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Designing Resilient Thin Shell Structures: A Comprehensive Approach to Extreme Loading Resistance in Building Foundations
(2025-03-01)
Nassir, Azizah Abdul
;
Min, Yee Hooi
;
Petchsasithon, Arthit
;
Senin, Syahrul Fithry
This study aims to explore the potential of thin shell structures as large foundations to improve flood resilience and enhance structural robustness. While thin shell structures have shown promise in resisting various loads, their application as foundations for buildings has not been fully investigated. Thus, this study focuses on designing the necessary reinforcement for a proposed thickness of 304mm. The reinforcement design follows Eurocode 2 guidelines, utilizing T32-300 as the main reinforcement rebar of the thin shell and 5T40 and 4T40 rebars for compression and tension of the ring beam, respectively. R12-150 links are incorporated for added strength and connectivity. This optimized design approach extends the application of thin shell structures beyond lightweight usage, making them viable for withstanding hydrodynamic and seismic loads. This advancement expands possibilities for architects and engineers and improves the resilience of buildings in flood-prone areas. Overall, this study presents a comprehensive design procedure for utilizing thin shell structures as large foundations, contributing to the development of resilient buildings capable of withstanding extreme conditions and safeguarding lives and infrastructure.
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Sustainable thin shell analysis on structural foundation subjected to seismic loads
(2023-01-01)
Nassir, Azizah Abdul
;
Min, Yee Hooi
;
Petchsasithon, Arthit
;
Senin, Syahrul Fithry
Shell structures are recognized for their exceptional performance in withstanding compression forces, often utilized as roof components. However, Southeast Asia experiences significant annual losses due to floods, with inadequate structural mitigation despite high population concentrations in seismic risk areas. Previous research explored thin shell structures as elevated foundations to mitigate flood effects on buildings. Unfortunately, the proposed shell design exceeded the material's strength limit of 40N/mm2, limiting its feasibility. To address this, our study proposes a modified thin shell with a 600mm thickness. Finite Element analysis using LUSAS software evaluated the new design's structural behavior under dynamic loads from earthquakes and flood-induced waves. Results demonstrate a substantial reduction of up to 99% in equivalent stress compared to the previous model [Model P]. The revised model [Model C] proves feasible in withstanding intense building loads, ensuring maximum stress remains below the concrete material's strength limit. Implementation of these findings offers valuable structural mitigation, reducing flood impacts and enhancing both structural resilience and human safety.
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Optimization of a heavy-duty elevated thin shell structure
(2022-08-01)
Nassir, Azizah Abdul
;
Min, Yee Hooi
;
Petchsasithon, Arthit
;
Senin, Syahrul Fithry
Optimization means the mathematical determination of the optimal decisions out of diverse alternatives. Based on the preceding Finite Element Analysis (FEA), a proposed shell produced a maximum stress that exceeded the design value. To make the design feasible, an optimization was done to minimize the maximum stress by using the gradient method. The performance of the structure can be optimized to fulfil the design requirements with the optimum value of displacement to achieve the objective function. The results show that the optimum displacement is 8.8mm, which reduced the maximum stress by 99.94% from the initial level. Thus, optimization methods are important for new applications of shell structures to find their best parameters in the design stage.

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