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A platform for research: civil engineering, architecture and urbanism
Prediction of far-field blast loads from large TNT-equivalent explosives on gabled frames
Abstract The aim of this study is to develop an empirical approach for predicting far-field blast loads from large TNT-equivalent explosives on gabled frames. For different load cases and gabled frame structures, numerical simulations were performed using a validated method. Results of the numerical simulation cases were fitted, and explicit equations for calculating the blast load parameters were derived. The polynomial functions of the peak incident overpressure and the ratio of the wavelength to the span were fitted to determine the positive phase duration time and rise time. The drag coefficients of the roof and rear wall were determined using the interior-point optimization method. The 2nd-degree polynomial logarithmic relationship between the equivalent load factor and the ratio of the wavelength to the span was fitted using the drag coefficients. The drag coefficients of the blast loads on the front wall were expressed as functions of the peak incident overpressure and the ratio of the wavelength to the span based on the numerical simulation results. The proposed approach was validated against numerical simulation cases excluded from the fitted cases.
Graphical abstract Display Omitted
Highlights Blast loads from large TNT-equivalent explosives on gabled frames Formulae to determine temporal properties of the blast loads The drag coefficients of structures with sloping roofs Application of the space-time conservation element and solution method
Prediction of far-field blast loads from large TNT-equivalent explosives on gabled frames
Abstract The aim of this study is to develop an empirical approach for predicting far-field blast loads from large TNT-equivalent explosives on gabled frames. For different load cases and gabled frame structures, numerical simulations were performed using a validated method. Results of the numerical simulation cases were fitted, and explicit equations for calculating the blast load parameters were derived. The polynomial functions of the peak incident overpressure and the ratio of the wavelength to the span were fitted to determine the positive phase duration time and rise time. The drag coefficients of the roof and rear wall were determined using the interior-point optimization method. The 2nd-degree polynomial logarithmic relationship between the equivalent load factor and the ratio of the wavelength to the span was fitted using the drag coefficients. The drag coefficients of the blast loads on the front wall were expressed as functions of the peak incident overpressure and the ratio of the wavelength to the span based on the numerical simulation results. The proposed approach was validated against numerical simulation cases excluded from the fitted cases.
Graphical abstract Display Omitted
Highlights Blast loads from large TNT-equivalent explosives on gabled frames Formulae to determine temporal properties of the blast loads The drag coefficients of structures with sloping roofs Application of the space-time conservation element and solution method
Prediction of far-field blast loads from large TNT-equivalent explosives on gabled frames
Ding, Yang (author) / Zhang, Xuan (author) / Shi, Yanchao (author) / Zhang, Huishen (author)
2021-12-28
Article (Journal)
Electronic Resource
English
Nonlinear analysis of gabled frames under static loads
| Elsevier | 1989
| Engineering Index Backfile | 1955
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Discussion of “Multiple-Span Gabled Frames”
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Closure to “Multiple-Span Gabled Frames”
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