Jakub Hájek

Czech Technical University in Prague | ČVUT · University Centre of Energy Efficient Buildings

This article presents cross-wound carbon fiber-reinforced polymer (CFRP) shear reinforcement of hollow high-performance concrete (HPC) beams. A removable mold used to form the core of the hollow elements was utilized for reinforcement positioning. Basalt fiber-reinforced polymer (BFRP) tensile reinforcement was attached to the removable mold by spa...

The topic of the article is the verification of the tensile mechanical characteristics of selected natural fibres commonly available on the Czech market. Due to their high tensile strengths, some natural materials have a certain potential for use in specific engineering applications such as concrete reinforcement. Additionally, natural fibres are r...

Textile-reinforced concrete not only has many advantages that lead to less consumption of primary resources, but also enables the creation of thin and subtle elements. The high performance of such elements allows us to create interesting architectural features, such as translucent concrete. This article focusses on the possibility of reinforcing tr...

This article presents woven carbon-fiber-reinforced polymer (CFRP) tubular mesh used as a reinforcement on the inner surface of hollow beams made of high-performance concrete (HPC). The tubular mesh was designed to serve as both the tensile and shear reinforcement of hollow beams intended for the construction of small self-supporting structures tha...

Textile-reinforced concrete is becoming more and more popular. The material enables the realization of very thin structures and shells, often with organic shapes. However, a problem with this reinforcement occurs when the structure is bent (contains a corner), and the flexural stiffness around this bent area is required. This article presents the d...

Early design phase provides the highest potential for saving emissions and energy. Building Information Modeling (BIM) in cooperation with environmental assessment can be efficient tools for various kinds of analysis. This paper shows a possible workflow of using data from BIM in an online form for an early building assessment. Different methods of...

This paper presents the results of loading tests of subtle thin panels made of high-performance concrete. The panels are reinforced on one side with a visible carbon fabric pre-impregnated with epoxy resin. The purpose of this experiment is to compare the load-bearing capacity of the panels with carbon fabrics on the surface with the traditional co...

The development of light and very thin concrete building structures and demand for extremely thin elements in design are inter alia reasons for the development of composite materials as non-traditional reinforcement. Composite materials are currently used as reinforcement mostly in the form of fiber reinforced polymer bars similar to traditional st...