000019656 001__ 19656
000019656 005__ 20170118182330.0
000019656 04107 $$aeng
000019656 046__ $$k2017-01-09
000019656 100__ $$aBeyer, Katrin
000019656 24500 $$aEffective Stiffness and Drift Capacity of Urm Walls: Are Analytical Models An Alternative To Empirical Approaches?

000019656 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019656 260__ $$b
000019656 506__ $$arestricted
000019656 520__ $$2eng$$aCode design of unreinforced masonry (URM) brick buildings is based on elastic analysis, which requires as input, among others, estimates of the in-plane drift capacity at the considered limit states. Current approaches assess the drift capacity of URM walls by means of empirical models with most codes relating the drift capacity to the failure mode and wall slenderness. Comparisons with experimental results show that such relationships result in large scatter and do not provide satisfactory predictions. The objective of this paper is to investigate whether analytical models could lead to more reliable estimates of the displacement capacity. The drift capacity is investigated using a recently developed analytical model for the prediction of the ultimate drift capacity for both shear and flexure dominated URM walls. The approach is loosely based on plastic hinge models for reinforced concrete or steel structures. It takes the influence of toe crushing in URM walls explicitly into account as along with geometric and loading conditions. It is part of a more comprehensive model describing the whole force-displacement response of URM walls failing in shear or flexure. This paper summarises the key features of this analytical drift capacity model and benchmarks its performance against a data set of 34 full scale wall tests. It shows that the analytical model yields significantly better estimates than empirical models in current codes. The paper concludes with an investigation of the sensitivity of the ultimate drift capacity to the wall geometry, static and kinematic boundary conditions by means of parametric studies.

000019656 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019656 653__ $$aunreinforced masonry walls; ultimate drift capacity; shear dominated; flexure dominated

000019656 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019656 720__ $$aBeyer, Katrin$$iWilding, Bastian
000019656 8560_ $$ffischerc@itam.cas.cz
000019656 8564_ $$s406718$$uhttp://invenio.itam.cas.cz/record/19656/files/411.pdf$$yOriginal version of the author's contribution as presented on USB, paper 411.
000019656 962__ $$r16048
000019656 980__ $$aPAPER