Calibration under uncertainty for finite element models of masonry monuments

Atamturktur, Sezer, ; Hemez, Francois, ; Unal, Cetin

Los Alamos National Laboratory

关键词: Safety Engineering;    Buildings;    Mathematical Models;    42 Engineering;    Concretes;   

DOI  :  10.2172/974684
RP-ID  :  LA-14414
RP-ID  :  DE-AC52-06NA25396
RP-ID  :  974684

美国|英语

来源: UNT Digital Library

【 摘 要 】

Historical unreinforced masonry buildings often include features such as load bearing unreinforced masonry vaults and their supporting framework of piers, fill, buttresses, and walls. The masonry vaults of such buildings are among the most vulnerable structural components and certainly among the most challenging to analyze. The versatility of finite element (FE) analyses in incorporating various constitutive laws, as well as practically all geometric configurations, has resulted in the widespread use of the FE method for the analysis of complex unreinforced masonry structures over the last three decades. However, an FE model is only as accurate as its input parameters, and there are two fundamental challenges while defining FE model input parameters: (1) material properties and (2) support conditions. The difficulties in defining these two aspects of the FE model arise from the lack of knowledge in the common engineering understanding of masonry behavior. As a result, engineers are unable to define these FE model input parameters with certainty, and, inevitably, uncertainties are introduced to the FE model.