Non linear analysis and design of externally prestressed beams

2004 ◽  
Vol 88 (5) ◽  
pp. 167-172
Author(s):  
Aldo Cauvin ◽  
Massimo Giudici
Author(s):  
Marek Vokál ◽  
Michal Drahorád

Abstract This paper deals with numerical analysis and design of slander prismatic masonry beams loaded predominantly by axial force and bending moment in plane of the principal moment of inertia. Because of the material non-linearity, classical mathematical theory of slender columns cannot be applied for masonry elements, therefore the proposed method uses iterative non–linear calculation considering both material and geometrical non–linearity.


Author(s):  
Ludmila Kormosova ◽  
Tomas Augustin ◽  
Jaroslav Halvonik

This paper is focused on the assessment of punching capacity of the slab-column connections without transverse reinforcement with openings located close to a column. Non-linear analysis and design equations from the relevant codes of practise are used for the prediction of the punching resistance of flat slab specimens supported by the rectangular columns with different ratio h/d of the column’s cross-section. The non-linear models were calibrated using experimental results from the laboratory tests. The main goal of the study is an investigation of the effect of the openings on the punching capacity and as well as testing accuracy of the design equations for the prediction of the punching resistance. Several methods for the reduction of the control perimeter length accounting for presence of the openings were tested in order to find the most general method for the estimation of the punching capacity. However, standard methods introduced in the relevant codes of practise provide very inconsistent results concerning of the model’s safety for different position of the openings as well as for different cross-section of the columns. Therefore modification of the methods was proposed and verified using obtained results.


Author(s):  
Oldřich Sucharda ◽  
David Mikolášek ◽  
Jiří Brožovský

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.


Author(s):  
Ben Hunter ◽  
Andrew Greenhalgh ◽  
Bettina Karsten ◽  
Mark Burnley ◽  
Daniel Muniz-Pumares

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