The Overall Research Results of Prestressed I-beams Made of Ultra-high Performance Concrete

Tej, Petr; Kolı́sko, Jiřı́; Kněž, Petr; Čech, Jindřich

doi:10.1088/1757-899x/246/1/012051

Cited by 4 publications

(2 citation statements)

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“…Scientific papers in the field of HPC are usually focused narrowly on mechanical properties [20], compressive strength and microstructure [21], influence of high temperature [22] or, on the other hand, on testing of structural elements [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

2021

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High-performance concrete (HPC) is subjected to wide attention in current research. Many research tasks are focused on laboratory testing of concrete mechanical properties with specific raw materials, where a mixture is prepared in a relatively small amount in ideal conditions. The wider utilization of HPC is connected, among other things, with its utilization in the construction industry. The paper presents two variants of HPC which were developed by modification of ordinary concrete used by a precast company for pretensioned bridge beams. The presented variants were produced in industrial conditions using common raw materials. Testing and comparison of basic mechanical properties are complemented with specialized tests of the resistance to chloride penetration. Tentative expenses for normal strength concrete (NSC) and HPC are compared. The research program was accomplished with a loading test of model experimental pretensioned beams with a length of 7 m made of ordinarily used concrete and one variant of HPC. The aim of the loading test was to determine the load–deformation diagrams and verify the design code load capacity calculation method. Overall, the article summarizes the possible benefits of using HPC compared to conventional concrete.

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Section: Introductionmentioning

confidence: 99%

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

2021

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“…Experience with static and dynamic measurement compared to computational models resulting from similar measurements made at the author's workplace on Libeň bridge and similar bridge structures [1]- [4]. Experience with designing of bridge structures author obtained participating on several tasks detailly published in articles [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Load Test of Libeň Bridge Over Vltava River in Prague and Concept of Repair

Tej¹,

Mourek²,

Blank³

2021

12th International Conference on Structural Analysis of Historical Constructions

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Ductility‐oriented design of UHPC T‐beams: Mechanical model and design recommendations

Alsomiri,

Liu,

Wang

et al. 2024

Structural Concrete

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Ultrahigh performance concrete (UHPC) has recently become a major focus garnering substantial attention due to its remarkable mechanical properties. UHPC has been increasingly employed across diverse projects in the construction industry. However, the structural ductility of UHPC members has yet to be fully established and is often compromised by the manifestation of the crack localization phenomenon. This paper presents the flexural test results of five T‐beams and introduces a model for predicting the flexural capacity and failure modes of UHPC T‐beams. The model employs the curvature ductility index as a measurement for evaluating and ensuring the member's ductility. The results show that the flexural behavior of UHPC T‐beams can be characterized by four key points representing cracking, reinforcement yielding, crack localization, and post‐localization capacity. The validity of the model is substantiated by experimental data from this study and complemented by test data collected from the literature. The proposed model is then employed to derive ductility‐oriented design limits, including minimum and maximum reinforcement ratios and minimum localization strain capacity. Finally, the paper summarizes the design recommendations and provides a classification of section conditions, reinforcement limits, localization strain limits, adequate ductility range, and the feasible ductile design range.

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The Overall Research Results of Prestressed I-beams Made of Ultra-high Performance Concrete

Cited by 4 publications

References 1 publication

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

Static and Dynamic Load Test of Libeň Bridge Over Vltava River in Prague and Concept of Repair

Ductility‐oriented design of UHPC T‐beams: Mechanical model and design recommendations

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