Design Parameters and Fluid Interaction of Amphibious Structures (original) (raw)
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Flood Mitigation Measures -Design of an Amphibious House
Natural disasters have caused a lot of damage and destruction throughout the world. A major natural catastrophe among all the disasters is flooding. Flooding is very common in India as India is one of the most flood-prone countries in the world with almost 30 million Indians getting affected on an average annually. India's average economic losses due to natural calamities are estimated at INR 746.83 billion, of which over INR 532.94 billion are attributed to floods. Along with financial and real-estate losses, it also causes emotional damage to people. To minimize these losses, we thought of different Flood mitigation measures and chose to further work on Amphibious housing. Amphibious houses are the structures that majorly work on two principles i.e. Archimedes Principle and Pontoon principle. So, these houses act like normal houses but when a flood occurs, it rises to the height of flood level and floats with the help of pontoons or hollow basements. It is supported by the vertical mooring poles to avoid displacement due to external forces. Once the floodwater is drained off, the house comes back at rest to the ground level. For making the houses float, the foundation or the sub-structure is made up of Expanded Polystyrene Foam (EPS) blocks. While the superstructure can be made using different materials like timber, EPS blocks, lightweight concrete, Ferro cement, etc.
A Review on Flood Mitigation Measures Amphibious Housing
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
Floods leads to loss of lives as well as infrastructure which affects the economy of the area for a longer duration, hence to cater the current scenario, an attempt to design a viable structure is the need of future. The aim of this paper is to study new concept of the amphibious house in lowland area as a flood mitigation measure. This report will explore and documents the various ways of protecting and creating a sustainable living environment for seaside and riverside residents. The solution will also include waterproof material and protection of vital utilities, design of buoyant foundation, vertical guidance pole attached to the foundation, which provides resistance from lateral force caused by wind and water. Amphibious Architecture adapts to dry and wet conditions without causing any damage during or after flood. The development of an amphibious community is a long time strategy that will minimize the potential risk of flooding along riverside. The proposal for this dissertation will provide sustainable structure for the people of India to create amphibious structures protected from floods.
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences, 2018
The concept of amphibious houses has a broad range of application as a sustainable and multi-reason solution for flood protection. Based on the current materials and methods for implementation of the amphibious house, an optimal morphology is required to be achieved. Different morphologies for the buoyant component should be evaluated under four classifications towards sustainable development. This study evaluated the best design and material for floating part in amphibious houses based on technological, environmental, economic, and social classifications. This study applied the multi attribute decision making model using relevant criteria for applying amphibious house as a flood protection strategy in floodplain areas in South-East Asia. The bucket system (pontoons) which is made by lightweight concrete and using expanded polystyrene block inside is identified as an applicable morphology for buoyant part in amphibious houses.
A Prescriptive Criterion for Amphibious Foundation Design
2020
Flooding is the most frequently occurring natural disaster in the United States and worldwide (FEMA, 2004). Each year, when major flooding ravishes communities, residents are put in danger and often displaced from their homes and jobs for several weeks or months, if not more. The use of amphibious structures as a flood risk mitigation technique has currently only been implemented in individual or small-scale development. Information on the structural design of such buildings is limited and most of the current knowledge regarding amphibious structures is presented in architectural applications. The primary objective of this research is to develop a prescriptive approach to the structural design of a dual-foundation system for an amphibious structure which will float under flooded conditions. The research and example design problem presented herein provide a prescriptive criterion outlining how to simultaneously achieve a buoyant condition and structural stability, which restricts mov...
Amphibious Structure Design for Kuttanad
IRJET, 2022
Over these years, the World has endured large number of natural disasters. Among them the most disastrous one is flood. Flood can cause a potential threat to both life and property. The influence of global warming is one of the major causes that appear to worry the World, especially the effects of flooding happening at the riverside that causes potential loses. It is difficult to live against water, but it is possible to live with water level rising. The mean sea level increases all over the world due to Global Warming. The rising water level occupies the land surface. The land surface will be taken away by the rising water. The only way to live with rising water is by constructing houses on the water. So this paper focuses on amphibious structures that can be used as storage units and car porch. Kuttanad is a region in Kerala which always undergoes the problem of flooding. Every year the people in Kuttanad are facing floods and suffering the after effects. Amphibious structures are much preferable in regions like Kuttanad. From the survey conducted in Kuttanad region, it was found out that amphibious structures are mostly needed in this region. Design of an amphibious structure and its load analysis for proposed amphibious structure is being discussed here. Load analysis of the amphibious structure can be done using STAAD pro V8i. Software's such as AUTO CADD, Sketch up was used for 3D Modelling.
Thriving with water: Developments in amphibious architecture in North America
2017
There is increasing awareness worldwide that traditional flood-mitigation strategies that attempt to control the flow of water only increase the likelihood of catastrophic consequences in the long run, when failure inevitably occurs after years of complacency and development behind flood barriers. Amphibious architecture is a non-defensive flood mitigation and climate change adaptation strategy that works in synchrony with a floodprone region’s natural cycles of flooding, allowing water to flow rather than creating an obstruction. Since the height to which an amphibious building rises is not necessarily fixed but adapts to the variable depth of flood water, amphibiation can accommodate rising sea levels and land subsidence as well. Amphibious retrofitting can provide measurable cost savings compared to other flood mitigation strategies, performing well in loss avoidance studies for both flood and wind damage. An amphibious approach to planning and construction recognizes the beneficial aspects of seasonal and occasional flooding, allowing us not merely to live with water, but to thrive with it. This paper reviews case studies of both existing and proposed amphibious buildings, with discussion of their systems and components. It also discusses the limitations of amphibious construction, some of the regulatory obstacles that have discouraged its development, and possible paths forward. The first International Conference on Amphibious Architecture, Design and Engineering, ICAADE 2015, was held in Bangkok, Thailand, in August 2015. The second, ICAADE 2017, will convene at the University of Waterloo in Canada in June 2017.
2015
As global climate change causes sea levels to rise and weather events to become increasingly extreme, the occurrence of severe floods and hurricanes will become more common around the world. Many discussions and policies are being implemented to increase resilience to future weather-related disasters. However, while many of these initiatives are intended to mitigate extreme flood events, they do not fully consider less severe but more commonly occurring wind-induced damage. In accordance with regulations issued by FEMA, houses are commonly raised on stilts in an effort to increase resilience to flooding. However, drastic elevation increases the structure’s vulnerability to wind. In effect, by protecting against a rare but catastrophic occurrence, houses are made considerably more vulnerable to less severe but more regularly occurring events with potential to cause wind damage. Amphibious construction provides an alternative solution to mitigating hurricane damage, as this strategy i...
2023
The Philippines, a country belonging in the Pacific Ring of Fire, experiences many natural disasters frequently. These natural disasters include typhoons, volcano eruptions, heavy flooding and very high seismic activity which inflicts massive amounts of damage on the country’s socio-economic, environmental, and most importantly, infrastructural aspects. The recent typhoon Ulysses alone, which made landfall in the country last November 8, 2020, has dealt an approximate of 20.8 billion pesos in infrastructural damages. In Provident Village in Marikina City, flood depths rose to 6 meters in the height of typhoon Ulysses causing damage to properties such as houses and cars as well as thousands of people being displaced. In this study, the goal was to design an amphibious residential building based on the hazard parameters of this village, which mitigates inundations caused by intense rains brought by typhoons, as well as the lateral forces acting on a structure due to massive earthquakes and heavy-blowing winds. This proposed house design comprises of the Diagrid structural system, a very efficient frame that resists the said lateral forces and the buoyant foundation system which enables flotation of the whole house, mitigating most, if not all the flood damages. To achieve this goal, the researchers compared the two primary diagrid framing configurations that can be applied on a house, chevron, and cross configurations with 15 height samples each in terms of structural performance criteria: lateral stiffness, drift, and displacement, to determine the framing type for the proposed design. In the end, the cross frame is not only better but is also more efficient than the chevron frame by an average of 74% less frame displacement, and so was chosen to be the primary frame in the proposed design. As for the evaluation of flood mitigation, the researchers determined the flood depth data from various locations near the village and found out that the proposed design was cost-effective in some locations, while also not in some locations. Flood depth largely affects how cost-effectiveness of the buoyant foundation system is evaluated, with higher flood depths up to 4 meters, leading to larger Loss Avoidance Ratios (LAR), wherein an LAR greater than 1.00 is considered to be cost-effective.
Buoyancy and Stability Analysis of Ark’a Modulam Amphibious Foundation Model
Journal of Infrastructure & Facility Asset Management, 2020
To solve problems of settlement in floodplain areas, research on the anti-flood foundation model is crucial. The anti-flood foundation model should be able to float during floods and to remain on land during non-flood conditions. This research focused on an amphibious foundation model named Ark'a Modulam. The reliability of Ark'a Modulam floating construction was analyzed for buoyancy and stability against vertical and horizontal loads. Two floating constructions were designed based on knockdown and rigid systems. Both systems were designed using iron pipes with 2.5" and 4" of diameter. No significant differences were found in the buoyancy forces of the 2 floating construction systems. The load that can be supported by 1 floating construction was a maximum of 0.954 ton and stable at a floating depth limit of 43.2 cm. The stability of the floating construction should include the effect of vertical drive piles. The vertical and horizontal loads acting on the construction positioned inside Kahayan River during an extreme flood were also analyzed. During an extreme flood with 100 years of the return period, the construction of one vertical drive piles should able to support vertical forces equal to or larger than 7.50 ton
Implementation of Floating Building for the Areas with the Rising Sea Level Problems
International Journal for Research in Applied Science and Engineering Technology, 2021
For quite a long time, the coastline has been the concentration for assortment of exercises including enterprises, farming, amusement and fisheries. All the significant urban communities in India have created along the coastline. Over the previous hundreds of years, the water level expanded almost eight crawls in the water front region and the researchers propose a steady expansion in water level because of climatic change. There are two main considerations for water level ascent, liquefying of ice sheets and warm development of water. These variables are the aftereffect of an Earth-wide temperature boost which can't be changed without any problem. The water level ascent will have different effects like moving from seaside zones, regular flooding, dissolve water shores; the net outcome will be movement from this thickly populated zones. India is a peninsular country three sides covered with water. It faces a hefty rainstorm season that causes enormous scope obliteration all through the country. Enduring waterways like Ganga, Brahmaputra, and so forth consistently causes flooding in north India and typhoons and substantial rainstorm are the purpose behind flood in southern pieces of India. India is the one of the weak country for climatic change. It should attempt to give flood confirmation, protected and moderate designs for all residents. This report will investigate and records the different methods of securing and establishing a reasonable living climate for coastline and costal inhabitants. This will record the projection water level ascent and in change in environment will expand the frequencies of flood. This exposition will address the inquiries like "How could a construction sits in ground can get by during floods?" The methods to give low flood occupants Amphibious lodging working both in land and water. Amphibious Architecture is financially savvy and safe option for perpetual static height and it is accomplished by light establishments.