Generative design methods are able to produce a large number of potential solutions of architectural floor plans, which may be overwhelming for the decision-maker to cope with. Therefore, it is important to develop tools which organise the generated data in a meaningful manner. In this study, a comparative analysis of four architectural shape representations for the task of
Abstract. The present study, based on a comparative analysis of several plans for Lisbon's Baixa district, with an emphasis on that area's public space, contributes to an understanding of the urban design process and presents a fresh perspective on dealing with historical data by conducting a posteriori analysis using mathematical tools to uncover relations in the historical data. The nine plans used were quantified and evaluated in a comparative manner. While CAD was used to quantify the urban morphology of the different plans, comparative tables make it possible to register the data, which was further evaluated through two interrelated processes: mathematical analysis and the urban analysis. The results show the existence of power law relations for the areas of each of the city's different elements (e.g., blocks, churches, largos and adros). We discuss how this contributes to the understanding of the plans' elements.
Abstract:The different options for the reconstruction of the city of Lisbon in the aftermath of the 1755 earthquake are studied with an agent-based model based on randomwalks. This method gives a comparative quantitative measure of mobility of the circulation spaces within the city. The plans proposed for the city of Lisbon signified a departure from the medieval mobility city model. The intricacy of the old city circulation spaces is greatly reduced in the new plans and the mobility between different areas is substantially improved. The simulation results of the random-walk model show that those plans keeping the main force lines of the old city presented less improvement in terms of mobility. The plans that had greater design freedom were, by contrast, easier to navigate. Lisbon's reconstruction followed a plan that included a shift in the traditional notions of mobility. This affected the daily lives of its citizens by potentiating an easy access to the waterfront, simplifying orientation and navigability. Using the random-walk model it is shown how to quantitatively measure the potential that synthetic plans have in terms of the permeability and navigability of different city public spaces.
Cities have been affected, throughout History, by earthquakes, big fires, epidemics, and pandemics that sparked moments of reflection and change in the city form and public space quantity and quality. For example, this happened after the Great Fire of London (1666) or the Great Earthquake of Lisbon (1755). After episodes of destruction or disruption, debates and projects forge the urban answer to diminish future losses and risks. From this starting point, we discuss the impact of two distinct public health crisis -the epidemics of the 19th century and the current COVID-19 pandemic -on Lisbon's public spaces. For both periods, we analyze primary sources -strategies, plans, projects, and papers -designed by Lisbon City Council and that depict the ideas and tactics to tackle the urban challenges imposed by the public health crises. With this research, we discuss the impact of public health crises on public spaces policies design through two particular examples in Lisbon, from the 19th century and the current days. Furthermore, we question if these crises served, to any extent, the intentions to qualify public places and introduce a new form and image on Lisbon public spaces. THE SANITARIAN CRISIS AND THE TRANSFORMATION OF THE PUBLIC URBAN SPACEEpidemics cause radical changes in people's lives. They follow each other with more or less impact, changing the behavior of the individuals subject to them. Observing the main epidemics that have occurred since the 19th century and the deaths resulting from them, it is important to highlight the effects of the Cholera outbreak and Yellow Fever (1856-1857), HIV / AIDS (1981) and, recently, the COVID-19 (2019) Pandemic.The high density of inhabitants and activities in a limited space represents one of the main challenges for urban areas that are affected by viruses. During the early stages of the of the Covid-19 spread in Europe, several implications for urban planning were noted. Data on the spread of this pandemic shows that urban areas are significantly affected by Covid-19 (90% of cases were identified in urban areas) [1]. In Portugal there are records that show that: "the diffusion process started in the densest urban areas, followed by the frontier areas and, later, spreading to the territories of lesser demographic density and higher age" [2].As during the mid-nineteenth century, in the coming decades we will see an increase in urban centers: "for example, major urban centers such as Wuhan and Paris are shooting upward of 11 million dwellers. By 2050 there are projected to be 43 such megacities, and more than two-thirds of the global population could be living in urban areas." [3](p. 317). The people's choice to live in large urban centers has harmful consequences when epidemics occur. Housing density is virus-friendly. However, having more people in less space does not necessarily mean more risk. The transmission of epidemics thus occurs more intensely in urban spaces, because they are normally dependent on trade routes [4]. Added to the problem of population density is...
“In behavioral science, frugality has been defined as the tendency to acquire goods and services in a contained manner, and use of the economic goods, resources and services themselves, to achieve a long-term goal” [1] The present project intends to study the introduction of the concept of territorial frugality, characterizing its applicability to the territory, specifically to the urban space, as a tool in the parsimonious use of available resources, as well as studying its measurement through a mixed methodology. An interventionist, either using the opinion of a group of experts, using the DELPHI technique, as well as the establishment of conceptual models or using other methods in order to identify, select and define the applicability of indicators that allow the evaluation or establishment of parameters correlated with the concept of frugality, within the scope of spatial planning and urbanism, within the case of Lisbon Metropolitan Area.
The religious spaces are carriers of great symbolic importance, standing out in the urban fabric not only for their location, but also for their scale in relation to the surrounding buildings. We show the relevance of the religious space in the São Miguel island (Azores) urban fabric, where the church presents itself as an element of great importance. It is the generator of the urban fabric, and it is usually strategically located as a landmark of the civic centre of the localities. This study presents an analysis of the main façades of the parish churches of the island of S. Miguel built during the eighteenth and nineteenth centuries. It highlights the existence of a typology of façade, which is a consequence of the materials and building systems existing there at the time. This demonstration continues the studies carried out by Sousa (1986) with the concept of façade “micaelense baroque ornamentation” and Caldas (2012) with the concept of “micaelense baroque façade” and “micaelense type façade”. Methodologically, the investigation was carried out through the analysis of the elements that make up the façades of the parish churches, the study of old and current photography, and drawings made in CAD; and the systematization of façades by grouping them into categories and establishing a typology between the various churches of the eighteenth and nineteenth centuries.
Abstract. This investigation shows the European influence on the work of Portuguese architects of the Enlightenment period. Based on previous studies we focus our attention on the design of "Praça do Comércio" square and on a hypothesis, that it was based on the French Royal Square. We demonstrate that the design of Lisbon from the second half of the eighteenth-century was influenced by the theories and best practices of the time. We also confirm that the architect Eugénio dos Santos e Carvalho, a member of the reconstruction team for the Baixa, had in his personal library several reference books of French architectural practice that certainly influenced his architecture. The plans for the main square of Lisbon's lower city, "Praça do Comércio", can be compared to the "Place de Nos Conquêtes", predecessor of the "Place Vêndome", in its design, architecture and dimensions. This research analysed the cartography and iconography of Lisbon's reconstruction. In particular, the drawings of "Praça do Comércio" and "Place de nos Conquêtes" were exhaustively studied. The comparative study of the elements for both squares lead to the conclusion that the Portuguese square presents many aspects of the French Age of Enlightenment, and in particular those featured in the "Place de nos Conquêtes". This paper concludes that the Portuguese urban design and architectural projects of the 18th century are the result of previous knowledge where it was always possible to articulate the vernacular with academic design, and where many different influences left their mark on the culture of the period. The plans for the lower part of Lisbon display a mixture of references that relate to architectural and urban planning traditions of the Portuguese military engineering and contemporary French urban planning.
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