000009398 001__ 9398
000009398 005__ 20141205150202.0
000009398 04107 $$aeng
000009398 046__ $$k2008-10-12
000009398 100__ $$aAmato, G.
000009398 24500 $$aInfilled Frames: Influence of Vertical Load on the Equivalent Diagonal Strut Model

000009398 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009398 260__ $$b
000009398 506__ $$arestricted
000009398 520__ $$2eng$$aThe influence of masonry infills on framed structures behaviour is a central topic in the seismic design procedures and in the hazard evaluation of existing buildings. Many models use equivalent strut elements in order to represent the infill but among the several parameters influencing the interaction between frame and infill the level of vertical loads is hardly considered. Nevertheless, neglecting this effect may produce inaccuracy because the axial deformations of the loaded columns can produce non-negligible variation in the contact region between infill and surrounding frame, influencing the seismic response of the infilled frame. It can easily been observed that, when this regions extends, the infill behaviour switches from that of a strut element to the one of a plate-shell. An equivalent diagonal pin-jointed strut model, able to represent the stiffening effect of the infill in presence of vertical loads, is given in this paper. By a numerical experimentation based on a FEM discretization of the frame-infill system, the lateral stiffness of some infilled frames is evaluated; then the ideal cross-section of the strut equivalent to the infill is obtained for different levels of vertical loads by imposing the equivalence between the frame containing the infill and the frame containing the diagonal strut. This way a correlation available in the literature between a parameter depending on the characteristics of the infilled frame and the equivalent strut width is generalized here to consider the vertical load presence. This correlation is provided in an analytical approximated form of immediate use in the practical applications.

000009398 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009398 653__ $$aInfilled frames, equivalent diagonal pin-jointed strut model, vertical loads influence.

000009398 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009398 720__ $$aAmato, G.$$iCavaleri, L.$$iFossetti, Marinella$$iPapia, Maurizio
000009398 8560_ $$ffischerc@itam.cas.cz
000009398 8564_ $$s354766$$uhttps://invenio.itam.cas.cz/record/9398/files/05-01-0479.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-01-0479.
000009398 962__ $$r9324
000009398 980__ $$aPAPER