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The environmental imagination : technics and poetics of the architectural environment
\"The Environmental Imagination explores the relationship between tectonics and poetics in environmental design in architecture. Working thematically and chronologically from the eighteenth century to the present day, this book redefines the historiography of environmental design by looking beyond conventional histories to argue that the environments within buildings are a collaboration between poetic intentions and technical means. In a sequence of essays, the book traces a line through works by leading architects of the nineteenth and twentieth centuries that illustrate the impact of new technologies on the conception and realisation of environments in buildings. In this, a consideration of the qualitative dimension of environment is added to the primarily technological narratives of other accounts. In this second edition, the book has been substantially rewritten and restructured to include further research conducted in the decade since the first edition. A number of important buildings have been revisited, in order to extend the descriptions of their environments, and studies have been made of a number of newly studied, significant buildings. A completely new essay offers an environmental interpretation of Luis Barrâagan's magical own house in Mexico City and the earlier studies of buildings by Peter Zumthor have been gathered into a single, extended essay that includes a body of new research. On the fiftieth anniversary of the publication of Reyner Banham's, The Architecture of the Well-tempered Environment, the book concludes with a critical tribute to that seminal text. The Environmental Imagination will appeal to academics and practitioners with interests in the history, theory and technology of architecture\"-- Provided by publisher.
Book
Fault Lines
Earth's fractured geology is visible in its fault lines. It is along these lines that earthquakes occur, sometimes with disastrous effects. These disturbances can significantly influence urban development, as seen in the aftermath of two earthquakes in Messina, Italy, in 1908 and in the Belice Valley, Sicily, in 1968. Following the history of these places before and after their destruction, this book explores plans and developments that preceded the disasters and the urbanism that emerged from the ruins. These stories explore fault lines between \"rural\" and \"urban,\" \"backwardness\" and \"development,\" and \"before\" and \"after,\" shedding light on the role of environmental forces in the history of human habitats.
eBook
Modernism's visible hand : architecture and regulation in America
\"Drawing on a range of previously unexplored archival resources, Michael Osman examines the increasing role of environmental technologies in building design from the late nineteenth century-- from cold storage and scientific laboratories to factories. Osman broadens our conception of how industrial capitalism shaped the built environment as well as the role of design in dealing with ecological crises today\"-- Provided by publisher.
Book
Reconstruction process of damaged residential buildings outside historical centres after the L’Aquila earthquake: part I—\light damage\ reconstruction
Assessment of the seismic damage and usability of the building stock started a few days after the L’Aquila earthquake in order to evaluate the safety conditions of the buildings concerned. Several ordinances of the Prime Minister were issued to regulate the reconstruction process. In particular, based also on damage level, the procedures for repair, strengthening or demolition/reconstruction of residential buildings were established with the definition of relevant state funding. For each damaged building, practitioners engaged by property owners designed repair and strengthening interventions and then computed the corresponding costs. These projects were the technical basis for funding applications that owners submitted to the government. Technical and financial information collected during the approval procedure of such applications allowed compilation of a database regarding 5775 residential buildings damaged by the L’Aquila earthquake. The present study examines the restoration policy and the procedures regulating the reconstruction process of residential property outside city centres. In particular, the data related to the first phase of the reconstruction process (the so-called “light damage” reconstruction) to recover the usability of slightly damaged buildings are illustrated. The discussion focuses on the time-to-approval of funding applications and on the public contributions granted for repair and local strengthening works.
Journal Article
A nonlinear computational model for regional seismic simulation of tall buildings
To better predict the responses of tall buildings in regional seismic simulation, a nonlinear multiple degree-of-freedom (MDOF) flexural-shear (NMFS) model and its associated parameter calibration method are proposed. The model has such advantages as (1) representation of the nonlinear flexural-shear deformation mode of tall buildings, (2) a high computational efficiency, (3) convenient parameter calibration, and (4) the ability to output the inter-story drift of each story. The characteristics of the nonlinear lateral flexural-shear deformation mode of tall buildings are appropriately considered in the NMFS model. The accuracy of the inter-story drift prediction is far superior to the traditional nonlinear MDOF shear (NMS) model. The computing efficiency is also remarkably improved and the speed-up ratio is greater than 30,000 by comparing to the corresponding refined finite element (FE) model. The parameters of the building models can be conveniently and efficiently calibrated using the widely accessible building attribute data from GIS. More specifically, only the descriptive information (i.e., structural height, year of construction, site condition and structural type) of each building is required to perform such calibration. Two representative tall buildings and a residential area with tall buildings are selected to demonstrate the implementation and advantages of the proposed NMFS model. Outcomes of this work are expected to provide a useful reference for future work on regional seismic loss estimations of tall buildings.
Journal Article
Numerical simulation of potential seismic pounding among adjacent buildings in series
Numerous urban seismic vulnerability studies have recognized pounding between adjacent structures as one of the main risks for neighbouring buildings due to the restricted separation distance. The seismic pounding could produce damages that range from slight non-structural to serious structural damage that could even head to a total collapse of buildings. Therefore, an assessment of the seismic pounding risk of buildings is indispensable in future calibration of seismic design code provisions. Thus, this study targets to draw useful recommendations for seismic design through the evaluation of the pounding effects on adjacent buildings. A numerical simulation is formulated to estimate the pounding effects on the seismic response demands of three adjacent buildings in series with different alignment configurations. Three adjacent buildings of 3-storey, 6-storey and 12-storey MRF buildings are combined together to produce three different alignment configurations; these configurations of adjacent buildings are subjected to nine ground motions that are absolutely compatible with the design spectrum. The nonlinear time-history is performed for the evaluation of the response demands of different alignment configurations of the adjacent buildings using structural analysis software ETABS. Various response parameters are investigated such as displacement, acceleration, storey shear force mean and maximum responses, impact force and hysteretic behaviour. Based on the obtained results, it has been concluded that the severity of the seismic pounding effects depends on the vibration characteristic of the adjacent buildings, the input excitation characteristic and whether the building has interior or exterior alignment position, thus either exposed to one or two-sided impacts. Seismic pounding among adjacent buildings induces greater shear force and acceleration response demands at different story levels for the high rise building, while the response could be reduced in the short buildings compared to that of no-pounding case. The effect of poundings of adjacent buildings seems to be critical for most of the cases and, therefore, the structural pounding phenomenon is rather detrimental than beneficial.
Journal Article
Seismic analysis of failure mechanisms in adjacent interacting stone masonry buildings via rigid block modeling
Groups of contiguous unreinforced stone masonry buildings are a common type of housing seen in old European downtowns. However, assessing their response to earthquakes poses several challenges to the analysts, especially when the housing units are laid out in compact configurations. In fact, in those circumstances a modeling technique that allows for the dynamic interaction of the units is required. The numerical study carried out in this paper makes use of a rigid block modeling approach implemented into in-house software tools to simulate the static behavior and dynamic response of an aggregate stone masonry building. Said approach is used to reproduce the results of bi-axial shake-table tests that were performed on a building prototype as part of the activities organized within the Adjacent Interacting Masonry Structures project, sponsored by the Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe. The experimental mock-up consisted of two adjacent interacting units with matching layout but different height. Two rigid block models are used to investigate the seismic response of the mock-up: a 3D model allowing for the limit analysis of the building on one hand, and a 2D model allowing for the non-linear static pushover and time-history analysis on the other. The 3D model was built for the blind prediction of the test results, as part of a competition organized to test different modeling approaches that are nowadays available to the analysts. The 2D model was implemented once the experimental data were made available, to deepen the investigation by non-linear static pushover and time-history analysis. In both models, the stonework is idealized into an assemblage of rigid blocks interacting via no-tension frictional interfaces, and mathematical programming is utilized to solve the optimization problems associated to the different types of analysis. Differences between numerical and experimental failure mechanisms, base shears, peak ground accelerations, and displacement histories are discussed. Potentialities and limitations of the adopted rigid block models for limit, pushover and time-history analyses are pointed out on the basis of their comparisons with the experimental results.
Journal Article
Seismic performance of retrofitted and non-retrofitted RC school buildings after the February 6th, 2023, Kahramanmaraş earthquakes
On February 6, 2023, two significant earthquakes struck Pazarcık and Elbistan/Kahramanmaraş with magnitudes of 7.7 and 7.6, respectively. These earthquakes are considered the most devastating disaster in Turkey in the last century. According to official records, these earthquakes affected 11 provinces, resulting in the loss of more than 50,000 lives. Additionally, numerous buildings collapsed or became unusable due to the impact of the earthquakes and the schools constitute an important part of these structures. The schools are important facilities that need to be functional and safe following an earthquake. This study contains both post-earthquake field observations and numerical studies for the retrofitted and non-retrofitted schools. It investigates the retrofitted and non-retrofitted conditions of a total of 7 blocks, which consist of 4 different schools located in Kahramanmaraş. It is observed that the retrofitted school buildings weren’t damaged after these earthquakes. The numerical models underwent nonlinear time history analyses using the ETABS program. The ground accelerations used in the analyses were obtained from the nearest station to the school buildings. The analyses yielded several results, including the natural periods, story displacements, story drifts, and seismic energy inputs of the structures. These results were then compared with the field observations to assess their accuracy and validity. With the retrofit application, story displacements, the interstory drifts and seismic energy input have decreased. Both field studies and numerical analyses have shown that even school buildings with insufficient material and engineering services can become resistant to major earthquakes with an appropriate retrofit method.
Journal Article
Risky Cities
Over half the world’s population lives in urban regions, and increasingly disasters are of great concern to city dwellers, policymakers, and builders. However, disaster risk is also of great interest to corporations, financiers, and investors. Risky Cities is a critical examination of global urban development, capitalism, and its relationship with environmental hazards. It is about how cities live and profit from the threat of sinkholes, garbage, and fire. Risky Cities is not simply about post-catastrophe profiteering. This book focuses on the way in which disaster capitalism has figured out ways to commodify environmental bads and manage risks. Notably, capitalist city-building results in the physical transformation of nature. This necessitates risk management strategies –such as insurance, environmental assessments, and technocratic mitigation plans. As such capitalists redistribute risk relying on short-term fixes to disaster risk rather than address long-term vulnerabilities.
eBook
Investigation of RC structure damages after February 6, 2023, Kahramanmaraş earthquake in the Hatay region
From a tectonic perspective, Türkiye is a geographical region known for its high seismic activity, with some of the most active faults in the world. On February 6, 2023, two consecutive earthquakes with magnitudes of Mw 7.7 and Mw 7.6 struck Kahramanmaraş within a remarkably short time span of 9 h. This event stands out as a rare and unprecedented tectonic occurrence in terms of seismicity and tectonic activity over the past 100 years. The impact of these two major earthquakes on the region's reinforced concrete structures was significant, resulting in severe damage and the collapse of numerous buildings. It is of utmost importance to investigate and examine the design flaws and underlying factors that contributed to the damage observed in the reinforced concrete structures affected by these earthquakes. Such research will not only contribute to the improvement of structural design, seismic regulations, and quality control measures during construction but also enhance our understanding of earthquake engineering. In this study, an in-depth field investigation was conducted on reinforced concrete structures in Hatay, one of the regions most affected by the Kahramanmaraş earthquakes. The damages occurring in the buildings were documented through a detailed field survey and analyzed. A total of 540 reinforced concrete structures in the Hatay region were extensively examined, and the damages that occurred in these structures were photographed and interpreted to understand their underlying causes. Subsequently, based on the findings from the field investigation, a structural model was designed that incorporated the most significant design and construction errors responsible for the damages observed in the 540 examined structures. The devised model was subjected to static push-over analysis and nonlinear dynamic analysis using the SAP2000 finite element software, and the results obtained were interpreted.
Journal Article