Torsional buckling of reinforced concrete beams
Klopení železobetonových nosníků
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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Cílem této diplomové práce je nalezení uspokojivého řešení na problematiku klopení železobetonových nosníků a sestavení výpočetního nástroje, který by zvládl tuto problematiku vhodným způsobem vyřešit. Nejdříve je však nutné provést rešerši existujících přístupů k této problematice a sepsat základní myšlenky problematiky pro klopení železobetonových nosníků, jelikož je tato problematika jen málo probádaná a chybí pro ni nějaké podchycení i v normách. Následná praktická část pak navazuje na práci prof. Pauliho, který se klopení věnoval a zkoumal jeho účinky na 6 tělesech. Tato tělesa byla nejprve vymodelována v programu FERMO. Pozorovaly se na nich odchylky ve výsledcích v závislosti na změnách ve specifikaci modelů v programu. Na závěr byl sestaven výpočet, vycházející z teoretických poznatků prof. Pauliho, který měl za úkol provést stanovení torzní tuhosti průřezu pouze pro jeho tlačenou část. Tento výpočet měl sloužit jako rozšíření výpočetního softwaru FERMO a jeho výpočetní knihovny TRIMAS.
The objective of this diploma thesis is to find a satisfactory solution to the problem of lateral buckling of reinforced concrete beams and to construct a calculation tool, that would be able to solve this problem in a suitable way. First, however, it is necessary to carry out a search of existing approaches to this issue and to write down the basic ideas of the issue for lateral buckling of reinforced concrete beams, as this issue is little researched and there are no guidelines for it even in the standards. The subsequent practical part then follows on from the work of prof. Pauli, who devoted himself to lateral buckling and investigated its effects on 6 beams. These beams were modeled in the FERMO program. Then, deviations in the results were observed depending on the changes in the specification of each model in the program. Subsequently, a calculation based on the theoretical thesis of prof. Pauli, that had the task of determining the torsional stiffness of the cross-section only for the compressed part, was prepared. This calculation was to serve as an extension of the FERMO software and its calculation core – TRIMAS.
The objective of this diploma thesis is to find a satisfactory solution to the problem of lateral buckling of reinforced concrete beams and to construct a calculation tool, that would be able to solve this problem in a suitable way. First, however, it is necessary to carry out a search of existing approaches to this issue and to write down the basic ideas of the issue for lateral buckling of reinforced concrete beams, as this issue is little researched and there are no guidelines for it even in the standards. The subsequent practical part then follows on from the work of prof. Pauli, who devoted himself to lateral buckling and investigated its effects on 6 beams. These beams were modeled in the FERMO program. Then, deviations in the results were observed depending on the changes in the specification of each model in the program. Subsequently, a calculation based on the theoretical thesis of prof. Pauli, that had the task of determining the torsional stiffness of the cross-section only for the compressed part, was prepared. This calculation was to serve as an extension of the FERMO software and its calculation core – TRIMAS.