000013441 001__ 13441
000013441 005__ 20161114165554.0
000013441 04107 $$aeng
000013441 046__ $$k2011-05-25
000013441 100__ $$aYadollahi M., Mohabbi
000013441 24500 $$aThe Effect of Initial Geometric Imperfection on the Load Bearing Capacity of Double Layer Barrel Vault Space Structures

000013441 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013441 260__ $$bNational Technical University of Athens, 2011
000013441 506__ $$arestricted
000013441 520__ $$2eng$$aThe existence of some geometrically imperfect members in space structures are almost inevitable, beside that there are some imperfections in botching the structures and the fact that they are effective in producing internal forces is undeniable. When a compressing member yields, in spite of that, continues bearing a lot of load, on the other hand the buckled compressive member goes to a critical situation and losses its stiffness and shed its load on the other members, causing a progressive collapse. Double layer barrel vaults which have statically highly indeterminate degree , may cause this phenomena because of unsuitable members .As the members initial curvature is the most popular geometric imperfection which is common in practical structures , in this thesis has chosen as an effective imperfection ,for research. We have tried to study this effect on the load bearing capacity of model structure. The selected model is a double layer barrel vault which is subjected to uniform concentrated load applied vertically downward to each node of the upper layer and members assumed to be pin-ended .The ratio of pure height of structure to pure opening mouth is 0.22 and the kind of layers decoration is a square on square. Two forms of analysis carried out; one for monotonous imperfections and the other for 30 cases of random imperfections which based on Monte Carlo Methods. After analysis, the ratio of maximum reduction to common case was about %41, also the suitable way of certain conclusion is presented with Monte Carlo Method.

000013441 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013441 653__ $$aRandom Imperfection, Geometric Nonlinearity, Monte Carlo Method, Buckling Strength, Initial Geometric Imperfection, Reliability, Certainty, Imperfection Sensitivity

000013441 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013441 720__ $$aYadollahi M., Mohabbi$$iGul, R.$$iPolat, R.$$iYadollahi B., Mohebbi$$iGul M., S.
000013441 8560_ $$ffischerc@itam.cas.cz
000013441 8564_ $$s656427$$uhttps://invenio.itam.cas.cz/record/13441/files/109.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 02 Advances in Computational Mechanics for Security Applications.
000013441 962__ $$r13401
000013441 980__ $$aPAPER