and Discussion 31 Natural Frequenciesmentioning

confidence: 99%

Evaluation of Steel Stairwell Dynamic Characteristics, Under Few Mass Configurations Using Ambient Vibration Method

Kamarudin¹,

Mokhatar²,

Noh³

et al. 2019

IJIE

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“…ere is a close correlation between the subjective BVCE model and evaluation indices. Based on the theoretical analysis and literature search, a large number of statistical analyses of survey data have clearly shown that the comfort of blasting vibration is mainly affected by six factors: ABVE [35,36], blasting noise, environmental vibration, environmental noise, ongoing activities, and home ownership status [34]. In combination with domestic and foreign study, this paper takes into comprehensive consideration the classification and importance of BVCE indices, of which the index system is divided into three layers, namely, the target layer, criterion layer, and index layer.…”

Section: Bvce Indicesmentioning

confidence: 99%

A Fuzzy AHP‐Based Method for Comprehensive Blasting Vibration Comfort Evaluation Forecast

Yao

Yang

2020

Advances in Civil Engineering

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Blasting vibration comfort evaluation (BVCE) is an emerging interdisciplinary multilayer and multifactor issue that involves explosion mechanics, structural dynamics, biodynamics, statistics, psychology, and many other disciplines. The evaluation index system of blasting vibration comfort is divided into three levels: target level, criterion level, and index level. The absorption blasting vibration energy (ABVE) value is calculated based on triangular membership function, while the value of residual subjective evaluation index is obtained based on evaluation standard. The weight of each index is determined using the analytic hierarchy process. By developing the mathematical models, defining and quantifying the BVCE indices, and analyzing the factors that influence blasting vibration comfort in a hierarchical manner, this study proposes an exploratory fuzzy AHP-based method for comprehensive BVCE. The feasibility\reliability of this method is verified on the basis of 166 groups of comfort survey data. It is found that more than 85% and 62% of forecast results had an error of less than 1.0 and 0.5, respectively. The aim of combining qualitative and quantitative approaches to evaluate and forecast blasting vibration comfort can be initially realized. Further sensitivity analyses show that the absorbed blasting vibration energy (ABVE) index had the most significant influence, followed by environmental vibration, environmental noise, blasting noise, and lastly other factors on blasting vibration comfort. The presented results can provide a reference and guidance for actively creating the favorable conditions in blasting construction practice to improve the resident comfort and to realize the goal of “undisturbing, safe, and harmonious blasting construction.”

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“…The impact may cause damage to the objects as well an unpleasant feelings and fear in people. Many authors have studied and proved that sensitivity of the human body to the blasting effects is more than 10 times greater than of sensitivity of the buildings [1][2]. By knowing the rock mass characteristics, status and type of potentially endangered structure, and blasting parameters, blasting works can be executed in a safe and secure way [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Simplified Model for Determining Rock Mass Oscillation Velocity at Limestone Deposit

Lutovac¹,

Gluščević²,

Gligorić³

et al. 2022

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As a way of exploitation in mining operation, mass blasting has the more application. However, usage the large amount of explosives leads to increasing the negative blasting effects. By the negative blasting effects, we mean seismic effect of blasting, sound effect, scattering of blasted rock mass, etc. In order to protect environment from shock when performing blasting it is necessary to define rock mass oscillation equation for each working site. This paper offers the analysis of the method for defining parameters of the oscillation equation. To define parameters in the rock mass oscillation equation, we have used five models. The first model represents a usual model – method of Least Squares. The second model is based on the quotient of the value of the equal number of experimental data of oscillation velocity and corresponding reduced distances. The third model is based on defining parameters of oscillation equation by applying Lagrange’s theorem. The fourth model is based on defining parameters for oscillation equation by applying the quotient of relative oscillation velocity increments and reduced distances. As the result of numerous measuring’s there has been noted that the value of one of the parameters in the oscillation equation is within the limits from 1 to 3, however most frequently from 1 to 2. On the basis of this as well as on the basis of oscillation equation characteristic, the value of one parameter was adopted. Thus, we got a new rock mass 292 oscillation equation which is now simpler, and we designated it as the fifth model. On the basis of calculation on concrete example of mass blasting, it has been stated that all mentioned models may be used in order to calculate rock mass oscillation velocity

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Development of Absorbed Blasting Vibration Energy Index for the Evaluation of Human Comfort in Multistorey Buildings

Cited by 3 publications

References 12 publications

Evaluation of Steel Stairwell Dynamic Characteristics, Under Few Mass Configurations Using Ambient Vibration Method

Evaluation of Steel Stairwell Dynamic Characteristics, Under Few Mass Configurations Using Ambient Vibration Method

A Fuzzy AHP‐Based Method for Comprehensive Blasting Vibration Comfort Evaluation Forecast

Simplified Model for Determining Rock Mass Oscillation Velocity at Limestone Deposit

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