1,720,999 research outputs found
Morphogenesis and Structural Optimizationof Shell Structures with the Aid ofa Genetic Algorithm
No full textThe paper presents a method to generate and structurally optimize the shape of free form shells by means of a genetic algorithm. The shape of the shell is described with the aid of a NURBS representation and the algorithm modifies and improves it on the basis of the structural behaviour. A FEM analysis is performed for each individual and at each generation of the evolutionary process, in order to evaluate the structural behaviour in terms of maximum vertical displacement under a distributed load condition. The method is applied to a recent example of free-form architecture and the results are discussed referring in particular to the role of the architect as 'decision maker' in the evolutionary process. From this point of view the necessity to fit different requirements, structural, functional, aesthetic, involving the work of many professionals, can then be interpreted as a problem of multiobjective optimizatio
The church of Longuelo by Pino Pizzigoni. Design and construction of an experimental structure
No full textThe article presents and analyses a quite obscure case of those experimentations bounding architecture and structural form that so praised were in the mid-IX Century, namely the Church of Longuelo, designed by Pino Pizzigoni - an outstanding but quite obscure work. The first part of the paper describes the personality of the architect, showing his experience with concrete shells. The second part is about the project, both from the architectural and the structural point of view. The third one analyses the structural behaviour of the church, which may be seen as a hybrid building, as the guesses by Pizzigoni were quite confused - experimental in its truest sense. Then, the building of the church is presented, all along with its present status. Finally, some considerations about the influence of such work are reported
Structural Reciprocity: Critical Overview and Promising Research/Design Issues
No full textReciprocity is a structural principle that has fascinated designers and builders throughout the world since ancient times. Despite the topic's having been studied by various academics, designers and researchers, a critical overview of the references is still missing, as is an outline and discussion of the current and future promising research/design issues. Further, no single text provides an exhaustive definition of the principle of structural reciprocity and it must be critically reconstructed from several different sources. This paper aims to fill in these gaps, providing a complete and annotated list of references, in which historical examples, as well as patents, research articles and terminological issues are discussed. A consistent definition of structural reciprocity is also proposed, and the promising developments of such a principle are outlined in order to guide designers and researchers in the futur
Optimal design of glass grid shells with quadrilateral elements by means of a genetic algorithm
No full textDante Bini's Form-Resistant Binishells
Full text linkThis paper aims to review Dante Bini’s career, as well as his form-resistant Binishell and other pneumatic construction systems. The role of Mario Salvadori in Bini’s international success works as the introduction to a broader discussion about the relationship between innovation in design and innovation in construction for shell and gridshell designers. The second part of the paper focuses, instead, on Bini’s double profile—architect and builder—which led him to develop his inventions both architecturally and as commercial products
On the optimal design of glass grid shells with planar quadrilateral elements
No full textThis paper presents an optimization procedure for the solution of the planarity problem, a requirement of grid shells with four or more sides faces that need of having four adjacent nodes laying on a plane in order to use plane glass slabs as cladding elements. It can be satisfied by applying specific geometric rules in the grid generation phase but, when the architectural shape is already defined at the conceptual stage, an optimization procedure can yield to suitable configurations. A Relaxation method based on nodal planarity errors and an evolutionary population based Genetic Algorithm have been applied to set of benchmarks, in order to tune parameters and to obtain general information about the solution. the problem and their efficiency compared. The Relaxation method in general shows better efficiency in reaching optimal solutions, as an effect of the regularity of the target function. The Genetic Algorithm, on the other hand, performs a wider exploration of feasible solutions, generating unexpected sub-optimal configurations.This paper presents an optimization procedure for the solution of the planarity problem, a requirement of grid shells with four or more sides faces that need of having four adjacent nodes laying on a plane in order to use plane glass slabs as cladding elements. It can be satisfied by applying specific geometric rules in the grid generation phase but, when the architectural shape is already defined at the conceptual stage, an optimization procedure can yield to suitable configurations. A Relaxation method based on nodal planarity errors and an evolutionary population based Genetic Algorithm have been applied to set of benchmarks, in order to tune parameters and to obtain general information about the solution. the problem and their efficiency compared. The Relaxation method in general shows better efficiency in reaching optimal solutions, as an effect of the regularity of the target function. The Genetic Algorithm, on the other hand, performs a wider exploration of feasible solutions, generating unexpected sub-optimal configurations
Dante Bini's air structures (1964-1979). From early Italian prototypes to the Australian experience
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