000009643 001__ 9643
000009643 005__ 20141205150226.0
000009643 04107 $$aeng
000009643 046__ $$k2008-10-12
000009643 100__ $$aCattari, S.
000009643 24500 $$aA Strength Criterion for the Flexural Behaviour of Spandrels in Un-Reinforced Masonry Walls

000009643 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009643 260__ $$b
000009643 506__ $$arestricted
000009643 520__ $$2eng$$aWith reference to the in-plane behaviour of masonry walls, it is possible to recognize basically two structural components: piers and spandrels. Piers are the main vertical resistant elements for both dead and seismic loads. Spandrels are usually classified as secondary elements: although hardly investigated at all in literature (unlike piers), they significantly affect the seismic capacity of the structure. Firstly, a considerable energy dissipation is related to their damage. Moreover, the coupling effectiveness associated with these elements significantly influences the boundary conditions of piers (i.e. fixed-fixed or cantilever) with remarkable repercussions on the global response of the structure. In the case of existing buildings, common practice (explained by the frequent lack of other tensile resistant elements coupled) is to neglect masonry spandrels in the model leading to a large number of historical buildings being assessed as “unsafe” according to current seismic codes. It is clearly evident that such a result is not plausible: the adopted hypothesis is too severe and masonry spandrels supply unknown resources to the structure. Thus reliable predictive models are needed. In the paper a resistance criterion finalized to interpretation of their flexural behaviour is proposed. It has basically been founded on the interlocking phenomena which can be originated at the interface between the end-sections of the spandrel and the contiguous masonry. A set of parametrical non linear analyses has been performed in order to validate the proposal. Finally some applications to complex masonry walls are presented in order to assess the effects on the global response.

000009643 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009643 653__ $$amasonry, spandrel strength, in-plane response, simplified models, seismic capacity

000009643 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009643 720__ $$aCattari, S.$$iLagomarsino, S.
000009643 8560_ $$ffischerc@itam.cas.cz
000009643 8564_ $$s418153$$uhttps://invenio.itam.cas.cz/record/9643/files/05-04-0041.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-04-0041.
000009643 962__ $$r9324
000009643 980__ $$aPAPER