Modul pružnosti betonu stávajících mostních konstrukcí

Elastic Modulus of Concrete of Existing Bridge Constructions

conference paper

Czech

Tato práce si klade za cíl určit modul pružnosti betonu vybraných stávajících mostních konstrukcí, a to jak statického modulu pružnosti, tak dynamického modulu pružnosti. Hlavní snahou je pokusit se zjistit závislosti modulu pružnosti na jiných vlastnostech betonu, jako je jeho pevnost v tlaku, či rychlost šíření ultrazvukového vlnění v betonu.

This work aims at finding out the modulus of elasticity of sampled existing bridge constructions. For the testing, five rotary core samples from five different bridges were selected. All the selected bridges were built in the 70s and all of them form a crossroad in Ostrava. The rotary core samples were tested for dynamic and static moduli of elasticity and compressive strength of concrete. The results proved that the modulus of elasticity was not absolutely strength dependent. It can be said, however, that the higher the strength, the higher the modulus of elasticity. What is decisive is the technology and quality of manufacturing concrete. This is visible on the fact that the quality of concrete differed even when several bores were taken from one and the same bridge. Hence is clear that the results of the findings were affected by this non-homogeneity.

Stávající mostní konstrukce, jádrové vývrty, pevnost betonu v tlaku, dynamický modul pružnosti, statický modul pružnosti

Existing bridge construction, rotary core sample, compressive strength of concrete, dynamic modulus of elasticity, static modulus of elasticity

KOCÁB, D.

2010

24. 2. 2010

CERM

Brno

978-80-214-4042-5

JUNIORSTAV 2010 - Sborník Anotací

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