000018502 001__ 18502
000018502 005__ 20170118182225.0
000018502 04107 $$aeng
000018502 046__ $$k2017-01-09
000018502 100__ $$aMehrotra, Anjali
000018502 24500 $$aA Modelling Tool for Dynamic Analysis of Masonry Collapse Mechanisms

000018502 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018502 260__ $$b
000018502 506__ $$arestricted
000018502 520__ $$2eng$$aTypical out-of-plane collapse mechanisms for unreinforced masonry structures have been well documented. During assessment, these collapse mechanisms are usually evaluated from a static perspective, in order to determine the ground acceleration which would activate the mechanism. As the structure can resist larger ground motions due to dynamic resistance that increases with the scale of the structure, a multiple of the static acceleration is often used in assessment. Alternatively, the dynamics of these nonlinear collapse mechanisms are approximated by a single-degree-of-freedom linearelastic oscillator. However, there are limitations to the accuracy of this approximation. As an alternative, the equations of motion for potential collapse mechanisms can be solved directly using rocking dynamics. Deriving these equations can be cumbersome and time-consuming, particularly for structures with complicated geometries and mechanisms which may involve multiple elements in the kinematic chain. In this paper, a new tool is presented which uses a digital drawing of a masonry structure in typical CAD software to directly generate the relevant equations of motion for user-defined, or automatically generated, collapse mechanisms. These equations of motion are then solved in Matlab to generate overturning envelopes which predict the response of the structure for a range of pulse-type excitations. The tool is applied to assess potential collapse mechanisms of a typical church in order to prioritise potential intervention measures.

000018502 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018502 653__ $$aMasonry; nonlinear dynamics; computational tools

000018502 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018502 720__ $$aMehrotra, Anjali$$iDejong, Matthew
000018502 8560_ $$ffischerc@itam.cas.cz
000018502 8564_ $$s649497$$uhttps://invenio.itam.cas.cz/record/18502/files/1589.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1589.
000018502 962__ $$r16048
000018502 980__ $$aPAPER