STUDY ON THE EFFECT OF TUNNEL SLOPE AND BLOCKAGE ON CRITICAL VELOCITY IN URBAN TUNNELS

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RAOUFI MASOOMEH; MAZAHERI KIUMARS

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:11 Page(s): 37-46

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Title

STUDY ON THE EFFECT OF TUNNEL SLOPE AND BLOCKAGE ON CRITICAL VELOCITY IN URBAN TUNNELS

Author(s)

RAOUFI MASOOMEH | MAZAHERI KIUMARS | Issue Writer Certificate

Keywords

FIREQ2

TUNNELQ2

CRITICAL VELOCITYQ2

TUNNEL SLOPEQ2

VEHICLE BLOCKAGEQ2

Abstract

Over the past years, the issue of FIRE in transport TUNNELs has become an important concern. FIRE safety is now one of the important elements in TUNNEL design. For this reason, many TUNNELs are equipped with longitudinal ventilation systems to control smoke in the event of FIRE. In this study, TUNNEL FIRE simulation is done with open-source software FDS, and study on the CRITICAL VELOCITY is done in TUNNEL FIRE. The effect of geometrical parameters on the CRITICAL VELOCITY is studied. TUNNEL slope and blockage is studied to investigate the effects of geometrical parameters. In TUNNEL slope study part, propagation and behavior of smoke is studied for slopes between -10 and +10 degrees. In positive slopes of TUNNEL, FIRE plume is spread to the downstream of TUNNEL and in negative slopes of TUNNEL, FIRE plume is spread to the upstream of TUNNEL. It is observed that with increasing from negative slopes to positive slopes of the TUNNEL, the CRITICAL VELOCITY decreases linearly with increasing TUNNEL slope. TUNNEL blockage is studied for one vehicle and 30 vehicles. The results of study on vehicular blockage show that the CRITICAL VELOCITY decreases with increasing percent of blockage.

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APA: Copy

RAOUFI, MASOOMEH, & MAZAHERI, KIUMARS. (2015). STUDY ON THE EFFECT OF TUNNEL SLOPE AND BLOCKAGE ON CRITICAL VELOCITY IN URBAN TUNNELS. MODARES MECHANICAL ENGINEERING, 14(11), 37-46. SID. https://sid.ir/paper/179515/en

Vancouver: Copy

RAOUFI MASOOMEH, MAZAHERI KIUMARS. STUDY ON THE EFFECT OF TUNNEL SLOPE AND BLOCKAGE ON CRITICAL VELOCITY IN URBAN TUNNELS. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(11):37-46. Available from: https://sid.ir/paper/179515/en

IEEE: Copy

MASOOMEH RAOUFI, and KIUMARS MAZAHERI, “STUDY ON THE EFFECT OF TUNNEL SLOPE AND BLOCKAGE ON CRITICAL VELOCITY IN URBAN TUNNELS,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 11, pp. 37–46, 2015, [Online]. Available: https://sid.ir/paper/179515/en

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