CAVICCHI , Andrea Luca

The influence of the bond pattern on the in-plane limit strength of masonry is analyzed through a simplified procedure based on the application of the safe theorem of limit analysis to the unit cell that generates the whole masonry by periodic repetition. The strength of the bricks and mortar joints is represented by approximate models of weak...

The influence of the bond pattern on the in-plane limit strength of masonry is analyzed through a simplified procedure based on the application of the safe theorem of limit analysis to the unit cell that generates the whole masonry by periodic repetition. The limit strength domains of running bond, English bond and herringbone bond masonry are...

A numerical procedure for the limit analysis of multispan masonry bridges including the arch-fill interaction is developed based on the upper bound theorem. A twodimensional model is defined in which arches and piers are described as beams made up of no tensile resistant (NTR), ductile in compression material, and the fill as a Coulomb material...

A numerical procedure for the limit analysis of multispan masonry bridges including the arch-fill interaction is developed based on the upper bound theorem. A twodimensional model is defined in which arches and piers are described as beams made up of no tensile resistant (NTR), ductile in compression material, and the fill as a Coulomb material...

The contribution of the arch-fill interaction to the load carrying capacity of masonry bridges can be large [1]. While a comprehensive description of the arch-fill-spandrels interaction requires a three-dimensional model, a simplified description of the fill contribution to the load carrying capacity of the bridge can be implemented in...

Il contributo dell'interazione arco-riempimento alla determinazione del carico di collasso dei ponti in muratura può essere molto grande (Page, 1993). Mentre una descrizione esaustiva dell'interazione arco-riempimento-timpani richiederebbe la definizione di un modello meccanico tridimensionale, sotto opportune condizioni e limitazioni una...

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Filling materials directly laid on vaults are a common building technique that generally increases the load carrying capacity. This increase can be much larger than the stabilizing effect of a dead load on the vault and it is due to the mechanical interaction between vault and fill that activates the strength resources of the fill. This...

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The paper deals with the nonlinear response up to failure of flat and curved composite and sandwich structures subjected to blast loading. The post-elastic response of continuously supported sandwich beams subjected to dynamic pulse loads has been studied using a model that approximates the skin of the sandwich as a set of Timoshenko beams...

The limit analysis of masonry bridges is tackled by considering the interaction between arches, piers and fill. A two-dimensional FE model is defined in which arches and piers are described as beams made of no tensile resistant (NTR), ductile in compression material, and the fill as a heavy rigid-plastic material under plane strain conditions....

The paper deals with the nonlinear response of composite sandwich beams subject to static and dynamic out-of-plane loading. The internal structure of composite sandwich systems gives rise to complex damage and failure mechanisms. The objective of the study is to analyse two specific damage mechanisms, namely skin delamination and core crushing,...

The limit analysis of masonry bridges is faced/tackled by considering the interaction between arches, piers and fill. The former are modelled by beams made of no tensile resistant material while the latter as a heavy rigid-plastic material in the simplifying hypothesis of plane strain. On the upper surface of the fill traction distributions are...

The paper deals with the dynamic interaction of multiple delaminations in composite plates subject to out of plane loading. In order to develop a basic understanding of the problem, the work refers to the model system of a multiply delaminated plate deforming in cylindrical bending. Interaction effects on fracture parameters, dynamic crack...

The structural models for the assessment of masonry bridges need to represent all the features of the mechanical response of both the material and the structure. In this work, two bi-dimensional procedures are discussed: i) a non linear incremental approach assumes for masonry an elasto-plastic model with controlled ductility in compression and...

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In previous papers the authors examined the problem of the wrinkling of plane isotropic biological membranes following the approach of Pipkin and treating the out of plane geometric nonlinearities as constitutive nonlinearities through a modification of the elastic potential. The problem has been solved within the framework of finite strain...

A model is presented for the simulation of procedures of reconstructive surgery characterized by the excision of a cutaneous defect and the closure and suture of the wound edges. The skin is modeled as a plane membrane undergoing large deformations having a Fung type constitutive response. Skin wrinkling, which is a typical outcome of the...

This paper presents some aspects of the approach to the assessment of masonry arch bridges developed by the Italian National Railway Authority (RFI) and the University of Genoa. Being the non linear response of masonry a crucial issue in the evaluation of the load carrying capacity of a bridge, a No Tensile Resistance approach, with limited...