Analysis and modelling of the seismic behaviour of high ... - Ingegneria
Analysis and modelling of the seismic behaviour of high ... - Ingegneria
Analysis and modelling of the seismic behaviour of high ... - Ingegneria
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<strong>Analysis</strong> <strong>and</strong> Modelling <strong>of</strong> <strong>the</strong> Seismic Behaviour<br />
<strong>of</strong> High Ductility Steel-Concrete Composite Structures<br />
ABSTRACT<br />
Fabio Ferrario<br />
Department <strong>of</strong> Mechanical <strong>and</strong> Structural Engineering<br />
University <strong>of</strong> Trento<br />
Via Mesiano 77 – 38050 – ITALY<br />
Phone number: +39 0461 882572<br />
Fax number: +39 0461 882567<br />
E-mail: fabio.ferrario@ing.unitn.it<br />
In this <strong>the</strong>sis <strong>the</strong>oretical, experimental <strong>and</strong> numerical aspects <strong>and</strong> applications<br />
concerning <strong>the</strong> <strong>seismic</strong> <strong>behaviour</strong> <strong>of</strong> <strong>high</strong> ductility steel-concrete composite<br />
structure are analysed.<br />
The interest has been focused on <strong>the</strong> capability <strong>of</strong> framed structures to dissipate<br />
<strong>seismic</strong> energy by means <strong>of</strong> inelastic deformations. The basic design parameter in<br />
this approach is <strong>the</strong> ductility that should be considered as a conceptual framework<br />
in <strong>the</strong> Performance-Base Seismic Engineering (PBSE). PBSE has been developed<br />
encompassing <strong>the</strong> full range <strong>of</strong> <strong>seismic</strong> engineering issues to be referred to design<br />
<strong>of</strong> structures for predictable <strong>and</strong> controlled <strong>seismic</strong> performance within established<br />
levels <strong>of</strong> risk.<br />
The attention has been focalised on different solutions <strong>of</strong> steel <strong>and</strong> steel-concrete<br />
composite beam-to-column joints assuring <strong>the</strong> necessary ductility that can be<br />
obtained not only through careful study <strong>of</strong> building morphology, structural schemes<br />
<strong>and</strong> construction details, but also through <strong>the</strong> rational use <strong>of</strong> materials. Three<br />
specific <strong>and</strong> related topics have been analyzed <strong>and</strong> detailed analyses <strong>and</strong><br />
experimental tests on substructures have been performed in order to ensure large<br />
inelastic deformations <strong>and</strong> <strong>the</strong> necessary energy dissipation under earthquake<br />
strong motion. The results aiming at qualifying <strong>the</strong> dissipative <strong>and</strong> rotational<br />
capacities <strong>of</strong> a particular typology <strong>of</strong> beam-to-column joints are <strong>the</strong>n illustrated <strong>and</strong><br />
discussed. The objective <strong>of</strong> this study is to provide designers with precise rules<br />
regarding constructional solutions suitable to each scheme <strong>and</strong> to <strong>the</strong> associated<br />
design methodologies necessary for evaluating <strong>the</strong>ir performances.<br />
Keywords: Low-cycle fatigue, ductility, innovative beam-to-column joint design, life-<br />
safe condition.
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