OPTIMAL SHAKEDOWN OF THE THIN-WALL METAL STRUCTURES UNDER STRENGTH AND STIFFNESS CONSTRAINTS
Journal Title: Civil and Environmental Engineering Reports - Year 2017, Vol 2, Issue 25
Abstract
Classical optimization problems of metal structures confined mainly with 1st class crosssections. But in practice it is common to use the cross-sections of higher classes. In this paper, a new mathematical model for described shakedown optimization problem for metal structures, which elements are designed from 1st to 4th class cross-sections, under variable quasi-static loads is presented. The features of limited plastic redistribution of forces in the structure with thin-walled elements there are taken into account. Authors assume the elastic-plastic flexural buckling in one plane without lateral torsional buckling behavior of members. Design formulae for Methods 1 and 2 for members are analyzed. Structures stiffness constrains are also incorporated in order to satisfy the limit serviceability state requirements. With the help of mathematical programming theory and extreme principles the structure optimization algorithm is developed and justified with the numerical experiment for the metal plane frames.
Authors and Affiliations
Piotr ALAWDIN, Liudas LIEPA
Keywords
Related Articles
- EP ID EP243258
- DOI -
- Views 75
- Downloads 0
CONCEPT OF REVITALIZATION OF SELECTED MILITARY FACILITIES OF DRAGOONS BARRACKS IN OLSZTYN
Revitalization is a complex program to restore the functioning of the neglected urban areas in terms of spatial, economic and social. Revitalization activities on post-military facilities are stopping negative phenomena,...
Reduction of pollutant concentrations in the plant systems with the inert filter bed. Part I: biological absorbtion of nitrogen and phosphorus in nitrophytes in micro - cultivations fertilized with domestic wastewater
The publication presents the experiment conducted on the nitrophyte plants of the species Polygonum persicaria L. and Epilobium parviflorum Schr., in the micro- cultivation with the inert filter bed filled in with an art...
EXPERIMENTAL STUDY ON STEEL TANK MODEL USING SHAKING TABLE
Cylindrical steel tanks are very popular structures used for storage of products of chemical and petroleum industries. Earthquakes are the most dangerous and also the most unpredictable dynamic loads acting on such struc...
Post-mining landscape ecology - analysis of selected problems, the case of Adamów Brown Coal basin
The paper presents the main problems of the development of post-mining area landscapes, which are due to the ignoring or including, to a small extend, the environmental criteria in the process of reclamation. It refers t...
ULTRASONIC INTENSIFICATION OF AEROBIC STABILIZATION OF SEWAGE SLUDGE
The aerobic stabilization of excess sewage sludge using low frequency ultrasound (25kHz) was investigated. The mechanically thickened excess sludge was obtained from full-scale wastewater treatment plants. The samples of...