Aaltodoc Repository :: Browsing by Author "Cronhjort, Yrsa"

Browsing by Author "Cronhjort, Yrsa"

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Addiotional wooden floors to concrete element building
(2013) Nordberg, Kai; Cronhjort, Yrsa; Hirsi, Hannu; Rakennustekniikan laitos; Insinööritieteiden korkeakoulu; School of Engineering; Puttonen, Jari
The aim of this Master's thesis was to develop a wooden structure system suitable for building additional floors and to produce model solutions for this purpose. The thesis was made as a part of an international research group SmartTES by Aalto University. In this research group the aim has been to further develop the TES Energy Facade wooden renovation system and to develop a structural system for extensions in relation with TES facade renovation. Therefore a wooden based facade renovation in relation with extensions was also touched in this Master's thesis. This thesis was focused on how to realize two additional wooden floors structurally and how to integrate HVAC systems in structures in relation with extensions. The main target group was Finnish concrete element buildings from 1960'S and 70's. The characters of these original buildings cause limitations for building extensions and therefore these were studied in the beginning of the process. The structural realization of the additional floors was analysed with calculations as well as the connection to the original building. A model building was used to illustrate problems that may occur when planning extensions. The model solutions were however developed to generic solutions that would be suitable for most of the buildings in the target group. A so called worst case analysis was used in the research work to reach the generic results. By using this analysis the results and solutions formed in the planning process became universal to the other buildings as well. The characteristic structures and details specific just for extensions were studied. These kinds of details are mostly the joints and connections between the old and new building envelope and details where HVAC systems need to be integrated. In this thesis research the additional floors are suggested to be realized on a specific adjustment structure that will transfer the loads of the additional floors directly to the old concrete walls. That was used as a generic principle because usually the old roof structure cannot stand for the loads of two additional floors. Primarily the Kerto Ripa open and closed panels were studied as the adjustment structure. Comparative capacity calculations of these structures were made for different load distributions. By doing wind calculations for an extended building it was also found out that the stiffening walls in additional floors needs to be anchored to the old building. At the same time it was stated that the old concrete walls however don't need to be reinforced when installing two additional floors. The capacity of foundations was studied generally but not numerically. As a result of this thesis the generic model solutions from structural details and HVAC integrations were designed.
Archipelagic wooden buildings. Tradition and application
(2003) Cronhjort, Yrsa; Arkkitehtiosasto; Teknillinen korkeakoulu; Helsinki University of Technology; Grotenfelt, Georg
Criteria to Evaluate the Quality of Building Envelope Retrofits
(2018) Cronhjort, Yrsa; Department of Architecture
The construction industry is progressively moving from designing and building new towards redesigning, upgrading and maintaining existing buildings. Concurrently, the increasing demand for urban renewal calls for architectural interventions. Success and the meeting of set goals is typically assessed using an established framework. Architectural tradition offers methodologies to evaluate built structures based on characteristics like build quality, engineering performance, functionality, spatial design, and effects on the living environment. However, in addition to these qualities, building refurbishments target energetic, economic, environmental and social improvements. They respond to complex requirements set by an extensive network of stakeholders. A qualitative building assessment based on architecture alone does not sufficiently reflect the aims of such processes, and a holistic means to analyze refurbishment designs is lacking. This paper presents a review of existing building assessment methodologies, and suggests a new, simple set of evaluation criteria for interventions on the building envelope. The proposal is demonstrated by assessing three cases illustrating different approaches to such processes. Evaluation results prove the usability of the method to assess the variation in extent and aims of implemented measures. Coupled with quantitative estimations, it could aid the decision making process in residential housing cooperatives. Future development should include further cases and more extensive building refurbishments.
Elävä lähiö - houkutteleva asuinympäristö; Asukas- ja käyttäjälähtöinen suunnitelma Kouvolan Kaunisnurmeen
(2013) Harno, Leeni; Heikkinen, Pekka; Cronhjort, Yrsa; Arkkitehtuurin laitos; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture; Harris, Trevor
Hämeenlinnan Katuma - Puun käyttö lähiön korjauksessa
(2014) Laine, Reeta; Cronhjort, Yrsa; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture; Heikkinen, Pekka
Hämeenlinnan Katuma - Puun käyttö lähiön korjuksessa
(2014) Laine, Reeta-Maria; Cronhjort, Yrsa; Arkkitehtuurin laitos; Heikkinen, Pekka
This master's thesis is a based on a project "The opportunities of wood in suburban reconstruction", which is a collaborative project between the three faculties of architecture in Finland. The thesis is focused on the restoration of a pair of multi-story houses built in early 1980'S in Katuma, which is one of the suburbs in the town of Hämeenlinna some 100 kilometres north from Helsinki. The thesis has been divided into two parts, a theoretical part and a practical part, which introduces an example solution based on the described concept. The theoretical part studies the history of suburban housing development and prefabricated concrete construction methods. In addition, some of the challenges that aging multi-story suburbs are facing are discussed briefly. The design part describes a reconstruction and extension plan based on wooden large scale modules (TES-modules). The proposed solution enhances the energy efficiency of the buildings by adding a new layer of insulation on the facades. The functionality and accessibility of the target buildings are improved by equipping staircases with elevators and by introducing minor changes to the ground level floor plans. In addition, some minor changes are suggested in the floor plans of the apartments. The balconies of the buildings are currently in a deteriorated condition. They will be rebuilt as a part of the suggested restoration. Additionally, the design describes a concept to expand the current housing capacity by repurposing of some current common rooms on the ground floor and constructing one to two story extension out of wood based large scale modules on the top of the current structure.
Hietsu pavilion - Refurbishment of the Hietaranta beach chancing rooms into a community space
(2012) Ylönen, Ville; Cronhjort, Yrsa; Hirsi, Hannu; Arkkitehtuurin laitos; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture; Heikkinen, Pekka
This Master's thesis describes a design to renovate and rebuild an existing timber framed and unconditioned building into a year-around sports, recreation and cultural centre. The subject of this project is the old changing rooms at Hietaranta beach in Helsinki which are left without use. This study focuses on the implementation of contemporary wood construction methods on a pre-existing post and beam structure. The pavilion which holds the changing rooms was designed by city architect Gunnar Taucher in 1930 and it was later refurbished into a cafe. In its architecture the building represents a phase when the so-called "classicism of the 20's" in the Nordic countries started giving way to functionalism. In addition, the changing rooms have to do with a time in social history when cities and municipalities began improving the facilities of public beaches as leisure time was increasing among the middle class. The facility program for this design was made during a search for possible end users. Emphasis is on spatial transformability and adaptiveness which enables the functions to be offered to a broader audience than in community houses in general. The functions in the west wing of the pavilion consist of a gallery, a combined workshop and at earlier space as well as a co-working and community space. In the east end is situated a multifunctional hall which is accessed both from the foyer and from a secondary entrance on the beach side. The hall is designed to have intermittent heating which keeps it warm only during usage. A constant output heating system keeps the structures dry otherwise. The building is divided into thermal zones which have their conditions adjusted by their functions. The heating system is taken into account in architectural solutions which can affect the thermal function and moisture of structures. Figures: gross floor area 575 m², conditioned volume 1950 m³, guest headcount 500.
Käyttäjät keskiössä : lähiöuudistamisen keinot ja vaikutukset
(Aalto University, 2015) Tulamo, Tomi; Cronhjort, Yrsa; le Roux, Simon (toimittajat); Arkkitehtuurin laitos; Department of Architecture; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture
Lähellä kaupunkia - lisä- ja täydennysrakentamissuunnittelma Kouvolan Kaunisnurmeen
(2014) Lautanala, Ida; Cronhjort, Yrsa; Arkkitehtuurin laitos; Heikkinen, Pekka
This Master's thesis observes the challenges and opportunities of an urban infill development in the context of the residential area of Kaunisnurmi in Kouvola, Finland. The thesis consists of a written part and an extension and infill building plan for the southern part of Kaunisnurmi, along the Eräpolku street. The plan is based on site analysis and inhabitant participation that was implemented as a part of the thesis. The written part begins with a general look into urban consolidation in Finnish suburbs as well as an overview of issues regarding the implementation of extension and infill developments. This part also presents how inhabitant participation is used in urban infill developments. There is a review of the design principles of wooden modules and the use of them in an infill of an urban, existing environment. The plan consists of two parts: the analysis and the final plan. The analysis starts with an introduction to the Kaunisnurmi area, and it continues with presenting the methods and results of the inhabitant participation. The final plan is based on the analysis. The objective of the plan is to densify the existing urban structure and improve the accessibility of the buildings, while maintaining the valuable characteristics of the area. The plan consists of a master plan for the whole Eräpolku-area as well as a more detailed plan for an extension building on one site. The extension is designed using prefabricated wooden modules. This thesis is a part of the national User and Business Based Renovation Concept for Suburbs project (KLIKK). The main objective of this project is to develop a user-friendly industrial, overall economic and efficient renovation concept for repairing and expanding suburban apartment buildings.
Luukku-house design and construction 2009 - 2010, the Solar Decathion Europe 2010
(2010) Weckman, Ulla Inkeri; Cronhjort, Yrsa; Arkkitehtuurin laitos; Insinööritieteiden korkeakoulu; School of Engineering; Heikkinen, Pekka
The purpose of my master's thesis is to describe both the design and the building processes of a wooden zero-energy house called Luukku. The house was designed to take part in the International Solar Decathlon Europe contest. The subject of the competition is to design and build a small, comfortable and energy-efficient solar-powered house for three residents which could be produced industrially. Twenty university teams worldwide took part in the competition; as a result, the teams will build and open their houses to the public in the Centre of Madrid in June 2010. The objective of the competition is to spread knowledge of solar energy and know-how relating to sustainable building methods. The purpose of my master's thesis is to aggregate the operations, sources and methods, which were used to develop the architecture, design, integrated technologies and product selections of the Luukku-house as well as our team capacity to meet the targets of the tournament. The planning for the Luukku-house was initiated by a competition for the Students in the Wood Program in the Architecture Department. My proposal was chosen as a starting point for further development. The idea of the Luukku-house was inspired by the Finnish wooden summer cottages. The team started to analyze the threats, opportunities, strengths and weaknesses of the Luukku-house. The process continued by examining the existing constructions, as well as climatic conditions in Madrid. Our goal was set: The Luukku-house would be functioning as a zero-energy house in Finland and as a plus-energy house in Spain and it would be constructed by using wood as much as possible. In order to divide the design to different responsibilities and take turns, the team split in the Envelope-, Exterior-, Interior, and Coordination groups. At an early stage of the design, also engineering students joined to cooperate with the architectural groups. The project management team was formed of the university professors, as well as experts of energy-efficient building. The Envelope group designed as cold-bridge free a structure for the Luukku-house as possible. It consists of the interior core of laminated veneer lumber, which carries the loads of the building, as well as the outer core, consisting of wood fibber board elements. The main criteria for the element design were fast assembly during the competition, as well as dimensioning the elements for transportation in containers. In terms of material selections, the ecological alternatives were favoured. That was because also the carbon footprint of the Luukku-house was calculated during the contest. The Coordination group prepared presentations of the Luukku-house to gain sponsors to support the project either in financial terms or in the form of products. The sponsor companies that agreed to take part in the development process were promised to gain media visibility. The Luukku-house project has been presented in the newspapers and on TV, on the Radio, the internet, and various exhibition events. The energy-efficiency of the Luukku-house was improved by co-operation with the students of Energy Technology. The building was modelled with an energy-analyzing program already at the early stages of planning. By using the program, it was possible to compare the effects of different structure combinations, window- and wall areas or different shading devices in terms of improving the energy efficiency of the Luukku-house in different climates. The interior of the Luukku-house provides spaces for working, resting, washing, eating and relaxing. The Interior group designed an interior where almost all surfaces are gladded with different wood products. The building indoor air quality was improved with the students of HVAC design and the Wood laboratory. The power supply of the Luukkuhouse will be done by photo-voltaic panels on the rooftop and the domestic hot water will be heated by solar thermal collectors on the rooftop too. The interior group chose the most energy-efficient house door-household appliances and collaborated with lightning and electrical designers. The construction began in the summer of 2009. After the set-up of the core-structure, the construction focused on the interior spaces and the integration of the technical devices. The following aims are to get the Luukku-house completed in Finland before June 2010, extract it into elements and load the elements into containers to be transported to Madrid. A house-tour plan and an outdoor terrace were made for a broad range of visitors. The design and the safety matters during the set-up were to fulfil the Spanish regulations for public buildings. By examining the use of renewable forms of energy and renewable materials in the field of buildings, also the environmental matters can be better taken care of. Whereas nowadays it is energy-consuming to live in a house, in the future the house itself could produce all the energy needed for living. Architecture plays a key-role in the development. Who would want to live in a house that feels like a power-station instead of a home? Participation in the international competition has helped to develop new ideas, as many examples of plus-energy houses do not yet exist. Construction Footprint: 71, 2 m2. The Roof Angle: 13 degrees. Gross Internal Area: 42, 4 m2. Rooftop Solar Panel Area: 59 m2. Amount of Inhabitants: 3. Rooftop Solar Collector Area: 4 m2. Scope of the Building 112 m3. Renewable construction materials 83 %.
Smart TES Innovation in timber construction for the modernization of the building envelope. Project report 26.06.2011
(Aalto University, 2012) Cronhjort, Yrsa; Junnonen, Juha-Matti; Kajander, Juho-Kusti; Kolehmainen, Markku; le Roux, Simon; Lylykangas, Kimmo; Päätalo, Juha; Sivunen, Matti; Tulamo, Tomi; Arkkitehtuurin laitos; Department of Architecture; Taiteiden ja suunnittelun korkeakoulu; School of Arts, Design and Architecture
Standard Timber Structures for Lean Architectural Design
(2017) Cronhjort, Yrsa; Department of Architecture
The Finnish building stock is our most significant national asset and the construction industry an important source of income. By managing building production we affect the performance of this activity. Development is required for timber-building to compete in this market. Lean culture is one approach to optimized production. Lean construction research has defined lean and industrialized processes, identified the differences between mass-customization and mass-production, and the importance of standardization. Redesign is a recognized cause of inefficiency, typical also for complex timber buildings. Development visions include building system based design automation and modularization. This study explores pre-designed details as a means to reduce work in planning processes. The article bases on a comparative case study. Six collections of pre-designed details developed for building with timber are presented and compared regarding availability, formats, accessible material and structures. Usability in practice is assessed with one selected intermediate floor structure as a benchmark. Conclusions are that barriers exist for transnational use, in referencing systems and for the direct use of proposed details and structures in a CAD-environment. The amount of material varies greatly. However, the collections successfully act as an overview of solutions compatible with local building regulations, and the similarity of solutions offers an opportunity for European wide competition and implementation. Research leading to these results is part of the transnational WoodWisdom-Net Research Programme, project Innovative lean processes and cooperation models for planning, production and maintenance of urban timber buildings, leanWOOD.

Browsing by Author "Cronhjort, Yrsa"

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