Considering the seismic behaviour of cultural heritage buildings, recent earthquakes have emphasised the high vulnerability of vaulted structures. In this regard, the present thesis deals with masonry cross vaults, among the most diffused and fascinating structural typologies of the European cultural heritage. After a thorough review of cross vault historical developments, the focus is shifted to the shaking table tests of a scaled arch. These two points provided valuable information to calibrate the finite element model of cross vault, discussed next. Finally, the influence of the main geometrical and mechanical parameters on the seismic capacity of cross vaults are examined by means of a sensitivity analysis.
Existing structures represent a heterogeneous category in the global built environment as often characterized by the presence of archaic materials, damage and disconnections, uncommon construction techniques and subsequent interventions throughout the building history. In this scenario, the common linear elastic analysis approach adopted for new buildings is incapable of an accurate estimation of structural capacity, leading to overconservative results, invasive structural strengthening, added intervention costs, excessive interference to building users and possible losses in terms of aesthetics or heritage values. For a rational and sustainable use of the resources, this book deals with advanced numerical simulations, adopting a practical approach to introduce the fundamentals of Finite Element Method, nonlinear solution procedures and constitutive material models. Recommended material properties for masonry, timber, reinforced concrete, iron and steel are discussed according to experimental evidence, building standards and codes of practice. The examples examined throughout the book and in the conclusive chapter support the analyst’s decision-making process toward a safe and efficient use of finite element analysis. Written primarily for practicing engineers, the book is of value to students in engineering and technical architecture with solid knowledge in the field of continuum mechanics and structural design.
Conservation in the built environment raises fundamental questions which have been debated for centuries - what is worth preserving, how is it possible, why is it important? This book takes a modern approach to the meaning of a heritage structure and its conservation. The historical evolution of conservation is briefly addressed, considering prominent individuals and cases; along with the history of construction, focusing on materials and related structural elements, with insight on the sizing rules adopted by masons. This explains structural decisions made during the construction process and allows comparison of scientific theories from the 18th century to modern understanding of limit analysis. Damage and collapse mechanisms for masonry construction, as the most widespread structural form for historical buildings, is described. Excess permanent loading and settlement is differentiated from environmental and anthropogenic actions such as earthquake or incorrect intervention. The team of authors brings together unique expertise, with high level research and leading practice with archetypical cases from around the world. The book addresses the history of conservation by exploring materials and structures and the history of construction and damage, so it is of value to students and professionals in civil engineering and architecture, as well as archaeologists and art historians.
The present book introduces an original (new) perspective on Cuba. This book revisits Cuba's choice, after the 1959 revolution, to develop an advanced healthcare and scientific system. It also introduces new aspects of the problem development/underdevelopment. From the start, every effort of the Cuban leadership and scientific community was driven by the primary purpose of meeting the country’s basic economic and social needs. Immediate key measures taken after the revolution included free education up to higher levels and free health services. In only a couple of decades Third World diseases were defeated and a First World health profile was achieved. In the sciences, support and collaboration was sought and welcomed from both Soviet and western countries. Moreover, due to the backward position of the Soviet Union in genetics and molecular biology, in the early 1970s Cuban scientists were trained in these fields mainly by Italian biologists. In the following decade, initially relying on contacts with American and Finnish specialists, Cuban biologists and physicians built a large industrial biotechnology complex to produce and commercialize Cuban-made, and often invented, medicines and vaccines. In the early 1990s the sudden collapse of the Soviet Union and the socialist market created an unprecedented challenge. Yet Cuba’s scientific system substantially resiled, despite unavoidable setbacks. This crisis was faced by confirming and reinforcing government support for biotechnology, with the result that today Cuba excels at a global level in the typical capital-intensive field of biotechnology. While this book is especially devoted to historians of science and technology and to biotechnologists, it is of interest to the general public.
Conservation in the built environment raises fundamental questions which have been debated for centuries - what is worth preserving, how is it possible, why is it important? This book takes a modern approach to the meaning of a heritage structure and its conservation. The historical evolution of conservation is briefly addressed, considering prominent individuals and cases; along with the history of construction, focusing on materials and related structural elements, with insight on the sizing rules adopted by masons. This explains structural decisions made during the construction process and allows comparison of scientific theories from the 18th century to modern understanding of limit analysis. Damage and collapse mechanisms for masonry construction, as the most widespread structural form for historical buildings, is described. Excess permanent loading and settlement is differentiated from environmental and anthropogenic actions such as earthquake or incorrect intervention. The team of authors brings together unique expertise, with high level research and leading practice with archetypical cases from around the world. The book addresses the history of conservation by exploring materials and structures and the history of construction and damage, so it is of value to students and professionals in civil engineering and architecture, as well as archaeologists and art historians.
Existing structures represent a heterogeneous category in the global built environment as often characterized by the presence of archaic materials, damage and disconnections, uncommon construction techniques and subsequent interventions throughout the building history. In this scenario, the common linear elastic analysis approach adopted for new buildings is incapable of an accurate estimation of structural capacity, leading to overconservative results, invasive structural strengthening, added intervention costs, excessive interference to building users and possible losses in terms of aesthetics or heritage values. For a rational and sustainable use of the resources, this book deals with advanced numerical simulations, adopting a practical approach to introduce the fundamentals of Finite Element Method, nonlinear solution procedures and constitutive material models. Recommended material properties for masonry, timber, reinforced concrete, iron and steel are discussed according to experimental evidence, building standards and codes of practice. The examples examined throughout the book and in the conclusive chapter support the analyst’s decision-making process toward a safe and efficient use of finite element analysis. Written primarily for practicing engineers, the book is of value to students in engineering and technical architecture with solid knowledge in the field of continuum mechanics and structural design.
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