000019101 001__ 19101
000019101 005__ 20170118182259.0
000019101 04107 $$aeng
000019101 046__ $$k2017-01-09
000019101 100__ $$aPeralta, Nicolas
000019101 24500 $$aDetermination of Homogenized Nonlinear Material Parameters of Masonry Walls

000019101 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019101 260__ $$b
000019101 506__ $$arestricted
000019101 520__ $$2eng$$aThe theory of micromechanical homogenization is used for the prediction of effective material properties for the use in macroscopic nonlinear simulations of masonry structures subjected to lateral loads, e.g. due to seismic loads, using a wellestablished model such as the total strain rotating crack (TSRC) model. The mechanical and geometrical properties of the constituents (mortar joints and brick units) are explicitly considered in a detailed microscopic three-dimensional (3D) finite element (FE) model of a typical masonry unit cell subjected to a monotonically increasing state of macro strain. The macro stress history is obtained so that a macroscopic stress-strain relationship is established for a particular orientation of principal strains. The effective parameters for nonlinear analysis are selected based on the obtained stress-strain curve. This set of effective parameters is used in a macroscale model to test their ability in replicating full micro analytical modeling as well as experimental results of full-scale specimens. The proposed homogenized model is suitable for an efficient computation of the nonlinear behavior of masonry structures where experimental results are unavailable. On the other hand, it is also suitable for parameters determination for masonry structures subjected to complex state of stresses as the case of a masonry wall containing openings and/or complicated geometric/loading conditions. Such a parametric model can also serve as a key component for the analytical estimation of the seismic vulnerability of systems containing masonry components, e.g. masonry structures and infilled frames, for subsequent reliability-based performance-based earthquake engineering applications.

000019101 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019101 653__ $$aMicromechanics; homogenization; masonry structures; nonlinear analysis.

000019101 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019101 720__ $$aPeralta, Nicolas$$iMosalam, Khalid
000019101 8560_ $$ffischerc@itam.cas.cz
000019101 8564_ $$s1293363$$uhttps://invenio.itam.cas.cz/record/19101/files/2849.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2849.
000019101 962__ $$r16048
000019101 980__ $$aPAPER