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1. CFD Analysis on Fire Characteristics of Subway Station with Different Ventilated Exhaust Mode | |||
Liu Xin,Han Xin | |||
Civil and Architectural Engineering 17 December 2012 | |||
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Abstract:In this paper, based on an island platform of a double-subway station, FDS was used to simulate the fire scenario of luggage fire close to the stair in the middle of platform, with different ventilated exhaust mode. Temperature and smoke concentration were analyzed, and results were compared. The results showed that without mechanical smoke exhaust, smoke drop to 2m above the floor ground at about 600s and any stairs is unavailable, while each stair is available for evacuation when smoke exhaust is on; the validity of platform smoke exhaust is critical to the control of fire development and evacuation safety when 1.5MW luggage fire is on in the middle of platform, while train area exhaust and concourse make-up air have little effect on smoke control under this circumstance. | |||
TO cite this article:Liu Xin,Han Xin. CFD Analysis on Fire Characteristics of Subway Station with Different Ventilated Exhaust Mode[OL].[17 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4503284 |
2. Dynamic analysis of semi-infinite soil based on 3-D finite-infinite element coupling method | |||
CAO Yanmei,ZHAO Binghua | |||
Civil and Architectural Engineering 30 October 2012 | |||
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Abstract:On the basis of the principles of finite element method and infinite element method, the 3-dimensional finite element and infinite element coupling model is established to solve the dynamic responses of semi-infinite soil. In the method, the finite element model with eight-node hexahedron solid element is adopted in the nearer field, and while in the farther field three types of infinite elements are applied, including 3-dimensional monodirectional, bidirectional, and three-way mapping infinite element, in which different infinite element is coupled with finite element on different position of interface. In addition, shape functions of infinite elements are derived by means of their mapping functions. Moreover, the effectiveness of this method is validated by comparing calculated results and analytical solution under static loading. Finally, the dynamic responses of semi-infinite soil under moving constant load and moving harmonic load are caculated and it is found that acceleration increases with the increase of moving speed and loading frequency of load. | |||
TO cite this article:CAO Yanmei,ZHAO Binghua. Dynamic analysis of semi-infinite soil based on 3-D finite-infinite element coupling method[OL].[30 October 2012] http://en.paper.edu.cn/en_releasepaper/content/4493544 |
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