Multi-objective optimization of underground car park design for tenability under fire-induced smoke

Tharima, A.F., and Rahman, M.M., and Yusoff, M.Z., and Kueh, A.B.H. (2019) Multi-objective optimization of underground car park design for tenability under fire-induced smoke. Tunnelling and Underground Space Technology, 85. pp. 220-230. ISSN 0886-7798

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Abstract

The effects of the inclusion of design factors in optimization such as ceiling height, beam span length, transversal beam depth, longitudinal beam depth, and extraction fan rate on the tenability of car parks during fire were studied. Fire Dynamic Simulator (FDS) was employed as the simulation tool for response generation, from which the preliminary simulation results were firstly compared with published experimental data for validation. Responses such as smoke descent time, critical velocity, and temperature were optimized using the Response Surface Methodology (RSM). Thirty-two FDS models were constructed using the Central Composite Design (CCD) method and second-order models were formulated. The predicted responses from the second-order models were in good agreement with those obtained from FDS. In the optimized design, the smoke descent time was increased by 191.08% and the critical velocity was reduced by 61.67%. Meanwhile, the change of temperature was marginal. Moreover, by examining the flow result, the employment of two longitudinal beams from the optimized design could effectively channel the hot gasses to the downstream region. Overall, it was found that the presence of beams combined with the FDS statistical analysis could improve the tenability of enclosed car parks during fire.

Item Type: E-Article
Uncontrolled Keywords: Critical velocity, Design of experiment (DOE), Desirability functionFire dynamics simulator (FDS), Performance-based approach (PBA),Response surface methodology (RSM), Smoke descent time, Temperature, UNIMAS, university, Borneo, Malaysia, Sarawak, Kuching, Samarahan, IPTA, education, Universiti Malaysia Sarawak
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: 1 Student
Date Deposited: 04 Jun 2020 02:12
Last Modified: 29 Jun 2020 03:25
URI: http://ir.unimas.my/id/eprint/29619

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