Experimental investigation of stress transients of blasted RC columns in the blasting demolition of buildings

Sun, Jinshan; Ying, Jia; Yao, Yingkang; Xie, Xianqi

doi:10.1016/j.engstruct.2020.110417

Cited by 24 publications

(7 citation statements)

References 13 publications

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“…These are converted into a voltage signal that measures the strain value. Finally, the strain is converted to stress according to Equations ( 4) and (5).…”

Section: Test Preparation and Designmentioning

confidence: 99%

“…[1][2][3][4] With the continuous expansion of the scale of urban construction and the rapid development of blasting technology, an increasing number of older high-rise buildings (structures) have been demolished by blasting. 5,6 However, there are some uncertainties in how blasting demolition can affect the safety of adjacent gas pipelines. Figure 1 shows an urban gas pipeline sited near building (or structures) to be demolished by controlled blasting.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Tang

et al. 2021

Energy Science & Engineering

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“…These are converted into a voltage signal that measures the strain value. Finally, the strain is converted to stress according to Equations ( 4) and (5).…”

Section: Test Preparation and Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Tang

et al. 2021

Energy Science & Engineering

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“…In recent years, computer technology has developed rapidly, and numerical simulation technology has gradually been widely used in the stability analysis of rock slopes under blasting vibration [20,21]. Among them, a series of numerical simulation verification studies have been carried out in the mine blasting process.…”

Section: Introductionmentioning

confidence: 99%

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

et al. 2022

Lithosphere

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The propagation process of blasting vibration has always been a difficult problem affecting the stability of high slopes in open-pit mines. Taking the Jianshan Phosphorus Mine as the research background, combined with engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation technology, and theoretical analysis, the three-dimensional dynamic stability of the adjacent high slope after blasting vibration was systematically studied. In our study, a small-diameter buffer shock-absorbing blasting technology near the slope was proposed, which greatly improved the production efficiency. Through regression analysis of a large amount of vibration test data, the law of blasting vibration propagation in Jianshan stope and Haifeng stope was obtained. In addition, by establishing four three-dimensional geomechanical numerical models, the slope’s own frequency, damping characteristics, and dynamic response acceleration distribution after detonation were studied, respectively. On the other hand, under the action of Ei Centro wave with 8-degree seismic intensity, the maximum total acceleration and maximum total displacement of the slope were calculated and analyzed. Both the explosion unloading of the 8-degree earthquake and the Ei Centro wave simulation results showed that the high slope near the Jianshan Phosphorus Mine was generally in a stable state. Thus, this study can provide technical support and theoretical guidance for mine blasting.

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“…As a rapid and economical means of concrete fragmentation, blasting demolition is widely used in demolition engineering. Compared with other demolition techniques, the advantage of blasting demolition is its short duration, which leads to reduced costs and reduced resource requirements [1,2]. However, many engineers worry are concerned that the collapse of structures may cause ground vibrations, which can threaten the safety of surrounding urban structures and communities (e.g., tunnels, underground pipelines, and aboveground buildings).…”

Section: Introductionmentioning

confidence: 99%

Forecasting the Collapse-Induced Ground Vibration Using a GWO-ELM Model

et al. 2022

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Blasting demolition is a popular method in the area of building demolishing. Due to the complex process of the building components’ collapse, it is difficult to predict the collapse-induced ground vibrations. As the accuracy of the empirical equation in predicting the collapse-induced ground vibration is not high, there is a significant risk of damage to the surrounding structures. To mitigate this risk, it is necessary to control and predict the peak particle velocity (PPV) and dominant frequency of ground vibration with higher accuracy. In this study, the parameters on the PPV and frequency of collapse-induced ground vibration are analyzed based on the Hertz theory. Then, fall tests are performed to simulate the collapse process of structural components and to investigate the characteristics of influential parameters on PPV and frequency. Using kernel density estimation (KDE) and Pearson correlation, the PPV and frequency are correlated with the distance from the falling point to the monitored point (R) and the mass of the falling structural component (M). Using recorded ground vibration data, the PPV and frequency are predicted using an extreme learning machine in combination with gray wolf optimization. The efficiency of the proposed algorithm is compared with other predictive models. The results indicate that the accuracy pre-diction of the proposed algorithm is better than those of plain extreme learning machines and the empirical equations, which indicates that the approach can be applied for PPV and frequency prediction of collapse-induced ground vibrations during blasting demolition.

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Experimental investigation of stress transients of blasted RC columns in the blasting demolition of buildings

Cited by 24 publications

References 13 publications

Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Experimental and numerical study of shallow‐buried high‐density polyethylene pipeline under collapse touchdown impact

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

Forecasting the Collapse-Induced Ground Vibration Using a GWO-ELM Model

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