Dynamic responses of underground arch structures subjected to conventional blast loads: Curvature effects

• Autorzy: Chen H. L. , Xia Z. C. , Zhou J. N. , Fan H. L. , Jin F. N.
• Języki publikacji: EN

Abstrakty

EN

The present study explored dynamic responses of underground circular arch structures subjected to subsurface conventional denotation. Analytical solutions were obtained through the modal superposition method. The soil–structure interaction, behaving as an interfacial damping, was included and the effect of different soils was investigated. Two soil–structure interaction models were discussed and compared. In Model I, the curvature of the structure surface and the arrival time difference were considered, while in Model II, the curvature of the structure surface was ignored but the arrival time difference to the structure was considered. Due to the complexity of the arch structure, a simplified structure model, neglecting the effect of shear and rotary inertia, was employed. The time histories of displacement, velocity and acceleration were predicted. Distributions of maximum moment and displacement were plotted using the result of responses. Blast loads in elastic designs were suggested and potential failure modes were predicted. Considering the curvature effect, Model I suggested greater reflection factors and dynamic loads subjected to the arch. Safety of structure could be evaluated by the results of responses. For safety purpose, the protective structures are better to be constructed in a site with small acoustic impedance and a large attenuation factor.

Słowa kluczowe

EN

dynamic soil–structure interaction; forced vibration; underground arches; conventional blast; curvature effect

PL

struktura gleby; wibracje; detonacja

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2013
• Tom: Vol. 13, no. 3
• Strony: 322--333
• Opis fizyczny: Bibliogr. 27 poz., rys., tab., wykr.

Twórcy

autor

Chen H. L.

• State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, College of Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China

autor

Xia Z. C.

• State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, College of Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China

autor

Zhou J. N.

• State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, College of Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China

autor

Fan H. L.

• State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China

autor

Jin F. N.

• State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, College of Defense Engineering, PLA University of Science and Technology, Nanjing 210007, China

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