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5 results on '"Orduña, Agustín"'

3. Numerical study on the seismic performance of adobe vaulted architecture: A case study from Iran

Author

Sadeghi, Neda H., Oliveira, Daniel V., Correia, Mariana, Azizi-Bondarabadi, Hamed, and Orduña, Agustín

Subjects
Earthen Architecture, Iran, Adobe vernacular heritage, Adobe vaulted architecture
Abstract

Past earthquakes prove that adobe vaults, as traditional roofing systems for adobe architecture located in hot and dry areas, play a significant role in the seismic behaviour of adobe buildings. This paper reports the results from a geometrical survey carried out on 60 traditional adobe vaulted houses from the city of Yazd, Iran, followed by a simplified seismic assessment. To this end, a reference vault combination is considered as representative of the sample. Limit analysis theory implemented in Block2D software is employed to carry out the numerical analyses. Results indicate that parameters such as vault span, vault rise, supporting wall thickness and mechanical properties of adobe masonry have a significant influence on the safety factor.

Published
2016

5. Cap Model for Limit Analysis and Strengthening of Masonry Structures.

Author

Orduña, Agustín and Lourenço, Paulo B.

Subjects
*MASONRY, *CONSTRUCTION, *MATHEMATICAL optimization, *MATHEMATICAL programming
Abstract

This paper presents a general method for the limit analysis of structures made of rigid blocks, which can be used in the assessment of ancient masonry structures. This method takes into account nonassociated flow rules and limited compressive stresses for masonry. The mathematical programming problem resulting from the formulation is a nonlinear optimization problem. The feasible initial solution is obtained by solving a mixed complementarity problem while, in a second step, the complementarity constraint is temporarily relaxed to allow for optimizing the load factor. A tie element added to the rigid block formulation permits the analysis and design of strengthening. Several results, obtained by a computer implementation of the method, are presented and discussed. The results show the validity of the method by comparison with experimental data, and also show the benefit of the approach in providing a better insight into the behavior of ancient masonry structures. [ABSTRACT FROM AUTHOR]

Published
2003
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