Experimental analysis of stiffness of pre-tensioned concrete bridge beams
Journal Title: Roads and Bridges - Drogi i Mosty - Year 2009, Vol 8, Issue 1
Abstract
Experimental analysis of stiffness of the pre-tensioned concrete bridge beams is a main object of the paper. The tests have been performed in two stages. In the first stage, on the test bed the concrete pre-tensioned beams have been tested up to cracking moment, and in the second stage - composite girders, with the same beams and reinforced concrete on the top, have been tested up to failure. It has been taken into account the real property of concrete in pre-tensioned beams and in placed in situ reinforced concrete. In the analysis the load - deflection curves, load - curvature relation and the reduced modulus of elasticity have been used. As a result of comparative analysis it has been established, that the reduced modulus of elasticity is a good tool for assessment of moment of decompression and prediction cracks in prestressed concrete beam before conformation of cracks, as well as evaluation of degree of plasticity of materials in tested girders in the state just before failure. We may also use the reduced modulus of elasticity for the assessment of prestressing force in prestressed concrete beams.
Authors and Affiliations
Juliusz Cieśla, Mirosław Biskup, Marian Skawiński
Keywords
Related Articles
- EP ID EP69354
- DOI -
- Views 149
- Downloads 0
Ocena właściwości krajowych popiołów lotnych wapiennych i metod ich uzdatniania
W artykule przedstawiono charakterystykę polskich popiołów lotnych wapiennych ze spalania węgla brunatnego. Szczególną uwagę poświęcono popiołom lotnym wapiennym powstającym w Elektrowni Bełchatów. Przedstawiono zmiennoś...
Analiza dynamiczna oddziaływania ruchomego koła na pokrywę studni kablowej
W pracy przedstawiono wyniki symulacji komputerowych interakcji pomiędzy przejeżdżającym kołem a betonową pokrywą studni kanalizacji kablowej. Wykorzystując najnowsze możliwości programów numerycznych opartych na Metodzi...
Design of airport pavements with use of analytical methods and FEM
The paper presents examples of design solutions obtained with analytical methods and describes the applied design approach. It also includes the outputs of analyses carried out on two types of airport pavement structures...
Analysis of expenditure on district roads in the years 2006-2010 on the example of Małopolska province
The main issue raised by the present article is the effective and efficient investing in the road engineering as a factor of road network management. The basic measure of investment effectiveness is the assessment of sat...
Evaluation of protective properties of concretes made of cements with calcareous fly ash with respect to reinforcing steel
The studies on the protective properties of concrete made of cements containing calcareous fly ash are presented in the paper. The aim of the studies carried out by electrochemical methods was to determine the susceptibi...