Petchsasithon, Arthit

Preferred name

Alternative Name

Petchsasithon, A.

Main Affiliation

School of Engineering

arthit.pe@kmitl.ac.th

Now showing 1 - 7 of 7

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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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Seismic Retrofit of RC Building with Elastic Stage of Buckling-Restrain Braces
(2023-01-01)
Thipprapan, Thanawat
;
Jarasjarungkiat, Amphon
;
Saingam, Panumas
;
Petchsasithon, Arthit
Seismic retrofit of a reinforced concrete (RC) building using a buckling-restrained brace is an innovative method to improve the seismic performance of the existing RC buildings to resist damage from the future earthquake. This research proposes a simple method to retrofit RC buildings with buckling-restrained braces (BRBs). A 4-story school reinforced concrete building in Thailand is selected as a target building. The analysis results of the existing RC building indicate that the structure cannot withstand the seismic force under the newest code, which was published in 2021. There were failures at the columns of the 1<sup>st</sup>–3<sup>rd</sup> floors, in which lateral displacements exceeded the current seismic design standard. After retrofitting the target building by the proposed method with BRBs, it was found that the lateral displacements are reduced and the target RC building can withstand the seismic demand of the newest code. Therefore, the retrofitted building can be resisted future earthquakes. This shows the effectiveness of the introduced retrofit method.
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Linking engineering approach and local wisdom in water sensitive urban design as an adaptation strategy to climate change
(2020-03-03)
Permana, A. S.
;
Petchsasithon, A.
The impacts of climate change on cities have been clearly identified. Climate change threats the cities on urban infrastructure, urban life and well-being, urban environment and entire urban system. One of the most obvious impacts of climate change on urban system is the presence of more vulnerability of cities on urban floods due to global sea rise. This is particularly valid for coastal cities. While mitigation strategies could not be comprehensively completed in short time, the adaptation strategies could, therefore, be undertaken to complement the overall strategies to minimize the impacts. An engineering approach can be done at micro-level but should not be the only solution among many possible ways out. Urban planning and design, on the other hand, could be implemented at macro-level. Water sensitive urban design aims at minimizing the negative impacts of water-associated delinquencies through city planning and design. This study attempts to juxtapose the possible engineering approaches to cope with the impacts of climate change in the city at individual micro-level buildings as a way of the urban citizens to adapt to climate change impacts. The engineering solutions proposed in this study are discovered from various studies around the world and adjusted to local conditions taking into account locally available technologies for proper suitability and the solutions are therefore technologically possible, locally adaptable and environmentally friendly. The local wisdom on climate change adaptation itself has been observed in Southeast Asian countries.
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Advanced structural design for the construction of pressure- and temperature-resistant buildings
(2023-01-01)
Sonthironnachai, Boonchai
;
Petchsasithon, Arthit
Explosive loads from internal and external blasts occurring simultaneously and continuously cause severe structural damage and thermal extremity. Thus, the design of explosion-resistant structures differs vastly from that of typical buildings. For instance, they must be able to withstand dead and live loads, blasts, and extreme pressure and temperature loads. The present research aimed to develop an advanced structural design for explosion-resistant buildings and examine their resistance to three types of explosive loads causing both internal and external damage: the pressure of 300 bar, the temperature of 300 °C, and the pressure of 300 bar combined with the temperature of 300 °C. To achieve the research objective, explosions were simulated before their effects on the primary structural reinforcements, i.e. slabs, beams, and columns, of the five- and two-story buildings under investigation were analyzed in terms of explosion-related parameters using the finite element method (FEM). It was found that the loads from pressure combined with temperature were more destructive to the five-story building than to the two-story building. In addition, the former was more severely affected by the reaction force and reaction moment caused by the simulated explosions than the latter. Recommendations are made regarding advanced structural design for the construction of explosion-resistant buildings.
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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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Information Acquisition and Seismic Damage Prediction of Masonry Structures in Rural Areas Based on UAV Inclined Photogrammetry
(2024-01-01)
Kong, Chao
;
Petchsasithon, Arthit
Using a novel methodology that integrates incremental dynamic analysis (IDA) and unmanned aerial vehicle positioning (POS) analysis, this study aims to assess the seismic risk of brick structures in rural China. This method can collect a lot of data and accurately anticipate seismic damage by combining UAV oblique photography with IDA analysis. Because rural China has many masonry structures, the project will design unique seismic risk mitigation strategies. High-resolution cameras on Unmanned Aerial Vehicles capture realistic photographs of rural brick buildings. The collected data is carefully examined to reveal architectural and structural elements. The project uses dynamic post-processing software from the CHC Geomatics Office to improve UAV-reference station position accuracy. This program analyzes UAV POS data disparities. The findings allow rural Chinese brick buildings to be assessed for seismic sensitivity during unexpected ground shaking occurrences. UAV tilt-photography reduces manpower and expenditures, improving inquiry efficiency. This combination improves seismic risk response. The IDA and UAV POS analysis are essential for earthquake preparedness and risk mitigation. This data-driven method informs lawmakers, urban planners, and disaster management authorities worldwide, improving earthquake engineering and catastrophe resilience programs. This work improves seismic threat assessment and masonry structure fortification, making earthquake-prone buildings safer. Thus, rural communities benefit from it.
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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.

Petchsasithon, Arthit

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