Model Parameter Sensitivity for Structural Analysis of Composite Slab Structures in Fire

Suwondo, Riza; Cunningham, Lee S.; Gillie, Martin; Suangga, Made; Hidayat, Irpan

doi:10.14716/ijtech.v12i2.3919

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Many researchers have worked on the fire impacts on the reinforced concreted members specially the slabs [12][13][14][15]. The primary purpose of using the limit state equation is that it inhibits the effect of load (L) from exceeding the effect of resistance (R) that can lead to structural failure.…”

Section: Limit State Equationmentioning

confidence: 99%

Determination of structural reliability of a reinforced concrete slab under fire Load

et al. 2022

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Four reinforced concrete rooms are used in this study, with varying floor areas, openings, and fuel loads. These rooms are office, Classroom, computer, and chemical laboratories of institutional buildings. The time versus Eurocode (EC) parametric fire relationship is determined and compared with ISO 834 and ASTM 119. The performance of the slab is evaluated based on the EC target reliability index of 3.8 for 50 years design period using the First Order Reliability Method (FORM). The probability of failure and structural reliability of each fire compartment at different fire duration is determined. Variables used were concrete compressive strength, a reduction factor of concrete compressive strength, steel yield strength, concrete cover, slab depth, unit width, and area of steel reinforcement provided. The reliability is determined at each 30 minutes fire duration for all fire compartments. The starting point is ambient temperature, then after every thirty minutes until the time when the maximum gas temperature is reached. The fire compartments were able to show fire resistance for two hours and then started to drop over time. Yield strength reduction factor, concrete cover, and area of reinforcement respectively were the most significant variables to determine the reliability index. The structure was able to withhold fire until two hours with a reliability of more than 3.8after that, the slab reliability was less than the target reliability and will need a repair.

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Section: Limit State Equationmentioning

confidence: 99%

Determination of structural reliability of a reinforced concrete slab under fire Load

et al. 2022

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“…Eurocode 3 (CEN, 2005a) suggests a maximum time step of 30 s and the section factor F/V of no less than 10 m -1 . Previous studies (Gamble, 1989;Kay, Kirby and Preston, 1996;Rackauskaite, Kotsovinos and Rein, 2017;Suwondo et al, 2021) have revealed that this method can offer a reliable prediction of steel beam temperatures. Figure 5 presents the temperatures at the steel structures exposed to gas temperature (parametric fire).…”

Section: Figure 4: Typical Perimeter Of Section Factorsmentioning

confidence: 99%

Improving the robustness of steel frame structures under localised fire conditions

Suwondo

Cunningham

Gillie

et al. 2021

JSFE

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PurposeThe robustness of building structures in a fire has recently drawn wide attention. This study presents the progressive collapse analysis of steel frame building structures under localised fire. The main objective of this study is to propose methods to enhance the structural collapse resistance of such structures in fire.Design/methodology/approachA modelling method was developed and validated against both experimental and analytical studies. Then, a series of robustness analyses were performed to investigate the interaction among the members and the pattern of load distribution within the structures. These analyses show that lateral resistance and load redistribution have a vital role in the robustness of the building. Thus, two approaches have been adopted to enhance the robustness of the focused steel frame during a fire.FindingsIt is found that increased size of floor beams and vertical bracing systems are effective measures in preventing whole structure collapse. The larger beam section is able to prevent catenary action so that the load in the failed columns can safely transfer to the adjacent columns without buckling. On the other hand, the bracing system improves the lateral resistance that can accommodate the lateral force when catenary action occurs in the beam.Originality/valuePrevious studies have focused on the collapse mechanism of steel frame structures. However, the parameters affecting the structural robustness in a fire have not yet been explored. To address this gap, this study adopted numerical modelling to undertake parametric studies to identify effective methods to improve the robustness of such structures under fire conditions.

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Recent development and challenges in enhancing fire performance on wood and wood-based composites: A 10-year review from 2012 to 2021

Albert,

Liew

2024

Journal of Bioresources and Bioproducts

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Model Parameter Sensitivity for Structural Analysis of Composite Slab Structures in Fire

Cited by 4 publications

References 12 publications

Determination of structural reliability of a reinforced concrete slab under fire Load

Determination of structural reliability of a reinforced concrete slab under fire Load

Improving the robustness of steel frame structures under localised fire conditions

Recent development and challenges in enhancing fire performance on wood and wood-based composites: A 10-year review from 2012 to 2021

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