A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Non-Linear Seismic Analysis of Masonry Buildings
Non-linear analysis is the most viable tool to get accurate predictions of the actual response of masonry structures under earthquake loading. Analytical methods based on the idealisation of masonry walls with openings as systems of macro-elements allow not only to capture the main failure modes observed after past earthquakes, but also to ensure a limited computational demand in engineering practice. The present thesis deals with non-linear incremental static (pushover) analysis on masonry buildings modelled through evolutionary spread plasticity macro-elements. In the first part of the work, fundamentals of structural analysis, seismic risk, and performance-based seismic design are reviewed along with non-linear static procedures and macro-element methods for seismic analysis of masonry buildings. The second part of the work deals with theoretical advances in non-linear seismic analysis of masonry buildings. In particular, an evolutionary spread plasticity macro-element has been developed and static pushover procedures for individual masonry walls, as well as entire buildings, are presented and discussed in detail. The proposed macro-element has been defined as ‘evolutionary’ because its inner reacting domain changes as the lateral drift demand increases. Such an evolution is caused by the spreading of cracking and yielding within the masonry. Namely, tensile cracking of masonry induces significant reductions in the effective width of cross-sections, which then depends on the magnitude of the given lateral drift (geometrical non-linearity). Yielding of masonry develops near the extreme parts of the macro-element, which are subjected to maximum bending moment. Mechanical non-linearity of masonry in compression is also taken into account through a deformation-based approach. In fact, the mechanical behaviour of the macro-element is characterised for different constitutive laws of masonry, by means of (1) two- and three-dimensional flexural strength domains (to be coupled with classical strength domains), (2) ...
Non-Linear Seismic Analysis of Masonry Buildings
Non-linear analysis is the most viable tool to get accurate predictions of the actual response of masonry structures under earthquake loading. Analytical methods based on the idealisation of masonry walls with openings as systems of macro-elements allow not only to capture the main failure modes observed after past earthquakes, but also to ensure a limited computational demand in engineering practice. The present thesis deals with non-linear incremental static (pushover) analysis on masonry buildings modelled through evolutionary spread plasticity macro-elements. In the first part of the work, fundamentals of structural analysis, seismic risk, and performance-based seismic design are reviewed along with non-linear static procedures and macro-element methods for seismic analysis of masonry buildings. The second part of the work deals with theoretical advances in non-linear seismic analysis of masonry buildings. In particular, an evolutionary spread plasticity macro-element has been developed and static pushover procedures for individual masonry walls, as well as entire buildings, are presented and discussed in detail. The proposed macro-element has been defined as ‘evolutionary’ because its inner reacting domain changes as the lateral drift demand increases. Such an evolution is caused by the spreading of cracking and yielding within the masonry. Namely, tensile cracking of masonry induces significant reductions in the effective width of cross-sections, which then depends on the magnitude of the given lateral drift (geometrical non-linearity). Yielding of masonry develops near the extreme parts of the macro-element, which are subjected to maximum bending moment. Mechanical non-linearity of masonry in compression is also taken into account through a deformation-based approach. In fact, the mechanical behaviour of the macro-element is characterised for different constitutive laws of masonry, by means of (1) two- and three-dimensional flexural strength domains (to be coupled with classical strength domains), (2) ...
Non-Linear Seismic Analysis of Masonry Buildings
Parisi, Fulvio (author)
2010-11-30
Parisi, Fulvio (2010) Non-Linear Seismic Analysis of Masonry Buildings. [Tesi di dottorato] (Inedito)
Theses
Electronic Resource
Italian , English
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