OPTIMIZATION OF THE STRUCTURES AT SHAKEDOWN AND ROSEN’S OPTIMALITY CRITERION
Journal Title: Civil and Environmental Engineering Reports - Year 2016, Vol 3, Issue 22
Abstract
Paper focuses on the problems of application of extreme energy principles and nonlinear mathematical programing in the theory of structural shakedown. By means of energy principles, which describes the true stress-strain state conditions of the structure, the dual mathematical models of analysis problems are formed (static and kinematic formulations). It is shown how common mathematical model of the structures optimization at shakedown with safety and serviceability constraints (according to the ultimate limit state (ULS) and serviceability limit state (SLS) requirements) on the basis of previously mentioned mathematical models is formed. The possibilities of optimization problem solution in the context of physical interpretation of optimality criterion of Rosen‘s algorithm are analyzed.
Authors and Affiliations
Piotr ALAWDIN, Juozas ATKOČIŪNAS, Liudas LIEPA
CHANGES TO WATER QUALITY IN THE WATER SUPPLY NETWORK OF ZIELONA GÓRA
The article presents physiochemical parameter changes in water supply network of Zielona Góra. On the basis of the obtained test results, the impact of prolonged retention of water in the network on its quality was deter...
‘OLD-NEW’ MINING TOWNS - EXAMPLES OF THE RENOVATION AND ADAPTATION OF POST-INDUSTRIAL OBJECTS
Poland’s economic transformation has proved to be a critical phase in the contemporary development of its industrial cities, initiating profound spatial and functional changes. In researching the basics of the developmen...
RENOVATION AND MODERNIZATION OF RESIDENTIAL STRUCTURES IN GLIWICE BASED ON SURVEY OF THE ENVIRONMENT BUILT FROM THE YEARS 1848-2014
The subject of the survey carried out in 2013-2014 are changes in Gliwice residential substance in relation to the two fundamental issues:how proceeded transformation of the existing housing stock, which changes has it u...
The sozological and hygrographic maps of Poland as a basis for the analysis of environmental changes in mining areas
In the forthcoming decades large resources of lignite are going to play a role of energy security stabiliser in Poland. This proves the significance of the problems of mining areas in geographical space and entails an in...
EVALUATION OF DYNAMIC CHARACTERISTICS OF THE FOOTBRIDGE WITH INTEGRAL ABUTMENTS
The paper presents the results of dynamic field tests and numerical analysis of the footbridge designed as a three-span composite structure with integral abutments. The adopted design solution which has allowed to achiev...