000019638 001__ 19638
000019638 005__ 20170118182329.0
000019638 04107 $$aeng
000019638 046__ $$k2017-01-09
000019638 100__ $$aPenna, Andrea
000019638 24500 $$aAn Improved Macroelement Model Accounting for Energy Dissipation in Flexural Failure Modes of Masonry Walls

000019638 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019638 260__ $$b
000019638 506__ $$arestricted
000019638 520__ $$2eng$$aIn the numerical modelling of flexural behaviour of masonry buildings by means of macroelement models, it is important to account for the limited compressive strength and the proper energy dissipation of the material. The macroelement model currently implemented in the TREMURI computer program is featured by a bi-linear compressive behaviour with limited strength, capable of accounting for toe-crushing during cyclic loads, and no tension strength. In addition, in the constitutive relationship, the secant unloading-reloading branch allows for energy dissipation, together with stiffness degradation. From the numerical simulation of experimental tests, an underestimation of the dissipated energy during cyclic loads was noticed. In order to better capture the energy dissipation, in this work an improved model is proposed. In addition to the assumption of limited compressive strength and no tension behaviour, the improved model is characterized by an unloading branch with slope equal to the initial stiffness, thus allowing an increased energy dissipation and the ability of modelling displacement accumulation. The new macroelement model is then implemented in the TREMURI program. In order to validate the model, comparisons with distributed nonlinear spring models implementing the same constitutive relationship and simulations of experimental tests on masonry piers are performed.

000019638 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019638 653__ $$amasonry; macroelement model; nonlinear analysis; energy dissipation

000019638 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019638 720__ $$aPenna, Andrea$$iGalasco, Alessandro$$iMagenes, Guido$$iBracchi, Stefano
000019638 8560_ $$ffischerc@itam.cas.cz
000019638 8564_ $$s1005295$$uhttps://invenio.itam.cas.cz/record/19638/files/4067.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4067.
000019638 962__ $$r16048
000019638 980__ $$aPAPER